Generated code / vendoring

tests/e2e/go.sum

@@ -1122,8 +1122,8 @@ go.opentelemetry.io/otel v1.19.0 h1:MuS/TNf4/j4IXsZuJegVzI1cwut7Qc00344rgH7p8bs=
 go.opentelemetry.io/otel v1.19.0/go.mod h1:i0QyjOq3UPoTzff0PJB2N66fb4S0+rSbSB15/oyH9fY=
 go.opentelemetry.io/otel/metric v1.19.0 h1:aTzpGtV0ar9wlV4Sna9sdJyII5jTVJEvKETPiOKwvpE=
 go.opentelemetry.io/otel/metric v1.19.0/go.mod h1:L5rUsV9kM1IxCj1MmSdS+JQAcVm319EUrDVLrt7jqt8=
-go.opentelemetry.io/otel/sdk v1.16.0 h1:Z1Ok1YsijYL0CSJpHt4cS3wDDh7p572grzNrBMiMWgE=
+go.opentelemetry.io/otel/sdk v1.19.0 h1:6USY6zH+L8uMH8L3t1enZPR3WFEmSTADlqldyHtJi3o=
-go.opentelemetry.io/otel/sdk v1.16.0/go.mod h1:tMsIuKXuuIWPBAOrH+eHtvhTL+SntFtXF9QD68aP6p4=
+go.opentelemetry.io/otel/sdk v1.19.0/go.mod h1:NedEbbS4w3C6zElbLdPJKOpJQOrGUJ+GfzpjUvI0v1A=
 go.opentelemetry.io/otel/trace v1.19.0 h1:DFVQmlVbfVeOuBRrwdtaehRrWiL1JoVs9CPIQ1Dzxpg=
 go.opentelemetry.io/otel/trace v1.19.0/go.mod h1:mfaSyvGyEJEI0nyV2I4qhNQnbBOUUmYZpYojqMnX2vo=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=

vendor/github.com/felixge/httpsnoop/.travis.yml

@@ -0,0 +1,6 @@
+language: go
+
+go:
+  - 1.6
+  - 1.7
+  - 1.8

vendor/github.com/felixge/httpsnoop/LICENSE.txt

@@ -0,0 +1,19 @@
+Copyright (c) 2016 Felix Geisendörfer (felix@debuggable.com)
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.

vendor/github.com/felixge/httpsnoop/Makefile

@@ -0,0 +1,10 @@
+.PHONY: ci generate clean
+
+ci: clean generate
+	go test -v ./...
+
+generate:
+	go generate .
+
+clean:
+	rm -rf *_generated*.go

vendor/github.com/felixge/httpsnoop/README.md

@@ -0,0 +1,95 @@
+# httpsnoop
+
+Package httpsnoop provides an easy way to capture http related metrics (i.e.
+response time, bytes written, and http status code) from your application's
+http.Handlers.
+
+Doing this requires non-trivial wrapping of the http.ResponseWriter interface,
+which is also exposed for users interested in a more low-level API.
+
+[![GoDoc](https://godoc.org/github.com/felixge/httpsnoop?status.svg)](https://godoc.org/github.com/felixge/httpsnoop)
+[![Build Status](https://travis-ci.org/felixge/httpsnoop.svg?branch=master)](https://travis-ci.org/felixge/httpsnoop)
+
+## Usage Example
+
+```go
+// myH is your app's http handler, perhaps a http.ServeMux or similar.
+var myH http.Handler
+// wrappedH wraps myH in order to log every request.
+wrappedH := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	m := httpsnoop.CaptureMetrics(myH, w, r)
+	log.Printf(
+		"%s %s (code=%d dt=%s written=%d)",
+		r.Method,
+		r.URL,
+		m.Code,
+		m.Duration,
+		m.Written,
+	)
+})
+http.ListenAndServe(":8080", wrappedH)
+```
+
+## Why this package exists
+
+Instrumenting an application's http.Handler is surprisingly difficult.
+
+However if you google for e.g. "capture ResponseWriter status code" you'll find
+lots of advise and code examples that suggest it to be a fairly trivial
+undertaking. Unfortunately everything I've seen so far has a high chance of
+breaking your application.
+
+The main problem is that a `http.ResponseWriter` often implements additional
+interfaces such as `http.Flusher`, `http.CloseNotifier`, `http.Hijacker`, `http.Pusher`, and
+`io.ReaderFrom`. So the naive approach of just wrapping `http.ResponseWriter`
+in your own struct that also implements the `http.ResponseWriter` interface
+will hide the additional interfaces mentioned above. This has a high change of
+introducing subtle bugs into any non-trivial application.
+
+Another approach I've seen people take is to return a struct that implements
+all of the interfaces above. However, that's also problematic, because it's
+difficult to fake some of these interfaces behaviors when the underlying
+`http.ResponseWriter` doesn't have an implementation. It's also dangerous,
+because an application may choose to operate differently, merely because it
+detects the presence of these additional interfaces.
+
+This package solves this problem by checking which additional interfaces a
+`http.ResponseWriter` implements, returning a wrapped version implementing the
+exact same set of interfaces.
+
+Additionally this package properly handles edge cases such as `WriteHeader` not
+being called, or called more than once, as well as concurrent calls to
+`http.ResponseWriter` methods, and even calls happening after the wrapped
+`ServeHTTP` has already returned.
+
+Unfortunately this package is not perfect either. It's possible that it is
+still missing some interfaces provided by the go core (let me know if you find
+one), and it won't work for applications adding their own interfaces into the
+mix. You can however use `httpsnoop.Unwrap(w)` to access the underlying
+`http.ResponseWriter` and type-assert the result to its other interfaces.
+
+However, hopefully the explanation above has sufficiently scared you of rolling
+your own solution to this problem. httpsnoop may still break your application,
+but at least it tries to avoid it as much as possible.
+
+Anyway, the real problem here is that smuggling additional interfaces inside
+`http.ResponseWriter` is a problematic design choice, but it probably goes as
+deep as the Go language specification itself. But that's okay, I still prefer
+Go over the alternatives ;).
+
+## Performance
+
+```
+BenchmarkBaseline-8      	   20000	     94912 ns/op
+BenchmarkCaptureMetrics-8	   20000	     95461 ns/op
+```
+
+As you can see, using `CaptureMetrics` on a vanilla http.Handler introduces an
+overhead of ~500 ns per http request on my machine. However, the margin of
+error appears to be larger than that, therefor it should be reasonable to
+assume that the overhead introduced by `CaptureMetrics` is absolutely
+negligible.
+
+## License
+
+MIT

vendor/github.com/felixge/httpsnoop/capture_metrics.go

@@ -0,0 +1,86 @@
+package httpsnoop
+
+import (
+	"io"
+	"net/http"
+	"time"
+)
+
+// Metrics holds metrics captured from CaptureMetrics.
+type Metrics struct {
+	// Code is the first http response code passed to the WriteHeader func of
+	// the ResponseWriter. If no such call is made, a default code of 200 is
+	// assumed instead.
+	Code int
+	// Duration is the time it took to execute the handler.
+	Duration time.Duration
+	// Written is the number of bytes successfully written by the Write or
+	// ReadFrom function of the ResponseWriter. ResponseWriters may also write
+	// data to their underlaying connection directly (e.g. headers), but those
+	// are not tracked. Therefor the number of Written bytes will usually match
+	// the size of the response body.
+	Written int64
+}
+
+// CaptureMetrics wraps the given hnd, executes it with the given w and r, and
+// returns the metrics it captured from it.
+func CaptureMetrics(hnd http.Handler, w http.ResponseWriter, r *http.Request) Metrics {
+	return CaptureMetricsFn(w, func(ww http.ResponseWriter) {
+		hnd.ServeHTTP(ww, r)
+	})
+}
+
+// CaptureMetricsFn wraps w and calls fn with the wrapped w and returns the
+// resulting metrics. This is very similar to CaptureMetrics (which is just
+// sugar on top of this func), but is a more usable interface if your
+// application doesn't use the Go http.Handler interface.
+func CaptureMetricsFn(w http.ResponseWriter, fn func(http.ResponseWriter)) Metrics {
+	m := Metrics{Code: http.StatusOK}
+	m.CaptureMetrics(w, fn)
+	return m
+}
+
+// CaptureMetrics wraps w and calls fn with the wrapped w and updates
+// Metrics m with the resulting metrics. This is similar to CaptureMetricsFn,
+// but allows one to customize starting Metrics object.
+func (m *Metrics) CaptureMetrics(w http.ResponseWriter, fn func(http.ResponseWriter)) {
+	var (
+		start         = time.Now()
+		headerWritten bool
+		hooks         = Hooks{
+			WriteHeader: func(next WriteHeaderFunc) WriteHeaderFunc {
+				return func(code int) {
+					next(code)
+
+					if !headerWritten {
+						m.Code = code
+						headerWritten = true
+					}
+				}
+			},
+
+			Write: func(next WriteFunc) WriteFunc {
+				return func(p []byte) (int, error) {
+					n, err := next(p)
+
+					m.Written += int64(n)
+					headerWritten = true
+					return n, err
+				}
+			},
+
+			ReadFrom: func(next ReadFromFunc) ReadFromFunc {
+				return func(src io.Reader) (int64, error) {
+					n, err := next(src)
+
+					headerWritten = true
+					m.Written += n
+					return n, err
+				}
+			},
+		}
+	)
+
+	fn(Wrap(w, hooks))
+	m.Duration += time.Since(start)
+}

vendor/github.com/felixge/httpsnoop/docs.go

@@ -0,0 +1,10 @@
+// Package httpsnoop provides an easy way to capture http related metrics (i.e.
+// response time, bytes written, and http status code) from your application's
+// http.Handlers.
+//
+// Doing this requires non-trivial wrapping of the http.ResponseWriter
+// interface, which is also exposed for users interested in a more low-level
+// API.
+package httpsnoop
+
+//go:generate go run codegen/main.go

vendor/github.com/felixge/httpsnoop/wrap_generated_gteq_1.8.go

@@ -0,0 +1,436 @@
+// +build go1.8
+// Code generated by "httpsnoop/codegen"; DO NOT EDIT
+
+package httpsnoop
+
+import (
+	"bufio"
+	"io"
+	"net"
+	"net/http"
+)
+
+// HeaderFunc is part of the http.ResponseWriter interface.
+type HeaderFunc func() http.Header
+
+// WriteHeaderFunc is part of the http.ResponseWriter interface.
+type WriteHeaderFunc func(code int)
+
+// WriteFunc is part of the http.ResponseWriter interface.
+type WriteFunc func(b []byte) (int, error)
+
+// FlushFunc is part of the http.Flusher interface.
+type FlushFunc func()
+
+// CloseNotifyFunc is part of the http.CloseNotifier interface.
+type CloseNotifyFunc func() <-chan bool
+
+// HijackFunc is part of the http.Hijacker interface.
+type HijackFunc func() (net.Conn, *bufio.ReadWriter, error)
+
+// ReadFromFunc is part of the io.ReaderFrom interface.
+type ReadFromFunc func(src io.Reader) (int64, error)
+
+// PushFunc is part of the http.Pusher interface.
+type PushFunc func(target string, opts *http.PushOptions) error
+
+// Hooks defines a set of method interceptors for methods included in
+// http.ResponseWriter as well as some others. You can think of them as
+// middleware for the function calls they target. See Wrap for more details.
+type Hooks struct {
+	Header      func(HeaderFunc) HeaderFunc
+	WriteHeader func(WriteHeaderFunc) WriteHeaderFunc
+	Write       func(WriteFunc) WriteFunc
+	Flush       func(FlushFunc) FlushFunc
+	CloseNotify func(CloseNotifyFunc) CloseNotifyFunc
+	Hijack      func(HijackFunc) HijackFunc
+	ReadFrom    func(ReadFromFunc) ReadFromFunc
+	Push        func(PushFunc) PushFunc
+}
+
+// Wrap returns a wrapped version of w that provides the exact same interface
+// as w. Specifically if w implements any combination of:
+//
+// - http.Flusher
+// - http.CloseNotifier
+// - http.Hijacker
+// - io.ReaderFrom
+// - http.Pusher
+//
+// The wrapped version will implement the exact same combination. If no hooks
+// are set, the wrapped version also behaves exactly as w. Hooks targeting
+// methods not supported by w are ignored. Any other hooks will intercept the
+// method they target and may modify the call's arguments and/or return values.
+// The CaptureMetrics implementation serves as a working example for how the
+// hooks can be used.
+func Wrap(w http.ResponseWriter, hooks Hooks) http.ResponseWriter {
+	rw := &rw{w: w, h: hooks}
+	_, i0 := w.(http.Flusher)
+	_, i1 := w.(http.CloseNotifier)
+	_, i2 := w.(http.Hijacker)
+	_, i3 := w.(io.ReaderFrom)
+	_, i4 := w.(http.Pusher)
+	switch {
+	// combination 1/32
+	case !i0 && !i1 && !i2 && !i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+		}{rw, rw}
+	// combination 2/32
+	case !i0 && !i1 && !i2 && !i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Pusher
+		}{rw, rw, rw}
+	// combination 3/32
+	case !i0 && !i1 && !i2 && i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			io.ReaderFrom
+		}{rw, rw, rw}
+	// combination 4/32
+	case !i0 && !i1 && !i2 && i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			io.ReaderFrom
+			http.Pusher
+		}{rw, rw, rw, rw}
+	// combination 5/32
+	case !i0 && !i1 && i2 && !i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Hijacker
+		}{rw, rw, rw}
+	// combination 6/32
+	case !i0 && !i1 && i2 && !i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Hijacker
+			http.Pusher
+		}{rw, rw, rw, rw}
+	// combination 7/32
+	case !i0 && !i1 && i2 && i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Hijacker
+			io.ReaderFrom
+		}{rw, rw, rw, rw}
+	// combination 8/32
+	case !i0 && !i1 && i2 && i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Hijacker
+			io.ReaderFrom
+			http.Pusher
+		}{rw, rw, rw, rw, rw}
+	// combination 9/32
+	case !i0 && i1 && !i2 && !i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+		}{rw, rw, rw}
+	// combination 10/32
+	case !i0 && i1 && !i2 && !i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+			http.Pusher
+		}{rw, rw, rw, rw}
+	// combination 11/32
+	case !i0 && i1 && !i2 && i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+			io.ReaderFrom
+		}{rw, rw, rw, rw}
+	// combination 12/32
+	case !i0 && i1 && !i2 && i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+			io.ReaderFrom
+			http.Pusher
+		}{rw, rw, rw, rw, rw}
+	// combination 13/32
+	case !i0 && i1 && i2 && !i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+			http.Hijacker
+		}{rw, rw, rw, rw}
+	// combination 14/32
+	case !i0 && i1 && i2 && !i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+			http.Hijacker
+			http.Pusher
+		}{rw, rw, rw, rw, rw}
+	// combination 15/32
+	case !i0 && i1 && i2 && i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+			http.Hijacker
+			io.ReaderFrom
+		}{rw, rw, rw, rw, rw}
+	// combination 16/32
+	case !i0 && i1 && i2 && i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+			http.Hijacker
+			io.ReaderFrom
+			http.Pusher
+		}{rw, rw, rw, rw, rw, rw}
+	// combination 17/32
+	case i0 && !i1 && !i2 && !i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+		}{rw, rw, rw}
+	// combination 18/32
+	case i0 && !i1 && !i2 && !i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.Pusher
+		}{rw, rw, rw, rw}
+	// combination 19/32
+	case i0 && !i1 && !i2 && i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			io.ReaderFrom
+		}{rw, rw, rw, rw}
+	// combination 20/32
+	case i0 && !i1 && !i2 && i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			io.ReaderFrom
+			http.Pusher
+		}{rw, rw, rw, rw, rw}
+	// combination 21/32
+	case i0 && !i1 && i2 && !i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.Hijacker
+		}{rw, rw, rw, rw}
+	// combination 22/32
+	case i0 && !i1 && i2 && !i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.Hijacker
+			http.Pusher
+		}{rw, rw, rw, rw, rw}
+	// combination 23/32
+	case i0 && !i1 && i2 && i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.Hijacker
+			io.ReaderFrom
+		}{rw, rw, rw, rw, rw}
+	// combination 24/32
+	case i0 && !i1 && i2 && i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.Hijacker
+			io.ReaderFrom
+			http.Pusher
+		}{rw, rw, rw, rw, rw, rw}
+	// combination 25/32
+	case i0 && i1 && !i2 && !i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+		}{rw, rw, rw, rw}
+	// combination 26/32
+	case i0 && i1 && !i2 && !i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+			http.Pusher
+		}{rw, rw, rw, rw, rw}
+	// combination 27/32
+	case i0 && i1 && !i2 && i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+			io.ReaderFrom
+		}{rw, rw, rw, rw, rw}
+	// combination 28/32
+	case i0 && i1 && !i2 && i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+			io.ReaderFrom
+			http.Pusher
+		}{rw, rw, rw, rw, rw, rw}
+	// combination 29/32
+	case i0 && i1 && i2 && !i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+			http.Hijacker
+		}{rw, rw, rw, rw, rw}
+	// combination 30/32
+	case i0 && i1 && i2 && !i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+			http.Hijacker
+			http.Pusher
+		}{rw, rw, rw, rw, rw, rw}
+	// combination 31/32
+	case i0 && i1 && i2 && i3 && !i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+			http.Hijacker
+			io.ReaderFrom
+		}{rw, rw, rw, rw, rw, rw}
+	// combination 32/32
+	case i0 && i1 && i2 && i3 && i4:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+			http.Hijacker
+			io.ReaderFrom
+			http.Pusher
+		}{rw, rw, rw, rw, rw, rw, rw}
+	}
+	panic("unreachable")
+}
+
+type rw struct {
+	w http.ResponseWriter
+	h Hooks
+}
+
+func (w *rw) Unwrap() http.ResponseWriter {
+	return w.w
+}
+
+func (w *rw) Header() http.Header {
+	f := w.w.(http.ResponseWriter).Header
+	if w.h.Header != nil {
+		f = w.h.Header(f)
+	}
+	return f()
+}
+
+func (w *rw) WriteHeader(code int) {
+	f := w.w.(http.ResponseWriter).WriteHeader
+	if w.h.WriteHeader != nil {
+		f = w.h.WriteHeader(f)
+	}
+	f(code)
+}
+
+func (w *rw) Write(b []byte) (int, error) {
+	f := w.w.(http.ResponseWriter).Write
+	if w.h.Write != nil {
+		f = w.h.Write(f)
+	}
+	return f(b)
+}
+
+func (w *rw) Flush() {
+	f := w.w.(http.Flusher).Flush
+	if w.h.Flush != nil {
+		f = w.h.Flush(f)
+	}
+	f()
+}
+
+func (w *rw) CloseNotify() <-chan bool {
+	f := w.w.(http.CloseNotifier).CloseNotify
+	if w.h.CloseNotify != nil {
+		f = w.h.CloseNotify(f)
+	}
+	return f()
+}
+
+func (w *rw) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	f := w.w.(http.Hijacker).Hijack
+	if w.h.Hijack != nil {
+		f = w.h.Hijack(f)
+	}
+	return f()
+}
+
+func (w *rw) ReadFrom(src io.Reader) (int64, error) {
+	f := w.w.(io.ReaderFrom).ReadFrom
+	if w.h.ReadFrom != nil {
+		f = w.h.ReadFrom(f)
+	}
+	return f(src)
+}
+
+func (w *rw) Push(target string, opts *http.PushOptions) error {
+	f := w.w.(http.Pusher).Push
+	if w.h.Push != nil {
+		f = w.h.Push(f)
+	}
+	return f(target, opts)
+}
+
+type Unwrapper interface {
+	Unwrap() http.ResponseWriter
+}
+
+// Unwrap returns the underlying http.ResponseWriter from within zero or more
+// layers of httpsnoop wrappers.
+func Unwrap(w http.ResponseWriter) http.ResponseWriter {
+	if rw, ok := w.(Unwrapper); ok {
+		// recurse until rw.Unwrap() returns a non-Unwrapper
+		return Unwrap(rw.Unwrap())
+	} else {
+		return w
+	}
+}

vendor/github.com/felixge/httpsnoop/wrap_generated_lt_1.8.go

@@ -0,0 +1,278 @@
+// +build !go1.8
+// Code generated by "httpsnoop/codegen"; DO NOT EDIT
+
+package httpsnoop
+
+import (
+	"bufio"
+	"io"
+	"net"
+	"net/http"
+)
+
+// HeaderFunc is part of the http.ResponseWriter interface.
+type HeaderFunc func() http.Header
+
+// WriteHeaderFunc is part of the http.ResponseWriter interface.
+type WriteHeaderFunc func(code int)
+
+// WriteFunc is part of the http.ResponseWriter interface.
+type WriteFunc func(b []byte) (int, error)
+
+// FlushFunc is part of the http.Flusher interface.
+type FlushFunc func()
+
+// CloseNotifyFunc is part of the http.CloseNotifier interface.
+type CloseNotifyFunc func() <-chan bool
+
+// HijackFunc is part of the http.Hijacker interface.
+type HijackFunc func() (net.Conn, *bufio.ReadWriter, error)
+
+// ReadFromFunc is part of the io.ReaderFrom interface.
+type ReadFromFunc func(src io.Reader) (int64, error)
+
+// Hooks defines a set of method interceptors for methods included in
+// http.ResponseWriter as well as some others. You can think of them as
+// middleware for the function calls they target. See Wrap for more details.
+type Hooks struct {
+	Header      func(HeaderFunc) HeaderFunc
+	WriteHeader func(WriteHeaderFunc) WriteHeaderFunc
+	Write       func(WriteFunc) WriteFunc
+	Flush       func(FlushFunc) FlushFunc
+	CloseNotify func(CloseNotifyFunc) CloseNotifyFunc
+	Hijack      func(HijackFunc) HijackFunc
+	ReadFrom    func(ReadFromFunc) ReadFromFunc
+}
+
+// Wrap returns a wrapped version of w that provides the exact same interface
+// as w. Specifically if w implements any combination of:
+//
+// - http.Flusher
+// - http.CloseNotifier
+// - http.Hijacker
+// - io.ReaderFrom
+//
+// The wrapped version will implement the exact same combination. If no hooks
+// are set, the wrapped version also behaves exactly as w. Hooks targeting
+// methods not supported by w are ignored. Any other hooks will intercept the
+// method they target and may modify the call's arguments and/or return values.
+// The CaptureMetrics implementation serves as a working example for how the
+// hooks can be used.
+func Wrap(w http.ResponseWriter, hooks Hooks) http.ResponseWriter {
+	rw := &rw{w: w, h: hooks}
+	_, i0 := w.(http.Flusher)
+	_, i1 := w.(http.CloseNotifier)
+	_, i2 := w.(http.Hijacker)
+	_, i3 := w.(io.ReaderFrom)
+	switch {
+	// combination 1/16
+	case !i0 && !i1 && !i2 && !i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+		}{rw, rw}
+	// combination 2/16
+	case !i0 && !i1 && !i2 && i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			io.ReaderFrom
+		}{rw, rw, rw}
+	// combination 3/16
+	case !i0 && !i1 && i2 && !i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Hijacker
+		}{rw, rw, rw}
+	// combination 4/16
+	case !i0 && !i1 && i2 && i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Hijacker
+			io.ReaderFrom
+		}{rw, rw, rw, rw}
+	// combination 5/16
+	case !i0 && i1 && !i2 && !i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+		}{rw, rw, rw}
+	// combination 6/16
+	case !i0 && i1 && !i2 && i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+			io.ReaderFrom
+		}{rw, rw, rw, rw}
+	// combination 7/16
+	case !i0 && i1 && i2 && !i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+			http.Hijacker
+		}{rw, rw, rw, rw}
+	// combination 8/16
+	case !i0 && i1 && i2 && i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.CloseNotifier
+			http.Hijacker
+			io.ReaderFrom
+		}{rw, rw, rw, rw, rw}
+	// combination 9/16
+	case i0 && !i1 && !i2 && !i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+		}{rw, rw, rw}
+	// combination 10/16
+	case i0 && !i1 && !i2 && i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			io.ReaderFrom
+		}{rw, rw, rw, rw}
+	// combination 11/16
+	case i0 && !i1 && i2 && !i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.Hijacker
+		}{rw, rw, rw, rw}
+	// combination 12/16
+	case i0 && !i1 && i2 && i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.Hijacker
+			io.ReaderFrom
+		}{rw, rw, rw, rw, rw}
+	// combination 13/16
+	case i0 && i1 && !i2 && !i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+		}{rw, rw, rw, rw}
+	// combination 14/16
+	case i0 && i1 && !i2 && i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+			io.ReaderFrom
+		}{rw, rw, rw, rw, rw}
+	// combination 15/16
+	case i0 && i1 && i2 && !i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+			http.Hijacker
+		}{rw, rw, rw, rw, rw}
+	// combination 16/16
+	case i0 && i1 && i2 && i3:
+		return struct {
+			Unwrapper
+			http.ResponseWriter
+			http.Flusher
+			http.CloseNotifier
+			http.Hijacker
+			io.ReaderFrom
+		}{rw, rw, rw, rw, rw, rw}
+	}
+	panic("unreachable")
+}
+
+type rw struct {
+	w http.ResponseWriter
+	h Hooks
+}
+
+func (w *rw) Unwrap() http.ResponseWriter {
+	return w.w
+}
+
+func (w *rw) Header() http.Header {
+	f := w.w.(http.ResponseWriter).Header
+	if w.h.Header != nil {
+		f = w.h.Header(f)
+	}
+	return f()
+}
+
+func (w *rw) WriteHeader(code int) {
+	f := w.w.(http.ResponseWriter).WriteHeader
+	if w.h.WriteHeader != nil {
+		f = w.h.WriteHeader(f)
+	}
+	f(code)
+}
+
+func (w *rw) Write(b []byte) (int, error) {
+	f := w.w.(http.ResponseWriter).Write
+	if w.h.Write != nil {
+		f = w.h.Write(f)
+	}
+	return f(b)
+}
+
+func (w *rw) Flush() {
+	f := w.w.(http.Flusher).Flush
+	if w.h.Flush != nil {
+		f = w.h.Flush(f)
+	}
+	f()
+}
+
+func (w *rw) CloseNotify() <-chan bool {
+	f := w.w.(http.CloseNotifier).CloseNotify
+	if w.h.CloseNotify != nil {
+		f = w.h.CloseNotify(f)
+	}
+	return f()
+}
+
+func (w *rw) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	f := w.w.(http.Hijacker).Hijack
+	if w.h.Hijack != nil {
+		f = w.h.Hijack(f)
+	}
+	return f()
+}
+
+func (w *rw) ReadFrom(src io.Reader) (int64, error) {
+	f := w.w.(io.ReaderFrom).ReadFrom
+	if w.h.ReadFrom != nil {
+		f = w.h.ReadFrom(f)
+	}
+	return f(src)
+}
+
+type Unwrapper interface {
+	Unwrap() http.ResponseWriter
+}
+
+// Unwrap returns the underlying http.ResponseWriter from within zero or more
+// layers of httpsnoop wrappers.
+func Unwrap(w http.ResponseWriter) http.ResponseWriter {
+	if rw, ok := w.(Unwrapper); ok {
+		// recurse until rw.Unwrap() returns a non-Unwrapper
+		return Unwrap(rw.Unwrap())
+	} else {
+		return w
+	}
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/LICENSE.txt

@@ -0,0 +1,27 @@
+Copyright (c) 2015, Gengo, Inc.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+
+    * Neither the name of Gengo, Inc. nor the names of its
+      contributors may be used to endorse or promote products derived from this
+      software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/internal/httprule/BUILD.bazel

@@ -0,0 +1,35 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+package(default_visibility = ["//visibility:public"])
+
+go_library(
+    name = "httprule",
+    srcs = [
+        "compile.go",
+        "parse.go",
+        "types.go",
+    ],
+    importpath = "github.com/grpc-ecosystem/grpc-gateway/v2/internal/httprule",
+    deps = ["//utilities"],
+)
+
+go_test(
+    name = "httprule_test",
+    size = "small",
+    srcs = [
+        "compile_test.go",
+        "parse_test.go",
+        "types_test.go",
+    ],
+    embed = [":httprule"],
+    deps = [
+        "//utilities",
+        "@com_github_golang_glog//:glog",
+    ],
+)
+
+alias(
+    name = "go_default_library",
+    actual = ":httprule",
+    visibility = ["//:__subpackages__"],
+)

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/internal/httprule/compile.go

@@ -0,0 +1,121 @@
+package httprule
+
+import (
+	"github.com/grpc-ecosystem/grpc-gateway/v2/utilities"
+)
+
+const (
+	opcodeVersion = 1
+)
+
+// Template is a compiled representation of path templates.
+type Template struct {
+	// Version is the version number of the format.
+	Version int
+	// OpCodes is a sequence of operations.
+	OpCodes []int
+	// Pool is a constant pool
+	Pool []string
+	// Verb is a VERB part in the template.
+	Verb string
+	// Fields is a list of field paths bound in this template.
+	Fields []string
+	// Original template (example: /v1/a_bit_of_everything)
+	Template string
+}
+
+// Compiler compiles utilities representation of path templates into marshallable operations.
+// They can be unmarshalled by runtime.NewPattern.
+type Compiler interface {
+	Compile() Template
+}
+
+type op struct {
+	// code is the opcode of the operation
+	code utilities.OpCode
+
+	// str is a string operand of the code.
+	// num is ignored if str is not empty.
+	str string
+
+	// num is a numeric operand of the code.
+	num int
+}
+
+func (w wildcard) compile() []op {
+	return []op{
+		{code: utilities.OpPush},
+	}
+}
+
+func (w deepWildcard) compile() []op {
+	return []op{
+		{code: utilities.OpPushM},
+	}
+}
+
+func (l literal) compile() []op {
+	return []op{
+		{
+			code: utilities.OpLitPush,
+			str:  string(l),
+		},
+	}
+}
+
+func (v variable) compile() []op {
+	var ops []op
+	for _, s := range v.segments {
+		ops = append(ops, s.compile()...)
+	}
+	ops = append(ops, op{
+		code: utilities.OpConcatN,
+		num:  len(v.segments),
+	}, op{
+		code: utilities.OpCapture,
+		str:  v.path,
+	})
+
+	return ops
+}
+
+func (t template) Compile() Template {
+	var rawOps []op
+	for _, s := range t.segments {
+		rawOps = append(rawOps, s.compile()...)
+	}
+
+	var (
+		ops    []int
+		pool   []string
+		fields []string
+	)
+	consts := make(map[string]int)
+	for _, op := range rawOps {
+		ops = append(ops, int(op.code))
+		if op.str == "" {
+			ops = append(ops, op.num)
+		} else {
+			// eof segment literal represents the "/" path pattern
+			if op.str == eof {
+				op.str = ""
+			}
+			if _, ok := consts[op.str]; !ok {
+				consts[op.str] = len(pool)
+				pool = append(pool, op.str)
+			}
+			ops = append(ops, consts[op.str])
+		}
+		if op.code == utilities.OpCapture {
+			fields = append(fields, op.str)
+		}
+	}
+	return Template{
+		Version:  opcodeVersion,
+		OpCodes:  ops,
+		Pool:     pool,
+		Verb:     t.verb,
+		Fields:   fields,
+		Template: t.template,
+	}
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/internal/httprule/fuzz.go

@@ -0,0 +1,11 @@
+//go:build gofuzz
+// +build gofuzz
+
+package httprule
+
+func Fuzz(data []byte) int {
+	if _, err := Parse(string(data)); err != nil {
+		return 0
+	}
+	return 0
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/internal/httprule/parse.go

@@ -0,0 +1,368 @@
+package httprule
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+// InvalidTemplateError indicates that the path template is not valid.
+type InvalidTemplateError struct {
+	tmpl string
+	msg  string
+}
+
+func (e InvalidTemplateError) Error() string {
+	return fmt.Sprintf("%s: %s", e.msg, e.tmpl)
+}
+
+// Parse parses the string representation of path template
+func Parse(tmpl string) (Compiler, error) {
+	if !strings.HasPrefix(tmpl, "/") {
+		return template{}, InvalidTemplateError{tmpl: tmpl, msg: "no leading /"}
+	}
+	tokens, verb := tokenize(tmpl[1:])
+
+	p := parser{tokens: tokens}
+	segs, err := p.topLevelSegments()
+	if err != nil {
+		return template{}, InvalidTemplateError{tmpl: tmpl, msg: err.Error()}
+	}
+
+	return template{
+		segments: segs,
+		verb:     verb,
+		template: tmpl,
+	}, nil
+}
+
+func tokenize(path string) (tokens []string, verb string) {
+	if path == "" {
+		return []string{eof}, ""
+	}
+
+	const (
+		init = iota
+		field
+		nested
+	)
+	st := init
+	for path != "" {
+		var idx int
+		switch st {
+		case init:
+			idx = strings.IndexAny(path, "/{")
+		case field:
+			idx = strings.IndexAny(path, ".=}")
+		case nested:
+			idx = strings.IndexAny(path, "/}")
+		}
+		if idx < 0 {
+			tokens = append(tokens, path)
+			break
+		}
+		switch r := path[idx]; r {
+		case '/', '.':
+		case '{':
+			st = field
+		case '=':
+			st = nested
+		case '}':
+			st = init
+		}
+		if idx == 0 {
+			tokens = append(tokens, path[idx:idx+1])
+		} else {
+			tokens = append(tokens, path[:idx], path[idx:idx+1])
+		}
+		path = path[idx+1:]
+	}
+
+	l := len(tokens)
+	// See
+	// https://github.com/grpc-ecosystem/grpc-gateway/pull/1947#issuecomment-774523693 ;
+	// although normal and backwards-compat logic here is to use the last index
+	// of a colon, if the final segment is a variable followed by a colon, the
+	// part following the colon must be a verb. Hence if the previous token is
+	// an end var marker, we switch the index we're looking for to Index instead
+	// of LastIndex, so that we correctly grab the remaining part of the path as
+	// the verb.
+	var penultimateTokenIsEndVar bool
+	switch l {
+	case 0, 1:
+		// Not enough to be variable so skip this logic and don't result in an
+		// invalid index
+	default:
+		penultimateTokenIsEndVar = tokens[l-2] == "}"
+	}
+	t := tokens[l-1]
+	var idx int
+	if penultimateTokenIsEndVar {
+		idx = strings.Index(t, ":")
+	} else {
+		idx = strings.LastIndex(t, ":")
+	}
+	if idx == 0 {
+		tokens, verb = tokens[:l-1], t[1:]
+	} else if idx > 0 {
+		tokens[l-1], verb = t[:idx], t[idx+1:]
+	}
+	tokens = append(tokens, eof)
+	return tokens, verb
+}
+
+// parser is a parser of the template syntax defined in github.com/googleapis/googleapis/google/api/http.proto.
+type parser struct {
+	tokens   []string
+	accepted []string
+}
+
+// topLevelSegments is the target of this parser.
+func (p *parser) topLevelSegments() ([]segment, error) {
+	if _, err := p.accept(typeEOF); err == nil {
+		p.tokens = p.tokens[:0]
+		return []segment{literal(eof)}, nil
+	}
+	segs, err := p.segments()
+	if err != nil {
+		return nil, err
+	}
+	if _, err := p.accept(typeEOF); err != nil {
+		return nil, fmt.Errorf("unexpected token %q after segments %q", p.tokens[0], strings.Join(p.accepted, ""))
+	}
+	return segs, nil
+}
+
+func (p *parser) segments() ([]segment, error) {
+	s, err := p.segment()
+	if err != nil {
+		return nil, err
+	}
+
+	segs := []segment{s}
+	for {
+		if _, err := p.accept("/"); err != nil {
+			return segs, nil
+		}
+		s, err := p.segment()
+		if err != nil {
+			return segs, err
+		}
+		segs = append(segs, s)
+	}
+}
+
+func (p *parser) segment() (segment, error) {
+	if _, err := p.accept("*"); err == nil {
+		return wildcard{}, nil
+	}
+	if _, err := p.accept("**"); err == nil {
+		return deepWildcard{}, nil
+	}
+	if l, err := p.literal(); err == nil {
+		return l, nil
+	}
+
+	v, err := p.variable()
+	if err != nil {
+		return nil, fmt.Errorf("segment neither wildcards, literal or variable: %w", err)
+	}
+	return v, nil
+}
+
+func (p *parser) literal() (segment, error) {
+	lit, err := p.accept(typeLiteral)
+	if err != nil {
+		return nil, err
+	}
+	return literal(lit), nil
+}
+
+func (p *parser) variable() (segment, error) {
+	if _, err := p.accept("{"); err != nil {
+		return nil, err
+	}
+
+	path, err := p.fieldPath()
+	if err != nil {
+		return nil, err
+	}
+
+	var segs []segment
+	if _, err := p.accept("="); err == nil {
+		segs, err = p.segments()
+		if err != nil {
+			return nil, fmt.Errorf("invalid segment in variable %q: %w", path, err)
+		}
+	} else {
+		segs = []segment{wildcard{}}
+	}
+
+	if _, err := p.accept("}"); err != nil {
+		return nil, fmt.Errorf("unterminated variable segment: %s", path)
+	}
+	return variable{
+		path:     path,
+		segments: segs,
+	}, nil
+}
+
+func (p *parser) fieldPath() (string, error) {
+	c, err := p.accept(typeIdent)
+	if err != nil {
+		return "", err
+	}
+	components := []string{c}
+	for {
+		if _, err := p.accept("."); err != nil {
+			return strings.Join(components, "."), nil
+		}
+		c, err := p.accept(typeIdent)
+		if err != nil {
+			return "", fmt.Errorf("invalid field path component: %w", err)
+		}
+		components = append(components, c)
+	}
+}
+
+// A termType is a type of terminal symbols.
+type termType string
+
+// These constants define some of valid values of termType.
+// They improve readability of parse functions.
+//
+// You can also use "/", "*", "**", "." or "=" as valid values.
+const (
+	typeIdent   = termType("ident")
+	typeLiteral = termType("literal")
+	typeEOF     = termType("$")
+)
+
+// eof is the terminal symbol which always appears at the end of token sequence.
+const eof = "\u0000"
+
+// accept tries to accept a token in "p".
+// This function consumes a token and returns it if it matches to the specified "term".
+// If it doesn't match, the function does not consume any tokens and return an error.
+func (p *parser) accept(term termType) (string, error) {
+	t := p.tokens[0]
+	switch term {
+	case "/", "*", "**", ".", "=", "{", "}":
+		if t != string(term) && t != "/" {
+			return "", fmt.Errorf("expected %q but got %q", term, t)
+		}
+	case typeEOF:
+		if t != eof {
+			return "", fmt.Errorf("expected EOF but got %q", t)
+		}
+	case typeIdent:
+		if err := expectIdent(t); err != nil {
+			return "", err
+		}
+	case typeLiteral:
+		if err := expectPChars(t); err != nil {
+			return "", err
+		}
+	default:
+		return "", fmt.Errorf("unknown termType %q", term)
+	}
+	p.tokens = p.tokens[1:]
+	p.accepted = append(p.accepted, t)
+	return t, nil
+}
+
+// expectPChars determines if "t" consists of only pchars defined in RFC3986.
+//
+// https://www.ietf.org/rfc/rfc3986.txt, P.49
+//
+//	pchar         = unreserved / pct-encoded / sub-delims / ":" / "@"
+//	unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"
+//	sub-delims    = "!" / "$" / "&" / "'" / "(" / ")"
+//	              / "*" / "+" / "," / ";" / "="
+//	pct-encoded   = "%" HEXDIG HEXDIG
+func expectPChars(t string) error {
+	const (
+		init = iota
+		pct1
+		pct2
+	)
+	st := init
+	for _, r := range t {
+		if st != init {
+			if !isHexDigit(r) {
+				return fmt.Errorf("invalid hexdigit: %c(%U)", r, r)
+			}
+			switch st {
+			case pct1:
+				st = pct2
+			case pct2:
+				st = init
+			}
+			continue
+		}
+
+		// unreserved
+		switch {
+		case 'A' <= r && r <= 'Z':
+			continue
+		case 'a' <= r && r <= 'z':
+			continue
+		case '0' <= r && r <= '9':
+			continue
+		}
+		switch r {
+		case '-', '.', '_', '~':
+			// unreserved
+		case '!', '$', '&', '\'', '(', ')', '*', '+', ',', ';', '=':
+			// sub-delims
+		case ':', '@':
+			// rest of pchar
+		case '%':
+			// pct-encoded
+			st = pct1
+		default:
+			return fmt.Errorf("invalid character in path segment: %q(%U)", r, r)
+		}
+	}
+	if st != init {
+		return fmt.Errorf("invalid percent-encoding in %q", t)
+	}
+	return nil
+}
+
+// expectIdent determines if "ident" is a valid identifier in .proto schema ([[:alpha:]_][[:alphanum:]_]*).
+func expectIdent(ident string) error {
+	if ident == "" {
+		return errors.New("empty identifier")
+	}
+	for pos, r := range ident {
+		switch {
+		case '0' <= r && r <= '9':
+			if pos == 0 {
+				return fmt.Errorf("identifier starting with digit: %s", ident)
+			}
+			continue
+		case 'A' <= r && r <= 'Z':
+			continue
+		case 'a' <= r && r <= 'z':
+			continue
+		case r == '_':
+			continue
+		default:
+			return fmt.Errorf("invalid character %q(%U) in identifier: %s", r, r, ident)
+		}
+	}
+	return nil
+}
+
+func isHexDigit(r rune) bool {
+	switch {
+	case '0' <= r && r <= '9':
+		return true
+	case 'A' <= r && r <= 'F':
+		return true
+	case 'a' <= r && r <= 'f':
+		return true
+	}
+	return false
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/internal/httprule/types.go

@@ -0,0 +1,60 @@
+package httprule
+
+import (
+	"fmt"
+	"strings"
+)
+
+type template struct {
+	segments []segment
+	verb     string
+	template string
+}
+
+type segment interface {
+	fmt.Stringer
+	compile() (ops []op)
+}
+
+type wildcard struct{}
+
+type deepWildcard struct{}
+
+type literal string
+
+type variable struct {
+	path     string
+	segments []segment
+}
+
+func (wildcard) String() string {
+	return "*"
+}
+
+func (deepWildcard) String() string {
+	return "**"
+}
+
+func (l literal) String() string {
+	return string(l)
+}
+
+func (v variable) String() string {
+	var segs []string
+	for _, s := range v.segments {
+		segs = append(segs, s.String())
+	}
+	return fmt.Sprintf("{%s=%s}", v.path, strings.Join(segs, "/"))
+}
+
+func (t template) String() string {
+	var segs []string
+	for _, s := range t.segments {
+		segs = append(segs, s.String())
+	}
+	str := strings.Join(segs, "/")
+	if t.verb != "" {
+		str = fmt.Sprintf("%s:%s", str, t.verb)
+	}
+	return "/" + str
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/BUILD.bazel

@@ -0,0 +1,97 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+package(default_visibility = ["//visibility:public"])
+
+go_library(
+    name = "runtime",
+    srcs = [
+        "context.go",
+        "convert.go",
+        "doc.go",
+        "errors.go",
+        "fieldmask.go",
+        "handler.go",
+        "marshal_httpbodyproto.go",
+        "marshal_json.go",
+        "marshal_jsonpb.go",
+        "marshal_proto.go",
+        "marshaler.go",
+        "marshaler_registry.go",
+        "mux.go",
+        "pattern.go",
+        "proto2_convert.go",
+        "query.go",
+    ],
+    importpath = "github.com/grpc-ecosystem/grpc-gateway/v2/runtime",
+    deps = [
+        "//internal/httprule",
+        "//utilities",
+        "@go_googleapis//google/api:httpbody_go_proto",
+        "@org_golang_google_grpc//codes",
+        "@org_golang_google_grpc//grpclog",
+        "@org_golang_google_grpc//health/grpc_health_v1",
+        "@org_golang_google_grpc//metadata",
+        "@org_golang_google_grpc//status",
+        "@org_golang_google_protobuf//encoding/protojson",
+        "@org_golang_google_protobuf//proto",
+        "@org_golang_google_protobuf//reflect/protoreflect",
+        "@org_golang_google_protobuf//reflect/protoregistry",
+        "@org_golang_google_protobuf//types/known/durationpb",
+        "@org_golang_google_protobuf//types/known/fieldmaskpb",
+        "@org_golang_google_protobuf//types/known/structpb",
+        "@org_golang_google_protobuf//types/known/timestamppb",
+        "@org_golang_google_protobuf//types/known/wrapperspb",
+    ],
+)
+
+go_test(
+    name = "runtime_test",
+    size = "small",
+    srcs = [
+        "context_test.go",
+        "convert_test.go",
+        "errors_test.go",
+        "fieldmask_test.go",
+        "handler_test.go",
+        "marshal_httpbodyproto_test.go",
+        "marshal_json_test.go",
+        "marshal_jsonpb_test.go",
+        "marshal_proto_test.go",
+        "marshaler_registry_test.go",
+        "mux_internal_test.go",
+        "mux_test.go",
+        "pattern_test.go",
+        "query_fuzz_test.go",
+        "query_test.go",
+    ],
+    embed = [":runtime"],
+    deps = [
+        "//runtime/internal/examplepb",
+        "//utilities",
+        "@com_github_google_go_cmp//cmp",
+        "@com_github_google_go_cmp//cmp/cmpopts",
+        "@go_googleapis//google/api:httpbody_go_proto",
+        "@go_googleapis//google/rpc:errdetails_go_proto",
+        "@go_googleapis//google/rpc:status_go_proto",
+        "@org_golang_google_grpc//:go_default_library",
+        "@org_golang_google_grpc//codes",
+        "@org_golang_google_grpc//health/grpc_health_v1",
+        "@org_golang_google_grpc//metadata",
+        "@org_golang_google_grpc//status",
+        "@org_golang_google_protobuf//encoding/protojson",
+        "@org_golang_google_protobuf//proto",
+        "@org_golang_google_protobuf//testing/protocmp",
+        "@org_golang_google_protobuf//types/known/durationpb",
+        "@org_golang_google_protobuf//types/known/emptypb",
+        "@org_golang_google_protobuf//types/known/fieldmaskpb",
+        "@org_golang_google_protobuf//types/known/structpb",
+        "@org_golang_google_protobuf//types/known/timestamppb",
+        "@org_golang_google_protobuf//types/known/wrapperspb",
+    ],
+)
+
+alias(
+    name = "go_default_library",
+    actual = ":runtime",
+    visibility = ["//visibility:public"],
+)

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/context.go

@@ -0,0 +1,401 @@
+package runtime
+
+import (
+	"context"
+	"encoding/base64"
+	"fmt"
+	"net"
+	"net/http"
+	"net/textproto"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+)
+
+// MetadataHeaderPrefix is the http prefix that represents custom metadata
+// parameters to or from a gRPC call.
+const MetadataHeaderPrefix = "Grpc-Metadata-"
+
+// MetadataPrefix is prepended to permanent HTTP header keys (as specified
+// by the IANA) when added to the gRPC context.
+const MetadataPrefix = "grpcgateway-"
+
+// MetadataTrailerPrefix is prepended to gRPC metadata as it is converted to
+// HTTP headers in a response handled by grpc-gateway
+const MetadataTrailerPrefix = "Grpc-Trailer-"
+
+const metadataGrpcTimeout = "Grpc-Timeout"
+const metadataHeaderBinarySuffix = "-Bin"
+
+const xForwardedFor = "X-Forwarded-For"
+const xForwardedHost = "X-Forwarded-Host"
+
+// DefaultContextTimeout is used for gRPC call context.WithTimeout whenever a Grpc-Timeout inbound
+// header isn't present. If the value is 0 the sent `context` will not have a timeout.
+var DefaultContextTimeout = 0 * time.Second
+
+// malformedHTTPHeaders lists the headers that the gRPC server may reject outright as malformed.
+// See https://github.com/grpc/grpc-go/pull/4803#issuecomment-986093310 for more context.
+var malformedHTTPHeaders = map[string]struct{}{
+	"connection": {},
+}
+
+type (
+	rpcMethodKey       struct{}
+	httpPathPatternKey struct{}
+
+	AnnotateContextOption func(ctx context.Context) context.Context
+)
+
+func WithHTTPPathPattern(pattern string) AnnotateContextOption {
+	return func(ctx context.Context) context.Context {
+		return withHTTPPathPattern(ctx, pattern)
+	}
+}
+
+func decodeBinHeader(v string) ([]byte, error) {
+	if len(v)%4 == 0 {
+		// Input was padded, or padding was not necessary.
+		return base64.StdEncoding.DecodeString(v)
+	}
+	return base64.RawStdEncoding.DecodeString(v)
+}
+
+/*
+AnnotateContext adds context information such as metadata from the request.
+
+At a minimum, the RemoteAddr is included in the fashion of "X-Forwarded-For",
+except that the forwarded destination is not another HTTP service but rather
+a gRPC service.
+*/
+func AnnotateContext(ctx context.Context, mux *ServeMux, req *http.Request, rpcMethodName string, options ...AnnotateContextOption) (context.Context, error) {
+	ctx, md, err := annotateContext(ctx, mux, req, rpcMethodName, options...)
+	if err != nil {
+		return nil, err
+	}
+	if md == nil {
+		return ctx, nil
+	}
+
+	return metadata.NewOutgoingContext(ctx, md), nil
+}
+
+// AnnotateIncomingContext adds context information such as metadata from the request.
+// Attach metadata as incoming context.
+func AnnotateIncomingContext(ctx context.Context, mux *ServeMux, req *http.Request, rpcMethodName string, options ...AnnotateContextOption) (context.Context, error) {
+	ctx, md, err := annotateContext(ctx, mux, req, rpcMethodName, options...)
+	if err != nil {
+		return nil, err
+	}
+	if md == nil {
+		return ctx, nil
+	}
+
+	return metadata.NewIncomingContext(ctx, md), nil
+}
+
+func isValidGRPCMetadataKey(key string) bool {
+	// Must be a valid gRPC "Header-Name" as defined here:
+	//   https://github.com/grpc/grpc/blob/4b05dc88b724214d0c725c8e7442cbc7a61b1374/doc/PROTOCOL-HTTP2.md
+	// This means 0-9 a-z _ - .
+	// Only lowercase letters are valid in the wire protocol, but the client library will normalize
+	// uppercase ASCII to lowercase, so uppercase ASCII is also acceptable.
+	bytes := []byte(key) // gRPC validates strings on the byte level, not Unicode.
+	for _, ch := range bytes {
+		validLowercaseLetter := ch >= 'a' && ch <= 'z'
+		validUppercaseLetter := ch >= 'A' && ch <= 'Z'
+		validDigit := ch >= '0' && ch <= '9'
+		validOther := ch == '.' || ch == '-' || ch == '_'
+		if !validLowercaseLetter && !validUppercaseLetter && !validDigit && !validOther {
+			return false
+		}
+	}
+	return true
+}
+
+func isValidGRPCMetadataTextValue(textValue string) bool {
+	// Must be a valid gRPC "ASCII-Value" as defined here:
+	//   https://github.com/grpc/grpc/blob/4b05dc88b724214d0c725c8e7442cbc7a61b1374/doc/PROTOCOL-HTTP2.md
+	// This means printable ASCII (including/plus spaces); 0x20 to 0x7E inclusive.
+	bytes := []byte(textValue) // gRPC validates strings on the byte level, not Unicode.
+	for _, ch := range bytes {
+		if ch < 0x20 || ch > 0x7E {
+			return false
+		}
+	}
+	return true
+}
+
+func annotateContext(ctx context.Context, mux *ServeMux, req *http.Request, rpcMethodName string, options ...AnnotateContextOption) (context.Context, metadata.MD, error) {
+	ctx = withRPCMethod(ctx, rpcMethodName)
+	for _, o := range options {
+		ctx = o(ctx)
+	}
+	timeout := DefaultContextTimeout
+	if tm := req.Header.Get(metadataGrpcTimeout); tm != "" {
+		var err error
+		timeout, err = timeoutDecode(tm)
+		if err != nil {
+			return nil, nil, status.Errorf(codes.InvalidArgument, "invalid grpc-timeout: %s", tm)
+		}
+	}
+	var pairs []string
+	for key, vals := range req.Header {
+		key = textproto.CanonicalMIMEHeaderKey(key)
+		for _, val := range vals {
+			// For backwards-compatibility, pass through 'authorization' header with no prefix.
+			if key == "Authorization" {
+				pairs = append(pairs, "authorization", val)
+			}
+			if h, ok := mux.incomingHeaderMatcher(key); ok {
+				if !isValidGRPCMetadataKey(h) {
+					grpclog.Errorf("HTTP header name %q is not valid as gRPC metadata key; skipping", h)
+					continue
+				}
+				// Handles "-bin" metadata in grpc, since grpc will do another base64
+				// encode before sending to server, we need to decode it first.
+				if strings.HasSuffix(key, metadataHeaderBinarySuffix) {
+					b, err := decodeBinHeader(val)
+					if err != nil {
+						return nil, nil, status.Errorf(codes.InvalidArgument, "invalid binary header %s: %s", key, err)
+					}
+
+					val = string(b)
+				} else if !isValidGRPCMetadataTextValue(val) {
+					grpclog.Errorf("Value of HTTP header %q contains non-ASCII value (not valid as gRPC metadata): skipping", h)
+					continue
+				}
+				pairs = append(pairs, h, val)
+			}
+		}
+	}
+	if host := req.Header.Get(xForwardedHost); host != "" {
+		pairs = append(pairs, strings.ToLower(xForwardedHost), host)
+	} else if req.Host != "" {
+		pairs = append(pairs, strings.ToLower(xForwardedHost), req.Host)
+	}
+
+	if addr := req.RemoteAddr; addr != "" {
+		if remoteIP, _, err := net.SplitHostPort(addr); err == nil {
+			if fwd := req.Header.Get(xForwardedFor); fwd == "" {
+				pairs = append(pairs, strings.ToLower(xForwardedFor), remoteIP)
+			} else {
+				pairs = append(pairs, strings.ToLower(xForwardedFor), fmt.Sprintf("%s, %s", fwd, remoteIP))
+			}
+		}
+	}
+
+	if timeout != 0 {
+		//nolint:govet  // The context outlives this function
+		ctx, _ = context.WithTimeout(ctx, timeout)
+	}
+	if len(pairs) == 0 {
+		return ctx, nil, nil
+	}
+	md := metadata.Pairs(pairs...)
+	for _, mda := range mux.metadataAnnotators {
+		md = metadata.Join(md, mda(ctx, req))
+	}
+	return ctx, md, nil
+}
+
+// ServerMetadata consists of metadata sent from gRPC server.
+type ServerMetadata struct {
+	HeaderMD  metadata.MD
+	TrailerMD metadata.MD
+}
+
+type serverMetadataKey struct{}
+
+// NewServerMetadataContext creates a new context with ServerMetadata
+func NewServerMetadataContext(ctx context.Context, md ServerMetadata) context.Context {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	return context.WithValue(ctx, serverMetadataKey{}, md)
+}
+
+// ServerMetadataFromContext returns the ServerMetadata in ctx
+func ServerMetadataFromContext(ctx context.Context) (md ServerMetadata, ok bool) {
+	if ctx == nil {
+		return md, false
+	}
+	md, ok = ctx.Value(serverMetadataKey{}).(ServerMetadata)
+	return
+}
+
+// ServerTransportStream implements grpc.ServerTransportStream.
+// It should only be used by the generated files to support grpc.SendHeader
+// outside of gRPC server use.
+type ServerTransportStream struct {
+	mu      sync.Mutex
+	header  metadata.MD
+	trailer metadata.MD
+}
+
+// Method returns the method for the stream.
+func (s *ServerTransportStream) Method() string {
+	return ""
+}
+
+// Header returns the header metadata of the stream.
+func (s *ServerTransportStream) Header() metadata.MD {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.header.Copy()
+}
+
+// SetHeader sets the header metadata.
+func (s *ServerTransportStream) SetHeader(md metadata.MD) error {
+	if md.Len() == 0 {
+		return nil
+	}
+
+	s.mu.Lock()
+	s.header = metadata.Join(s.header, md)
+	s.mu.Unlock()
+	return nil
+}
+
+// SendHeader sets the header metadata.
+func (s *ServerTransportStream) SendHeader(md metadata.MD) error {
+	return s.SetHeader(md)
+}
+
+// Trailer returns the cached trailer metadata.
+func (s *ServerTransportStream) Trailer() metadata.MD {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.trailer.Copy()
+}
+
+// SetTrailer sets the trailer metadata.
+func (s *ServerTransportStream) SetTrailer(md metadata.MD) error {
+	if md.Len() == 0 {
+		return nil
+	}
+
+	s.mu.Lock()
+	s.trailer = metadata.Join(s.trailer, md)
+	s.mu.Unlock()
+	return nil
+}
+
+func timeoutDecode(s string) (time.Duration, error) {
+	size := len(s)
+	if size < 2 {
+		return 0, fmt.Errorf("timeout string is too short: %q", s)
+	}
+	d, ok := timeoutUnitToDuration(s[size-1])
+	if !ok {
+		return 0, fmt.Errorf("timeout unit is not recognized: %q", s)
+	}
+	t, err := strconv.ParseInt(s[:size-1], 10, 64)
+	if err != nil {
+		return 0, err
+	}
+	return d * time.Duration(t), nil
+}
+
+func timeoutUnitToDuration(u uint8) (d time.Duration, ok bool) {
+	switch u {
+	case 'H':
+		return time.Hour, true
+	case 'M':
+		return time.Minute, true
+	case 'S':
+		return time.Second, true
+	case 'm':
+		return time.Millisecond, true
+	case 'u':
+		return time.Microsecond, true
+	case 'n':
+		return time.Nanosecond, true
+	default:
+		return
+	}
+}
+
+// isPermanentHTTPHeader checks whether hdr belongs to the list of
+// permanent request headers maintained by IANA.
+// http://www.iana.org/assignments/message-headers/message-headers.xml
+func isPermanentHTTPHeader(hdr string) bool {
+	switch hdr {
+	case
+		"Accept",
+		"Accept-Charset",
+		"Accept-Language",
+		"Accept-Ranges",
+		"Authorization",
+		"Cache-Control",
+		"Content-Type",
+		"Cookie",
+		"Date",
+		"Expect",
+		"From",
+		"Host",
+		"If-Match",
+		"If-Modified-Since",
+		"If-None-Match",
+		"If-Schedule-Tag-Match",
+		"If-Unmodified-Since",
+		"Max-Forwards",
+		"Origin",
+		"Pragma",
+		"Referer",
+		"User-Agent",
+		"Via",
+		"Warning":
+		return true
+	}
+	return false
+}
+
+// isMalformedHTTPHeader checks whether header belongs to the list of
+// "malformed headers" and would be rejected by the gRPC server.
+func isMalformedHTTPHeader(header string) bool {
+	_, isMalformed := malformedHTTPHeaders[strings.ToLower(header)]
+	return isMalformed
+}
+
+// RPCMethod returns the method string for the server context. The returned
+// string is in the format of "/package.service/method".
+func RPCMethod(ctx context.Context) (string, bool) {
+	m := ctx.Value(rpcMethodKey{})
+	if m == nil {
+		return "", false
+	}
+	ms, ok := m.(string)
+	if !ok {
+		return "", false
+	}
+	return ms, true
+}
+
+func withRPCMethod(ctx context.Context, rpcMethodName string) context.Context {
+	return context.WithValue(ctx, rpcMethodKey{}, rpcMethodName)
+}
+
+// HTTPPathPattern returns the HTTP path pattern string relating to the HTTP handler, if one exists.
+// The format of the returned string is defined by the google.api.http path template type.
+func HTTPPathPattern(ctx context.Context) (string, bool) {
+	m := ctx.Value(httpPathPatternKey{})
+	if m == nil {
+		return "", false
+	}
+	ms, ok := m.(string)
+	if !ok {
+		return "", false
+	}
+	return ms, true
+}
+
+func withHTTPPathPattern(ctx context.Context, httpPathPattern string) context.Context {
+	return context.WithValue(ctx, httpPathPatternKey{}, httpPathPattern)
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/convert.go

@@ -0,0 +1,318 @@
+package runtime
+
+import (
+	"encoding/base64"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/types/known/durationpb"
+	"google.golang.org/protobuf/types/known/timestamppb"
+	"google.golang.org/protobuf/types/known/wrapperspb"
+)
+
+// String just returns the given string.
+// It is just for compatibility to other types.
+func String(val string) (string, error) {
+	return val, nil
+}
+
+// StringSlice converts 'val' where individual strings are separated by
+// 'sep' into a string slice.
+func StringSlice(val, sep string) ([]string, error) {
+	return strings.Split(val, sep), nil
+}
+
+// Bool converts the given string representation of a boolean value into bool.
+func Bool(val string) (bool, error) {
+	return strconv.ParseBool(val)
+}
+
+// BoolSlice converts 'val' where individual booleans are separated by
+// 'sep' into a bool slice.
+func BoolSlice(val, sep string) ([]bool, error) {
+	s := strings.Split(val, sep)
+	values := make([]bool, len(s))
+	for i, v := range s {
+		value, err := Bool(v)
+		if err != nil {
+			return nil, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Float64 converts the given string representation into representation of a floating point number into float64.
+func Float64(val string) (float64, error) {
+	return strconv.ParseFloat(val, 64)
+}
+
+// Float64Slice converts 'val' where individual floating point numbers are separated by
+// 'sep' into a float64 slice.
+func Float64Slice(val, sep string) ([]float64, error) {
+	s := strings.Split(val, sep)
+	values := make([]float64, len(s))
+	for i, v := range s {
+		value, err := Float64(v)
+		if err != nil {
+			return nil, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Float32 converts the given string representation of a floating point number into float32.
+func Float32(val string) (float32, error) {
+	f, err := strconv.ParseFloat(val, 32)
+	if err != nil {
+		return 0, err
+	}
+	return float32(f), nil
+}
+
+// Float32Slice converts 'val' where individual floating point numbers are separated by
+// 'sep' into a float32 slice.
+func Float32Slice(val, sep string) ([]float32, error) {
+	s := strings.Split(val, sep)
+	values := make([]float32, len(s))
+	for i, v := range s {
+		value, err := Float32(v)
+		if err != nil {
+			return nil, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Int64 converts the given string representation of an integer into int64.
+func Int64(val string) (int64, error) {
+	return strconv.ParseInt(val, 0, 64)
+}
+
+// Int64Slice converts 'val' where individual integers are separated by
+// 'sep' into a int64 slice.
+func Int64Slice(val, sep string) ([]int64, error) {
+	s := strings.Split(val, sep)
+	values := make([]int64, len(s))
+	for i, v := range s {
+		value, err := Int64(v)
+		if err != nil {
+			return nil, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Int32 converts the given string representation of an integer into int32.
+func Int32(val string) (int32, error) {
+	i, err := strconv.ParseInt(val, 0, 32)
+	if err != nil {
+		return 0, err
+	}
+	return int32(i), nil
+}
+
+// Int32Slice converts 'val' where individual integers are separated by
+// 'sep' into a int32 slice.
+func Int32Slice(val, sep string) ([]int32, error) {
+	s := strings.Split(val, sep)
+	values := make([]int32, len(s))
+	for i, v := range s {
+		value, err := Int32(v)
+		if err != nil {
+			return nil, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Uint64 converts the given string representation of an integer into uint64.
+func Uint64(val string) (uint64, error) {
+	return strconv.ParseUint(val, 0, 64)
+}
+
+// Uint64Slice converts 'val' where individual integers are separated by
+// 'sep' into a uint64 slice.
+func Uint64Slice(val, sep string) ([]uint64, error) {
+	s := strings.Split(val, sep)
+	values := make([]uint64, len(s))
+	for i, v := range s {
+		value, err := Uint64(v)
+		if err != nil {
+			return nil, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Uint32 converts the given string representation of an integer into uint32.
+func Uint32(val string) (uint32, error) {
+	i, err := strconv.ParseUint(val, 0, 32)
+	if err != nil {
+		return 0, err
+	}
+	return uint32(i), nil
+}
+
+// Uint32Slice converts 'val' where individual integers are separated by
+// 'sep' into a uint32 slice.
+func Uint32Slice(val, sep string) ([]uint32, error) {
+	s := strings.Split(val, sep)
+	values := make([]uint32, len(s))
+	for i, v := range s {
+		value, err := Uint32(v)
+		if err != nil {
+			return nil, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Bytes converts the given string representation of a byte sequence into a slice of bytes
+// A bytes sequence is encoded in URL-safe base64 without padding
+func Bytes(val string) ([]byte, error) {
+	b, err := base64.StdEncoding.DecodeString(val)
+	if err != nil {
+		b, err = base64.URLEncoding.DecodeString(val)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return b, nil
+}
+
+// BytesSlice converts 'val' where individual bytes sequences, encoded in URL-safe
+// base64 without padding, are separated by 'sep' into a slice of bytes slices slice.
+func BytesSlice(val, sep string) ([][]byte, error) {
+	s := strings.Split(val, sep)
+	values := make([][]byte, len(s))
+	for i, v := range s {
+		value, err := Bytes(v)
+		if err != nil {
+			return nil, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Timestamp converts the given RFC3339 formatted string into a timestamp.Timestamp.
+func Timestamp(val string) (*timestamppb.Timestamp, error) {
+	var r timestamppb.Timestamp
+	val = strconv.Quote(strings.Trim(val, `"`))
+	unmarshaler := &protojson.UnmarshalOptions{}
+	if err := unmarshaler.Unmarshal([]byte(val), &r); err != nil {
+		return nil, err
+	}
+	return &r, nil
+}
+
+// Duration converts the given string into a timestamp.Duration.
+func Duration(val string) (*durationpb.Duration, error) {
+	var r durationpb.Duration
+	val = strconv.Quote(strings.Trim(val, `"`))
+	unmarshaler := &protojson.UnmarshalOptions{}
+	if err := unmarshaler.Unmarshal([]byte(val), &r); err != nil {
+		return nil, err
+	}
+	return &r, nil
+}
+
+// Enum converts the given string into an int32 that should be type casted into the
+// correct enum proto type.
+func Enum(val string, enumValMap map[string]int32) (int32, error) {
+	e, ok := enumValMap[val]
+	if ok {
+		return e, nil
+	}
+
+	i, err := Int32(val)
+	if err != nil {
+		return 0, fmt.Errorf("%s is not valid", val)
+	}
+	for _, v := range enumValMap {
+		if v == i {
+			return i, nil
+		}
+	}
+	return 0, fmt.Errorf("%s is not valid", val)
+}
+
+// EnumSlice converts 'val' where individual enums are separated by 'sep'
+// into a int32 slice. Each individual int32 should be type casted into the
+// correct enum proto type.
+func EnumSlice(val, sep string, enumValMap map[string]int32) ([]int32, error) {
+	s := strings.Split(val, sep)
+	values := make([]int32, len(s))
+	for i, v := range s {
+		value, err := Enum(v, enumValMap)
+		if err != nil {
+			return nil, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Support for google.protobuf.wrappers on top of primitive types
+
+// StringValue well-known type support as wrapper around string type
+func StringValue(val string) (*wrapperspb.StringValue, error) {
+	return wrapperspb.String(val), nil
+}
+
+// FloatValue well-known type support as wrapper around float32 type
+func FloatValue(val string) (*wrapperspb.FloatValue, error) {
+	parsedVal, err := Float32(val)
+	return wrapperspb.Float(parsedVal), err
+}
+
+// DoubleValue well-known type support as wrapper around float64 type
+func DoubleValue(val string) (*wrapperspb.DoubleValue, error) {
+	parsedVal, err := Float64(val)
+	return wrapperspb.Double(parsedVal), err
+}
+
+// BoolValue well-known type support as wrapper around bool type
+func BoolValue(val string) (*wrapperspb.BoolValue, error) {
+	parsedVal, err := Bool(val)
+	return wrapperspb.Bool(parsedVal), err
+}
+
+// Int32Value well-known type support as wrapper around int32 type
+func Int32Value(val string) (*wrapperspb.Int32Value, error) {
+	parsedVal, err := Int32(val)
+	return wrapperspb.Int32(parsedVal), err
+}
+
+// UInt32Value well-known type support as wrapper around uint32 type
+func UInt32Value(val string) (*wrapperspb.UInt32Value, error) {
+	parsedVal, err := Uint32(val)
+	return wrapperspb.UInt32(parsedVal), err
+}
+
+// Int64Value well-known type support as wrapper around int64 type
+func Int64Value(val string) (*wrapperspb.Int64Value, error) {
+	parsedVal, err := Int64(val)
+	return wrapperspb.Int64(parsedVal), err
+}
+
+// UInt64Value well-known type support as wrapper around uint64 type
+func UInt64Value(val string) (*wrapperspb.UInt64Value, error) {
+	parsedVal, err := Uint64(val)
+	return wrapperspb.UInt64(parsedVal), err
+}
+
+// BytesValue well-known type support as wrapper around bytes[] type
+func BytesValue(val string) (*wrapperspb.BytesValue, error) {
+	parsedVal, err := Bytes(val)
+	return wrapperspb.Bytes(parsedVal), err
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/doc.go

@@ -0,0 +1,5 @@
+/*
+Package runtime contains runtime helper functions used by
+servers which protoc-gen-grpc-gateway generates.
+*/
+package runtime

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/errors.go

@@ -0,0 +1,181 @@
+package runtime
+
+import (
+	"context"
+	"errors"
+	"io"
+	"net/http"
+
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/status"
+)
+
+// ErrorHandlerFunc is the signature used to configure error handling.
+type ErrorHandlerFunc func(context.Context, *ServeMux, Marshaler, http.ResponseWriter, *http.Request, error)
+
+// StreamErrorHandlerFunc is the signature used to configure stream error handling.
+type StreamErrorHandlerFunc func(context.Context, error) *status.Status
+
+// RoutingErrorHandlerFunc is the signature used to configure error handling for routing errors.
+type RoutingErrorHandlerFunc func(context.Context, *ServeMux, Marshaler, http.ResponseWriter, *http.Request, int)
+
+// HTTPStatusError is the error to use when needing to provide a different HTTP status code for an error
+// passed to the DefaultRoutingErrorHandler.
+type HTTPStatusError struct {
+	HTTPStatus int
+	Err        error
+}
+
+func (e *HTTPStatusError) Error() string {
+	return e.Err.Error()
+}
+
+// HTTPStatusFromCode converts a gRPC error code into the corresponding HTTP response status.
+// See: https://github.com/googleapis/googleapis/blob/master/google/rpc/code.proto
+func HTTPStatusFromCode(code codes.Code) int {
+	switch code {
+	case codes.OK:
+		return http.StatusOK
+	case codes.Canceled:
+		return 499
+	case codes.Unknown:
+		return http.StatusInternalServerError
+	case codes.InvalidArgument:
+		return http.StatusBadRequest
+	case codes.DeadlineExceeded:
+		return http.StatusGatewayTimeout
+	case codes.NotFound:
+		return http.StatusNotFound
+	case codes.AlreadyExists:
+		return http.StatusConflict
+	case codes.PermissionDenied:
+		return http.StatusForbidden
+	case codes.Unauthenticated:
+		return http.StatusUnauthorized
+	case codes.ResourceExhausted:
+		return http.StatusTooManyRequests
+	case codes.FailedPrecondition:
+		// Note, this deliberately doesn't translate to the similarly named '412 Precondition Failed' HTTP response status.
+		return http.StatusBadRequest
+	case codes.Aborted:
+		return http.StatusConflict
+	case codes.OutOfRange:
+		return http.StatusBadRequest
+	case codes.Unimplemented:
+		return http.StatusNotImplemented
+	case codes.Internal:
+		return http.StatusInternalServerError
+	case codes.Unavailable:
+		return http.StatusServiceUnavailable
+	case codes.DataLoss:
+		return http.StatusInternalServerError
+	default:
+		grpclog.Infof("Unknown gRPC error code: %v", code)
+		return http.StatusInternalServerError
+	}
+}
+
+// HTTPError uses the mux-configured error handler.
+func HTTPError(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, r *http.Request, err error) {
+	mux.errorHandler(ctx, mux, marshaler, w, r, err)
+}
+
+// DefaultHTTPErrorHandler is the default error handler.
+// If "err" is a gRPC Status, the function replies with the status code mapped by HTTPStatusFromCode.
+// If "err" is a HTTPStatusError, the function replies with the status code provide by that struct. This is
+// intended to allow passing through of specific statuses via the function set via WithRoutingErrorHandler
+// for the ServeMux constructor to handle edge cases which the standard mappings in HTTPStatusFromCode
+// are insufficient for.
+// If otherwise, it replies with http.StatusInternalServerError.
+//
+// The response body written by this function is a Status message marshaled by the Marshaler.
+func DefaultHTTPErrorHandler(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, r *http.Request, err error) {
+	// return Internal when Marshal failed
+	const fallback = `{"code": 13, "message": "failed to marshal error message"}`
+
+	var customStatus *HTTPStatusError
+	if errors.As(err, &customStatus) {
+		err = customStatus.Err
+	}
+
+	s := status.Convert(err)
+	pb := s.Proto()
+
+	w.Header().Del("Trailer")
+	w.Header().Del("Transfer-Encoding")
+
+	contentType := marshaler.ContentType(pb)
+	w.Header().Set("Content-Type", contentType)
+
+	if s.Code() == codes.Unauthenticated {
+		w.Header().Set("WWW-Authenticate", s.Message())
+	}
+
+	buf, merr := marshaler.Marshal(pb)
+	if merr != nil {
+		grpclog.Infof("Failed to marshal error message %q: %v", s, merr)
+		w.WriteHeader(http.StatusInternalServerError)
+		if _, err := io.WriteString(w, fallback); err != nil {
+			grpclog.Infof("Failed to write response: %v", err)
+		}
+		return
+	}
+
+	md, ok := ServerMetadataFromContext(ctx)
+	if !ok {
+		grpclog.Infof("Failed to extract ServerMetadata from context")
+	}
+
+	handleForwardResponseServerMetadata(w, mux, md)
+
+	// RFC 7230 https://tools.ietf.org/html/rfc7230#section-4.1.2
+	// Unless the request includes a TE header field indicating "trailers"
+	// is acceptable, as described in Section 4.3, a server SHOULD NOT
+	// generate trailer fields that it believes are necessary for the user
+	// agent to receive.
+	doForwardTrailers := requestAcceptsTrailers(r)
+
+	if doForwardTrailers {
+		handleForwardResponseTrailerHeader(w, md)
+		w.Header().Set("Transfer-Encoding", "chunked")
+	}
+
+	st := HTTPStatusFromCode(s.Code())
+	if customStatus != nil {
+		st = customStatus.HTTPStatus
+	}
+
+	w.WriteHeader(st)
+	if _, err := w.Write(buf); err != nil {
+		grpclog.Infof("Failed to write response: %v", err)
+	}
+
+	if doForwardTrailers {
+		handleForwardResponseTrailer(w, md)
+	}
+}
+
+func DefaultStreamErrorHandler(_ context.Context, err error) *status.Status {
+	return status.Convert(err)
+}
+
+// DefaultRoutingErrorHandler is our default handler for routing errors.
+// By default http error codes mapped on the following error codes:
+//
+//	NotFound -> grpc.NotFound
+//	StatusBadRequest -> grpc.InvalidArgument
+//	MethodNotAllowed -> grpc.Unimplemented
+//	Other -> grpc.Internal, method is not expecting to be called for anything else
+func DefaultRoutingErrorHandler(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, r *http.Request, httpStatus int) {
+	sterr := status.Error(codes.Internal, "Unexpected routing error")
+	switch httpStatus {
+	case http.StatusBadRequest:
+		sterr = status.Error(codes.InvalidArgument, http.StatusText(httpStatus))
+	case http.StatusMethodNotAllowed:
+		sterr = status.Error(codes.Unimplemented, http.StatusText(httpStatus))
+	case http.StatusNotFound:
+		sterr = status.Error(codes.NotFound, http.StatusText(httpStatus))
+	}
+	mux.errorHandler(ctx, mux, marshaler, w, r, sterr)
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/fieldmask.go

@@ -0,0 +1,166 @@
+package runtime
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"sort"
+
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	field_mask "google.golang.org/protobuf/types/known/fieldmaskpb"
+)
+
+func getFieldByName(fields protoreflect.FieldDescriptors, name string) protoreflect.FieldDescriptor {
+	fd := fields.ByName(protoreflect.Name(name))
+	if fd != nil {
+		return fd
+	}
+
+	return fields.ByJSONName(name)
+}
+
+// FieldMaskFromRequestBody creates a FieldMask printing all complete paths from the JSON body.
+func FieldMaskFromRequestBody(r io.Reader, msg proto.Message) (*field_mask.FieldMask, error) {
+	fm := &field_mask.FieldMask{}
+	var root interface{}
+
+	if err := json.NewDecoder(r).Decode(&root); err != nil {
+		if err == io.EOF {
+			return fm, nil
+		}
+		return nil, err
+	}
+
+	queue := []fieldMaskPathItem{{node: root, msg: msg.ProtoReflect()}}
+	for len(queue) > 0 {
+		// dequeue an item
+		item := queue[0]
+		queue = queue[1:]
+
+		m, ok := item.node.(map[string]interface{})
+		switch {
+		case ok:
+			// if the item is an object, then enqueue all of its children
+			for k, v := range m {
+				if item.msg == nil {
+					return nil, errors.New("JSON structure did not match request type")
+				}
+
+				fd := getFieldByName(item.msg.Descriptor().Fields(), k)
+				if fd == nil {
+					return nil, fmt.Errorf("could not find field %q in %q", k, item.msg.Descriptor().FullName())
+				}
+
+				if isDynamicProtoMessage(fd.Message()) {
+					for _, p := range buildPathsBlindly(string(fd.FullName().Name()), v) {
+						newPath := p
+						if item.path != "" {
+							newPath = item.path + "." + newPath
+						}
+						queue = append(queue, fieldMaskPathItem{path: newPath})
+					}
+					continue
+				}
+
+				if isProtobufAnyMessage(fd.Message()) && !fd.IsList() {
+					_, hasTypeField := v.(map[string]interface{})["@type"]
+					if hasTypeField {
+						queue = append(queue, fieldMaskPathItem{path: k})
+						continue
+					} else {
+						return nil, fmt.Errorf("could not find field @type in %q in message %q", k, item.msg.Descriptor().FullName())
+					}
+
+				}
+
+				child := fieldMaskPathItem{
+					node: v,
+				}
+				if item.path == "" {
+					child.path = string(fd.FullName().Name())
+				} else {
+					child.path = item.path + "." + string(fd.FullName().Name())
+				}
+
+				switch {
+				case fd.IsList(), fd.IsMap():
+					// As per: https://github.com/protocolbuffers/protobuf/blob/master/src/google/protobuf/field_mask.proto#L85-L86
+					// Do not recurse into repeated fields. The repeated field goes on the end of the path and we stop.
+					fm.Paths = append(fm.Paths, child.path)
+				case fd.Message() != nil:
+					child.msg = item.msg.Get(fd).Message()
+					fallthrough
+				default:
+					queue = append(queue, child)
+				}
+			}
+		case len(item.path) > 0:
+			// otherwise, it's a leaf node so print its path
+			fm.Paths = append(fm.Paths, item.path)
+		}
+	}
+
+	// Sort for deterministic output in the presence
+	// of repeated fields.
+	sort.Strings(fm.Paths)
+
+	return fm, nil
+}
+
+func isProtobufAnyMessage(md protoreflect.MessageDescriptor) bool {
+	return md != nil && (md.FullName() == "google.protobuf.Any")
+}
+
+func isDynamicProtoMessage(md protoreflect.MessageDescriptor) bool {
+	return md != nil && (md.FullName() == "google.protobuf.Struct" || md.FullName() == "google.protobuf.Value")
+}
+
+// buildPathsBlindly does not attempt to match proto field names to the
+// json value keys.  Instead it relies completely on the structure of
+// the unmarshalled json contained within in.
+// Returns a slice containing all subpaths with the root at the
+// passed in name and json value.
+func buildPathsBlindly(name string, in interface{}) []string {
+	m, ok := in.(map[string]interface{})
+	if !ok {
+		return []string{name}
+	}
+
+	var paths []string
+	queue := []fieldMaskPathItem{{path: name, node: m}}
+	for len(queue) > 0 {
+		cur := queue[0]
+		queue = queue[1:]
+
+		m, ok := cur.node.(map[string]interface{})
+		if !ok {
+			// This should never happen since we should always check that we only add
+			// nodes of type map[string]interface{} to the queue.
+			continue
+		}
+		for k, v := range m {
+			if mi, ok := v.(map[string]interface{}); ok {
+				queue = append(queue, fieldMaskPathItem{path: cur.path + "." + k, node: mi})
+			} else {
+				// This is not a struct, so there are no more levels to descend.
+				curPath := cur.path + "." + k
+				paths = append(paths, curPath)
+			}
+		}
+	}
+	return paths
+}
+
+// fieldMaskPathItem stores a in-progress deconstruction of a path for a fieldmask
+type fieldMaskPathItem struct {
+	// the list of prior fields leading up to node connected by dots
+	path string
+
+	// a generic decoded json object the current item to inspect for further path extraction
+	node interface{}
+
+	// parent message
+	msg protoreflect.Message
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/handler.go

@@ -0,0 +1,227 @@
+package runtime
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"net/textproto"
+	"strings"
+
+	"google.golang.org/genproto/googleapis/api/httpbody"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/proto"
+)
+
+// ForwardResponseStream forwards the stream from gRPC server to REST client.
+func ForwardResponseStream(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, req *http.Request, recv func() (proto.Message, error), opts ...func(context.Context, http.ResponseWriter, proto.Message) error) {
+	f, ok := w.(http.Flusher)
+	if !ok {
+		grpclog.Infof("Flush not supported in %T", w)
+		http.Error(w, "unexpected type of web server", http.StatusInternalServerError)
+		return
+	}
+
+	md, ok := ServerMetadataFromContext(ctx)
+	if !ok {
+		grpclog.Infof("Failed to extract ServerMetadata from context")
+		http.Error(w, "unexpected error", http.StatusInternalServerError)
+		return
+	}
+	handleForwardResponseServerMetadata(w, mux, md)
+
+	w.Header().Set("Transfer-Encoding", "chunked")
+	if err := handleForwardResponseOptions(ctx, w, nil, opts); err != nil {
+		HTTPError(ctx, mux, marshaler, w, req, err)
+		return
+	}
+
+	var delimiter []byte
+	if d, ok := marshaler.(Delimited); ok {
+		delimiter = d.Delimiter()
+	} else {
+		delimiter = []byte("\n")
+	}
+
+	var wroteHeader bool
+	for {
+		resp, err := recv()
+		if err == io.EOF {
+			return
+		}
+		if err != nil {
+			handleForwardResponseStreamError(ctx, wroteHeader, marshaler, w, req, mux, err, delimiter)
+			return
+		}
+		if err := handleForwardResponseOptions(ctx, w, resp, opts); err != nil {
+			handleForwardResponseStreamError(ctx, wroteHeader, marshaler, w, req, mux, err, delimiter)
+			return
+		}
+
+		if !wroteHeader {
+			w.Header().Set("Content-Type", marshaler.ContentType(resp))
+		}
+
+		var buf []byte
+		httpBody, isHTTPBody := resp.(*httpbody.HttpBody)
+		switch {
+		case resp == nil:
+			buf, err = marshaler.Marshal(errorChunk(status.New(codes.Internal, "empty response")))
+		case isHTTPBody:
+			buf = httpBody.GetData()
+		default:
+			result := map[string]interface{}{"result": resp}
+			if rb, ok := resp.(responseBody); ok {
+				result["result"] = rb.XXX_ResponseBody()
+			}
+
+			buf, err = marshaler.Marshal(result)
+		}
+
+		if err != nil {
+			grpclog.Infof("Failed to marshal response chunk: %v", err)
+			handleForwardResponseStreamError(ctx, wroteHeader, marshaler, w, req, mux, err, delimiter)
+			return
+		}
+		if _, err := w.Write(buf); err != nil {
+			grpclog.Infof("Failed to send response chunk: %v", err)
+			return
+		}
+		wroteHeader = true
+		if _, err := w.Write(delimiter); err != nil {
+			grpclog.Infof("Failed to send delimiter chunk: %v", err)
+			return
+		}
+		f.Flush()
+	}
+}
+
+func handleForwardResponseServerMetadata(w http.ResponseWriter, mux *ServeMux, md ServerMetadata) {
+	for k, vs := range md.HeaderMD {
+		if h, ok := mux.outgoingHeaderMatcher(k); ok {
+			for _, v := range vs {
+				w.Header().Add(h, v)
+			}
+		}
+	}
+}
+
+func handleForwardResponseTrailerHeader(w http.ResponseWriter, md ServerMetadata) {
+	for k := range md.TrailerMD {
+		tKey := textproto.CanonicalMIMEHeaderKey(fmt.Sprintf("%s%s", MetadataTrailerPrefix, k))
+		w.Header().Add("Trailer", tKey)
+	}
+}
+
+func handleForwardResponseTrailer(w http.ResponseWriter, md ServerMetadata) {
+	for k, vs := range md.TrailerMD {
+		tKey := fmt.Sprintf("%s%s", MetadataTrailerPrefix, k)
+		for _, v := range vs {
+			w.Header().Add(tKey, v)
+		}
+	}
+}
+
+// responseBody interface contains method for getting field for marshaling to the response body
+// this method is generated for response struct from the value of `response_body` in the `google.api.HttpRule`
+type responseBody interface {
+	XXX_ResponseBody() interface{}
+}
+
+// ForwardResponseMessage forwards the message "resp" from gRPC server to REST client.
+func ForwardResponseMessage(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, req *http.Request, resp proto.Message, opts ...func(context.Context, http.ResponseWriter, proto.Message) error) {
+	md, ok := ServerMetadataFromContext(ctx)
+	if !ok {
+		grpclog.Infof("Failed to extract ServerMetadata from context")
+	}
+
+	handleForwardResponseServerMetadata(w, mux, md)
+
+	// RFC 7230 https://tools.ietf.org/html/rfc7230#section-4.1.2
+	// Unless the request includes a TE header field indicating "trailers"
+	// is acceptable, as described in Section 4.3, a server SHOULD NOT
+	// generate trailer fields that it believes are necessary for the user
+	// agent to receive.
+	doForwardTrailers := requestAcceptsTrailers(req)
+
+	if doForwardTrailers {
+		handleForwardResponseTrailerHeader(w, md)
+		w.Header().Set("Transfer-Encoding", "chunked")
+	}
+
+	handleForwardResponseTrailerHeader(w, md)
+
+	contentType := marshaler.ContentType(resp)
+	w.Header().Set("Content-Type", contentType)
+
+	if err := handleForwardResponseOptions(ctx, w, resp, opts); err != nil {
+		HTTPError(ctx, mux, marshaler, w, req, err)
+		return
+	}
+	var buf []byte
+	var err error
+	if rb, ok := resp.(responseBody); ok {
+		buf, err = marshaler.Marshal(rb.XXX_ResponseBody())
+	} else {
+		buf, err = marshaler.Marshal(resp)
+	}
+	if err != nil {
+		grpclog.Infof("Marshal error: %v", err)
+		HTTPError(ctx, mux, marshaler, w, req, err)
+		return
+	}
+
+	if _, err = w.Write(buf); err != nil {
+		grpclog.Infof("Failed to write response: %v", err)
+	}
+
+	if doForwardTrailers {
+		handleForwardResponseTrailer(w, md)
+	}
+}
+
+func requestAcceptsTrailers(req *http.Request) bool {
+	te := req.Header.Get("TE")
+	return strings.Contains(strings.ToLower(te), "trailers")
+}
+
+func handleForwardResponseOptions(ctx context.Context, w http.ResponseWriter, resp proto.Message, opts []func(context.Context, http.ResponseWriter, proto.Message) error) error {
+	if len(opts) == 0 {
+		return nil
+	}
+	for _, opt := range opts {
+		if err := opt(ctx, w, resp); err != nil {
+			grpclog.Infof("Error handling ForwardResponseOptions: %v", err)
+			return err
+		}
+	}
+	return nil
+}
+
+func handleForwardResponseStreamError(ctx context.Context, wroteHeader bool, marshaler Marshaler, w http.ResponseWriter, req *http.Request, mux *ServeMux, err error, delimiter []byte) {
+	st := mux.streamErrorHandler(ctx, err)
+	msg := errorChunk(st)
+	if !wroteHeader {
+		w.Header().Set("Content-Type", marshaler.ContentType(msg))
+		w.WriteHeader(HTTPStatusFromCode(st.Code()))
+	}
+	buf, err := marshaler.Marshal(msg)
+	if err != nil {
+		grpclog.Infof("Failed to marshal an error: %v", err)
+		return
+	}
+	if _, err := w.Write(buf); err != nil {
+		grpclog.Infof("Failed to notify error to client: %v", err)
+		return
+	}
+	if _, err := w.Write(delimiter); err != nil {
+		grpclog.Infof("Failed to send delimiter chunk: %v", err)
+		return
+	}
+}
+
+func errorChunk(st *status.Status) map[string]proto.Message {
+	return map[string]proto.Message{"error": st.Proto()}
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/marshal_httpbodyproto.go

@@ -0,0 +1,32 @@
+package runtime
+
+import (
+	"google.golang.org/genproto/googleapis/api/httpbody"
+)
+
+// HTTPBodyMarshaler is a Marshaler which supports marshaling of a
+// google.api.HttpBody message as the full response body if it is
+// the actual message used as the response. If not, then this will
+// simply fallback to the Marshaler specified as its default Marshaler.
+type HTTPBodyMarshaler struct {
+	Marshaler
+}
+
+// ContentType returns its specified content type in case v is a
+// google.api.HttpBody message, otherwise it will fall back to the default Marshalers
+// content type.
+func (h *HTTPBodyMarshaler) ContentType(v interface{}) string {
+	if httpBody, ok := v.(*httpbody.HttpBody); ok {
+		return httpBody.GetContentType()
+	}
+	return h.Marshaler.ContentType(v)
+}
+
+// Marshal marshals "v" by returning the body bytes if v is a
+// google.api.HttpBody message, otherwise it falls back to the default Marshaler.
+func (h *HTTPBodyMarshaler) Marshal(v interface{}) ([]byte, error) {
+	if httpBody, ok := v.(*httpbody.HttpBody); ok {
+		return httpBody.Data, nil
+	}
+	return h.Marshaler.Marshal(v)
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/marshal_json.go

@@ -0,0 +1,45 @@
+package runtime
+
+import (
+	"encoding/json"
+	"io"
+)
+
+// JSONBuiltin is a Marshaler which marshals/unmarshals into/from JSON
+// with the standard "encoding/json" package of Golang.
+// Although it is generally faster for simple proto messages than JSONPb,
+// it does not support advanced features of protobuf, e.g. map, oneof, ....
+//
+// The NewEncoder and NewDecoder types return *json.Encoder and
+// *json.Decoder respectively.
+type JSONBuiltin struct{}
+
+// ContentType always Returns "application/json".
+func (*JSONBuiltin) ContentType(_ interface{}) string {
+	return "application/json"
+}
+
+// Marshal marshals "v" into JSON
+func (j *JSONBuiltin) Marshal(v interface{}) ([]byte, error) {
+	return json.Marshal(v)
+}
+
+// Unmarshal unmarshals JSON data into "v".
+func (j *JSONBuiltin) Unmarshal(data []byte, v interface{}) error {
+	return json.Unmarshal(data, v)
+}
+
+// NewDecoder returns a Decoder which reads JSON stream from "r".
+func (j *JSONBuiltin) NewDecoder(r io.Reader) Decoder {
+	return json.NewDecoder(r)
+}
+
+// NewEncoder returns an Encoder which writes JSON stream into "w".
+func (j *JSONBuiltin) NewEncoder(w io.Writer) Encoder {
+	return json.NewEncoder(w)
+}
+
+// Delimiter for newline encoded JSON streams.
+func (j *JSONBuiltin) Delimiter() []byte {
+	return []byte("\n")
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/marshal_jsonpb.go

@@ -0,0 +1,348 @@
+package runtime
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"reflect"
+	"strconv"
+
+	"google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/proto"
+)
+
+// JSONPb is a Marshaler which marshals/unmarshals into/from JSON
+// with the "google.golang.org/protobuf/encoding/protojson" marshaler.
+// It supports the full functionality of protobuf unlike JSONBuiltin.
+//
+// The NewDecoder method returns a DecoderWrapper, so the underlying
+// *json.Decoder methods can be used.
+type JSONPb struct {
+	protojson.MarshalOptions
+	protojson.UnmarshalOptions
+}
+
+// ContentType always returns "application/json".
+func (*JSONPb) ContentType(_ interface{}) string {
+	return "application/json"
+}
+
+// Marshal marshals "v" into JSON.
+func (j *JSONPb) Marshal(v interface{}) ([]byte, error) {
+	if _, ok := v.(proto.Message); !ok {
+		return j.marshalNonProtoField(v)
+	}
+
+	var buf bytes.Buffer
+	if err := j.marshalTo(&buf, v); err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}
+
+func (j *JSONPb) marshalTo(w io.Writer, v interface{}) error {
+	p, ok := v.(proto.Message)
+	if !ok {
+		buf, err := j.marshalNonProtoField(v)
+		if err != nil {
+			return err
+		}
+		_, err = w.Write(buf)
+		return err
+	}
+	b, err := j.MarshalOptions.Marshal(p)
+	if err != nil {
+		return err
+	}
+
+	_, err = w.Write(b)
+	return err
+}
+
+var (
+	// protoMessageType is stored to prevent constant lookup of the same type at runtime.
+	protoMessageType = reflect.TypeOf((*proto.Message)(nil)).Elem()
+)
+
+// marshalNonProto marshals a non-message field of a protobuf message.
+// This function does not correctly marshal arbitrary data structures into JSON,
+// it is only capable of marshaling non-message field values of protobuf,
+// i.e. primitive types, enums; pointers to primitives or enums; maps from
+// integer/string types to primitives/enums/pointers to messages.
+func (j *JSONPb) marshalNonProtoField(v interface{}) ([]byte, error) {
+	if v == nil {
+		return []byte("null"), nil
+	}
+	rv := reflect.ValueOf(v)
+	for rv.Kind() == reflect.Ptr {
+		if rv.IsNil() {
+			return []byte("null"), nil
+		}
+		rv = rv.Elem()
+	}
+
+	if rv.Kind() == reflect.Slice {
+		if rv.IsNil() {
+			if j.EmitUnpopulated {
+				return []byte("[]"), nil
+			}
+			return []byte("null"), nil
+		}
+
+		if rv.Type().Elem().Implements(protoMessageType) {
+			var buf bytes.Buffer
+			if err := buf.WriteByte('['); err != nil {
+				return nil, err
+			}
+			for i := 0; i < rv.Len(); i++ {
+				if i != 0 {
+					if err := buf.WriteByte(','); err != nil {
+						return nil, err
+					}
+				}
+				if err := j.marshalTo(&buf, rv.Index(i).Interface().(proto.Message)); err != nil {
+					return nil, err
+				}
+			}
+			if err := buf.WriteByte(']'); err != nil {
+				return nil, err
+			}
+
+			return buf.Bytes(), nil
+		}
+
+		if rv.Type().Elem().Implements(typeProtoEnum) {
+			var buf bytes.Buffer
+			if err := buf.WriteByte('['); err != nil {
+				return nil, err
+			}
+			for i := 0; i < rv.Len(); i++ {
+				if i != 0 {
+					if err := buf.WriteByte(','); err != nil {
+						return nil, err
+					}
+				}
+				var err error
+				if j.UseEnumNumbers {
+					_, err = buf.WriteString(strconv.FormatInt(rv.Index(i).Int(), 10))
+				} else {
+					_, err = buf.WriteString("\"" + rv.Index(i).Interface().(protoEnum).String() + "\"")
+				}
+				if err != nil {
+					return nil, err
+				}
+			}
+			if err := buf.WriteByte(']'); err != nil {
+				return nil, err
+			}
+
+			return buf.Bytes(), nil
+		}
+	}
+
+	if rv.Kind() == reflect.Map {
+		m := make(map[string]*json.RawMessage)
+		for _, k := range rv.MapKeys() {
+			buf, err := j.Marshal(rv.MapIndex(k).Interface())
+			if err != nil {
+				return nil, err
+			}
+			m[fmt.Sprintf("%v", k.Interface())] = (*json.RawMessage)(&buf)
+		}
+		if j.Indent != "" {
+			return json.MarshalIndent(m, "", j.Indent)
+		}
+		return json.Marshal(m)
+	}
+	if enum, ok := rv.Interface().(protoEnum); ok && !j.UseEnumNumbers {
+		return json.Marshal(enum.String())
+	}
+	return json.Marshal(rv.Interface())
+}
+
+// Unmarshal unmarshals JSON "data" into "v"
+func (j *JSONPb) Unmarshal(data []byte, v interface{}) error {
+	return unmarshalJSONPb(data, j.UnmarshalOptions, v)
+}
+
+// NewDecoder returns a Decoder which reads JSON stream from "r".
+func (j *JSONPb) NewDecoder(r io.Reader) Decoder {
+	d := json.NewDecoder(r)
+	return DecoderWrapper{
+		Decoder:          d,
+		UnmarshalOptions: j.UnmarshalOptions,
+	}
+}
+
+// DecoderWrapper is a wrapper around a *json.Decoder that adds
+// support for protos to the Decode method.
+type DecoderWrapper struct {
+	*json.Decoder
+	protojson.UnmarshalOptions
+}
+
+// Decode wraps the embedded decoder's Decode method to support
+// protos using a jsonpb.Unmarshaler.
+func (d DecoderWrapper) Decode(v interface{}) error {
+	return decodeJSONPb(d.Decoder, d.UnmarshalOptions, v)
+}
+
+// NewEncoder returns an Encoder which writes JSON stream into "w".
+func (j *JSONPb) NewEncoder(w io.Writer) Encoder {
+	return EncoderFunc(func(v interface{}) error {
+		if err := j.marshalTo(w, v); err != nil {
+			return err
+		}
+		// mimic json.Encoder by adding a newline (makes output
+		// easier to read when it contains multiple encoded items)
+		_, err := w.Write(j.Delimiter())
+		return err
+	})
+}
+
+func unmarshalJSONPb(data []byte, unmarshaler protojson.UnmarshalOptions, v interface{}) error {
+	d := json.NewDecoder(bytes.NewReader(data))
+	return decodeJSONPb(d, unmarshaler, v)
+}
+
+func decodeJSONPb(d *json.Decoder, unmarshaler protojson.UnmarshalOptions, v interface{}) error {
+	p, ok := v.(proto.Message)
+	if !ok {
+		return decodeNonProtoField(d, unmarshaler, v)
+	}
+
+	// Decode into bytes for marshalling
+	var b json.RawMessage
+	if err := d.Decode(&b); err != nil {
+		return err
+	}
+
+	return unmarshaler.Unmarshal([]byte(b), p)
+}
+
+func decodeNonProtoField(d *json.Decoder, unmarshaler protojson.UnmarshalOptions, v interface{}) error {
+	rv := reflect.ValueOf(v)
+	if rv.Kind() != reflect.Ptr {
+		return fmt.Errorf("%T is not a pointer", v)
+	}
+	for rv.Kind() == reflect.Ptr {
+		if rv.IsNil() {
+			rv.Set(reflect.New(rv.Type().Elem()))
+		}
+		if rv.Type().ConvertibleTo(typeProtoMessage) {
+			// Decode into bytes for marshalling
+			var b json.RawMessage
+			if err := d.Decode(&b); err != nil {
+				return err
+			}
+
+			return unmarshaler.Unmarshal([]byte(b), rv.Interface().(proto.Message))
+		}
+		rv = rv.Elem()
+	}
+	if rv.Kind() == reflect.Map {
+		if rv.IsNil() {
+			rv.Set(reflect.MakeMap(rv.Type()))
+		}
+		conv, ok := convFromType[rv.Type().Key().Kind()]
+		if !ok {
+			return fmt.Errorf("unsupported type of map field key: %v", rv.Type().Key())
+		}
+
+		m := make(map[string]*json.RawMessage)
+		if err := d.Decode(&m); err != nil {
+			return err
+		}
+		for k, v := range m {
+			result := conv.Call([]reflect.Value{reflect.ValueOf(k)})
+			if err := result[1].Interface(); err != nil {
+				return err.(error)
+			}
+			bk := result[0]
+			bv := reflect.New(rv.Type().Elem())
+			if v == nil {
+				null := json.RawMessage("null")
+				v = &null
+			}
+			if err := unmarshalJSONPb([]byte(*v), unmarshaler, bv.Interface()); err != nil {
+				return err
+			}
+			rv.SetMapIndex(bk, bv.Elem())
+		}
+		return nil
+	}
+	if rv.Kind() == reflect.Slice {
+		if rv.Type().Elem().Kind() == reflect.Uint8 {
+			var sl []byte
+			if err := d.Decode(&sl); err != nil {
+				return err
+			}
+			if sl != nil {
+				rv.SetBytes(sl)
+			}
+			return nil
+		}
+
+		var sl []json.RawMessage
+		if err := d.Decode(&sl); err != nil {
+			return err
+		}
+		if sl != nil {
+			rv.Set(reflect.MakeSlice(rv.Type(), 0, 0))
+		}
+		for _, item := range sl {
+			bv := reflect.New(rv.Type().Elem())
+			if err := unmarshalJSONPb([]byte(item), unmarshaler, bv.Interface()); err != nil {
+				return err
+			}
+			rv.Set(reflect.Append(rv, bv.Elem()))
+		}
+		return nil
+	}
+	if _, ok := rv.Interface().(protoEnum); ok {
+		var repr interface{}
+		if err := d.Decode(&repr); err != nil {
+			return err
+		}
+		switch v := repr.(type) {
+		case string:
+			// TODO(yugui) Should use proto.StructProperties?
+			return fmt.Errorf("unmarshaling of symbolic enum %q not supported: %T", repr, rv.Interface())
+		case float64:
+			rv.Set(reflect.ValueOf(int32(v)).Convert(rv.Type()))
+			return nil
+		default:
+			return fmt.Errorf("cannot assign %#v into Go type %T", repr, rv.Interface())
+		}
+	}
+	return d.Decode(v)
+}
+
+type protoEnum interface {
+	fmt.Stringer
+	EnumDescriptor() ([]byte, []int)
+}
+
+var typeProtoEnum = reflect.TypeOf((*protoEnum)(nil)).Elem()
+
+var typeProtoMessage = reflect.TypeOf((*proto.Message)(nil)).Elem()
+
+// Delimiter for newline encoded JSON streams.
+func (j *JSONPb) Delimiter() []byte {
+	return []byte("\n")
+}
+
+var (
+	convFromType = map[reflect.Kind]reflect.Value{
+		reflect.String:  reflect.ValueOf(String),
+		reflect.Bool:    reflect.ValueOf(Bool),
+		reflect.Float64: reflect.ValueOf(Float64),
+		reflect.Float32: reflect.ValueOf(Float32),
+		reflect.Int64:   reflect.ValueOf(Int64),
+		reflect.Int32:   reflect.ValueOf(Int32),
+		reflect.Uint64:  reflect.ValueOf(Uint64),
+		reflect.Uint32:  reflect.ValueOf(Uint32),
+		reflect.Slice:   reflect.ValueOf(Bytes),
+	}
+)

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/marshal_proto.go

@@ -0,0 +1,60 @@
+package runtime
+
+import (
+	"errors"
+	"io"
+
+	"google.golang.org/protobuf/proto"
+)
+
+// ProtoMarshaller is a Marshaller which marshals/unmarshals into/from serialize proto bytes
+type ProtoMarshaller struct{}
+
+// ContentType always returns "application/octet-stream".
+func (*ProtoMarshaller) ContentType(_ interface{}) string {
+	return "application/octet-stream"
+}
+
+// Marshal marshals "value" into Proto
+func (*ProtoMarshaller) Marshal(value interface{}) ([]byte, error) {
+	message, ok := value.(proto.Message)
+	if !ok {
+		return nil, errors.New("unable to marshal non proto field")
+	}
+	return proto.Marshal(message)
+}
+
+// Unmarshal unmarshals proto "data" into "value"
+func (*ProtoMarshaller) Unmarshal(data []byte, value interface{}) error {
+	message, ok := value.(proto.Message)
+	if !ok {
+		return errors.New("unable to unmarshal non proto field")
+	}
+	return proto.Unmarshal(data, message)
+}
+
+// NewDecoder returns a Decoder which reads proto stream from "reader".
+func (marshaller *ProtoMarshaller) NewDecoder(reader io.Reader) Decoder {
+	return DecoderFunc(func(value interface{}) error {
+		buffer, err := io.ReadAll(reader)
+		if err != nil {
+			return err
+		}
+		return marshaller.Unmarshal(buffer, value)
+	})
+}
+
+// NewEncoder returns an Encoder which writes proto stream into "writer".
+func (marshaller *ProtoMarshaller) NewEncoder(writer io.Writer) Encoder {
+	return EncoderFunc(func(value interface{}) error {
+		buffer, err := marshaller.Marshal(value)
+		if err != nil {
+			return err
+		}
+		if _, err := writer.Write(buffer); err != nil {
+			return err
+		}
+
+		return nil
+	})
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/marshaler.go

@@ -0,0 +1,50 @@
+package runtime
+
+import (
+	"io"
+)
+
+// Marshaler defines a conversion between byte sequence and gRPC payloads / fields.
+type Marshaler interface {
+	// Marshal marshals "v" into byte sequence.
+	Marshal(v interface{}) ([]byte, error)
+	// Unmarshal unmarshals "data" into "v".
+	// "v" must be a pointer value.
+	Unmarshal(data []byte, v interface{}) error
+	// NewDecoder returns a Decoder which reads byte sequence from "r".
+	NewDecoder(r io.Reader) Decoder
+	// NewEncoder returns an Encoder which writes bytes sequence into "w".
+	NewEncoder(w io.Writer) Encoder
+	// ContentType returns the Content-Type which this marshaler is responsible for.
+	// The parameter describes the type which is being marshalled, which can sometimes
+	// affect the content type returned.
+	ContentType(v interface{}) string
+}
+
+// Decoder decodes a byte sequence
+type Decoder interface {
+	Decode(v interface{}) error
+}
+
+// Encoder encodes gRPC payloads / fields into byte sequence.
+type Encoder interface {
+	Encode(v interface{}) error
+}
+
+// DecoderFunc adapts an decoder function into Decoder.
+type DecoderFunc func(v interface{}) error
+
+// Decode delegates invocations to the underlying function itself.
+func (f DecoderFunc) Decode(v interface{}) error { return f(v) }
+
+// EncoderFunc adapts an encoder function into Encoder
+type EncoderFunc func(v interface{}) error
+
+// Encode delegates invocations to the underlying function itself.
+func (f EncoderFunc) Encode(v interface{}) error { return f(v) }
+
+// Delimited defines the streaming delimiter.
+type Delimited interface {
+	// Delimiter returns the record separator for the stream.
+	Delimiter() []byte
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/marshaler_registry.go

@@ -0,0 +1,109 @@
+package runtime
+
+import (
+	"errors"
+	"mime"
+	"net/http"
+
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/protobuf/encoding/protojson"
+)
+
+// MIMEWildcard is the fallback MIME type used for requests which do not match
+// a registered MIME type.
+const MIMEWildcard = "*"
+
+var (
+	acceptHeader      = http.CanonicalHeaderKey("Accept")
+	contentTypeHeader = http.CanonicalHeaderKey("Content-Type")
+
+	defaultMarshaler = &HTTPBodyMarshaler{
+		Marshaler: &JSONPb{
+			MarshalOptions: protojson.MarshalOptions{
+				EmitUnpopulated: true,
+			},
+			UnmarshalOptions: protojson.UnmarshalOptions{
+				DiscardUnknown: true,
+			},
+		},
+	}
+)
+
+// MarshalerForRequest returns the inbound/outbound marshalers for this request.
+// It checks the registry on the ServeMux for the MIME type set by the Content-Type header.
+// If it isn't set (or the request Content-Type is empty), checks for "*".
+// If there are multiple Content-Type headers set, choose the first one that it can
+// exactly match in the registry.
+// Otherwise, it follows the above logic for "*"/InboundMarshaler/OutboundMarshaler.
+func MarshalerForRequest(mux *ServeMux, r *http.Request) (inbound Marshaler, outbound Marshaler) {
+	for _, acceptVal := range r.Header[acceptHeader] {
+		if m, ok := mux.marshalers.mimeMap[acceptVal]; ok {
+			outbound = m
+			break
+		}
+	}
+
+	for _, contentTypeVal := range r.Header[contentTypeHeader] {
+		contentType, _, err := mime.ParseMediaType(contentTypeVal)
+		if err != nil {
+			grpclog.Infof("Failed to parse Content-Type %s: %v", contentTypeVal, err)
+			continue
+		}
+		if m, ok := mux.marshalers.mimeMap[contentType]; ok {
+			inbound = m
+			break
+		}
+	}
+
+	if inbound == nil {
+		inbound = mux.marshalers.mimeMap[MIMEWildcard]
+	}
+	if outbound == nil {
+		outbound = inbound
+	}
+
+	return inbound, outbound
+}
+
+// marshalerRegistry is a mapping from MIME types to Marshalers.
+type marshalerRegistry struct {
+	mimeMap map[string]Marshaler
+}
+
+// add adds a marshaler for a case-sensitive MIME type string ("*" to match any
+// MIME type).
+func (m marshalerRegistry) add(mime string, marshaler Marshaler) error {
+	if len(mime) == 0 {
+		return errors.New("empty MIME type")
+	}
+
+	m.mimeMap[mime] = marshaler
+
+	return nil
+}
+
+// makeMarshalerMIMERegistry returns a new registry of marshalers.
+// It allows for a mapping of case-sensitive Content-Type MIME type string to runtime.Marshaler interfaces.
+//
+// For example, you could allow the client to specify the use of the runtime.JSONPb marshaler
+// with a "application/jsonpb" Content-Type and the use of the runtime.JSONBuiltin marshaler
+// with a "application/json" Content-Type.
+// "*" can be used to match any Content-Type.
+// This can be attached to a ServerMux with the marshaler option.
+func makeMarshalerMIMERegistry() marshalerRegistry {
+	return marshalerRegistry{
+		mimeMap: map[string]Marshaler{
+			MIMEWildcard: defaultMarshaler,
+		},
+	}
+}
+
+// WithMarshalerOption returns a ServeMuxOption which associates inbound and outbound
+// Marshalers to a MIME type in mux.
+func WithMarshalerOption(mime string, marshaler Marshaler) ServeMuxOption {
+	return func(mux *ServeMux) {
+		if err := mux.marshalers.add(mime, marshaler); err != nil {
+			panic(err)
+		}
+	}
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/mux.go

@@ -0,0 +1,466 @@
+package runtime
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/http"
+	"net/textproto"
+	"regexp"
+	"strings"
+
+	"github.com/grpc-ecosystem/grpc-gateway/v2/internal/httprule"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/health/grpc_health_v1"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/proto"
+)
+
+// UnescapingMode defines the behavior of ServeMux when unescaping path parameters.
+type UnescapingMode int
+
+const (
+	// UnescapingModeLegacy is the default V2 behavior, which escapes the entire
+	// path string before doing any routing.
+	UnescapingModeLegacy UnescapingMode = iota
+
+	// UnescapingModeAllExceptReserved unescapes all path parameters except RFC 6570
+	// reserved characters.
+	UnescapingModeAllExceptReserved
+
+	// UnescapingModeAllExceptSlash unescapes URL path parameters except path
+	// separators, which will be left as "%2F".
+	UnescapingModeAllExceptSlash
+
+	// UnescapingModeAllCharacters unescapes all URL path parameters.
+	UnescapingModeAllCharacters
+
+	// UnescapingModeDefault is the default escaping type.
+	// TODO(v3): default this to UnescapingModeAllExceptReserved per grpc-httpjson-transcoding's
+	// reference implementation
+	UnescapingModeDefault = UnescapingModeLegacy
+)
+
+var encodedPathSplitter = regexp.MustCompile("(/|%2F)")
+
+// A HandlerFunc handles a specific pair of path pattern and HTTP method.
+type HandlerFunc func(w http.ResponseWriter, r *http.Request, pathParams map[string]string)
+
+// ServeMux is a request multiplexer for grpc-gateway.
+// It matches http requests to patterns and invokes the corresponding handler.
+type ServeMux struct {
+	// handlers maps HTTP method to a list of handlers.
+	handlers                  map[string][]handler
+	forwardResponseOptions    []func(context.Context, http.ResponseWriter, proto.Message) error
+	marshalers                marshalerRegistry
+	incomingHeaderMatcher     HeaderMatcherFunc
+	outgoingHeaderMatcher     HeaderMatcherFunc
+	metadataAnnotators        []func(context.Context, *http.Request) metadata.MD
+	errorHandler              ErrorHandlerFunc
+	streamErrorHandler        StreamErrorHandlerFunc
+	routingErrorHandler       RoutingErrorHandlerFunc
+	disablePathLengthFallback bool
+	unescapingMode            UnescapingMode
+}
+
+// ServeMuxOption is an option that can be given to a ServeMux on construction.
+type ServeMuxOption func(*ServeMux)
+
+// WithForwardResponseOption returns a ServeMuxOption representing the forwardResponseOption.
+//
+// forwardResponseOption is an option that will be called on the relevant context.Context,
+// http.ResponseWriter, and proto.Message before every forwarded response.
+//
+// The message may be nil in the case where just a header is being sent.
+func WithForwardResponseOption(forwardResponseOption func(context.Context, http.ResponseWriter, proto.Message) error) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.forwardResponseOptions = append(serveMux.forwardResponseOptions, forwardResponseOption)
+	}
+}
+
+// WithUnescapingMode sets the escaping type. See the definitions of UnescapingMode
+// for more information.
+func WithUnescapingMode(mode UnescapingMode) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.unescapingMode = mode
+	}
+}
+
+// SetQueryParameterParser sets the query parameter parser, used to populate message from query parameters.
+// Configuring this will mean the generated OpenAPI output is no longer correct, and it should be
+// done with careful consideration.
+func SetQueryParameterParser(queryParameterParser QueryParameterParser) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		currentQueryParser = queryParameterParser
+	}
+}
+
+// HeaderMatcherFunc checks whether a header key should be forwarded to/from gRPC context.
+type HeaderMatcherFunc func(string) (string, bool)
+
+// DefaultHeaderMatcher is used to pass http request headers to/from gRPC context. This adds permanent HTTP header
+// keys (as specified by the IANA, e.g: Accept, Cookie, Host) to the gRPC metadata with the grpcgateway- prefix. If you want to know which headers are considered permanent, you can view the isPermanentHTTPHeader function.
+// HTTP headers that start with 'Grpc-Metadata-' are mapped to gRPC metadata after removing the prefix 'Grpc-Metadata-'.
+// Other headers are not added to the gRPC metadata.
+func DefaultHeaderMatcher(key string) (string, bool) {
+	switch key = textproto.CanonicalMIMEHeaderKey(key); {
+	case isPermanentHTTPHeader(key):
+		return MetadataPrefix + key, true
+	case strings.HasPrefix(key, MetadataHeaderPrefix):
+		return key[len(MetadataHeaderPrefix):], true
+	}
+	return "", false
+}
+
+// WithIncomingHeaderMatcher returns a ServeMuxOption representing a headerMatcher for incoming request to gateway.
+//
+// This matcher will be called with each header in http.Request. If matcher returns true, that header will be
+// passed to gRPC context. To transform the header before passing to gRPC context, matcher should return modified header.
+func WithIncomingHeaderMatcher(fn HeaderMatcherFunc) ServeMuxOption {
+	for _, header := range fn.matchedMalformedHeaders() {
+		grpclog.Warningf("The configured forwarding filter would allow %q to be sent to the gRPC server, which will likely cause errors. See https://github.com/grpc/grpc-go/pull/4803#issuecomment-986093310 for more information.", header)
+	}
+
+	return func(mux *ServeMux) {
+		mux.incomingHeaderMatcher = fn
+	}
+}
+
+// matchedMalformedHeaders returns the malformed headers that would be forwarded to gRPC server.
+func (fn HeaderMatcherFunc) matchedMalformedHeaders() []string {
+	if fn == nil {
+		return nil
+	}
+	headers := make([]string, 0)
+	for header := range malformedHTTPHeaders {
+		out, accept := fn(header)
+		if accept && isMalformedHTTPHeader(out) {
+			headers = append(headers, out)
+		}
+	}
+	return headers
+}
+
+// WithOutgoingHeaderMatcher returns a ServeMuxOption representing a headerMatcher for outgoing response from gateway.
+//
+// This matcher will be called with each header in response header metadata. If matcher returns true, that header will be
+// passed to http response returned from gateway. To transform the header before passing to response,
+// matcher should return modified header.
+func WithOutgoingHeaderMatcher(fn HeaderMatcherFunc) ServeMuxOption {
+	return func(mux *ServeMux) {
+		mux.outgoingHeaderMatcher = fn
+	}
+}
+
+// WithMetadata returns a ServeMuxOption for passing metadata to a gRPC context.
+//
+// This can be used by services that need to read from http.Request and modify gRPC context. A common use case
+// is reading token from cookie and adding it in gRPC context.
+func WithMetadata(annotator func(context.Context, *http.Request) metadata.MD) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.metadataAnnotators = append(serveMux.metadataAnnotators, annotator)
+	}
+}
+
+// WithErrorHandler returns a ServeMuxOption for configuring a custom error handler.
+//
+// This can be used to configure a custom error response.
+func WithErrorHandler(fn ErrorHandlerFunc) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.errorHandler = fn
+	}
+}
+
+// WithStreamErrorHandler returns a ServeMuxOption that will use the given custom stream
+// error handler, which allows for customizing the error trailer for server-streaming
+// calls.
+//
+// For stream errors that occur before any response has been written, the mux's
+// ErrorHandler will be invoked. However, once data has been written, the errors must
+// be handled differently: they must be included in the response body. The response body's
+// final message will include the error details returned by the stream error handler.
+func WithStreamErrorHandler(fn StreamErrorHandlerFunc) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.streamErrorHandler = fn
+	}
+}
+
+// WithRoutingErrorHandler returns a ServeMuxOption for configuring a custom error handler to  handle http routing errors.
+//
+// Method called for errors which can happen before gRPC route selected or executed.
+// The following error codes: StatusMethodNotAllowed StatusNotFound StatusBadRequest
+func WithRoutingErrorHandler(fn RoutingErrorHandlerFunc) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.routingErrorHandler = fn
+	}
+}
+
+// WithDisablePathLengthFallback returns a ServeMuxOption for disable path length fallback.
+func WithDisablePathLengthFallback() ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.disablePathLengthFallback = true
+	}
+}
+
+// WithHealthEndpointAt returns a ServeMuxOption that will add an endpoint to the created ServeMux at the path specified by endpointPath.
+// When called the handler will forward the request to the upstream grpc service health check (defined in the
+// gRPC Health Checking Protocol).
+//
+// See here https://grpc-ecosystem.github.io/grpc-gateway/docs/operations/health_check/ for more information on how
+// to setup the protocol in the grpc server.
+//
+// If you define a service as query parameter, this will also be forwarded as service in the HealthCheckRequest.
+func WithHealthEndpointAt(healthCheckClient grpc_health_v1.HealthClient, endpointPath string) ServeMuxOption {
+	return func(s *ServeMux) {
+		// error can be ignored since pattern is definitely valid
+		_ = s.HandlePath(
+			http.MethodGet, endpointPath, func(w http.ResponseWriter, r *http.Request, _ map[string]string,
+			) {
+				_, outboundMarshaler := MarshalerForRequest(s, r)
+
+				resp, err := healthCheckClient.Check(r.Context(), &grpc_health_v1.HealthCheckRequest{
+					Service: r.URL.Query().Get("service"),
+				})
+				if err != nil {
+					s.errorHandler(r.Context(), s, outboundMarshaler, w, r, err)
+					return
+				}
+
+				w.Header().Set("Content-Type", "application/json")
+
+				if resp.GetStatus() != grpc_health_v1.HealthCheckResponse_SERVING {
+					switch resp.GetStatus() {
+					case grpc_health_v1.HealthCheckResponse_NOT_SERVING, grpc_health_v1.HealthCheckResponse_UNKNOWN:
+						err = status.Error(codes.Unavailable, resp.String())
+					case grpc_health_v1.HealthCheckResponse_SERVICE_UNKNOWN:
+						err = status.Error(codes.NotFound, resp.String())
+					}
+
+					s.errorHandler(r.Context(), s, outboundMarshaler, w, r, err)
+					return
+				}
+
+				_ = outboundMarshaler.NewEncoder(w).Encode(resp)
+			})
+	}
+}
+
+// WithHealthzEndpoint returns a ServeMuxOption that will add a /healthz endpoint to the created ServeMux.
+//
+// See WithHealthEndpointAt for the general implementation.
+func WithHealthzEndpoint(healthCheckClient grpc_health_v1.HealthClient) ServeMuxOption {
+	return WithHealthEndpointAt(healthCheckClient, "/healthz")
+}
+
+// NewServeMux returns a new ServeMux whose internal mapping is empty.
+func NewServeMux(opts ...ServeMuxOption) *ServeMux {
+	serveMux := &ServeMux{
+		handlers:               make(map[string][]handler),
+		forwardResponseOptions: make([]func(context.Context, http.ResponseWriter, proto.Message) error, 0),
+		marshalers:             makeMarshalerMIMERegistry(),
+		errorHandler:           DefaultHTTPErrorHandler,
+		streamErrorHandler:     DefaultStreamErrorHandler,
+		routingErrorHandler:    DefaultRoutingErrorHandler,
+		unescapingMode:         UnescapingModeDefault,
+	}
+
+	for _, opt := range opts {
+		opt(serveMux)
+	}
+
+	if serveMux.incomingHeaderMatcher == nil {
+		serveMux.incomingHeaderMatcher = DefaultHeaderMatcher
+	}
+
+	if serveMux.outgoingHeaderMatcher == nil {
+		serveMux.outgoingHeaderMatcher = func(key string) (string, bool) {
+			return fmt.Sprintf("%s%s", MetadataHeaderPrefix, key), true
+		}
+	}
+
+	return serveMux
+}
+
+// Handle associates "h" to the pair of HTTP method and path pattern.
+func (s *ServeMux) Handle(meth string, pat Pattern, h HandlerFunc) {
+	s.handlers[meth] = append([]handler{{pat: pat, h: h}}, s.handlers[meth]...)
+}
+
+// HandlePath allows users to configure custom path handlers.
+// refer: https://grpc-ecosystem.github.io/grpc-gateway/docs/operations/inject_router/
+func (s *ServeMux) HandlePath(meth string, pathPattern string, h HandlerFunc) error {
+	compiler, err := httprule.Parse(pathPattern)
+	if err != nil {
+		return fmt.Errorf("parsing path pattern: %w", err)
+	}
+	tp := compiler.Compile()
+	pattern, err := NewPattern(tp.Version, tp.OpCodes, tp.Pool, tp.Verb)
+	if err != nil {
+		return fmt.Errorf("creating new pattern: %w", err)
+	}
+	s.Handle(meth, pattern, h)
+	return nil
+}
+
+// ServeHTTP dispatches the request to the first handler whose pattern matches to r.Method and r.URL.Path.
+func (s *ServeMux) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+
+	path := r.URL.Path
+	if !strings.HasPrefix(path, "/") {
+		_, outboundMarshaler := MarshalerForRequest(s, r)
+		s.routingErrorHandler(ctx, s, outboundMarshaler, w, r, http.StatusBadRequest)
+		return
+	}
+
+	// TODO(v3): remove UnescapingModeLegacy
+	if s.unescapingMode != UnescapingModeLegacy && r.URL.RawPath != "" {
+		path = r.URL.RawPath
+	}
+
+	if override := r.Header.Get("X-HTTP-Method-Override"); override != "" && s.isPathLengthFallback(r) {
+		r.Method = strings.ToUpper(override)
+		if err := r.ParseForm(); err != nil {
+			_, outboundMarshaler := MarshalerForRequest(s, r)
+			sterr := status.Error(codes.InvalidArgument, err.Error())
+			s.errorHandler(ctx, s, outboundMarshaler, w, r, sterr)
+			return
+		}
+	}
+
+	var pathComponents []string
+	// since in UnescapeModeLegacy, the URL will already have been fully unescaped, if we also split on "%2F"
+	// in this escaping mode we would be double unescaping but in UnescapingModeAllCharacters, we still do as the
+	// path is the RawPath (i.e. unescaped). That does mean that the behavior of this function will change its default
+	// behavior when the UnescapingModeDefault gets changed from UnescapingModeLegacy to UnescapingModeAllExceptReserved
+	if s.unescapingMode == UnescapingModeAllCharacters {
+		pathComponents = encodedPathSplitter.Split(path[1:], -1)
+	} else {
+		pathComponents = strings.Split(path[1:], "/")
+	}
+
+	lastPathComponent := pathComponents[len(pathComponents)-1]
+
+	for _, h := range s.handlers[r.Method] {
+		// If the pattern has a verb, explicitly look for a suffix in the last
+		// component that matches a colon plus the verb. This allows us to
+		// handle some cases that otherwise can't be correctly handled by the
+		// former LastIndex case, such as when the verb literal itself contains
+		// a colon. This should work for all cases that have run through the
+		// parser because we know what verb we're looking for, however, there
+		// are still some cases that the parser itself cannot disambiguate. See
+		// the comment there if interested.
+
+		var verb string
+		patVerb := h.pat.Verb()
+
+		idx := -1
+		if patVerb != "" && strings.HasSuffix(lastPathComponent, ":"+patVerb) {
+			idx = len(lastPathComponent) - len(patVerb) - 1
+		}
+		if idx == 0 {
+			_, outboundMarshaler := MarshalerForRequest(s, r)
+			s.routingErrorHandler(ctx, s, outboundMarshaler, w, r, http.StatusNotFound)
+			return
+		}
+
+		comps := make([]string, len(pathComponents))
+		copy(comps, pathComponents)
+
+		if idx > 0 {
+			comps[len(comps)-1], verb = lastPathComponent[:idx], lastPathComponent[idx+1:]
+		}
+
+		pathParams, err := h.pat.MatchAndEscape(comps, verb, s.unescapingMode)
+		if err != nil {
+			var mse MalformedSequenceError
+			if ok := errors.As(err, &mse); ok {
+				_, outboundMarshaler := MarshalerForRequest(s, r)
+				s.errorHandler(ctx, s, outboundMarshaler, w, r, &HTTPStatusError{
+					HTTPStatus: http.StatusBadRequest,
+					Err:        mse,
+				})
+			}
+			continue
+		}
+		h.h(w, r, pathParams)
+		return
+	}
+
+	// if no handler has found for the request, lookup for other methods
+	// to handle POST -> GET fallback if the request is subject to path
+	// length fallback.
+	// Note we are not eagerly checking the request here as we want to return the
+	// right HTTP status code, and we need to process the fallback candidates in
+	// order to do that.
+	for m, handlers := range s.handlers {
+		if m == r.Method {
+			continue
+		}
+		for _, h := range handlers {
+			var verb string
+			patVerb := h.pat.Verb()
+
+			idx := -1
+			if patVerb != "" && strings.HasSuffix(lastPathComponent, ":"+patVerb) {
+				idx = len(lastPathComponent) - len(patVerb) - 1
+			}
+
+			comps := make([]string, len(pathComponents))
+			copy(comps, pathComponents)
+
+			if idx > 0 {
+				comps[len(comps)-1], verb = lastPathComponent[:idx], lastPathComponent[idx+1:]
+			}
+
+			pathParams, err := h.pat.MatchAndEscape(comps, verb, s.unescapingMode)
+			if err != nil {
+				var mse MalformedSequenceError
+				if ok := errors.As(err, &mse); ok {
+					_, outboundMarshaler := MarshalerForRequest(s, r)
+					s.errorHandler(ctx, s, outboundMarshaler, w, r, &HTTPStatusError{
+						HTTPStatus: http.StatusBadRequest,
+						Err:        mse,
+					})
+				}
+				continue
+			}
+
+			// X-HTTP-Method-Override is optional. Always allow fallback to POST.
+			// Also, only consider POST -> GET fallbacks, and avoid falling back to
+			// potentially dangerous operations like DELETE.
+			if s.isPathLengthFallback(r) && m == http.MethodGet {
+				if err := r.ParseForm(); err != nil {
+					_, outboundMarshaler := MarshalerForRequest(s, r)
+					sterr := status.Error(codes.InvalidArgument, err.Error())
+					s.errorHandler(ctx, s, outboundMarshaler, w, r, sterr)
+					return
+				}
+				h.h(w, r, pathParams)
+				return
+			}
+			_, outboundMarshaler := MarshalerForRequest(s, r)
+			s.routingErrorHandler(ctx, s, outboundMarshaler, w, r, http.StatusMethodNotAllowed)
+			return
+		}
+	}
+
+	_, outboundMarshaler := MarshalerForRequest(s, r)
+	s.routingErrorHandler(ctx, s, outboundMarshaler, w, r, http.StatusNotFound)
+}
+
+// GetForwardResponseOptions returns the ForwardResponseOptions associated with this ServeMux.
+func (s *ServeMux) GetForwardResponseOptions() []func(context.Context, http.ResponseWriter, proto.Message) error {
+	return s.forwardResponseOptions
+}
+
+func (s *ServeMux) isPathLengthFallback(r *http.Request) bool {
+	return !s.disablePathLengthFallback && r.Method == "POST" && r.Header.Get("Content-Type") == "application/x-www-form-urlencoded"
+}
+
+type handler struct {
+	pat Pattern
+	h   HandlerFunc
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/pattern.go

@@ -0,0 +1,381 @@
+package runtime
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/grpc-ecosystem/grpc-gateway/v2/utilities"
+	"google.golang.org/grpc/grpclog"
+)
+
+var (
+	// ErrNotMatch indicates that the given HTTP request path does not match to the pattern.
+	ErrNotMatch = errors.New("not match to the path pattern")
+	// ErrInvalidPattern indicates that the given definition of Pattern is not valid.
+	ErrInvalidPattern = errors.New("invalid pattern")
+)
+
+type MalformedSequenceError string
+
+func (e MalformedSequenceError) Error() string {
+	return "malformed path escape " + strconv.Quote(string(e))
+}
+
+type op struct {
+	code    utilities.OpCode
+	operand int
+}
+
+// Pattern is a template pattern of http request paths defined in
+// https://github.com/googleapis/googleapis/blob/master/google/api/http.proto
+type Pattern struct {
+	// ops is a list of operations
+	ops []op
+	// pool is a constant pool indexed by the operands or vars.
+	pool []string
+	// vars is a list of variables names to be bound by this pattern
+	vars []string
+	// stacksize is the max depth of the stack
+	stacksize int
+	// tailLen is the length of the fixed-size segments after a deep wildcard
+	tailLen int
+	// verb is the VERB part of the path pattern. It is empty if the pattern does not have VERB part.
+	verb string
+}
+
+// NewPattern returns a new Pattern from the given definition values.
+// "ops" is a sequence of op codes. "pool" is a constant pool.
+// "verb" is the verb part of the pattern. It is empty if the pattern does not have the part.
+// "version" must be 1 for now.
+// It returns an error if the given definition is invalid.
+func NewPattern(version int, ops []int, pool []string, verb string) (Pattern, error) {
+	if version != 1 {
+		grpclog.Infof("unsupported version: %d", version)
+		return Pattern{}, ErrInvalidPattern
+	}
+
+	l := len(ops)
+	if l%2 != 0 {
+		grpclog.Infof("odd number of ops codes: %d", l)
+		return Pattern{}, ErrInvalidPattern
+	}
+
+	var (
+		typedOps        []op
+		stack, maxstack int
+		tailLen         int
+		pushMSeen       bool
+		vars            []string
+	)
+	for i := 0; i < l; i += 2 {
+		op := op{code: utilities.OpCode(ops[i]), operand: ops[i+1]}
+		switch op.code {
+		case utilities.OpNop:
+			continue
+		case utilities.OpPush:
+			if pushMSeen {
+				tailLen++
+			}
+			stack++
+		case utilities.OpPushM:
+			if pushMSeen {
+				grpclog.Infof("pushM appears twice")
+				return Pattern{}, ErrInvalidPattern
+			}
+			pushMSeen = true
+			stack++
+		case utilities.OpLitPush:
+			if op.operand < 0 || len(pool) <= op.operand {
+				grpclog.Infof("negative literal index: %d", op.operand)
+				return Pattern{}, ErrInvalidPattern
+			}
+			if pushMSeen {
+				tailLen++
+			}
+			stack++
+		case utilities.OpConcatN:
+			if op.operand <= 0 {
+				grpclog.Infof("negative concat size: %d", op.operand)
+				return Pattern{}, ErrInvalidPattern
+			}
+			stack -= op.operand
+			if stack < 0 {
+				grpclog.Info("stack underflow")
+				return Pattern{}, ErrInvalidPattern
+			}
+			stack++
+		case utilities.OpCapture:
+			if op.operand < 0 || len(pool) <= op.operand {
+				grpclog.Infof("variable name index out of bound: %d", op.operand)
+				return Pattern{}, ErrInvalidPattern
+			}
+			v := pool[op.operand]
+			op.operand = len(vars)
+			vars = append(vars, v)
+			stack--
+			if stack < 0 {
+				grpclog.Infof("stack underflow")
+				return Pattern{}, ErrInvalidPattern
+			}
+		default:
+			grpclog.Infof("invalid opcode: %d", op.code)
+			return Pattern{}, ErrInvalidPattern
+		}
+
+		if maxstack < stack {
+			maxstack = stack
+		}
+		typedOps = append(typedOps, op)
+	}
+	return Pattern{
+		ops:       typedOps,
+		pool:      pool,
+		vars:      vars,
+		stacksize: maxstack,
+		tailLen:   tailLen,
+		verb:      verb,
+	}, nil
+}
+
+// MustPattern is a helper function which makes it easier to call NewPattern in variable initialization.
+func MustPattern(p Pattern, err error) Pattern {
+	if err != nil {
+		grpclog.Fatalf("Pattern initialization failed: %v", err)
+	}
+	return p
+}
+
+// MatchAndEscape examines components to determine if they match to a Pattern.
+// MatchAndEscape will return an error if no Patterns matched or if a pattern
+// matched but contained malformed escape sequences. If successful, the function
+// returns a mapping from field paths to their captured values.
+func (p Pattern) MatchAndEscape(components []string, verb string, unescapingMode UnescapingMode) (map[string]string, error) {
+	if p.verb != verb {
+		if p.verb != "" {
+			return nil, ErrNotMatch
+		}
+		if len(components) == 0 {
+			components = []string{":" + verb}
+		} else {
+			components = append([]string{}, components...)
+			components[len(components)-1] += ":" + verb
+		}
+	}
+
+	var pos int
+	stack := make([]string, 0, p.stacksize)
+	captured := make([]string, len(p.vars))
+	l := len(components)
+	for _, op := range p.ops {
+		var err error
+
+		switch op.code {
+		case utilities.OpNop:
+			continue
+		case utilities.OpPush, utilities.OpLitPush:
+			if pos >= l {
+				return nil, ErrNotMatch
+			}
+			c := components[pos]
+			if op.code == utilities.OpLitPush {
+				if lit := p.pool[op.operand]; c != lit {
+					return nil, ErrNotMatch
+				}
+			} else if op.code == utilities.OpPush {
+				if c, err = unescape(c, unescapingMode, false); err != nil {
+					return nil, err
+				}
+			}
+			stack = append(stack, c)
+			pos++
+		case utilities.OpPushM:
+			end := len(components)
+			if end < pos+p.tailLen {
+				return nil, ErrNotMatch
+			}
+			end -= p.tailLen
+			c := strings.Join(components[pos:end], "/")
+			if c, err = unescape(c, unescapingMode, true); err != nil {
+				return nil, err
+			}
+			stack = append(stack, c)
+			pos = end
+		case utilities.OpConcatN:
+			n := op.operand
+			l := len(stack) - n
+			stack = append(stack[:l], strings.Join(stack[l:], "/"))
+		case utilities.OpCapture:
+			n := len(stack) - 1
+			captured[op.operand] = stack[n]
+			stack = stack[:n]
+		}
+	}
+	if pos < l {
+		return nil, ErrNotMatch
+	}
+	bindings := make(map[string]string)
+	for i, val := range captured {
+		bindings[p.vars[i]] = val
+	}
+	return bindings, nil
+}
+
+// MatchAndEscape examines components to determine if they match to a Pattern.
+// It will never perform per-component unescaping (see: UnescapingModeLegacy).
+// MatchAndEscape will return an error if no Patterns matched. If successful,
+// the function returns a mapping from field paths to their captured values.
+//
+// Deprecated: Use MatchAndEscape.
+func (p Pattern) Match(components []string, verb string) (map[string]string, error) {
+	return p.MatchAndEscape(components, verb, UnescapingModeDefault)
+}
+
+// Verb returns the verb part of the Pattern.
+func (p Pattern) Verb() string { return p.verb }
+
+func (p Pattern) String() string {
+	var stack []string
+	for _, op := range p.ops {
+		switch op.code {
+		case utilities.OpNop:
+			continue
+		case utilities.OpPush:
+			stack = append(stack, "*")
+		case utilities.OpLitPush:
+			stack = append(stack, p.pool[op.operand])
+		case utilities.OpPushM:
+			stack = append(stack, "**")
+		case utilities.OpConcatN:
+			n := op.operand
+			l := len(stack) - n
+			stack = append(stack[:l], strings.Join(stack[l:], "/"))
+		case utilities.OpCapture:
+			n := len(stack) - 1
+			stack[n] = fmt.Sprintf("{%s=%s}", p.vars[op.operand], stack[n])
+		}
+	}
+	segs := strings.Join(stack, "/")
+	if p.verb != "" {
+		return fmt.Sprintf("/%s:%s", segs, p.verb)
+	}
+	return "/" + segs
+}
+
+/*
+ * The following code is adopted and modified from Go's standard library
+ * and carries the attached license.
+ *
+ *     Copyright 2009 The Go Authors. All rights reserved.
+ *     Use of this source code is governed by a BSD-style
+ *     license that can be found in the LICENSE file.
+ */
+
+// ishex returns whether or not the given byte is a valid hex character
+func ishex(c byte) bool {
+	switch {
+	case '0' <= c && c <= '9':
+		return true
+	case 'a' <= c && c <= 'f':
+		return true
+	case 'A' <= c && c <= 'F':
+		return true
+	}
+	return false
+}
+
+func isRFC6570Reserved(c byte) bool {
+	switch c {
+	case '!', '#', '$', '&', '\'', '(', ')', '*',
+		'+', ',', '/', ':', ';', '=', '?', '@', '[', ']':
+		return true
+	default:
+		return false
+	}
+}
+
+// unhex converts a hex point to the bit representation
+func unhex(c byte) byte {
+	switch {
+	case '0' <= c && c <= '9':
+		return c - '0'
+	case 'a' <= c && c <= 'f':
+		return c - 'a' + 10
+	case 'A' <= c && c <= 'F':
+		return c - 'A' + 10
+	}
+	return 0
+}
+
+// shouldUnescapeWithMode returns true if the character is escapable with the
+// given mode
+func shouldUnescapeWithMode(c byte, mode UnescapingMode) bool {
+	switch mode {
+	case UnescapingModeAllExceptReserved:
+		if isRFC6570Reserved(c) {
+			return false
+		}
+	case UnescapingModeAllExceptSlash:
+		if c == '/' {
+			return false
+		}
+	case UnescapingModeAllCharacters:
+		return true
+	}
+	return true
+}
+
+// unescape unescapes a path string using the provided mode
+func unescape(s string, mode UnescapingMode, multisegment bool) (string, error) {
+	// TODO(v3): remove UnescapingModeLegacy
+	if mode == UnescapingModeLegacy {
+		return s, nil
+	}
+
+	if !multisegment {
+		mode = UnescapingModeAllCharacters
+	}
+
+	// Count %, check that they're well-formed.
+	n := 0
+	for i := 0; i < len(s); {
+		if s[i] == '%' {
+			n++
+			if i+2 >= len(s) || !ishex(s[i+1]) || !ishex(s[i+2]) {
+				s = s[i:]
+				if len(s) > 3 {
+					s = s[:3]
+				}
+
+				return "", MalformedSequenceError(s)
+			}
+			i += 3
+		} else {
+			i++
+		}
+	}
+
+	if n == 0 {
+		return s, nil
+	}
+
+	var t strings.Builder
+	t.Grow(len(s))
+	for i := 0; i < len(s); i++ {
+		switch s[i] {
+		case '%':
+			c := unhex(s[i+1])<<4 | unhex(s[i+2])
+			if shouldUnescapeWithMode(c, mode) {
+				t.WriteByte(c)
+				i += 2
+				continue
+			}
+			fallthrough
+		default:
+			t.WriteByte(s[i])
+		}
+	}
+
+	return t.String(), nil
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/proto2_convert.go

@@ -0,0 +1,80 @@
+package runtime
+
+import (
+	"google.golang.org/protobuf/proto"
+)
+
+// StringP returns a pointer to a string whose pointee is same as the given string value.
+func StringP(val string) (*string, error) {
+	return proto.String(val), nil
+}
+
+// BoolP parses the given string representation of a boolean value,
+// and returns a pointer to a bool whose value is same as the parsed value.
+func BoolP(val string) (*bool, error) {
+	b, err := Bool(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Bool(b), nil
+}
+
+// Float64P parses the given string representation of a floating point number,
+// and returns a pointer to a float64 whose value is same as the parsed number.
+func Float64P(val string) (*float64, error) {
+	f, err := Float64(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Float64(f), nil
+}
+
+// Float32P parses the given string representation of a floating point number,
+// and returns a pointer to a float32 whose value is same as the parsed number.
+func Float32P(val string) (*float32, error) {
+	f, err := Float32(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Float32(f), nil
+}
+
+// Int64P parses the given string representation of an integer
+// and returns a pointer to a int64 whose value is same as the parsed integer.
+func Int64P(val string) (*int64, error) {
+	i, err := Int64(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Int64(i), nil
+}
+
+// Int32P parses the given string representation of an integer
+// and returns a pointer to a int32 whose value is same as the parsed integer.
+func Int32P(val string) (*int32, error) {
+	i, err := Int32(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Int32(i), err
+}
+
+// Uint64P parses the given string representation of an integer
+// and returns a pointer to a uint64 whose value is same as the parsed integer.
+func Uint64P(val string) (*uint64, error) {
+	i, err := Uint64(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Uint64(i), err
+}
+
+// Uint32P parses the given string representation of an integer
+// and returns a pointer to a uint32 whose value is same as the parsed integer.
+func Uint32P(val string) (*uint32, error) {
+	i, err := Uint32(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Uint32(i), err
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/query.go

@@ -0,0 +1,338 @@
+package runtime
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/grpc-ecosystem/grpc-gateway/v2/utilities"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/reflect/protoregistry"
+	"google.golang.org/protobuf/types/known/durationpb"
+	field_mask "google.golang.org/protobuf/types/known/fieldmaskpb"
+	"google.golang.org/protobuf/types/known/structpb"
+	"google.golang.org/protobuf/types/known/timestamppb"
+	"google.golang.org/protobuf/types/known/wrapperspb"
+)
+
+var valuesKeyRegexp = regexp.MustCompile(`^(.*)\[(.*)\]$`)
+
+var currentQueryParser QueryParameterParser = &DefaultQueryParser{}
+
+// QueryParameterParser defines interface for all query parameter parsers
+type QueryParameterParser interface {
+	Parse(msg proto.Message, values url.Values, filter *utilities.DoubleArray) error
+}
+
+// PopulateQueryParameters parses query parameters
+// into "msg" using current query parser
+func PopulateQueryParameters(msg proto.Message, values url.Values, filter *utilities.DoubleArray) error {
+	return currentQueryParser.Parse(msg, values, filter)
+}
+
+// DefaultQueryParser is a QueryParameterParser which implements the default
+// query parameters parsing behavior.
+//
+// See https://github.com/grpc-ecosystem/grpc-gateway/issues/2632 for more context.
+type DefaultQueryParser struct{}
+
+// Parse populates "values" into "msg".
+// A value is ignored if its key starts with one of the elements in "filter".
+func (*DefaultQueryParser) Parse(msg proto.Message, values url.Values, filter *utilities.DoubleArray) error {
+	for key, values := range values {
+		if match := valuesKeyRegexp.FindStringSubmatch(key); len(match) == 3 {
+			key = match[1]
+			values = append([]string{match[2]}, values...)
+		}
+		fieldPath := strings.Split(key, ".")
+		if filter.HasCommonPrefix(fieldPath) {
+			continue
+		}
+		if err := populateFieldValueFromPath(msg.ProtoReflect(), fieldPath, values); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// PopulateFieldFromPath sets a value in a nested Protobuf structure.
+func PopulateFieldFromPath(msg proto.Message, fieldPathString string, value string) error {
+	fieldPath := strings.Split(fieldPathString, ".")
+	return populateFieldValueFromPath(msg.ProtoReflect(), fieldPath, []string{value})
+}
+
+func populateFieldValueFromPath(msgValue protoreflect.Message, fieldPath []string, values []string) error {
+	if len(fieldPath) < 1 {
+		return errors.New("no field path")
+	}
+	if len(values) < 1 {
+		return errors.New("no value provided")
+	}
+
+	var fieldDescriptor protoreflect.FieldDescriptor
+	for i, fieldName := range fieldPath {
+		fields := msgValue.Descriptor().Fields()
+
+		// Get field by name
+		fieldDescriptor = fields.ByName(protoreflect.Name(fieldName))
+		if fieldDescriptor == nil {
+			fieldDescriptor = fields.ByJSONName(fieldName)
+			if fieldDescriptor == nil {
+				// We're not returning an error here because this could just be
+				// an extra query parameter that isn't part of the request.
+				grpclog.Infof("field not found in %q: %q", msgValue.Descriptor().FullName(), strings.Join(fieldPath, "."))
+				return nil
+			}
+		}
+
+		// If this is the last element, we're done
+		if i == len(fieldPath)-1 {
+			break
+		}
+
+		// Only singular message fields are allowed
+		if fieldDescriptor.Message() == nil || fieldDescriptor.Cardinality() == protoreflect.Repeated {
+			return fmt.Errorf("invalid path: %q is not a message", fieldName)
+		}
+
+		// Get the nested message
+		msgValue = msgValue.Mutable(fieldDescriptor).Message()
+	}
+
+	// Check if oneof already set
+	if of := fieldDescriptor.ContainingOneof(); of != nil {
+		if f := msgValue.WhichOneof(of); f != nil {
+			return fmt.Errorf("field already set for oneof %q", of.FullName().Name())
+		}
+	}
+
+	switch {
+	case fieldDescriptor.IsList():
+		return populateRepeatedField(fieldDescriptor, msgValue.Mutable(fieldDescriptor).List(), values)
+	case fieldDescriptor.IsMap():
+		return populateMapField(fieldDescriptor, msgValue.Mutable(fieldDescriptor).Map(), values)
+	}
+
+	if len(values) > 1 {
+		return fmt.Errorf("too many values for field %q: %s", fieldDescriptor.FullName().Name(), strings.Join(values, ", "))
+	}
+
+	return populateField(fieldDescriptor, msgValue, values[0])
+}
+
+func populateField(fieldDescriptor protoreflect.FieldDescriptor, msgValue protoreflect.Message, value string) error {
+	v, err := parseField(fieldDescriptor, value)
+	if err != nil {
+		return fmt.Errorf("parsing field %q: %w", fieldDescriptor.FullName().Name(), err)
+	}
+
+	msgValue.Set(fieldDescriptor, v)
+	return nil
+}
+
+func populateRepeatedField(fieldDescriptor protoreflect.FieldDescriptor, list protoreflect.List, values []string) error {
+	for _, value := range values {
+		v, err := parseField(fieldDescriptor, value)
+		if err != nil {
+			return fmt.Errorf("parsing list %q: %w", fieldDescriptor.FullName().Name(), err)
+		}
+		list.Append(v)
+	}
+
+	return nil
+}
+
+func populateMapField(fieldDescriptor protoreflect.FieldDescriptor, mp protoreflect.Map, values []string) error {
+	if len(values) != 2 {
+		return fmt.Errorf("more than one value provided for key %q in map %q", values[0], fieldDescriptor.FullName())
+	}
+
+	key, err := parseField(fieldDescriptor.MapKey(), values[0])
+	if err != nil {
+		return fmt.Errorf("parsing map key %q: %w", fieldDescriptor.FullName().Name(), err)
+	}
+
+	value, err := parseField(fieldDescriptor.MapValue(), values[1])
+	if err != nil {
+		return fmt.Errorf("parsing map value %q: %w", fieldDescriptor.FullName().Name(), err)
+	}
+
+	mp.Set(key.MapKey(), value)
+
+	return nil
+}
+
+func parseField(fieldDescriptor protoreflect.FieldDescriptor, value string) (protoreflect.Value, error) {
+	switch fieldDescriptor.Kind() {
+	case protoreflect.BoolKind:
+		v, err := strconv.ParseBool(value)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		return protoreflect.ValueOfBool(v), nil
+	case protoreflect.EnumKind:
+		enum, err := protoregistry.GlobalTypes.FindEnumByName(fieldDescriptor.Enum().FullName())
+		if err != nil {
+			if errors.Is(err, protoregistry.NotFound) {
+				return protoreflect.Value{}, fmt.Errorf("enum %q is not registered", fieldDescriptor.Enum().FullName())
+			}
+			return protoreflect.Value{}, fmt.Errorf("failed to look up enum: %w", err)
+		}
+		// Look for enum by name
+		v := enum.Descriptor().Values().ByName(protoreflect.Name(value))
+		if v == nil {
+			i, err := strconv.Atoi(value)
+			if err != nil {
+				return protoreflect.Value{}, fmt.Errorf("%q is not a valid value", value)
+			}
+			// Look for enum by number
+			if v = enum.Descriptor().Values().ByNumber(protoreflect.EnumNumber(i)); v == nil {
+				return protoreflect.Value{}, fmt.Errorf("%q is not a valid value", value)
+			}
+		}
+		return protoreflect.ValueOfEnum(v.Number()), nil
+	case protoreflect.Int32Kind, protoreflect.Sint32Kind, protoreflect.Sfixed32Kind:
+		v, err := strconv.ParseInt(value, 10, 32)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		return protoreflect.ValueOfInt32(int32(v)), nil
+	case protoreflect.Int64Kind, protoreflect.Sint64Kind, protoreflect.Sfixed64Kind:
+		v, err := strconv.ParseInt(value, 10, 64)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		return protoreflect.ValueOfInt64(v), nil
+	case protoreflect.Uint32Kind, protoreflect.Fixed32Kind:
+		v, err := strconv.ParseUint(value, 10, 32)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		return protoreflect.ValueOfUint32(uint32(v)), nil
+	case protoreflect.Uint64Kind, protoreflect.Fixed64Kind:
+		v, err := strconv.ParseUint(value, 10, 64)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		return protoreflect.ValueOfUint64(v), nil
+	case protoreflect.FloatKind:
+		v, err := strconv.ParseFloat(value, 32)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		return protoreflect.ValueOfFloat32(float32(v)), nil
+	case protoreflect.DoubleKind:
+		v, err := strconv.ParseFloat(value, 64)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		return protoreflect.ValueOfFloat64(v), nil
+	case protoreflect.StringKind:
+		return protoreflect.ValueOfString(value), nil
+	case protoreflect.BytesKind:
+		v, err := Bytes(value)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		return protoreflect.ValueOfBytes(v), nil
+	case protoreflect.MessageKind, protoreflect.GroupKind:
+		return parseMessage(fieldDescriptor.Message(), value)
+	default:
+		panic(fmt.Sprintf("unknown field kind: %v", fieldDescriptor.Kind()))
+	}
+}
+
+func parseMessage(msgDescriptor protoreflect.MessageDescriptor, value string) (protoreflect.Value, error) {
+	var msg proto.Message
+	switch msgDescriptor.FullName() {
+	case "google.protobuf.Timestamp":
+		t, err := time.Parse(time.RFC3339Nano, value)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = timestamppb.New(t)
+	case "google.protobuf.Duration":
+		d, err := time.ParseDuration(value)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = durationpb.New(d)
+	case "google.protobuf.DoubleValue":
+		v, err := strconv.ParseFloat(value, 64)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = wrapperspb.Double(v)
+	case "google.protobuf.FloatValue":
+		v, err := strconv.ParseFloat(value, 32)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = wrapperspb.Float(float32(v))
+	case "google.protobuf.Int64Value":
+		v, err := strconv.ParseInt(value, 10, 64)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = wrapperspb.Int64(v)
+	case "google.protobuf.Int32Value":
+		v, err := strconv.ParseInt(value, 10, 32)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = wrapperspb.Int32(int32(v))
+	case "google.protobuf.UInt64Value":
+		v, err := strconv.ParseUint(value, 10, 64)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = wrapperspb.UInt64(v)
+	case "google.protobuf.UInt32Value":
+		v, err := strconv.ParseUint(value, 10, 32)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = wrapperspb.UInt32(uint32(v))
+	case "google.protobuf.BoolValue":
+		v, err := strconv.ParseBool(value)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = wrapperspb.Bool(v)
+	case "google.protobuf.StringValue":
+		msg = wrapperspb.String(value)
+	case "google.protobuf.BytesValue":
+		v, err := Bytes(value)
+		if err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = wrapperspb.Bytes(v)
+	case "google.protobuf.FieldMask":
+		fm := &field_mask.FieldMask{}
+		fm.Paths = append(fm.Paths, strings.Split(value, ",")...)
+		msg = fm
+	case "google.protobuf.Value":
+		var v structpb.Value
+		if err := protojson.Unmarshal([]byte(value), &v); err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = &v
+	case "google.protobuf.Struct":
+		var v structpb.Struct
+		if err := protojson.Unmarshal([]byte(value), &v); err != nil {
+			return protoreflect.Value{}, err
+		}
+		msg = &v
+	default:
+		return protoreflect.Value{}, fmt.Errorf("unsupported message type: %q", string(msgDescriptor.FullName()))
+	}
+
+	return protoreflect.ValueOfMessage(msg.ProtoReflect()), nil
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/utilities/BUILD.bazel

@@ -0,0 +1,31 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+package(default_visibility = ["//visibility:public"])
+
+go_library(
+    name = "utilities",
+    srcs = [
+        "doc.go",
+        "pattern.go",
+        "readerfactory.go",
+        "string_array_flag.go",
+        "trie.go",
+    ],
+    importpath = "github.com/grpc-ecosystem/grpc-gateway/v2/utilities",
+)
+
+go_test(
+    name = "utilities_test",
+    size = "small",
+    srcs = [
+        "string_array_flag_test.go",
+        "trie_test.go",
+    ],
+    deps = [":utilities"],
+)
+
+alias(
+    name = "go_default_library",
+    actual = ":utilities",
+    visibility = ["//visibility:public"],
+)

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/utilities/doc.go

@@ -0,0 +1,2 @@
+// Package utilities provides members for internal use in grpc-gateway.
+package utilities

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/utilities/pattern.go

@@ -0,0 +1,22 @@
+package utilities
+
+// An OpCode is a opcode of compiled path patterns.
+type OpCode int
+
+// These constants are the valid values of OpCode.
+const (
+	// OpNop does nothing
+	OpNop = OpCode(iota)
+	// OpPush pushes a component to stack
+	OpPush
+	// OpLitPush pushes a component to stack if it matches to the literal
+	OpLitPush
+	// OpPushM concatenates the remaining components and pushes it to stack
+	OpPushM
+	// OpConcatN pops N items from stack, concatenates them and pushes it back to stack
+	OpConcatN
+	// OpCapture pops an item and binds it to the variable
+	OpCapture
+	// OpEnd is the least positive invalid opcode.
+	OpEnd
+)

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/utilities/readerfactory.go

@@ -0,0 +1,19 @@
+package utilities
+
+import (
+	"bytes"
+	"io"
+)
+
+// IOReaderFactory takes in an io.Reader and returns a function that will allow you to create a new reader that begins
+// at the start of the stream
+func IOReaderFactory(r io.Reader) (func() io.Reader, error) {
+	b, err := io.ReadAll(r)
+	if err != nil {
+		return nil, err
+	}
+
+	return func() io.Reader {
+		return bytes.NewReader(b)
+	}, nil
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/utilities/string_array_flag.go

@@ -0,0 +1,33 @@
+package utilities
+
+import (
+	"flag"
+	"strings"
+)
+
+// flagInterface is an cut down interface to `flag`
+type flagInterface interface {
+	Var(value flag.Value, name string, usage string)
+}
+
+// StringArrayFlag defines a flag with the specified name and usage string.
+// The return value is the address of a `StringArrayFlags` variable that stores the repeated values of the flag.
+func StringArrayFlag(f flagInterface, name string, usage string) *StringArrayFlags {
+	value := &StringArrayFlags{}
+	f.Var(value, name, usage)
+	return value
+}
+
+// StringArrayFlags is a wrapper of `[]string` to provider an interface for `flag.Var`
+type StringArrayFlags []string
+
+// String returns a string representation of `StringArrayFlags`
+func (i *StringArrayFlags) String() string {
+	return strings.Join(*i, ",")
+}
+
+// Set appends a value to `StringArrayFlags`
+func (i *StringArrayFlags) Set(value string) error {
+	*i = append(*i, value)
+	return nil
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/utilities/trie.go

@@ -0,0 +1,174 @@
+package utilities
+
+import (
+	"sort"
+)
+
+// DoubleArray is a Double Array implementation of trie on sequences of strings.
+type DoubleArray struct {
+	// Encoding keeps an encoding from string to int
+	Encoding map[string]int
+	// Base is the base array of Double Array
+	Base []int
+	// Check is the check array of Double Array
+	Check []int
+}
+
+// NewDoubleArray builds a DoubleArray from a set of sequences of strings.
+func NewDoubleArray(seqs [][]string) *DoubleArray {
+	da := &DoubleArray{Encoding: make(map[string]int)}
+	if len(seqs) == 0 {
+		return da
+	}
+
+	encoded := registerTokens(da, seqs)
+	sort.Sort(byLex(encoded))
+
+	root := node{row: -1, col: -1, left: 0, right: len(encoded)}
+	addSeqs(da, encoded, 0, root)
+
+	for i := len(da.Base); i > 0; i-- {
+		if da.Check[i-1] != 0 {
+			da.Base = da.Base[:i]
+			da.Check = da.Check[:i]
+			break
+		}
+	}
+	return da
+}
+
+func registerTokens(da *DoubleArray, seqs [][]string) [][]int {
+	var result [][]int
+	for _, seq := range seqs {
+		encoded := make([]int, 0, len(seq))
+		for _, token := range seq {
+			if _, ok := da.Encoding[token]; !ok {
+				da.Encoding[token] = len(da.Encoding)
+			}
+			encoded = append(encoded, da.Encoding[token])
+		}
+		result = append(result, encoded)
+	}
+	for i := range result {
+		result[i] = append(result[i], len(da.Encoding))
+	}
+	return result
+}
+
+type node struct {
+	row, col    int
+	left, right int
+}
+
+func (n node) value(seqs [][]int) int {
+	return seqs[n.row][n.col]
+}
+
+func (n node) children(seqs [][]int) []*node {
+	var result []*node
+	lastVal := int(-1)
+	last := new(node)
+	for i := n.left; i < n.right; i++ {
+		if lastVal == seqs[i][n.col+1] {
+			continue
+		}
+		last.right = i
+		last = &node{
+			row:  i,
+			col:  n.col + 1,
+			left: i,
+		}
+		result = append(result, last)
+	}
+	last.right = n.right
+	return result
+}
+
+func addSeqs(da *DoubleArray, seqs [][]int, pos int, n node) {
+	ensureSize(da, pos)
+
+	children := n.children(seqs)
+	var i int
+	for i = 1; ; i++ {
+		ok := func() bool {
+			for _, child := range children {
+				code := child.value(seqs)
+				j := i + code
+				ensureSize(da, j)
+				if da.Check[j] != 0 {
+					return false
+				}
+			}
+			return true
+		}()
+		if ok {
+			break
+		}
+	}
+	da.Base[pos] = i
+	for _, child := range children {
+		code := child.value(seqs)
+		j := i + code
+		da.Check[j] = pos + 1
+	}
+	terminator := len(da.Encoding)
+	for _, child := range children {
+		code := child.value(seqs)
+		if code == terminator {
+			continue
+		}
+		j := i + code
+		addSeqs(da, seqs, j, *child)
+	}
+}
+
+func ensureSize(da *DoubleArray, i int) {
+	for i >= len(da.Base) {
+		da.Base = append(da.Base, make([]int, len(da.Base)+1)...)
+		da.Check = append(da.Check, make([]int, len(da.Check)+1)...)
+	}
+}
+
+type byLex [][]int
+
+func (l byLex) Len() int      { return len(l) }
+func (l byLex) Swap(i, j int) { l[i], l[j] = l[j], l[i] }
+func (l byLex) Less(i, j int) bool {
+	si := l[i]
+	sj := l[j]
+	var k int
+	for k = 0; k < len(si) && k < len(sj); k++ {
+		if si[k] < sj[k] {
+			return true
+		}
+		if si[k] > sj[k] {
+			return false
+		}
+	}
+	return k < len(sj)
+}
+
+// HasCommonPrefix determines if any sequence in the DoubleArray is a prefix of the given sequence.
+func (da *DoubleArray) HasCommonPrefix(seq []string) bool {
+	if len(da.Base) == 0 {
+		return false
+	}
+
+	var i int
+	for _, t := range seq {
+		code, ok := da.Encoding[t]
+		if !ok {
+			break
+		}
+		j := da.Base[i] + code
+		if len(da.Check) <= j || da.Check[j] != i+1 {
+			break
+		}
+		i = j
+	}
+	j := da.Base[i] + len(da.Encoding)
+	if len(da.Check) <= j || da.Check[j] != i+1 {
+		return false
+	}
+	return true
+}

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/client.go

@@ -0,0 +1,61 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+)
+
+// DefaultClient is the default Client and is used by Get, Head, Post and PostForm.
+// Please be careful of intitialization order - for example, if you change
+// the global propagator, the DefaultClient might still be using the old one.
+var DefaultClient = &http.Client{Transport: NewTransport(http.DefaultTransport)}
+
+// Get is a convenient replacement for http.Get that adds a span around the request.
+func Get(ctx context.Context, targetURL string) (resp *http.Response, err error) {
+	req, err := http.NewRequestWithContext(ctx, "GET", targetURL, nil)
+	if err != nil {
+		return nil, err
+	}
+	return DefaultClient.Do(req)
+}
+
+// Head is a convenient replacement for http.Head that adds a span around the request.
+func Head(ctx context.Context, targetURL string) (resp *http.Response, err error) {
+	req, err := http.NewRequestWithContext(ctx, "HEAD", targetURL, nil)
+	if err != nil {
+		return nil, err
+	}
+	return DefaultClient.Do(req)
+}
+
+// Post is a convenient replacement for http.Post that adds a span around the request.
+func Post(ctx context.Context, targetURL, contentType string, body io.Reader) (resp *http.Response, err error) {
+	req, err := http.NewRequestWithContext(ctx, "POST", targetURL, body)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", contentType)
+	return DefaultClient.Do(req)
+}
+
+// PostForm is a convenient replacement for http.PostForm that adds a span around the request.
+func PostForm(ctx context.Context, targetURL string, data url.Values) (resp *http.Response, err error) {
+	return Post(ctx, targetURL, "application/x-www-form-urlencoded", strings.NewReader(data.Encode()))
+}

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/common.go

@@ -0,0 +1,46 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+
+import (
+	"net/http"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// Attribute keys that can be added to a span.
+const (
+	ReadBytesKey  = attribute.Key("http.read_bytes")  // if anything was read from the request body, the total number of bytes read
+	ReadErrorKey  = attribute.Key("http.read_error")  // If an error occurred while reading a request, the string of the error (io.EOF is not recorded)
+	WroteBytesKey = attribute.Key("http.wrote_bytes") // if anything was written to the response writer, the total number of bytes written
+	WriteErrorKey = attribute.Key("http.write_error") // if an error occurred while writing a reply, the string of the error (io.EOF is not recorded)
+)
+
+// Server HTTP metrics.
+const (
+	RequestCount          = "http.server.request_count"           // Incoming request count total
+	RequestContentLength  = "http.server.request_content_length"  // Incoming request bytes total
+	ResponseContentLength = "http.server.response_content_length" // Incoming response bytes total
+	ServerLatency         = "http.server.duration"                // Incoming end to end duration, microseconds
+)
+
+// Filter is a predicate used to determine whether a given http.request should
+// be traced. A Filter must return true if the request should be traced.
+type Filter func(*http.Request) bool
+
+func newTracer(tp trace.TracerProvider) trace.Tracer {
+	return tp.Tracer(instrumentationName, trace.WithInstrumentationVersion(Version()))
+}

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/config.go

@@ -0,0 +1,208 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptrace"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/metric"
+	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/otel/trace"
+)
+
+const (
+	instrumentationName = "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+)
+
+// config represents the configuration options available for the http.Handler
+// and http.Transport types.
+type config struct {
+	ServerName        string
+	Tracer            trace.Tracer
+	Meter             metric.Meter
+	Propagators       propagation.TextMapPropagator
+	SpanStartOptions  []trace.SpanStartOption
+	PublicEndpoint    bool
+	PublicEndpointFn  func(*http.Request) bool
+	ReadEvent         bool
+	WriteEvent        bool
+	Filters           []Filter
+	SpanNameFormatter func(string, *http.Request) string
+	ClientTrace       func(context.Context) *httptrace.ClientTrace
+
+	TracerProvider trace.TracerProvider
+	MeterProvider  metric.MeterProvider
+}
+
+// Option interface used for setting optional config properties.
+type Option interface {
+	apply(*config)
+}
+
+type optionFunc func(*config)
+
+func (o optionFunc) apply(c *config) {
+	o(c)
+}
+
+// newConfig creates a new config struct and applies opts to it.
+func newConfig(opts ...Option) *config {
+	c := &config{
+		Propagators:   otel.GetTextMapPropagator(),
+		MeterProvider: otel.GetMeterProvider(),
+	}
+	for _, opt := range opts {
+		opt.apply(c)
+	}
+
+	// Tracer is only initialized if manually specified. Otherwise, can be passed with the tracing context.
+	if c.TracerProvider != nil {
+		c.Tracer = newTracer(c.TracerProvider)
+	}
+
+	c.Meter = c.MeterProvider.Meter(
+		instrumentationName,
+		metric.WithInstrumentationVersion(Version()),
+	)
+
+	return c
+}
+
+// WithTracerProvider specifies a tracer provider to use for creating a tracer.
+// If none is specified, the global provider is used.
+func WithTracerProvider(provider trace.TracerProvider) Option {
+	return optionFunc(func(cfg *config) {
+		if provider != nil {
+			cfg.TracerProvider = provider
+		}
+	})
+}
+
+// WithMeterProvider specifies a meter provider to use for creating a meter.
+// If none is specified, the global provider is used.
+func WithMeterProvider(provider metric.MeterProvider) Option {
+	return optionFunc(func(cfg *config) {
+		if provider != nil {
+			cfg.MeterProvider = provider
+		}
+	})
+}
+
+// WithPublicEndpoint configures the Handler to link the span with an incoming
+// span context. If this option is not provided, then the association is a child
+// association instead of a link.
+func WithPublicEndpoint() Option {
+	return optionFunc(func(c *config) {
+		c.PublicEndpoint = true
+	})
+}
+
+// WithPublicEndpointFn runs with every request, and allows conditionnally
+// configuring the Handler to link the span with an incoming span context. If
+// this option is not provided or returns false, then the association is a
+// child association instead of a link.
+// Note: WithPublicEndpoint takes precedence over WithPublicEndpointFn.
+func WithPublicEndpointFn(fn func(*http.Request) bool) Option {
+	return optionFunc(func(c *config) {
+		c.PublicEndpointFn = fn
+	})
+}
+
+// WithPropagators configures specific propagators. If this
+// option isn't specified, then the global TextMapPropagator is used.
+func WithPropagators(ps propagation.TextMapPropagator) Option {
+	return optionFunc(func(c *config) {
+		if ps != nil {
+			c.Propagators = ps
+		}
+	})
+}
+
+// WithSpanOptions configures an additional set of
+// trace.SpanOptions, which are applied to each new span.
+func WithSpanOptions(opts ...trace.SpanStartOption) Option {
+	return optionFunc(func(c *config) {
+		c.SpanStartOptions = append(c.SpanStartOptions, opts...)
+	})
+}
+
+// WithFilter adds a filter to the list of filters used by the handler.
+// If any filter indicates to exclude a request then the request will not be
+// traced. All filters must allow a request to be traced for a Span to be created.
+// If no filters are provided then all requests are traced.
+// Filters will be invoked for each processed request, it is advised to make them
+// simple and fast.
+func WithFilter(f Filter) Option {
+	return optionFunc(func(c *config) {
+		c.Filters = append(c.Filters, f)
+	})
+}
+
+type event int
+
+// Different types of events that can be recorded, see WithMessageEvents.
+const (
+	ReadEvents event = iota
+	WriteEvents
+)
+
+// WithMessageEvents configures the Handler to record the specified events
+// (span.AddEvent) on spans. By default only summary attributes are added at the
+// end of the request.
+//
+// Valid events are:
+//   - ReadEvents: Record the number of bytes read after every http.Request.Body.Read
+//     using the ReadBytesKey
+//   - WriteEvents: Record the number of bytes written after every http.ResponeWriter.Write
+//     using the WriteBytesKey
+func WithMessageEvents(events ...event) Option {
+	return optionFunc(func(c *config) {
+		for _, e := range events {
+			switch e {
+			case ReadEvents:
+				c.ReadEvent = true
+			case WriteEvents:
+				c.WriteEvent = true
+			}
+		}
+	})
+}
+
+// WithSpanNameFormatter takes a function that will be called on every
+// request and the returned string will become the Span Name.
+func WithSpanNameFormatter(f func(operation string, r *http.Request) string) Option {
+	return optionFunc(func(c *config) {
+		c.SpanNameFormatter = f
+	})
+}
+
+// WithClientTrace takes a function that returns client trace instance that will be
+// applied to the requests sent through the otelhttp Transport.
+func WithClientTrace(f func(context.Context) *httptrace.ClientTrace) Option {
+	return optionFunc(func(c *config) {
+		c.ClientTrace = f
+	})
+}
+
+// WithServerName returns an Option that sets the name of the (virtual) server
+// handling requests.
+func WithServerName(server string) Option {
+	return optionFunc(func(c *config) {
+		c.ServerName = server
+	})
+}

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/doc.go

@@ -0,0 +1,18 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package otelhttp provides an http.Handler and functions that are intended
+// to be used to add tracing by wrapping existing handlers (with Handler) and
+// routes WithRouteTag.
+package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/handler.go

@@ -0,0 +1,275 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+
+import (
+	"io"
+	"net/http"
+	"time"
+
+	"github.com/felixge/httpsnoop"
+
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil"
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/metric"
+	"go.opentelemetry.io/otel/propagation"
+	semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// middleware is an http middleware which wraps the next handler in a span.
+type middleware struct {
+	operation string
+	server    string
+
+	tracer            trace.Tracer
+	meter             metric.Meter
+	propagators       propagation.TextMapPropagator
+	spanStartOptions  []trace.SpanStartOption
+	readEvent         bool
+	writeEvent        bool
+	filters           []Filter
+	spanNameFormatter func(string, *http.Request) string
+	counters          map[string]metric.Int64Counter
+	valueRecorders    map[string]metric.Float64Histogram
+	publicEndpoint    bool
+	publicEndpointFn  func(*http.Request) bool
+}
+
+func defaultHandlerFormatter(operation string, _ *http.Request) string {
+	return operation
+}
+
+// NewHandler wraps the passed handler in a span named after the operation and
+// enriches it with metrics.
+func NewHandler(handler http.Handler, operation string, opts ...Option) http.Handler {
+	return NewMiddleware(operation, opts...)(handler)
+}
+
+// NewMiddleware returns a tracing and metrics instrumentation middleware.
+// The handler returned by the middleware wraps a handler
+// in a span named after the operation and enriches it with metrics.
+func NewMiddleware(operation string, opts ...Option) func(http.Handler) http.Handler {
+	h := middleware{
+		operation: operation,
+	}
+
+	defaultOpts := []Option{
+		WithSpanOptions(trace.WithSpanKind(trace.SpanKindServer)),
+		WithSpanNameFormatter(defaultHandlerFormatter),
+	}
+
+	c := newConfig(append(defaultOpts, opts...)...)
+	h.configure(c)
+	h.createMeasures()
+
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			h.serveHTTP(w, r, next)
+		})
+	}
+}
+
+func (h *middleware) configure(c *config) {
+	h.tracer = c.Tracer
+	h.meter = c.Meter
+	h.propagators = c.Propagators
+	h.spanStartOptions = c.SpanStartOptions
+	h.readEvent = c.ReadEvent
+	h.writeEvent = c.WriteEvent
+	h.filters = c.Filters
+	h.spanNameFormatter = c.SpanNameFormatter
+	h.publicEndpoint = c.PublicEndpoint
+	h.publicEndpointFn = c.PublicEndpointFn
+	h.server = c.ServerName
+}
+
+func handleErr(err error) {
+	if err != nil {
+		otel.Handle(err)
+	}
+}
+
+func (h *middleware) createMeasures() {
+	h.counters = make(map[string]metric.Int64Counter)
+	h.valueRecorders = make(map[string]metric.Float64Histogram)
+
+	requestBytesCounter, err := h.meter.Int64Counter(RequestContentLength)
+	handleErr(err)
+
+	responseBytesCounter, err := h.meter.Int64Counter(ResponseContentLength)
+	handleErr(err)
+
+	serverLatencyMeasure, err := h.meter.Float64Histogram(ServerLatency)
+	handleErr(err)
+
+	h.counters[RequestContentLength] = requestBytesCounter
+	h.counters[ResponseContentLength] = responseBytesCounter
+	h.valueRecorders[ServerLatency] = serverLatencyMeasure
+}
+
+// serveHTTP sets up tracing and calls the given next http.Handler with the span
+// context injected into the request context.
+func (h *middleware) serveHTTP(w http.ResponseWriter, r *http.Request, next http.Handler) {
+	requestStartTime := time.Now()
+	for _, f := range h.filters {
+		if !f(r) {
+			// Simply pass through to the handler if a filter rejects the request
+			next.ServeHTTP(w, r)
+			return
+		}
+	}
+
+	ctx := h.propagators.Extract(r.Context(), propagation.HeaderCarrier(r.Header))
+	opts := []trace.SpanStartOption{
+		trace.WithAttributes(semconvutil.HTTPServerRequest(h.server, r)...),
+	}
+	if h.server != "" {
+		hostAttr := semconv.NetHostName(h.server)
+		opts = append(opts, trace.WithAttributes(hostAttr))
+	}
+	opts = append(opts, h.spanStartOptions...)
+	if h.publicEndpoint || (h.publicEndpointFn != nil && h.publicEndpointFn(r.WithContext(ctx))) {
+		opts = append(opts, trace.WithNewRoot())
+		// Linking incoming span context if any for public endpoint.
+		if s := trace.SpanContextFromContext(ctx); s.IsValid() && s.IsRemote() {
+			opts = append(opts, trace.WithLinks(trace.Link{SpanContext: s}))
+		}
+	}
+
+	tracer := h.tracer
+
+	if tracer == nil {
+		if span := trace.SpanFromContext(r.Context()); span.SpanContext().IsValid() {
+			tracer = newTracer(span.TracerProvider())
+		} else {
+			tracer = newTracer(otel.GetTracerProvider())
+		}
+	}
+
+	ctx, span := tracer.Start(ctx, h.spanNameFormatter(h.operation, r), opts...)
+	defer span.End()
+
+	readRecordFunc := func(int64) {}
+	if h.readEvent {
+		readRecordFunc = func(n int64) {
+			span.AddEvent("read", trace.WithAttributes(ReadBytesKey.Int64(n)))
+		}
+	}
+
+	var bw bodyWrapper
+	// if request body is nil or NoBody, we don't want to mutate the body as it
+	// will affect the identity of it in an unforeseeable way because we assert
+	// ReadCloser fulfills a certain interface and it is indeed nil or NoBody.
+	if r.Body != nil && r.Body != http.NoBody {
+		bw.ReadCloser = r.Body
+		bw.record = readRecordFunc
+		r.Body = &bw
+	}
+
+	writeRecordFunc := func(int64) {}
+	if h.writeEvent {
+		writeRecordFunc = func(n int64) {
+			span.AddEvent("write", trace.WithAttributes(WroteBytesKey.Int64(n)))
+		}
+	}
+
+	rww := &respWriterWrapper{
+		ResponseWriter: w,
+		record:         writeRecordFunc,
+		ctx:            ctx,
+		props:          h.propagators,
+		statusCode:     http.StatusOK, // default status code in case the Handler doesn't write anything
+	}
+
+	// Wrap w to use our ResponseWriter methods while also exposing
+	// other interfaces that w may implement (http.CloseNotifier,
+	// http.Flusher, http.Hijacker, http.Pusher, io.ReaderFrom).
+
+	w = httpsnoop.Wrap(w, httpsnoop.Hooks{
+		Header: func(httpsnoop.HeaderFunc) httpsnoop.HeaderFunc {
+			return rww.Header
+		},
+		Write: func(httpsnoop.WriteFunc) httpsnoop.WriteFunc {
+			return rww.Write
+		},
+		WriteHeader: func(httpsnoop.WriteHeaderFunc) httpsnoop.WriteHeaderFunc {
+			return rww.WriteHeader
+		},
+	})
+
+	labeler := &Labeler{}
+	ctx = injectLabeler(ctx, labeler)
+
+	next.ServeHTTP(w, r.WithContext(ctx))
+
+	setAfterServeAttributes(span, bw.read, rww.written, rww.statusCode, bw.err, rww.err)
+
+	// Add metrics
+	attributes := append(labeler.Get(), semconvutil.HTTPServerRequestMetrics(h.server, r)...)
+	if rww.statusCode > 0 {
+		attributes = append(attributes, semconv.HTTPStatusCode(rww.statusCode))
+	}
+	o := metric.WithAttributes(attributes...)
+	h.counters[RequestContentLength].Add(ctx, bw.read, o)
+	h.counters[ResponseContentLength].Add(ctx, rww.written, o)
+
+	// Use floating point division here for higher precision (instead of Millisecond method).
+	elapsedTime := float64(time.Since(requestStartTime)) / float64(time.Millisecond)
+
+	h.valueRecorders[ServerLatency].Record(ctx, elapsedTime, o)
+}
+
+func setAfterServeAttributes(span trace.Span, read, wrote int64, statusCode int, rerr, werr error) {
+	attributes := []attribute.KeyValue{}
+
+	// TODO: Consider adding an event after each read and write, possibly as an
+	// option (defaulting to off), so as to not create needlessly verbose spans.
+	if read > 0 {
+		attributes = append(attributes, ReadBytesKey.Int64(read))
+	}
+	if rerr != nil && rerr != io.EOF {
+		attributes = append(attributes, ReadErrorKey.String(rerr.Error()))
+	}
+	if wrote > 0 {
+		attributes = append(attributes, WroteBytesKey.Int64(wrote))
+	}
+	if statusCode > 0 {
+		attributes = append(attributes, semconv.HTTPStatusCode(statusCode))
+	}
+	span.SetStatus(semconvutil.HTTPServerStatus(statusCode))
+
+	if werr != nil && werr != io.EOF {
+		attributes = append(attributes, WriteErrorKey.String(werr.Error()))
+	}
+	span.SetAttributes(attributes...)
+}
+
+// WithRouteTag annotates spans and metrics with the provided route name
+// with HTTP route attribute.
+func WithRouteTag(route string, h http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		attr := semconv.HTTPRouteKey.String(route)
+
+		span := trace.SpanFromContext(r.Context())
+		span.SetAttributes(attr)
+
+		labeler, _ := LabelerFromContext(r.Context())
+		labeler.Add(attr)
+
+		h.ServeHTTP(w, r)
+	})
+}

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/gen.go

@@ -0,0 +1,21 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package semconvutil // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil"
+
+// Generate semconvutil package:
+//go:generate gotmpl --body=../../../../../../internal/shared/semconvutil/httpconv_test.go.tmpl "--data={}" --out=httpconv_test.go
+//go:generate gotmpl --body=../../../../../../internal/shared/semconvutil/httpconv.go.tmpl "--data={}" --out=httpconv.go
+//go:generate gotmpl --body=../../../../../../internal/shared/semconvutil/netconv_test.go.tmpl "--data={}" --out=netconv_test.go
+//go:generate gotmpl --body=../../../../../../internal/shared/semconvutil/netconv.go.tmpl "--data={}" --out=netconv.go

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/httpconv.go

@@ -0,0 +1,552 @@
+// Code created by gotmpl. DO NOT MODIFY.
+// source: internal/shared/semconvutil/httpconv.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package semconvutil // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil"
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+	semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
+)
+
+// HTTPClientResponse returns trace attributes for an HTTP response received by a
+// client from a server. It will return the following attributes if the related
+// values are defined in resp: "http.status.code",
+// "http.response_content_length".
+//
+// This does not add all OpenTelemetry required attributes for an HTTP event,
+// it assumes ClientRequest was used to create the span with a complete set of
+// attributes. If a complete set of attributes can be generated using the
+// request contained in resp. For example:
+//
+//	append(HTTPClientResponse(resp), ClientRequest(resp.Request)...)
+func HTTPClientResponse(resp *http.Response) []attribute.KeyValue {
+	return hc.ClientResponse(resp)
+}
+
+// HTTPClientRequest returns trace attributes for an HTTP request made by a client.
+// The following attributes are always returned: "http.url", "http.flavor",
+// "http.method", "net.peer.name". The following attributes are returned if the
+// related values are defined in req: "net.peer.port", "http.user_agent",
+// "http.request_content_length", "enduser.id".
+func HTTPClientRequest(req *http.Request) []attribute.KeyValue {
+	return hc.ClientRequest(req)
+}
+
+// HTTPClientStatus returns a span status code and message for an HTTP status code
+// value received by a client.
+func HTTPClientStatus(code int) (codes.Code, string) {
+	return hc.ClientStatus(code)
+}
+
+// HTTPServerRequest returns trace attributes for an HTTP request received by a
+// server.
+//
+// The server must be the primary server name if it is known. For example this
+// would be the ServerName directive
+// (https://httpd.apache.org/docs/2.4/mod/core.html#servername) for an Apache
+// server, and the server_name directive
+// (http://nginx.org/en/docs/http/ngx_http_core_module.html#server_name) for an
+// nginx server. More generically, the primary server name would be the host
+// header value that matches the default virtual host of an HTTP server. It
+// should include the host identifier and if a port is used to route to the
+// server that port identifier should be included as an appropriate port
+// suffix.
+//
+// If the primary server name is not known, server should be an empty string.
+// The req Host will be used to determine the server instead.
+//
+// The following attributes are always returned: "http.method", "http.scheme",
+// "http.flavor", "http.target", "net.host.name". The following attributes are
+// returned if they related values are defined in req: "net.host.port",
+// "net.sock.peer.addr", "net.sock.peer.port", "http.user_agent", "enduser.id",
+// "http.client_ip".
+func HTTPServerRequest(server string, req *http.Request) []attribute.KeyValue {
+	return hc.ServerRequest(server, req)
+}
+
+// HTTPServerRequestMetrics returns metric attributes for an HTTP request received by a
+// server.
+//
+// The server must be the primary server name if it is known. For example this
+// would be the ServerName directive
+// (https://httpd.apache.org/docs/2.4/mod/core.html#servername) for an Apache
+// server, and the server_name directive
+// (http://nginx.org/en/docs/http/ngx_http_core_module.html#server_name) for an
+// nginx server. More generically, the primary server name would be the host
+// header value that matches the default virtual host of an HTTP server. It
+// should include the host identifier and if a port is used to route to the
+// server that port identifier should be included as an appropriate port
+// suffix.
+//
+// If the primary server name is not known, server should be an empty string.
+// The req Host will be used to determine the server instead.
+//
+// The following attributes are always returned: "http.method", "http.scheme",
+// "http.flavor", "net.host.name". The following attributes are
+// returned if they related values are defined in req: "net.host.port".
+func HTTPServerRequestMetrics(server string, req *http.Request) []attribute.KeyValue {
+	return hc.ServerRequestMetrics(server, req)
+}
+
+// HTTPServerStatus returns a span status code and message for an HTTP status code
+// value returned by a server. Status codes in the 400-499 range are not
+// returned as errors.
+func HTTPServerStatus(code int) (codes.Code, string) {
+	return hc.ServerStatus(code)
+}
+
+// HTTPRequestHeader returns the contents of h as attributes.
+//
+// Instrumentation should require an explicit configuration of which headers to
+// captured and then prune what they pass here. Including all headers can be a
+// security risk - explicit configuration helps avoid leaking sensitive
+// information.
+//
+// The User-Agent header is already captured in the http.user_agent attribute
+// from ClientRequest and ServerRequest. Instrumentation may provide an option
+// to capture that header here even though it is not recommended. Otherwise,
+// instrumentation should filter that out of what is passed.
+func HTTPRequestHeader(h http.Header) []attribute.KeyValue {
+	return hc.RequestHeader(h)
+}
+
+// HTTPResponseHeader returns the contents of h as attributes.
+//
+// Instrumentation should require an explicit configuration of which headers to
+// captured and then prune what they pass here. Including all headers can be a
+// security risk - explicit configuration helps avoid leaking sensitive
+// information.
+//
+// The User-Agent header is already captured in the http.user_agent attribute
+// from ClientRequest and ServerRequest. Instrumentation may provide an option
+// to capture that header here even though it is not recommended. Otherwise,
+// instrumentation should filter that out of what is passed.
+func HTTPResponseHeader(h http.Header) []attribute.KeyValue {
+	return hc.ResponseHeader(h)
+}
+
+// httpConv are the HTTP semantic convention attributes defined for a version
+// of the OpenTelemetry specification.
+type httpConv struct {
+	NetConv *netConv
+
+	EnduserIDKey                 attribute.Key
+	HTTPClientIPKey              attribute.Key
+	HTTPFlavorKey                attribute.Key
+	HTTPMethodKey                attribute.Key
+	HTTPRequestContentLengthKey  attribute.Key
+	HTTPResponseContentLengthKey attribute.Key
+	HTTPRouteKey                 attribute.Key
+	HTTPSchemeHTTP               attribute.KeyValue
+	HTTPSchemeHTTPS              attribute.KeyValue
+	HTTPStatusCodeKey            attribute.Key
+	HTTPTargetKey                attribute.Key
+	HTTPURLKey                   attribute.Key
+	HTTPUserAgentKey             attribute.Key
+}
+
+var hc = &httpConv{
+	NetConv: nc,
+
+	EnduserIDKey:                 semconv.EnduserIDKey,
+	HTTPClientIPKey:              semconv.HTTPClientIPKey,
+	HTTPFlavorKey:                semconv.HTTPFlavorKey,
+	HTTPMethodKey:                semconv.HTTPMethodKey,
+	HTTPRequestContentLengthKey:  semconv.HTTPRequestContentLengthKey,
+	HTTPResponseContentLengthKey: semconv.HTTPResponseContentLengthKey,
+	HTTPRouteKey:                 semconv.HTTPRouteKey,
+	HTTPSchemeHTTP:               semconv.HTTPSchemeHTTP,
+	HTTPSchemeHTTPS:              semconv.HTTPSchemeHTTPS,
+	HTTPStatusCodeKey:            semconv.HTTPStatusCodeKey,
+	HTTPTargetKey:                semconv.HTTPTargetKey,
+	HTTPURLKey:                   semconv.HTTPURLKey,
+	HTTPUserAgentKey:             semconv.HTTPUserAgentKey,
+}
+
+// ClientResponse returns attributes for an HTTP response received by a client
+// from a server. The following attributes are returned if the related values
+// are defined in resp: "http.status.code", "http.response_content_length".
+//
+// This does not add all OpenTelemetry required attributes for an HTTP event,
+// it assumes ClientRequest was used to create the span with a complete set of
+// attributes. If a complete set of attributes can be generated using the
+// request contained in resp. For example:
+//
+//	append(ClientResponse(resp), ClientRequest(resp.Request)...)
+func (c *httpConv) ClientResponse(resp *http.Response) []attribute.KeyValue {
+	var n int
+	if resp.StatusCode > 0 {
+		n++
+	}
+	if resp.ContentLength > 0 {
+		n++
+	}
+
+	attrs := make([]attribute.KeyValue, 0, n)
+	if resp.StatusCode > 0 {
+		attrs = append(attrs, c.HTTPStatusCodeKey.Int(resp.StatusCode))
+	}
+	if resp.ContentLength > 0 {
+		attrs = append(attrs, c.HTTPResponseContentLengthKey.Int(int(resp.ContentLength)))
+	}
+	return attrs
+}
+
+// ClientRequest returns attributes for an HTTP request made by a client. The
+// following attributes are always returned: "http.url", "http.flavor",
+// "http.method", "net.peer.name". The following attributes are returned if the
+// related values are defined in req: "net.peer.port", "http.user_agent",
+// "http.request_content_length", "enduser.id".
+func (c *httpConv) ClientRequest(req *http.Request) []attribute.KeyValue {
+	n := 3 // URL, peer name, proto, and method.
+	var h string
+	if req.URL != nil {
+		h = req.URL.Host
+	}
+	peer, p := firstHostPort(h, req.Header.Get("Host"))
+	port := requiredHTTPPort(req.URL != nil && req.URL.Scheme == "https", p)
+	if port > 0 {
+		n++
+	}
+	useragent := req.UserAgent()
+	if useragent != "" {
+		n++
+	}
+	if req.ContentLength > 0 {
+		n++
+	}
+	userID, _, hasUserID := req.BasicAuth()
+	if hasUserID {
+		n++
+	}
+	attrs := make([]attribute.KeyValue, 0, n)
+
+	attrs = append(attrs, c.method(req.Method))
+	attrs = append(attrs, c.flavor(req.Proto))
+
+	var u string
+	if req.URL != nil {
+		// Remove any username/password info that may be in the URL.
+		userinfo := req.URL.User
+		req.URL.User = nil
+		u = req.URL.String()
+		// Restore any username/password info that was removed.
+		req.URL.User = userinfo
+	}
+	attrs = append(attrs, c.HTTPURLKey.String(u))
+
+	attrs = append(attrs, c.NetConv.PeerName(peer))
+	if port > 0 {
+		attrs = append(attrs, c.NetConv.PeerPort(port))
+	}
+
+	if useragent != "" {
+		attrs = append(attrs, c.HTTPUserAgentKey.String(useragent))
+	}
+
+	if l := req.ContentLength; l > 0 {
+		attrs = append(attrs, c.HTTPRequestContentLengthKey.Int64(l))
+	}
+
+	if hasUserID {
+		attrs = append(attrs, c.EnduserIDKey.String(userID))
+	}
+
+	return attrs
+}
+
+// ServerRequest returns attributes for an HTTP request received by a server.
+//
+// The server must be the primary server name if it is known. For example this
+// would be the ServerName directive
+// (https://httpd.apache.org/docs/2.4/mod/core.html#servername) for an Apache
+// server, and the server_name directive
+// (http://nginx.org/en/docs/http/ngx_http_core_module.html#server_name) for an
+// nginx server. More generically, the primary server name would be the host
+// header value that matches the default virtual host of an HTTP server. It
+// should include the host identifier and if a port is used to route to the
+// server that port identifier should be included as an appropriate port
+// suffix.
+//
+// If the primary server name is not known, server should be an empty string.
+// The req Host will be used to determine the server instead.
+//
+// The following attributes are always returned: "http.method", "http.scheme",
+// "http.flavor", "http.target", "net.host.name". The following attributes are
+// returned if they related values are defined in req: "net.host.port",
+// "net.sock.peer.addr", "net.sock.peer.port", "http.user_agent", "enduser.id",
+// "http.client_ip".
+func (c *httpConv) ServerRequest(server string, req *http.Request) []attribute.KeyValue {
+	// TODO: This currently does not add the specification required
+	// `http.target` attribute. It has too high of a cardinality to safely be
+	// added. An alternate should be added, or this comment removed, when it is
+	// addressed by the specification. If it is ultimately decided to continue
+	// not including the attribute, the HTTPTargetKey field of the httpConv
+	// should be removed as well.
+
+	n := 4 // Method, scheme, proto, and host name.
+	var host string
+	var p int
+	if server == "" {
+		host, p = splitHostPort(req.Host)
+	} else {
+		// Prioritize the primary server name.
+		host, p = splitHostPort(server)
+		if p < 0 {
+			_, p = splitHostPort(req.Host)
+		}
+	}
+	hostPort := requiredHTTPPort(req.TLS != nil, p)
+	if hostPort > 0 {
+		n++
+	}
+	peer, peerPort := splitHostPort(req.RemoteAddr)
+	if peer != "" {
+		n++
+		if peerPort > 0 {
+			n++
+		}
+	}
+	useragent := req.UserAgent()
+	if useragent != "" {
+		n++
+	}
+	userID, _, hasUserID := req.BasicAuth()
+	if hasUserID {
+		n++
+	}
+	clientIP := serverClientIP(req.Header.Get("X-Forwarded-For"))
+	if clientIP != "" {
+		n++
+	}
+	attrs := make([]attribute.KeyValue, 0, n)
+
+	attrs = append(attrs, c.method(req.Method))
+	attrs = append(attrs, c.scheme(req.TLS != nil))
+	attrs = append(attrs, c.flavor(req.Proto))
+	attrs = append(attrs, c.NetConv.HostName(host))
+
+	if hostPort > 0 {
+		attrs = append(attrs, c.NetConv.HostPort(hostPort))
+	}
+
+	if peer != "" {
+		// The Go HTTP server sets RemoteAddr to "IP:port", this will not be a
+		// file-path that would be interpreted with a sock family.
+		attrs = append(attrs, c.NetConv.SockPeerAddr(peer))
+		if peerPort > 0 {
+			attrs = append(attrs, c.NetConv.SockPeerPort(peerPort))
+		}
+	}
+
+	if useragent != "" {
+		attrs = append(attrs, c.HTTPUserAgentKey.String(useragent))
+	}
+
+	if hasUserID {
+		attrs = append(attrs, c.EnduserIDKey.String(userID))
+	}
+
+	if clientIP != "" {
+		attrs = append(attrs, c.HTTPClientIPKey.String(clientIP))
+	}
+
+	return attrs
+}
+
+// ServerRequestMetrics returns metric attributes for an HTTP request received
+// by a server.
+//
+// The server must be the primary server name if it is known. For example this
+// would be the ServerName directive
+// (https://httpd.apache.org/docs/2.4/mod/core.html#servername) for an Apache
+// server, and the server_name directive
+// (http://nginx.org/en/docs/http/ngx_http_core_module.html#server_name) for an
+// nginx server. More generically, the primary server name would be the host
+// header value that matches the default virtual host of an HTTP server. It
+// should include the host identifier and if a port is used to route to the
+// server that port identifier should be included as an appropriate port
+// suffix.
+//
+// If the primary server name is not known, server should be an empty string.
+// The req Host will be used to determine the server instead.
+//
+// The following attributes are always returned: "http.method", "http.scheme",
+// "http.flavor", "net.host.name". The following attributes are
+// returned if they related values are defined in req: "net.host.port".
+func (c *httpConv) ServerRequestMetrics(server string, req *http.Request) []attribute.KeyValue {
+	// TODO: This currently does not add the specification required
+	// `http.target` attribute. It has too high of a cardinality to safely be
+	// added. An alternate should be added, or this comment removed, when it is
+	// addressed by the specification. If it is ultimately decided to continue
+	// not including the attribute, the HTTPTargetKey field of the httpConv
+	// should be removed as well.
+
+	n := 4 // Method, scheme, proto, and host name.
+	var host string
+	var p int
+	if server == "" {
+		host, p = splitHostPort(req.Host)
+	} else {
+		// Prioritize the primary server name.
+		host, p = splitHostPort(server)
+		if p < 0 {
+			_, p = splitHostPort(req.Host)
+		}
+	}
+	hostPort := requiredHTTPPort(req.TLS != nil, p)
+	if hostPort > 0 {
+		n++
+	}
+	attrs := make([]attribute.KeyValue, 0, n)
+
+	attrs = append(attrs, c.methodMetric(req.Method))
+	attrs = append(attrs, c.scheme(req.TLS != nil))
+	attrs = append(attrs, c.flavor(req.Proto))
+	attrs = append(attrs, c.NetConv.HostName(host))
+
+	if hostPort > 0 {
+		attrs = append(attrs, c.NetConv.HostPort(hostPort))
+	}
+
+	return attrs
+}
+
+func (c *httpConv) method(method string) attribute.KeyValue {
+	if method == "" {
+		return c.HTTPMethodKey.String(http.MethodGet)
+	}
+	return c.HTTPMethodKey.String(method)
+}
+
+func (c *httpConv) methodMetric(method string) attribute.KeyValue {
+	method = strings.ToUpper(method)
+	switch method {
+	case http.MethodConnect, http.MethodDelete, http.MethodGet, http.MethodHead, http.MethodOptions, http.MethodPatch, http.MethodPost, http.MethodPut, http.MethodTrace:
+	default:
+		method = "_OTHER"
+	}
+	return c.HTTPMethodKey.String(method)
+}
+
+func (c *httpConv) scheme(https bool) attribute.KeyValue { // nolint:revive
+	if https {
+		return c.HTTPSchemeHTTPS
+	}
+	return c.HTTPSchemeHTTP
+}
+
+func (c *httpConv) flavor(proto string) attribute.KeyValue {
+	switch proto {
+	case "HTTP/1.0":
+		return c.HTTPFlavorKey.String("1.0")
+	case "HTTP/1.1":
+		return c.HTTPFlavorKey.String("1.1")
+	case "HTTP/2":
+		return c.HTTPFlavorKey.String("2.0")
+	case "HTTP/3":
+		return c.HTTPFlavorKey.String("3.0")
+	default:
+		return c.HTTPFlavorKey.String(proto)
+	}
+}
+
+func serverClientIP(xForwardedFor string) string {
+	if idx := strings.Index(xForwardedFor, ","); idx >= 0 {
+		xForwardedFor = xForwardedFor[:idx]
+	}
+	return xForwardedFor
+}
+
+func requiredHTTPPort(https bool, port int) int { // nolint:revive
+	if https {
+		if port > 0 && port != 443 {
+			return port
+		}
+	} else {
+		if port > 0 && port != 80 {
+			return port
+		}
+	}
+	return -1
+}
+
+// Return the request host and port from the first non-empty source.
+func firstHostPort(source ...string) (host string, port int) {
+	for _, hostport := range source {
+		host, port = splitHostPort(hostport)
+		if host != "" || port > 0 {
+			break
+		}
+	}
+	return
+}
+
+// RequestHeader returns the contents of h as OpenTelemetry attributes.
+func (c *httpConv) RequestHeader(h http.Header) []attribute.KeyValue {
+	return c.header("http.request.header", h)
+}
+
+// ResponseHeader returns the contents of h as OpenTelemetry attributes.
+func (c *httpConv) ResponseHeader(h http.Header) []attribute.KeyValue {
+	return c.header("http.response.header", h)
+}
+
+func (c *httpConv) header(prefix string, h http.Header) []attribute.KeyValue {
+	key := func(k string) attribute.Key {
+		k = strings.ToLower(k)
+		k = strings.ReplaceAll(k, "-", "_")
+		k = fmt.Sprintf("%s.%s", prefix, k)
+		return attribute.Key(k)
+	}
+
+	attrs := make([]attribute.KeyValue, 0, len(h))
+	for k, v := range h {
+		attrs = append(attrs, key(k).StringSlice(v))
+	}
+	return attrs
+}
+
+// ClientStatus returns a span status code and message for an HTTP status code
+// value received by a client.
+func (c *httpConv) ClientStatus(code int) (codes.Code, string) {
+	if code < 100 || code >= 600 {
+		return codes.Error, fmt.Sprintf("Invalid HTTP status code %d", code)
+	}
+	if code >= 400 {
+		return codes.Error, ""
+	}
+	return codes.Unset, ""
+}
+
+// ServerStatus returns a span status code and message for an HTTP status code
+// value returned by a server. Status codes in the 400-499 range are not
+// returned as errors.
+func (c *httpConv) ServerStatus(code int) (codes.Code, string) {
+	if code < 100 || code >= 600 {
+		return codes.Error, fmt.Sprintf("Invalid HTTP status code %d", code)
+	}
+	if code >= 500 {
+		return codes.Error, ""
+	}
+	return codes.Unset, ""
+}

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/netconv.go

@@ -0,0 +1,368 @@
+// Code created by gotmpl. DO NOT MODIFY.
+// source: internal/shared/semconvutil/netconv.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package semconvutil // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil"
+
+import (
+	"net"
+	"strconv"
+	"strings"
+
+	"go.opentelemetry.io/otel/attribute"
+	semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
+)
+
+// NetTransport returns a trace attribute describing the transport protocol of the
+// passed network. See the net.Dial for information about acceptable network
+// values.
+func NetTransport(network string) attribute.KeyValue {
+	return nc.Transport(network)
+}
+
+// NetClient returns trace attributes for a client network connection to address.
+// See net.Dial for information about acceptable address values, address should
+// be the same as the one used to create conn. If conn is nil, only network
+// peer attributes will be returned that describe address. Otherwise, the
+// socket level information about conn will also be included.
+func NetClient(address string, conn net.Conn) []attribute.KeyValue {
+	return nc.Client(address, conn)
+}
+
+// NetServer returns trace attributes for a network listener listening at address.
+// See net.Listen for information about acceptable address values, address
+// should be the same as the one used to create ln. If ln is nil, only network
+// host attributes will be returned that describe address. Otherwise, the
+// socket level information about ln will also be included.
+func NetServer(address string, ln net.Listener) []attribute.KeyValue {
+	return nc.Server(address, ln)
+}
+
+// netConv are the network semantic convention attributes defined for a version
+// of the OpenTelemetry specification.
+type netConv struct {
+	NetHostNameKey     attribute.Key
+	NetHostPortKey     attribute.Key
+	NetPeerNameKey     attribute.Key
+	NetPeerPortKey     attribute.Key
+	NetSockFamilyKey   attribute.Key
+	NetSockPeerAddrKey attribute.Key
+	NetSockPeerPortKey attribute.Key
+	NetSockHostAddrKey attribute.Key
+	NetSockHostPortKey attribute.Key
+	NetTransportOther  attribute.KeyValue
+	NetTransportTCP    attribute.KeyValue
+	NetTransportUDP    attribute.KeyValue
+	NetTransportInProc attribute.KeyValue
+}
+
+var nc = &netConv{
+	NetHostNameKey:     semconv.NetHostNameKey,
+	NetHostPortKey:     semconv.NetHostPortKey,
+	NetPeerNameKey:     semconv.NetPeerNameKey,
+	NetPeerPortKey:     semconv.NetPeerPortKey,
+	NetSockFamilyKey:   semconv.NetSockFamilyKey,
+	NetSockPeerAddrKey: semconv.NetSockPeerAddrKey,
+	NetSockPeerPortKey: semconv.NetSockPeerPortKey,
+	NetSockHostAddrKey: semconv.NetSockHostAddrKey,
+	NetSockHostPortKey: semconv.NetSockHostPortKey,
+	NetTransportOther:  semconv.NetTransportOther,
+	NetTransportTCP:    semconv.NetTransportTCP,
+	NetTransportUDP:    semconv.NetTransportUDP,
+	NetTransportInProc: semconv.NetTransportInProc,
+}
+
+func (c *netConv) Transport(network string) attribute.KeyValue {
+	switch network {
+	case "tcp", "tcp4", "tcp6":
+		return c.NetTransportTCP
+	case "udp", "udp4", "udp6":
+		return c.NetTransportUDP
+	case "unix", "unixgram", "unixpacket":
+		return c.NetTransportInProc
+	default:
+		// "ip:*", "ip4:*", and "ip6:*" all are considered other.
+		return c.NetTransportOther
+	}
+}
+
+// Host returns attributes for a network host address.
+func (c *netConv) Host(address string) []attribute.KeyValue {
+	h, p := splitHostPort(address)
+	var n int
+	if h != "" {
+		n++
+		if p > 0 {
+			n++
+		}
+	}
+
+	if n == 0 {
+		return nil
+	}
+
+	attrs := make([]attribute.KeyValue, 0, n)
+	attrs = append(attrs, c.HostName(h))
+	if p > 0 {
+		attrs = append(attrs, c.HostPort(int(p)))
+	}
+	return attrs
+}
+
+// Server returns attributes for a network listener listening at address. See
+// net.Listen for information about acceptable address values, address should
+// be the same as the one used to create ln. If ln is nil, only network host
+// attributes will be returned that describe address. Otherwise, the socket
+// level information about ln will also be included.
+func (c *netConv) Server(address string, ln net.Listener) []attribute.KeyValue {
+	if ln == nil {
+		return c.Host(address)
+	}
+
+	lAddr := ln.Addr()
+	if lAddr == nil {
+		return c.Host(address)
+	}
+
+	hostName, hostPort := splitHostPort(address)
+	sockHostAddr, sockHostPort := splitHostPort(lAddr.String())
+	network := lAddr.Network()
+	sockFamily := family(network, sockHostAddr)
+
+	n := nonZeroStr(hostName, network, sockHostAddr, sockFamily)
+	n += positiveInt(hostPort, sockHostPort)
+	attr := make([]attribute.KeyValue, 0, n)
+	if hostName != "" {
+		attr = append(attr, c.HostName(hostName))
+		if hostPort > 0 {
+			// Only if net.host.name is set should net.host.port be.
+			attr = append(attr, c.HostPort(hostPort))
+		}
+	}
+	if network != "" {
+		attr = append(attr, c.Transport(network))
+	}
+	if sockFamily != "" {
+		attr = append(attr, c.NetSockFamilyKey.String(sockFamily))
+	}
+	if sockHostAddr != "" {
+		attr = append(attr, c.NetSockHostAddrKey.String(sockHostAddr))
+		if sockHostPort > 0 {
+			// Only if net.sock.host.addr is set should net.sock.host.port be.
+			attr = append(attr, c.NetSockHostPortKey.Int(sockHostPort))
+		}
+	}
+	return attr
+}
+
+func (c *netConv) HostName(name string) attribute.KeyValue {
+	return c.NetHostNameKey.String(name)
+}
+
+func (c *netConv) HostPort(port int) attribute.KeyValue {
+	return c.NetHostPortKey.Int(port)
+}
+
+// Client returns attributes for a client network connection to address. See
+// net.Dial for information about acceptable address values, address should be
+// the same as the one used to create conn. If conn is nil, only network peer
+// attributes will be returned that describe address. Otherwise, the socket
+// level information about conn will also be included.
+func (c *netConv) Client(address string, conn net.Conn) []attribute.KeyValue {
+	if conn == nil {
+		return c.Peer(address)
+	}
+
+	lAddr, rAddr := conn.LocalAddr(), conn.RemoteAddr()
+
+	var network string
+	switch {
+	case lAddr != nil:
+		network = lAddr.Network()
+	case rAddr != nil:
+		network = rAddr.Network()
+	default:
+		return c.Peer(address)
+	}
+
+	peerName, peerPort := splitHostPort(address)
+	var (
+		sockFamily   string
+		sockPeerAddr string
+		sockPeerPort int
+		sockHostAddr string
+		sockHostPort int
+	)
+
+	if lAddr != nil {
+		sockHostAddr, sockHostPort = splitHostPort(lAddr.String())
+	}
+
+	if rAddr != nil {
+		sockPeerAddr, sockPeerPort = splitHostPort(rAddr.String())
+	}
+
+	switch {
+	case sockHostAddr != "":
+		sockFamily = family(network, sockHostAddr)
+	case sockPeerAddr != "":
+		sockFamily = family(network, sockPeerAddr)
+	}
+
+	n := nonZeroStr(peerName, network, sockPeerAddr, sockHostAddr, sockFamily)
+	n += positiveInt(peerPort, sockPeerPort, sockHostPort)
+	attr := make([]attribute.KeyValue, 0, n)
+	if peerName != "" {
+		attr = append(attr, c.PeerName(peerName))
+		if peerPort > 0 {
+			// Only if net.peer.name is set should net.peer.port be.
+			attr = append(attr, c.PeerPort(peerPort))
+		}
+	}
+	if network != "" {
+		attr = append(attr, c.Transport(network))
+	}
+	if sockFamily != "" {
+		attr = append(attr, c.NetSockFamilyKey.String(sockFamily))
+	}
+	if sockPeerAddr != "" {
+		attr = append(attr, c.NetSockPeerAddrKey.String(sockPeerAddr))
+		if sockPeerPort > 0 {
+			// Only if net.sock.peer.addr is set should net.sock.peer.port be.
+			attr = append(attr, c.NetSockPeerPortKey.Int(sockPeerPort))
+		}
+	}
+	if sockHostAddr != "" {
+		attr = append(attr, c.NetSockHostAddrKey.String(sockHostAddr))
+		if sockHostPort > 0 {
+			// Only if net.sock.host.addr is set should net.sock.host.port be.
+			attr = append(attr, c.NetSockHostPortKey.Int(sockHostPort))
+		}
+	}
+	return attr
+}
+
+func family(network, address string) string {
+	switch network {
+	case "unix", "unixgram", "unixpacket":
+		return "unix"
+	default:
+		if ip := net.ParseIP(address); ip != nil {
+			if ip.To4() == nil {
+				return "inet6"
+			}
+			return "inet"
+		}
+	}
+	return ""
+}
+
+func nonZeroStr(strs ...string) int {
+	var n int
+	for _, str := range strs {
+		if str != "" {
+			n++
+		}
+	}
+	return n
+}
+
+func positiveInt(ints ...int) int {
+	var n int
+	for _, i := range ints {
+		if i > 0 {
+			n++
+		}
+	}
+	return n
+}
+
+// Peer returns attributes for a network peer address.
+func (c *netConv) Peer(address string) []attribute.KeyValue {
+	h, p := splitHostPort(address)
+	var n int
+	if h != "" {
+		n++
+		if p > 0 {
+			n++
+		}
+	}
+
+	if n == 0 {
+		return nil
+	}
+
+	attrs := make([]attribute.KeyValue, 0, n)
+	attrs = append(attrs, c.PeerName(h))
+	if p > 0 {
+		attrs = append(attrs, c.PeerPort(int(p)))
+	}
+	return attrs
+}
+
+func (c *netConv) PeerName(name string) attribute.KeyValue {
+	return c.NetPeerNameKey.String(name)
+}
+
+func (c *netConv) PeerPort(port int) attribute.KeyValue {
+	return c.NetPeerPortKey.Int(port)
+}
+
+func (c *netConv) SockPeerAddr(addr string) attribute.KeyValue {
+	return c.NetSockPeerAddrKey.String(addr)
+}
+
+func (c *netConv) SockPeerPort(port int) attribute.KeyValue {
+	return c.NetSockPeerPortKey.Int(port)
+}
+
+// splitHostPort splits a network address hostport of the form "host",
+// "host%zone", "[host]", "[host%zone], "host:port", "host%zone:port",
+// "[host]:port", "[host%zone]:port", or ":port" into host or host%zone and
+// port.
+//
+// An empty host is returned if it is not provided or unparsable. A negative
+// port is returned if it is not provided or unparsable.
+func splitHostPort(hostport string) (host string, port int) {
+	port = -1
+
+	if strings.HasPrefix(hostport, "[") {
+		addrEnd := strings.LastIndex(hostport, "]")
+		if addrEnd < 0 {
+			// Invalid hostport.
+			return
+		}
+		if i := strings.LastIndex(hostport[addrEnd:], ":"); i < 0 {
+			host = hostport[1:addrEnd]
+			return
+		}
+	} else {
+		if i := strings.LastIndex(hostport, ":"); i < 0 {
+			host = hostport
+			return
+		}
+	}
+
+	host, pStr, err := net.SplitHostPort(hostport)
+	if err != nil {
+		return
+	}
+
+	p, err := strconv.ParseUint(pStr, 10, 16)
+	if err != nil {
+		return
+	}
+	return host, int(p)
+}

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/labeler.go

@@ -0,0 +1,65 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+
+import (
+	"context"
+	"sync"
+
+	"go.opentelemetry.io/otel/attribute"
+)
+
+// Labeler is used to allow instrumented HTTP handlers to add custom attributes to
+// the metrics recorded by the net/http instrumentation.
+type Labeler struct {
+	mu         sync.Mutex
+	attributes []attribute.KeyValue
+}
+
+// Add attributes to a Labeler.
+func (l *Labeler) Add(ls ...attribute.KeyValue) {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	l.attributes = append(l.attributes, ls...)
+}
+
+// Get returns a copy of the attributes added to the Labeler.
+func (l *Labeler) Get() []attribute.KeyValue {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	ret := make([]attribute.KeyValue, len(l.attributes))
+	copy(ret, l.attributes)
+	return ret
+}
+
+type labelerContextKeyType int
+
+const lablelerContextKey labelerContextKeyType = 0
+
+func injectLabeler(ctx context.Context, l *Labeler) context.Context {
+	return context.WithValue(ctx, lablelerContextKey, l)
+}
+
+// LabelerFromContext retrieves a Labeler instance from the provided context if
+// one is available.  If no Labeler was found in the provided context a new, empty
+// Labeler is returned and the second return value is false.  In this case it is
+// safe to use the Labeler but any attributes added to it will not be used.
+func LabelerFromContext(ctx context.Context) (*Labeler, bool) {
+	l, ok := ctx.Value(lablelerContextKey).(*Labeler)
+	if !ok {
+		l = &Labeler{}
+	}
+	return l, ok
+}

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/transport.go

@@ -0,0 +1,193 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"net/http/httptrace"
+
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil"
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/codes"
+	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// Transport implements the http.RoundTripper interface and wraps
+// outbound HTTP(S) requests with a span.
+type Transport struct {
+	rt http.RoundTripper
+
+	tracer            trace.Tracer
+	propagators       propagation.TextMapPropagator
+	spanStartOptions  []trace.SpanStartOption
+	filters           []Filter
+	spanNameFormatter func(string, *http.Request) string
+	clientTrace       func(context.Context) *httptrace.ClientTrace
+}
+
+var _ http.RoundTripper = &Transport{}
+
+// NewTransport wraps the provided http.RoundTripper with one that
+// starts a span and injects the span context into the outbound request headers.
+//
+// If the provided http.RoundTripper is nil, http.DefaultTransport will be used
+// as the base http.RoundTripper.
+func NewTransport(base http.RoundTripper, opts ...Option) *Transport {
+	if base == nil {
+		base = http.DefaultTransport
+	}
+
+	t := Transport{
+		rt: base,
+	}
+
+	defaultOpts := []Option{
+		WithSpanOptions(trace.WithSpanKind(trace.SpanKindClient)),
+		WithSpanNameFormatter(defaultTransportFormatter),
+	}
+
+	c := newConfig(append(defaultOpts, opts...)...)
+	t.applyConfig(c)
+
+	return &t
+}
+
+func (t *Transport) applyConfig(c *config) {
+	t.tracer = c.Tracer
+	t.propagators = c.Propagators
+	t.spanStartOptions = c.SpanStartOptions
+	t.filters = c.Filters
+	t.spanNameFormatter = c.SpanNameFormatter
+	t.clientTrace = c.ClientTrace
+}
+
+func defaultTransportFormatter(_ string, r *http.Request) string {
+	return "HTTP " + r.Method
+}
+
+// RoundTrip creates a Span and propagates its context via the provided request's headers
+// before handing the request to the configured base RoundTripper. The created span will
+// end when the response body is closed or when a read from the body returns io.EOF.
+func (t *Transport) RoundTrip(r *http.Request) (*http.Response, error) {
+	for _, f := range t.filters {
+		if !f(r) {
+			// Simply pass through to the base RoundTripper if a filter rejects the request
+			return t.rt.RoundTrip(r)
+		}
+	}
+
+	tracer := t.tracer
+
+	if tracer == nil {
+		if span := trace.SpanFromContext(r.Context()); span.SpanContext().IsValid() {
+			tracer = newTracer(span.TracerProvider())
+		} else {
+			tracer = newTracer(otel.GetTracerProvider())
+		}
+	}
+
+	opts := append([]trace.SpanStartOption{}, t.spanStartOptions...) // start with the configured options
+
+	ctx, span := tracer.Start(r.Context(), t.spanNameFormatter("", r), opts...)
+
+	if t.clientTrace != nil {
+		ctx = httptrace.WithClientTrace(ctx, t.clientTrace(ctx))
+	}
+
+	r = r.Clone(ctx) // According to RoundTripper spec, we shouldn't modify the origin request.
+	span.SetAttributes(semconvutil.HTTPClientRequest(r)...)
+	t.propagators.Inject(ctx, propagation.HeaderCarrier(r.Header))
+
+	res, err := t.rt.RoundTrip(r)
+	if err != nil {
+		span.RecordError(err)
+		span.SetStatus(codes.Error, err.Error())
+		span.End()
+		return res, err
+	}
+
+	span.SetAttributes(semconvutil.HTTPClientResponse(res)...)
+	span.SetStatus(semconvutil.HTTPClientStatus(res.StatusCode))
+	res.Body = newWrappedBody(span, res.Body)
+
+	return res, err
+}
+
+// newWrappedBody returns a new and appropriately scoped *wrappedBody as an
+// io.ReadCloser. If the passed body implements io.Writer, the returned value
+// will implement io.ReadWriteCloser.
+func newWrappedBody(span trace.Span, body io.ReadCloser) io.ReadCloser {
+	// The successful protocol switch responses will have a body that
+	// implement an io.ReadWriteCloser. Ensure this interface type continues
+	// to be satisfied if that is the case.
+	if _, ok := body.(io.ReadWriteCloser); ok {
+		return &wrappedBody{span: span, body: body}
+	}
+
+	// Remove the implementation of the io.ReadWriteCloser and only implement
+	// the io.ReadCloser.
+	return struct{ io.ReadCloser }{&wrappedBody{span: span, body: body}}
+}
+
+// wrappedBody is the response body type returned by the transport
+// instrumentation to complete a span. Errors encountered when using the
+// response body are recorded in span tracking the response.
+//
+// The span tracking the response is ended when this body is closed.
+//
+// If the response body implements the io.Writer interface (i.e. for
+// successful protocol switches), the wrapped body also will.
+type wrappedBody struct {
+	span trace.Span
+	body io.ReadCloser
+}
+
+var _ io.ReadWriteCloser = &wrappedBody{}
+
+func (wb *wrappedBody) Write(p []byte) (int, error) {
+	// This will not panic given the guard in newWrappedBody.
+	n, err := wb.body.(io.Writer).Write(p)
+	if err != nil {
+		wb.span.RecordError(err)
+		wb.span.SetStatus(codes.Error, err.Error())
+	}
+	return n, err
+}
+
+func (wb *wrappedBody) Read(b []byte) (int, error) {
+	n, err := wb.body.Read(b)
+
+	switch err {
+	case nil:
+		// nothing to do here but fall through to the return
+	case io.EOF:
+		wb.span.End()
+	default:
+		wb.span.RecordError(err)
+		wb.span.SetStatus(codes.Error, err.Error())
+	}
+	return n, err
+}
+
+func (wb *wrappedBody) Close() error {
+	wb.span.End()
+	if wb.body != nil {
+		return wb.body.Close()
+	}
+	return nil
+}

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/version.go

@@ -0,0 +1,28 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+
+// Version is the current release version of the otelhttp instrumentation.
+func Version() string {
+	return "0.45.0"
+	// This string is updated by the pre_release.sh script during release
+}
+
+// SemVersion is the semantic version to be supplied to tracer/meter creation.
+//
+// Deprecated: Use [Version] instead.
+func SemVersion() string {
+	return Version()
+}

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/wrap.go

@@ -0,0 +1,99 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+
+import (
+	"context"
+	"io"
+	"net/http"
+
+	"go.opentelemetry.io/otel/propagation"
+)
+
+var _ io.ReadCloser = &bodyWrapper{}
+
+// bodyWrapper wraps a http.Request.Body (an io.ReadCloser) to track the number
+// of bytes read and the last error.
+type bodyWrapper struct {
+	io.ReadCloser
+	record func(n int64) // must not be nil
+
+	read int64
+	err  error
+}
+
+func (w *bodyWrapper) Read(b []byte) (int, error) {
+	n, err := w.ReadCloser.Read(b)
+	n1 := int64(n)
+	w.read += n1
+	w.err = err
+	w.record(n1)
+	return n, err
+}
+
+func (w *bodyWrapper) Close() error {
+	return w.ReadCloser.Close()
+}
+
+var _ http.ResponseWriter = &respWriterWrapper{}
+
+// respWriterWrapper wraps a http.ResponseWriter in order to track the number of
+// bytes written, the last error, and to catch the first written statusCode.
+// TODO: The wrapped http.ResponseWriter doesn't implement any of the optional
+// types (http.Hijacker, http.Pusher, http.CloseNotifier, http.Flusher, etc)
+// that may be useful when using it in real life situations.
+type respWriterWrapper struct {
+	http.ResponseWriter
+	record func(n int64) // must not be nil
+
+	// used to inject the header
+	ctx context.Context
+
+	props propagation.TextMapPropagator
+
+	written     int64
+	statusCode  int
+	err         error
+	wroteHeader bool
+}
+
+func (w *respWriterWrapper) Header() http.Header {
+	return w.ResponseWriter.Header()
+}
+
+func (w *respWriterWrapper) Write(p []byte) (int, error) {
+	if !w.wroteHeader {
+		w.WriteHeader(http.StatusOK)
+	}
+	n, err := w.ResponseWriter.Write(p)
+	n1 := int64(n)
+	w.record(n1)
+	w.written += n1
+	w.err = err
+	return n, err
+}
+
+// WriteHeader persists initial statusCode for span attribution.
+// All calls to WriteHeader will be propagated to the underlying ResponseWriter
+// and will persist the statusCode from the first call.
+// Blocking consecutive calls to WriteHeader alters expected behavior and will
+// remove warning logs from net/http where developers will notice incorrect handler implementations.
+func (w *respWriterWrapper) WriteHeader(statusCode int) {
+	if !w.wroteHeader {
+		w.wroteHeader = true
+		w.statusCode = statusCode
+	}
+	w.ResponseWriter.WriteHeader(statusCode)
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+          notices within Derivative Works that You distribute, alongside
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+          that such additional attribution notices cannot be construed
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+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
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+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
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+      of your accepting any such warranty or additional liability.
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+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/README.md

@@ -0,0 +1,51 @@
+# OpenTelemetry-Go OTLP Span Exporter
+
+[![Go Reference](https://pkg.go.dev/badge/go.opentelemetry.io/otel/exporters/otlp/otlptrace.svg)](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace)
+
+[OpenTelemetry Protocol Exporter](https://github.com/open-telemetry/opentelemetry-specification/blob/v1.20.0/specification/protocol/exporter.md) implementation.
+
+## Installation
+
+```
+go get -u go.opentelemetry.io/otel/exporters/otlp/otlptrace
+```
+
+## Examples
+
+- [HTTP Exporter setup and examples](./otlptracehttp/example_test.go)
+- [Full example of gRPC Exporter sending telemetry to a local collector](../../../example/otel-collector)
+
+## [`otlptrace`](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace)
+
+The `otlptrace` package provides an exporter implementing the OTel span exporter interface.
+This exporter is configured using a client satisfying the `otlptrace.Client` interface.
+This client handles the transformation of data into wire format and the transmission of that data to the collector.
+
+## [`otlptracegrpc`](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc)
+
+The `otlptracegrpc` package implements a client for the span exporter that sends trace telemetry data to the collector using gRPC with protobuf-encoded payloads.
+
+## [`otlptracehttp`](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp)
+
+The `otlptracehttp` package implements a client for the span exporter that sends trace telemetry data to the collector using HTTP with protobuf-encoded payloads.
+
+## Configuration
+
+### Environment Variables
+
+The following environment variables can be used (instead of options objects) to
+override the default configuration. For more information about how each of
+these environment variables is interpreted, see [the OpenTelemetry
+specification](https://github.com/open-telemetry/opentelemetry-specification/blob/v1.20.0/specification/protocol/exporter.md).
+
+| Environment variable                                                     | Option                        | Default value                                            |
+| ------------------------------------------------------------------------ |------------------------------ | -------------------------------------------------------- |
+| `OTEL_EXPORTER_OTLP_ENDPOINT` `OTEL_EXPORTER_OTLP_TRACES_ENDPOINT`       | `WithEndpoint` `WithInsecure` | `https://localhost:4317` or `https://localhost:4318`[^1] |
+| `OTEL_EXPORTER_OTLP_CERTIFICATE` `OTEL_EXPORTER_OTLP_TRACES_CERTIFICATE` | `WithTLSClientConfig`         |                                                          |
+| `OTEL_EXPORTER_OTLP_HEADERS` `OTEL_EXPORTER_OTLP_TRACES_HEADERS`         | `WithHeaders`                 |                                                          |
+| `OTEL_EXPORTER_OTLP_COMPRESSION` `OTEL_EXPORTER_OTLP_TRACES_COMPRESSION` | `WithCompression`             |                                                          |
+| `OTEL_EXPORTER_OTLP_TIMEOUT` `OTEL_EXPORTER_OTLP_TRACES_TIMEOUT`         | `WithTimeout`                 | `10s`                                                    |
+
+[^1]: The gRPC client defaults to `https://localhost:4317` and the HTTP client `https://localhost:4318`.
+
+Configuration using options have precedence over the environment variables.

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/clients.go

@@ -0,0 +1,54 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+
+import (
+	"context"
+
+	tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
+)
+
+// Client manages connections to the collector, handles the
+// transformation of data into wire format, and the transmission of that
+// data to the collector.
+type Client interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Start should establish connection(s) to endpoint(s). It is
+	// called just once by the exporter, so the implementation
+	// does not need to worry about idempotence and locking.
+	Start(ctx context.Context) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Stop should close the connections. The function is called
+	// only once by the exporter, so the implementation does not
+	// need to worry about idempotence, but it may be called
+	// concurrently with UploadTraces, so proper
+	// locking is required. The function serves as a
+	// synchronization point - after the function returns, the
+	// process of closing connections is assumed to be finished.
+	Stop(ctx context.Context) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// UploadTraces should transform the passed traces to the wire
+	// format and send it to the collector. May be called
+	// concurrently.
+	UploadTraces(ctx context.Context, protoSpans []*tracepb.ResourceSpans) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/exporter.go

@@ -0,0 +1,118 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sync"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
+	tracesdk "go.opentelemetry.io/otel/sdk/trace"
+)
+
+var (
+	errAlreadyStarted = errors.New("already started")
+)
+
+// Exporter exports trace data in the OTLP wire format.
+type Exporter struct {
+	client Client
+
+	mu      sync.RWMutex
+	started bool
+
+	startOnce sync.Once
+	stopOnce  sync.Once
+}
+
+// ExportSpans exports a batch of spans.
+func (e *Exporter) ExportSpans(ctx context.Context, ss []tracesdk.ReadOnlySpan) error {
+	protoSpans := tracetransform.Spans(ss)
+	if len(protoSpans) == 0 {
+		return nil
+	}
+
+	err := e.client.UploadTraces(ctx, protoSpans)
+	if err != nil {
+		return fmt.Errorf("traces export: %w", err)
+	}
+	return nil
+}
+
+// Start establishes a connection to the receiving endpoint.
+func (e *Exporter) Start(ctx context.Context) error {
+	var err = errAlreadyStarted
+	e.startOnce.Do(func() {
+		e.mu.Lock()
+		e.started = true
+		e.mu.Unlock()
+		err = e.client.Start(ctx)
+	})
+
+	return err
+}
+
+// Shutdown flushes all exports and closes all connections to the receiving endpoint.
+func (e *Exporter) Shutdown(ctx context.Context) error {
+	e.mu.RLock()
+	started := e.started
+	e.mu.RUnlock()
+
+	if !started {
+		return nil
+	}
+
+	var err error
+
+	e.stopOnce.Do(func() {
+		err = e.client.Stop(ctx)
+		e.mu.Lock()
+		e.started = false
+		e.mu.Unlock()
+	})
+
+	return err
+}
+
+var _ tracesdk.SpanExporter = (*Exporter)(nil)
+
+// New constructs a new Exporter and starts it.
+func New(ctx context.Context, client Client) (*Exporter, error) {
+	exp := NewUnstarted(client)
+	if err := exp.Start(ctx); err != nil {
+		return nil, err
+	}
+	return exp, nil
+}
+
+// NewUnstarted constructs a new Exporter and does not start it.
+func NewUnstarted(client Client) *Exporter {
+	return &Exporter{
+		client: client,
+	}
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent this exporter.
+func (e *Exporter) MarshalLog() interface{} {
+	return struct {
+		Type   string
+		Client Client
+	}{
+		Type:   "otlptrace",
+		Client: e.client,
+	}
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/attribute.go

@@ -0,0 +1,158 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
+
+import (
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/sdk/resource"
+	commonpb "go.opentelemetry.io/proto/otlp/common/v1"
+)
+
+// KeyValues transforms a slice of attribute KeyValues into OTLP key-values.
+func KeyValues(attrs []attribute.KeyValue) []*commonpb.KeyValue {
+	if len(attrs) == 0 {
+		return nil
+	}
+
+	out := make([]*commonpb.KeyValue, 0, len(attrs))
+	for _, kv := range attrs {
+		out = append(out, KeyValue(kv))
+	}
+	return out
+}
+
+// Iterator transforms an attribute iterator into OTLP key-values.
+func Iterator(iter attribute.Iterator) []*commonpb.KeyValue {
+	l := iter.Len()
+	if l == 0 {
+		return nil
+	}
+
+	out := make([]*commonpb.KeyValue, 0, l)
+	for iter.Next() {
+		out = append(out, KeyValue(iter.Attribute()))
+	}
+	return out
+}
+
+// ResourceAttributes transforms a Resource OTLP key-values.
+func ResourceAttributes(res *resource.Resource) []*commonpb.KeyValue {
+	return Iterator(res.Iter())
+}
+
+// KeyValue transforms an attribute KeyValue into an OTLP key-value.
+func KeyValue(kv attribute.KeyValue) *commonpb.KeyValue {
+	return &commonpb.KeyValue{Key: string(kv.Key), Value: Value(kv.Value)}
+}
+
+// Value transforms an attribute Value into an OTLP AnyValue.
+func Value(v attribute.Value) *commonpb.AnyValue {
+	av := new(commonpb.AnyValue)
+	switch v.Type() {
+	case attribute.BOOL:
+		av.Value = &commonpb.AnyValue_BoolValue{
+			BoolValue: v.AsBool(),
+		}
+	case attribute.BOOLSLICE:
+		av.Value = &commonpb.AnyValue_ArrayValue{
+			ArrayValue: &commonpb.ArrayValue{
+				Values: boolSliceValues(v.AsBoolSlice()),
+			},
+		}
+	case attribute.INT64:
+		av.Value = &commonpb.AnyValue_IntValue{
+			IntValue: v.AsInt64(),
+		}
+	case attribute.INT64SLICE:
+		av.Value = &commonpb.AnyValue_ArrayValue{
+			ArrayValue: &commonpb.ArrayValue{
+				Values: int64SliceValues(v.AsInt64Slice()),
+			},
+		}
+	case attribute.FLOAT64:
+		av.Value = &commonpb.AnyValue_DoubleValue{
+			DoubleValue: v.AsFloat64(),
+		}
+	case attribute.FLOAT64SLICE:
+		av.Value = &commonpb.AnyValue_ArrayValue{
+			ArrayValue: &commonpb.ArrayValue{
+				Values: float64SliceValues(v.AsFloat64Slice()),
+			},
+		}
+	case attribute.STRING:
+		av.Value = &commonpb.AnyValue_StringValue{
+			StringValue: v.AsString(),
+		}
+	case attribute.STRINGSLICE:
+		av.Value = &commonpb.AnyValue_ArrayValue{
+			ArrayValue: &commonpb.ArrayValue{
+				Values: stringSliceValues(v.AsStringSlice()),
+			},
+		}
+	default:
+		av.Value = &commonpb.AnyValue_StringValue{
+			StringValue: "INVALID",
+		}
+	}
+	return av
+}
+
+func boolSliceValues(vals []bool) []*commonpb.AnyValue {
+	converted := make([]*commonpb.AnyValue, len(vals))
+	for i, v := range vals {
+		converted[i] = &commonpb.AnyValue{
+			Value: &commonpb.AnyValue_BoolValue{
+				BoolValue: v,
+			},
+		}
+	}
+	return converted
+}
+
+func int64SliceValues(vals []int64) []*commonpb.AnyValue {
+	converted := make([]*commonpb.AnyValue, len(vals))
+	for i, v := range vals {
+		converted[i] = &commonpb.AnyValue{
+			Value: &commonpb.AnyValue_IntValue{
+				IntValue: v,
+			},
+		}
+	}
+	return converted
+}
+
+func float64SliceValues(vals []float64) []*commonpb.AnyValue {
+	converted := make([]*commonpb.AnyValue, len(vals))
+	for i, v := range vals {
+		converted[i] = &commonpb.AnyValue{
+			Value: &commonpb.AnyValue_DoubleValue{
+				DoubleValue: v,
+			},
+		}
+	}
+	return converted
+}
+
+func stringSliceValues(vals []string) []*commonpb.AnyValue {
+	converted := make([]*commonpb.AnyValue, len(vals))
+	for i, v := range vals {
+		converted[i] = &commonpb.AnyValue{
+			Value: &commonpb.AnyValue_StringValue{
+				StringValue: v,
+			},
+		}
+	}
+	return converted
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/instrumentation.go

@@ -0,0 +1,30 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
+
+import (
+	"go.opentelemetry.io/otel/sdk/instrumentation"
+	commonpb "go.opentelemetry.io/proto/otlp/common/v1"
+)
+
+func InstrumentationScope(il instrumentation.Scope) *commonpb.InstrumentationScope {
+	if il == (instrumentation.Scope{}) {
+		return nil
+	}
+	return &commonpb.InstrumentationScope{
+		Name:    il.Name,
+		Version: il.Version,
+	}
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/resource.go

@@ -0,0 +1,28 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
+
+import (
+	"go.opentelemetry.io/otel/sdk/resource"
+	resourcepb "go.opentelemetry.io/proto/otlp/resource/v1"
+)
+
+// Resource transforms a Resource into an OTLP Resource.
+func Resource(r *resource.Resource) *resourcepb.Resource {
+	if r == nil {
+		return nil
+	}
+	return &resourcepb.Resource{Attributes: ResourceAttributes(r)}
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/span.go

@@ -0,0 +1,205 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
+
+import (
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+	"go.opentelemetry.io/otel/sdk/instrumentation"
+	tracesdk "go.opentelemetry.io/otel/sdk/trace"
+	"go.opentelemetry.io/otel/trace"
+	tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
+)
+
+// Spans transforms a slice of OpenTelemetry spans into a slice of OTLP
+// ResourceSpans.
+func Spans(sdl []tracesdk.ReadOnlySpan) []*tracepb.ResourceSpans {
+	if len(sdl) == 0 {
+		return nil
+	}
+
+	rsm := make(map[attribute.Distinct]*tracepb.ResourceSpans)
+
+	type key struct {
+		r  attribute.Distinct
+		is instrumentation.Scope
+	}
+	ssm := make(map[key]*tracepb.ScopeSpans)
+
+	var resources int
+	for _, sd := range sdl {
+		if sd == nil {
+			continue
+		}
+
+		rKey := sd.Resource().Equivalent()
+		k := key{
+			r:  rKey,
+			is: sd.InstrumentationScope(),
+		}
+		scopeSpan, iOk := ssm[k]
+		if !iOk {
+			// Either the resource or instrumentation scope were unknown.
+			scopeSpan = &tracepb.ScopeSpans{
+				Scope:     InstrumentationScope(sd.InstrumentationScope()),
+				Spans:     []*tracepb.Span{},
+				SchemaUrl: sd.InstrumentationScope().SchemaURL,
+			}
+		}
+		scopeSpan.Spans = append(scopeSpan.Spans, span(sd))
+		ssm[k] = scopeSpan
+
+		rs, rOk := rsm[rKey]
+		if !rOk {
+			resources++
+			// The resource was unknown.
+			rs = &tracepb.ResourceSpans{
+				Resource:   Resource(sd.Resource()),
+				ScopeSpans: []*tracepb.ScopeSpans{scopeSpan},
+				SchemaUrl:  sd.Resource().SchemaURL(),
+			}
+			rsm[rKey] = rs
+			continue
+		}
+
+		// The resource has been seen before. Check if the instrumentation
+		// library lookup was unknown because if so we need to add it to the
+		// ResourceSpans. Otherwise, the instrumentation library has already
+		// been seen and the append we did above will be included it in the
+		// ScopeSpans reference.
+		if !iOk {
+			rs.ScopeSpans = append(rs.ScopeSpans, scopeSpan)
+		}
+	}
+
+	// Transform the categorized map into a slice
+	rss := make([]*tracepb.ResourceSpans, 0, resources)
+	for _, rs := range rsm {
+		rss = append(rss, rs)
+	}
+	return rss
+}
+
+// span transforms a Span into an OTLP span.
+func span(sd tracesdk.ReadOnlySpan) *tracepb.Span {
+	if sd == nil {
+		return nil
+	}
+
+	tid := sd.SpanContext().TraceID()
+	sid := sd.SpanContext().SpanID()
+
+	s := &tracepb.Span{
+		TraceId:                tid[:],
+		SpanId:                 sid[:],
+		TraceState:             sd.SpanContext().TraceState().String(),
+		Status:                 status(sd.Status().Code, sd.Status().Description),
+		StartTimeUnixNano:      uint64(sd.StartTime().UnixNano()),
+		EndTimeUnixNano:        uint64(sd.EndTime().UnixNano()),
+		Links:                  links(sd.Links()),
+		Kind:                   spanKind(sd.SpanKind()),
+		Name:                   sd.Name(),
+		Attributes:             KeyValues(sd.Attributes()),
+		Events:                 spanEvents(sd.Events()),
+		DroppedAttributesCount: uint32(sd.DroppedAttributes()),
+		DroppedEventsCount:     uint32(sd.DroppedEvents()),
+		DroppedLinksCount:      uint32(sd.DroppedLinks()),
+	}
+
+	if psid := sd.Parent().SpanID(); psid.IsValid() {
+		s.ParentSpanId = psid[:]
+	}
+
+	return s
+}
+
+// status transform a span code and message into an OTLP span status.
+func status(status codes.Code, message string) *tracepb.Status {
+	var c tracepb.Status_StatusCode
+	switch status {
+	case codes.Ok:
+		c = tracepb.Status_STATUS_CODE_OK
+	case codes.Error:
+		c = tracepb.Status_STATUS_CODE_ERROR
+	default:
+		c = tracepb.Status_STATUS_CODE_UNSET
+	}
+	return &tracepb.Status{
+		Code:    c,
+		Message: message,
+	}
+}
+
+// links transforms span Links to OTLP span links.
+func links(links []tracesdk.Link) []*tracepb.Span_Link {
+	if len(links) == 0 {
+		return nil
+	}
+
+	sl := make([]*tracepb.Span_Link, 0, len(links))
+	for _, otLink := range links {
+		// This redefinition is necessary to prevent otLink.*ID[:] copies
+		// being reused -- in short we need a new otLink per iteration.
+		otLink := otLink
+
+		tid := otLink.SpanContext.TraceID()
+		sid := otLink.SpanContext.SpanID()
+
+		sl = append(sl, &tracepb.Span_Link{
+			TraceId:                tid[:],
+			SpanId:                 sid[:],
+			Attributes:             KeyValues(otLink.Attributes),
+			DroppedAttributesCount: uint32(otLink.DroppedAttributeCount),
+		})
+	}
+	return sl
+}
+
+// spanEvents transforms span Events to an OTLP span events.
+func spanEvents(es []tracesdk.Event) []*tracepb.Span_Event {
+	if len(es) == 0 {
+		return nil
+	}
+
+	events := make([]*tracepb.Span_Event, len(es))
+	// Transform message events
+	for i := 0; i < len(es); i++ {
+		events[i] = &tracepb.Span_Event{
+			Name:                   es[i].Name,
+			TimeUnixNano:           uint64(es[i].Time.UnixNano()),
+			Attributes:             KeyValues(es[i].Attributes),
+			DroppedAttributesCount: uint32(es[i].DroppedAttributeCount),
+		}
+	}
+	return events
+}
+
+// spanKind transforms a SpanKind to an OTLP span kind.
+func spanKind(kind trace.SpanKind) tracepb.Span_SpanKind {
+	switch kind {
+	case trace.SpanKindInternal:
+		return tracepb.Span_SPAN_KIND_INTERNAL
+	case trace.SpanKindClient:
+		return tracepb.Span_SPAN_KIND_CLIENT
+	case trace.SpanKindServer:
+		return tracepb.Span_SPAN_KIND_SERVER
+	case trace.SpanKindProducer:
+		return tracepb.Span_SPAN_KIND_PRODUCER
+	case trace.SpanKindConsumer:
+		return tracepb.Span_SPAN_KIND_CONSUMER
+	default:
+		return tracepb.Span_SPAN_KIND_UNSPECIFIED
+	}
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/version.go

@@ -0,0 +1,20 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+
+// Version is the current release version of the OpenTelemetry OTLP trace exporter in use.
+func Version() string {
+	return "1.19.0"
+}

vendor/go.opentelemetry.io/otel/sdk/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
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+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
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+   3. Grant of Patent License. Subject to the terms and conditions of
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+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+
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+
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+
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+
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+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
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+      Work (including but not limited to damages for loss of goodwill,
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+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
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+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
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+      file or class name and description of purpose be included on the
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+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/go.opentelemetry.io/otel/sdk/instrumentation/doc.go

@@ -0,0 +1,24 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package instrumentation provides types to represent the code libraries that
+// provide OpenTelemetry instrumentation. These types are used in the
+// OpenTelemetry signal pipelines to identify the source of telemetry.
+//
+// See
+// https://github.com/open-telemetry/oteps/blob/d226b677d73a785523fe9b9701be13225ebc528d/text/0083-component.md
+// and
+// https://github.com/open-telemetry/oteps/blob/d226b677d73a785523fe9b9701be13225ebc528d/text/0201-scope-attributes.md
+// for more information.
+package instrumentation // import "go.opentelemetry.io/otel/sdk/instrumentation"

vendor/go.opentelemetry.io/otel/sdk/instrumentation/library.go

@@ -0,0 +1,19 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package instrumentation // import "go.opentelemetry.io/otel/sdk/instrumentation"
+
+// Library represents the instrumentation library.
+// Deprecated: please use Scope instead.
+type Library = Scope

vendor/go.opentelemetry.io/otel/sdk/instrumentation/scope.go

@@ -0,0 +1,26 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package instrumentation // import "go.opentelemetry.io/otel/sdk/instrumentation"
+
+// Scope represents the instrumentation scope.
+type Scope struct {
+	// Name is the name of the instrumentation scope. This should be the
+	// Go package name of that scope.
+	Name string
+	// Version is the version of the instrumentation scope.
+	Version string
+	// SchemaURL of the telemetry emitted by the scope.
+	SchemaURL string
+}

vendor/go.opentelemetry.io/otel/sdk/internal/env/env.go

@@ -0,0 +1,177 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package env // import "go.opentelemetry.io/otel/sdk/internal/env"
+
+import (
+	"os"
+	"strconv"
+
+	"go.opentelemetry.io/otel/internal/global"
+)
+
+// Environment variable names.
+const (
+	// BatchSpanProcessorScheduleDelayKey is the delay interval between two
+	// consecutive exports (i.e. 5000).
+	BatchSpanProcessorScheduleDelayKey = "OTEL_BSP_SCHEDULE_DELAY"
+	// BatchSpanProcessorExportTimeoutKey is the maximum allowed time to
+	// export data (i.e. 3000).
+	BatchSpanProcessorExportTimeoutKey = "OTEL_BSP_EXPORT_TIMEOUT"
+	// BatchSpanProcessorMaxQueueSizeKey is the maximum queue size (i.e. 2048).
+	BatchSpanProcessorMaxQueueSizeKey = "OTEL_BSP_MAX_QUEUE_SIZE"
+	// BatchSpanProcessorMaxExportBatchSizeKey is the maximum batch size (i.e.
+	// 512). Note: it must be less than or equal to
+	// EnvBatchSpanProcessorMaxQueueSize.
+	BatchSpanProcessorMaxExportBatchSizeKey = "OTEL_BSP_MAX_EXPORT_BATCH_SIZE"
+
+	// AttributeValueLengthKey is the maximum allowed attribute value size.
+	AttributeValueLengthKey = "OTEL_ATTRIBUTE_VALUE_LENGTH_LIMIT"
+
+	// AttributeCountKey is the maximum allowed span attribute count.
+	AttributeCountKey = "OTEL_ATTRIBUTE_COUNT_LIMIT"
+
+	// SpanAttributeValueLengthKey is the maximum allowed attribute value size
+	// for a span.
+	SpanAttributeValueLengthKey = "OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT"
+
+	// SpanAttributeCountKey is the maximum allowed span attribute count for a
+	// span.
+	SpanAttributeCountKey = "OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT"
+
+	// SpanEventCountKey is the maximum allowed span event count.
+	SpanEventCountKey = "OTEL_SPAN_EVENT_COUNT_LIMIT"
+
+	// SpanEventAttributeCountKey is the maximum allowed attribute per span
+	// event count.
+	SpanEventAttributeCountKey = "OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT"
+
+	// SpanLinkCountKey is the maximum allowed span link count.
+	SpanLinkCountKey = "OTEL_SPAN_LINK_COUNT_LIMIT"
+
+	// SpanLinkAttributeCountKey is the maximum allowed attribute per span
+	// link count.
+	SpanLinkAttributeCountKey = "OTEL_LINK_ATTRIBUTE_COUNT_LIMIT"
+)
+
+// firstInt returns the value of the first matching environment variable from
+// keys. If the value is not an integer or no match is found, defaultValue is
+// returned.
+func firstInt(defaultValue int, keys ...string) int {
+	for _, key := range keys {
+		value := os.Getenv(key)
+		if value == "" {
+			continue
+		}
+
+		intValue, err := strconv.Atoi(value)
+		if err != nil {
+			global.Info("Got invalid value, number value expected.", key, value)
+			return defaultValue
+		}
+
+		return intValue
+	}
+
+	return defaultValue
+}
+
+// IntEnvOr returns the int value of the environment variable with name key if
+// it exists, it is not empty, and the value is an int. Otherwise, defaultValue is returned.
+func IntEnvOr(key string, defaultValue int) int {
+	value := os.Getenv(key)
+	if value == "" {
+		return defaultValue
+	}
+
+	intValue, err := strconv.Atoi(value)
+	if err != nil {
+		global.Info("Got invalid value, number value expected.", key, value)
+		return defaultValue
+	}
+
+	return intValue
+}
+
+// BatchSpanProcessorScheduleDelay returns the environment variable value for
+// the OTEL_BSP_SCHEDULE_DELAY key if it exists, otherwise defaultValue is
+// returned.
+func BatchSpanProcessorScheduleDelay(defaultValue int) int {
+	return IntEnvOr(BatchSpanProcessorScheduleDelayKey, defaultValue)
+}
+
+// BatchSpanProcessorExportTimeout returns the environment variable value for
+// the OTEL_BSP_EXPORT_TIMEOUT key if it exists, otherwise defaultValue is
+// returned.
+func BatchSpanProcessorExportTimeout(defaultValue int) int {
+	return IntEnvOr(BatchSpanProcessorExportTimeoutKey, defaultValue)
+}
+
+// BatchSpanProcessorMaxQueueSize returns the environment variable value for
+// the OTEL_BSP_MAX_QUEUE_SIZE key if it exists, otherwise defaultValue is
+// returned.
+func BatchSpanProcessorMaxQueueSize(defaultValue int) int {
+	return IntEnvOr(BatchSpanProcessorMaxQueueSizeKey, defaultValue)
+}
+
+// BatchSpanProcessorMaxExportBatchSize returns the environment variable value for
+// the OTEL_BSP_MAX_EXPORT_BATCH_SIZE key if it exists, otherwise defaultValue
+// is returned.
+func BatchSpanProcessorMaxExportBatchSize(defaultValue int) int {
+	return IntEnvOr(BatchSpanProcessorMaxExportBatchSizeKey, defaultValue)
+}
+
+// SpanAttributeValueLength returns the environment variable value for the
+// OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT key if it exists. Otherwise, the
+// environment variable value for OTEL_ATTRIBUTE_VALUE_LENGTH_LIMIT is
+// returned or defaultValue if that is not set.
+func SpanAttributeValueLength(defaultValue int) int {
+	return firstInt(defaultValue, SpanAttributeValueLengthKey, AttributeValueLengthKey)
+}
+
+// SpanAttributeCount returns the environment variable value for the
+// OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT key if it exists. Otherwise, the
+// environment variable value for OTEL_ATTRIBUTE_COUNT_LIMIT is returned or
+// defaultValue if that is not set.
+func SpanAttributeCount(defaultValue int) int {
+	return firstInt(defaultValue, SpanAttributeCountKey, AttributeCountKey)
+}
+
+// SpanEventCount returns the environment variable value for the
+// OTEL_SPAN_EVENT_COUNT_LIMIT key if it exists, otherwise defaultValue is
+// returned.
+func SpanEventCount(defaultValue int) int {
+	return IntEnvOr(SpanEventCountKey, defaultValue)
+}
+
+// SpanEventAttributeCount returns the environment variable value for the
+// OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT key if it exists, otherwise defaultValue
+// is returned.
+func SpanEventAttributeCount(defaultValue int) int {
+	return IntEnvOr(SpanEventAttributeCountKey, defaultValue)
+}
+
+// SpanLinkCount returns the environment variable value for the
+// OTEL_SPAN_LINK_COUNT_LIMIT key if it exists, otherwise defaultValue is
+// returned.
+func SpanLinkCount(defaultValue int) int {
+	return IntEnvOr(SpanLinkCountKey, defaultValue)
+}
+
+// SpanLinkAttributeCount returns the environment variable value for the
+// OTEL_LINK_ATTRIBUTE_COUNT_LIMIT key if it exists, otherwise defaultValue is
+// returned.
+func SpanLinkAttributeCount(defaultValue int) int {
+	return IntEnvOr(SpanLinkAttributeCountKey, defaultValue)
+}

vendor/go.opentelemetry.io/otel/sdk/internal/gen.go

@@ -0,0 +1,29 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package internal // import "go.opentelemetry.io/otel/sdk/internal"
+
+//go:generate gotmpl --body=../../internal/shared/matchers/expectation.go.tmpl "--data={}" --out=matchers/expectation.go
+//go:generate gotmpl --body=../../internal/shared/matchers/expecter.go.tmpl "--data={}" --out=matchers/expecter.go
+//go:generate gotmpl --body=../../internal/shared/matchers/temporal_matcher.go.tmpl "--data={}" --out=matchers/temporal_matcher.go
+
+//go:generate gotmpl --body=../../internal/shared/internaltest/alignment.go.tmpl "--data={}" --out=internaltest/alignment.go
+//go:generate gotmpl --body=../../internal/shared/internaltest/env.go.tmpl "--data={}" --out=internaltest/env.go
+//go:generate gotmpl --body=../../internal/shared/internaltest/env_test.go.tmpl "--data={}" --out=internaltest/env_test.go
+//go:generate gotmpl --body=../../internal/shared/internaltest/errors.go.tmpl "--data={}" --out=internaltest/errors.go
+//go:generate gotmpl --body=../../internal/shared/internaltest/harness.go.tmpl "--data={\"matchersImportPath\": \"go.opentelemetry.io/otel/sdk/internal/matchers\"}" --out=internaltest/harness.go
+//go:generate gotmpl --body=../../internal/shared/internaltest/text_map_carrier.go.tmpl "--data={}" --out=internaltest/text_map_carrier.go
+//go:generate gotmpl --body=../../internal/shared/internaltest/text_map_carrier_test.go.tmpl "--data={}" --out=internaltest/text_map_carrier_test.go
+//go:generate gotmpl --body=../../internal/shared/internaltest/text_map_propagator.go.tmpl "--data={}" --out=internaltest/text_map_propagator.go
+//go:generate gotmpl --body=../../internal/shared/internaltest/text_map_propagator_test.go.tmpl "--data={}" --out=internaltest/text_map_propagator_test.go

vendor/go.opentelemetry.io/otel/sdk/internal/internal.go

@@ -0,0 +1,28 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package internal // import "go.opentelemetry.io/otel/sdk/internal"
+
+import "time"
+
+// MonotonicEndTime returns the end time at present
+// but offset from start, monotonically.
+//
+// The monotonic clock is used in subtractions hence
+// the duration since start added back to start gives
+// end as a monotonic time.
+// See https://golang.org/pkg/time/#hdr-Monotonic_Clocks
+func MonotonicEndTime(start time.Time) time.Time {
+	return start.Add(time.Since(start))
+}

vendor/go.opentelemetry.io/otel/sdk/resource/auto.go

@@ -0,0 +1,110 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+)
+
+var (
+	// ErrPartialResource is returned by a detector when complete source
+	// information for a Resource is unavailable or the source information
+	// contains invalid values that are omitted from the returned Resource.
+	ErrPartialResource = errors.New("partial resource")
+)
+
+// Detector detects OpenTelemetry resource information.
+type Detector interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Detect returns an initialized Resource based on gathered information.
+	// If the source information to construct a Resource contains invalid
+	// values, a Resource is returned with the valid parts of the source
+	// information used for initialization along with an appropriately
+	// wrapped ErrPartialResource error.
+	Detect(ctx context.Context) (*Resource, error)
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
+
+// Detect calls all input detectors sequentially and merges each result with the previous one.
+// It returns the merged error too.
+func Detect(ctx context.Context, detectors ...Detector) (*Resource, error) {
+	r := new(Resource)
+	return r, detect(ctx, r, detectors)
+}
+
+// detect runs all detectors using ctx and merges the result into res. This
+// assumes res is allocated and not nil, it will panic otherwise.
+func detect(ctx context.Context, res *Resource, detectors []Detector) error {
+	var (
+		r    *Resource
+		errs detectErrs
+		err  error
+	)
+
+	for _, detector := range detectors {
+		if detector == nil {
+			continue
+		}
+		r, err = detector.Detect(ctx)
+		if err != nil {
+			errs = append(errs, err)
+			if !errors.Is(err, ErrPartialResource) {
+				continue
+			}
+		}
+		r, err = Merge(res, r)
+		if err != nil {
+			errs = append(errs, err)
+		}
+		*res = *r
+	}
+
+	if len(errs) == 0 {
+		return nil
+	}
+	return errs
+}
+
+type detectErrs []error
+
+func (e detectErrs) Error() string {
+	errStr := make([]string, len(e))
+	for i, err := range e {
+		errStr[i] = fmt.Sprintf("* %s", err)
+	}
+
+	format := "%d errors occurred detecting resource:\n\t%s"
+	return fmt.Sprintf(format, len(e), strings.Join(errStr, "\n\t"))
+}
+
+func (e detectErrs) Unwrap() error {
+	switch len(e) {
+	case 0:
+		return nil
+	case 1:
+		return e[0]
+	}
+	return e[1:]
+}
+
+func (e detectErrs) Is(target error) bool {
+	return len(e) != 0 && errors.Is(e[0], target)
+}

vendor/go.opentelemetry.io/otel/sdk/resource/builtin.go

@@ -0,0 +1,108 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/sdk"
+	semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
+)
+
+type (
+	// telemetrySDK is a Detector that provides information about
+	// the OpenTelemetry SDK used.  This Detector is included as a
+	// builtin. If these resource attributes are not wanted, use
+	// the WithTelemetrySDK(nil) or WithoutBuiltin() options to
+	// explicitly disable them.
+	telemetrySDK struct{}
+
+	// host is a Detector that provides information about the host
+	// being run on. This Detector is included as a builtin. If
+	// these resource attributes are not wanted, use the
+	// WithHost(nil) or WithoutBuiltin() options to explicitly
+	// disable them.
+	host struct{}
+
+	stringDetector struct {
+		schemaURL string
+		K         attribute.Key
+		F         func() (string, error)
+	}
+
+	defaultServiceNameDetector struct{}
+)
+
+var (
+	_ Detector = telemetrySDK{}
+	_ Detector = host{}
+	_ Detector = stringDetector{}
+	_ Detector = defaultServiceNameDetector{}
+)
+
+// Detect returns a *Resource that describes the OpenTelemetry SDK used.
+func (telemetrySDK) Detect(context.Context) (*Resource, error) {
+	return NewWithAttributes(
+		semconv.SchemaURL,
+		semconv.TelemetrySDKName("opentelemetry"),
+		semconv.TelemetrySDKLanguageGo,
+		semconv.TelemetrySDKVersion(sdk.Version()),
+	), nil
+}
+
+// Detect returns a *Resource that describes the host being run on.
+func (host) Detect(ctx context.Context) (*Resource, error) {
+	return StringDetector(semconv.SchemaURL, semconv.HostNameKey, os.Hostname).Detect(ctx)
+}
+
+// StringDetector returns a Detector that will produce a *Resource
+// containing the string as a value corresponding to k. The resulting Resource
+// will have the specified schemaURL.
+func StringDetector(schemaURL string, k attribute.Key, f func() (string, error)) Detector {
+	return stringDetector{schemaURL: schemaURL, K: k, F: f}
+}
+
+// Detect returns a *Resource that describes the string as a value
+// corresponding to attribute.Key as well as the specific schemaURL.
+func (sd stringDetector) Detect(ctx context.Context) (*Resource, error) {
+	value, err := sd.F()
+	if err != nil {
+		return nil, fmt.Errorf("%s: %w", string(sd.K), err)
+	}
+	a := sd.K.String(value)
+	if !a.Valid() {
+		return nil, fmt.Errorf("invalid attribute: %q -> %q", a.Key, a.Value.Emit())
+	}
+	return NewWithAttributes(sd.schemaURL, sd.K.String(value)), nil
+}
+
+// Detect implements Detector.
+func (defaultServiceNameDetector) Detect(ctx context.Context) (*Resource, error) {
+	return StringDetector(
+		semconv.SchemaURL,
+		semconv.ServiceNameKey,
+		func() (string, error) {
+			executable, err := os.Executable()
+			if err != nil {
+				return "unknown_service:go", nil
+			}
+			return "unknown_service:" + filepath.Base(executable), nil
+		},
+	).Detect(ctx)
+}

vendor/go.opentelemetry.io/otel/sdk/resource/config.go

@@ -0,0 +1,206 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/attribute"
+)
+
+// config contains configuration for Resource creation.
+type config struct {
+	// detectors that will be evaluated.
+	detectors []Detector
+	// SchemaURL to associate with the Resource.
+	schemaURL string
+}
+
+// Option is the interface that applies a configuration option.
+type Option interface {
+	// apply sets the Option value of a config.
+	apply(config) config
+}
+
+// WithAttributes adds attributes to the configured Resource.
+func WithAttributes(attributes ...attribute.KeyValue) Option {
+	return WithDetectors(detectAttributes{attributes})
+}
+
+type detectAttributes struct {
+	attributes []attribute.KeyValue
+}
+
+func (d detectAttributes) Detect(context.Context) (*Resource, error) {
+	return NewSchemaless(d.attributes...), nil
+}
+
+// WithDetectors adds detectors to be evaluated for the configured resource.
+func WithDetectors(detectors ...Detector) Option {
+	return detectorsOption{detectors: detectors}
+}
+
+type detectorsOption struct {
+	detectors []Detector
+}
+
+func (o detectorsOption) apply(cfg config) config {
+	cfg.detectors = append(cfg.detectors, o.detectors...)
+	return cfg
+}
+
+// WithFromEnv adds attributes from environment variables to the configured resource.
+func WithFromEnv() Option {
+	return WithDetectors(fromEnv{})
+}
+
+// WithHost adds attributes from the host to the configured resource.
+func WithHost() Option {
+	return WithDetectors(host{})
+}
+
+// WithHostID adds host ID information to the configured resource.
+func WithHostID() Option {
+	return WithDetectors(hostIDDetector{})
+}
+
+// WithTelemetrySDK adds TelemetrySDK version info to the configured resource.
+func WithTelemetrySDK() Option {
+	return WithDetectors(telemetrySDK{})
+}
+
+// WithSchemaURL sets the schema URL for the configured resource.
+func WithSchemaURL(schemaURL string) Option {
+	return schemaURLOption(schemaURL)
+}
+
+type schemaURLOption string
+
+func (o schemaURLOption) apply(cfg config) config {
+	cfg.schemaURL = string(o)
+	return cfg
+}
+
+// WithOS adds all the OS attributes to the configured Resource.
+// See individual WithOS* functions to configure specific attributes.
+func WithOS() Option {
+	return WithDetectors(
+		osTypeDetector{},
+		osDescriptionDetector{},
+	)
+}
+
+// WithOSType adds an attribute with the operating system type to the configured Resource.
+func WithOSType() Option {
+	return WithDetectors(osTypeDetector{})
+}
+
+// WithOSDescription adds an attribute with the operating system description to the
+// configured Resource. The formatted string is equivalent to the output of the
+// `uname -snrvm` command.
+func WithOSDescription() Option {
+	return WithDetectors(osDescriptionDetector{})
+}
+
+// WithProcess adds all the Process attributes to the configured Resource.
+//
+// Warning! This option will include process command line arguments. If these
+// contain sensitive information it will be included in the exported resource.
+//
+// This option is equivalent to calling WithProcessPID,
+// WithProcessExecutableName, WithProcessExecutablePath,
+// WithProcessCommandArgs, WithProcessOwner, WithProcessRuntimeName,
+// WithProcessRuntimeVersion, and WithProcessRuntimeDescription. See each
+// option function for information about what resource attributes each
+// includes.
+func WithProcess() Option {
+	return WithDetectors(
+		processPIDDetector{},
+		processExecutableNameDetector{},
+		processExecutablePathDetector{},
+		processCommandArgsDetector{},
+		processOwnerDetector{},
+		processRuntimeNameDetector{},
+		processRuntimeVersionDetector{},
+		processRuntimeDescriptionDetector{},
+	)
+}
+
+// WithProcessPID adds an attribute with the process identifier (PID) to the
+// configured Resource.
+func WithProcessPID() Option {
+	return WithDetectors(processPIDDetector{})
+}
+
+// WithProcessExecutableName adds an attribute with the name of the process
+// executable to the configured Resource.
+func WithProcessExecutableName() Option {
+	return WithDetectors(processExecutableNameDetector{})
+}
+
+// WithProcessExecutablePath adds an attribute with the full path to the process
+// executable to the configured Resource.
+func WithProcessExecutablePath() Option {
+	return WithDetectors(processExecutablePathDetector{})
+}
+
+// WithProcessCommandArgs adds an attribute with all the command arguments (including
+// the command/executable itself) as received by the process to the configured
+// Resource.
+//
+// Warning! This option will include process command line arguments. If these
+// contain sensitive information it will be included in the exported resource.
+func WithProcessCommandArgs() Option {
+	return WithDetectors(processCommandArgsDetector{})
+}
+
+// WithProcessOwner adds an attribute with the username of the user that owns the process
+// to the configured Resource.
+func WithProcessOwner() Option {
+	return WithDetectors(processOwnerDetector{})
+}
+
+// WithProcessRuntimeName adds an attribute with the name of the runtime of this
+// process to the configured Resource.
+func WithProcessRuntimeName() Option {
+	return WithDetectors(processRuntimeNameDetector{})
+}
+
+// WithProcessRuntimeVersion adds an attribute with the version of the runtime of
+// this process to the configured Resource.
+func WithProcessRuntimeVersion() Option {
+	return WithDetectors(processRuntimeVersionDetector{})
+}
+
+// WithProcessRuntimeDescription adds an attribute with an additional description
+// about the runtime of the process to the configured Resource.
+func WithProcessRuntimeDescription() Option {
+	return WithDetectors(processRuntimeDescriptionDetector{})
+}
+
+// WithContainer adds all the Container attributes to the configured Resource.
+// See individual WithContainer* functions to configure specific attributes.
+func WithContainer() Option {
+	return WithDetectors(
+		cgroupContainerIDDetector{},
+	)
+}
+
+// WithContainerID adds an attribute with the id of the container to the configured Resource.
+// Note: WithContainerID will not extract the correct container ID in an ECS environment.
+// Please use the ECS resource detector instead (https://pkg.go.dev/go.opentelemetry.io/contrib/detectors/aws/ecs).
+func WithContainerID() Option {
+	return WithDetectors(cgroupContainerIDDetector{})
+}

vendor/go.opentelemetry.io/otel/sdk/resource/container.go

@@ -0,0 +1,100 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"bufio"
+	"context"
+	"errors"
+	"io"
+	"os"
+	"regexp"
+
+	semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
+)
+
+type containerIDProvider func() (string, error)
+
+var (
+	containerID         containerIDProvider = getContainerIDFromCGroup
+	cgroupContainerIDRe                     = regexp.MustCompile(`^.*/(?:.*-)?([0-9a-f]+)(?:\.|\s*$)`)
+)
+
+type cgroupContainerIDDetector struct{}
+
+const cgroupPath = "/proc/self/cgroup"
+
+// Detect returns a *Resource that describes the id of the container.
+// If no container id found, an empty resource will be returned.
+func (cgroupContainerIDDetector) Detect(ctx context.Context) (*Resource, error) {
+	containerID, err := containerID()
+	if err != nil {
+		return nil, err
+	}
+
+	if containerID == "" {
+		return Empty(), nil
+	}
+	return NewWithAttributes(semconv.SchemaURL, semconv.ContainerID(containerID)), nil
+}
+
+var (
+	defaultOSStat = os.Stat
+	osStat        = defaultOSStat
+
+	defaultOSOpen = func(name string) (io.ReadCloser, error) {
+		return os.Open(name)
+	}
+	osOpen = defaultOSOpen
+)
+
+// getContainerIDFromCGroup returns the id of the container from the cgroup file.
+// If no container id found, an empty string will be returned.
+func getContainerIDFromCGroup() (string, error) {
+	if _, err := osStat(cgroupPath); errors.Is(err, os.ErrNotExist) {
+		// File does not exist, skip
+		return "", nil
+	}
+
+	file, err := osOpen(cgroupPath)
+	if err != nil {
+		return "", err
+	}
+	defer file.Close()
+
+	return getContainerIDFromReader(file), nil
+}
+
+// getContainerIDFromReader returns the id of the container from reader.
+func getContainerIDFromReader(reader io.Reader) string {
+	scanner := bufio.NewScanner(reader)
+	for scanner.Scan() {
+		line := scanner.Text()
+
+		if id := getContainerIDFromLine(line); id != "" {
+			return id
+		}
+	}
+	return ""
+}
+
+// getContainerIDFromLine returns the id of the container from one string line.
+func getContainerIDFromLine(line string) string {
+	matches := cgroupContainerIDRe.FindStringSubmatch(line)
+	if len(matches) <= 1 {
+		return ""
+	}
+	return matches[1]
+}

vendor/go.opentelemetry.io/otel/sdk/resource/doc.go

@@ -0,0 +1,31 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package resource provides detecting and representing resources.
+//
+// The fundamental struct is a Resource which holds identifying information
+// about the entities for which telemetry is exported.
+//
+// To automatically construct Resources from an environment a Detector
+// interface is defined. Implementations of this interface can be passed to
+// the Detect function to generate a Resource from the merged information.
+//
+// To load a user defined Resource from the environment variable
+// OTEL_RESOURCE_ATTRIBUTES the FromEnv Detector can be used. It will interpret
+// the value as a list of comma delimited key/value pairs
+// (e.g. `<key1>=<value1>,<key2>=<value2>,...`).
+//
+// While this package provides a stable API,
+// the attributes added by resource detectors may change.
+package resource // import "go.opentelemetry.io/otel/sdk/resource"

vendor/go.opentelemetry.io/otel/sdk/resource/env.go

@@ -0,0 +1,108 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+	"strings"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+	semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
+)
+
+const (
+	// resourceAttrKey is the environment variable name OpenTelemetry Resource information will be read from.
+	resourceAttrKey = "OTEL_RESOURCE_ATTRIBUTES"
+
+	// svcNameKey is the environment variable name that Service Name information will be read from.
+	svcNameKey = "OTEL_SERVICE_NAME"
+)
+
+var (
+	// errMissingValue is returned when a resource value is missing.
+	errMissingValue = fmt.Errorf("%w: missing value", ErrPartialResource)
+)
+
+// fromEnv is a Detector that implements the Detector and collects
+// resources from environment.  This Detector is included as a
+// builtin.
+type fromEnv struct{}
+
+// compile time assertion that FromEnv implements Detector interface.
+var _ Detector = fromEnv{}
+
+// Detect collects resources from environment.
+func (fromEnv) Detect(context.Context) (*Resource, error) {
+	attrs := strings.TrimSpace(os.Getenv(resourceAttrKey))
+	svcName := strings.TrimSpace(os.Getenv(svcNameKey))
+
+	if attrs == "" && svcName == "" {
+		return Empty(), nil
+	}
+
+	var res *Resource
+
+	if svcName != "" {
+		res = NewSchemaless(semconv.ServiceName(svcName))
+	}
+
+	r2, err := constructOTResources(attrs)
+
+	// Ensure that the resource with the service name from OTEL_SERVICE_NAME
+	// takes precedence, if it was defined.
+	res, err2 := Merge(r2, res)
+
+	if err == nil {
+		err = err2
+	} else if err2 != nil {
+		err = fmt.Errorf("detecting resources: %s", []string{err.Error(), err2.Error()})
+	}
+
+	return res, err
+}
+
+func constructOTResources(s string) (*Resource, error) {
+	if s == "" {
+		return Empty(), nil
+	}
+	pairs := strings.Split(s, ",")
+	var attrs []attribute.KeyValue
+	var invalid []string
+	for _, p := range pairs {
+		k, v, found := strings.Cut(p, "=")
+		if !found {
+			invalid = append(invalid, p)
+			continue
+		}
+		key := strings.TrimSpace(k)
+		val, err := url.QueryUnescape(strings.TrimSpace(v))
+		if err != nil {
+			// Retain original value if decoding fails, otherwise it will be
+			// an empty string.
+			val = v
+			otel.Handle(err)
+		}
+		attrs = append(attrs, attribute.String(key, val))
+	}
+	var err error
+	if len(invalid) > 0 {
+		err = fmt.Errorf("%w: %v", errMissingValue, invalid)
+	}
+	return NewSchemaless(attrs...), err
+}

vendor/go.opentelemetry.io/otel/sdk/resource/host_id.go

@@ -0,0 +1,120 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"errors"
+	"strings"
+
+	semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
+)
+
+type hostIDProvider func() (string, error)
+
+var defaultHostIDProvider hostIDProvider = platformHostIDReader.read
+
+var hostID = defaultHostIDProvider
+
+type hostIDReader interface {
+	read() (string, error)
+}
+
+type fileReader func(string) (string, error)
+
+type commandExecutor func(string, ...string) (string, error)
+
+// hostIDReaderBSD implements hostIDReader.
+type hostIDReaderBSD struct {
+	execCommand commandExecutor
+	readFile    fileReader
+}
+
+// read attempts to read the machine-id from /etc/hostid. If not found it will
+// execute `kenv -q smbios.system.uuid`. If neither location yields an id an
+// error will be returned.
+func (r *hostIDReaderBSD) read() (string, error) {
+	if result, err := r.readFile("/etc/hostid"); err == nil {
+		return strings.TrimSpace(result), nil
+	}
+
+	if result, err := r.execCommand("kenv", "-q", "smbios.system.uuid"); err == nil {
+		return strings.TrimSpace(result), nil
+	}
+
+	return "", errors.New("host id not found in: /etc/hostid or kenv")
+}
+
+// hostIDReaderDarwin implements hostIDReader.
+type hostIDReaderDarwin struct {
+	execCommand commandExecutor
+}
+
+// read executes `ioreg -rd1 -c "IOPlatformExpertDevice"` and parses host id
+// from the IOPlatformUUID line. If the command fails or the uuid cannot be
+// parsed an error will be returned.
+func (r *hostIDReaderDarwin) read() (string, error) {
+	result, err := r.execCommand("ioreg", "-rd1", "-c", "IOPlatformExpertDevice")
+	if err != nil {
+		return "", err
+	}
+
+	lines := strings.Split(result, "\n")
+	for _, line := range lines {
+		if strings.Contains(line, "IOPlatformUUID") {
+			parts := strings.Split(line, " = ")
+			if len(parts) == 2 {
+				return strings.Trim(parts[1], "\""), nil
+			}
+			break
+		}
+	}
+
+	return "", errors.New("could not parse IOPlatformUUID")
+}
+
+type hostIDReaderLinux struct {
+	readFile fileReader
+}
+
+// read attempts to read the machine-id from /etc/machine-id followed by
+// /var/lib/dbus/machine-id. If neither location yields an ID an error will
+// be returned.
+func (r *hostIDReaderLinux) read() (string, error) {
+	if result, err := r.readFile("/etc/machine-id"); err == nil {
+		return strings.TrimSpace(result), nil
+	}
+
+	if result, err := r.readFile("/var/lib/dbus/machine-id"); err == nil {
+		return strings.TrimSpace(result), nil
+	}
+
+	return "", errors.New("host id not found in: /etc/machine-id or /var/lib/dbus/machine-id")
+}
+
+type hostIDDetector struct{}
+
+// Detect returns a *Resource containing the platform specific host id.
+func (hostIDDetector) Detect(ctx context.Context) (*Resource, error) {
+	hostID, err := hostID()
+	if err != nil {
+		return nil, err
+	}
+
+	return NewWithAttributes(
+		semconv.SchemaURL,
+		semconv.HostID(hostID),
+	), nil
+}

vendor/go.opentelemetry.io/otel/sdk/resource/host_id_bsd.go

@@ -0,0 +1,23 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build dragonfly || freebsd || netbsd || openbsd || solaris
+// +build dragonfly freebsd netbsd openbsd solaris
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+var platformHostIDReader hostIDReader = &hostIDReaderBSD{
+	execCommand: execCommand,
+	readFile:    readFile,
+}

vendor/go.opentelemetry.io/otel/sdk/resource/host_id_darwin.go

@@ -0,0 +1,19 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+var platformHostIDReader hostIDReader = &hostIDReaderDarwin{
+	execCommand: execCommand,
+}

vendor/go.opentelemetry.io/otel/sdk/resource/host_id_exec.go

@@ -0,0 +1,29 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build darwin || dragonfly || freebsd || netbsd || openbsd || solaris
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import "os/exec"
+
+func execCommand(name string, arg ...string) (string, error) {
+	cmd := exec.Command(name, arg...)
+	b, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+
+	return string(b), nil
+}

vendor/go.opentelemetry.io/otel/sdk/resource/host_id_linux.go

@@ -0,0 +1,22 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build linux
+// +build linux
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+var platformHostIDReader hostIDReader = &hostIDReaderLinux{
+	readFile: readFile,
+}

vendor/go.opentelemetry.io/otel/sdk/resource/host_id_readfile.go

@@ -0,0 +1,28 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build linux || dragonfly || freebsd || netbsd || openbsd || solaris
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import "os"
+
+func readFile(filename string) (string, error) {
+	b, err := os.ReadFile(filename)
+	if err != nil {
+		return "", err
+	}
+
+	return string(b), nil
+}

vendor/go.opentelemetry.io/otel/sdk/resource/host_id_unsupported.go

@@ -0,0 +1,36 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !darwin
+// +build !dragonfly
+// +build !freebsd
+// +build !linux
+// +build !netbsd
+// +build !openbsd
+// +build !solaris
+// +build !windows
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+// hostIDReaderUnsupported is a placeholder implementation for operating systems
+// for which this project currently doesn't support host.id
+// attribute detection. See build tags declaration early on this file
+// for a list of unsupported OSes.
+type hostIDReaderUnsupported struct{}
+
+func (*hostIDReaderUnsupported) read() (string, error) {
+	return "<unknown>", nil
+}
+
+var platformHostIDReader hostIDReader = &hostIDReaderUnsupported{}

vendor/go.opentelemetry.io/otel/sdk/resource/host_id_windows.go

@@ -0,0 +1,48 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build windows
+// +build windows
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"golang.org/x/sys/windows/registry"
+)
+
+// implements hostIDReader
+type hostIDReaderWindows struct{}
+
+// read reads MachineGuid from the windows registry key:
+// SOFTWARE\Microsoft\Cryptography
+func (*hostIDReaderWindows) read() (string, error) {
+	k, err := registry.OpenKey(
+		registry.LOCAL_MACHINE, `SOFTWARE\Microsoft\Cryptography`,
+		registry.QUERY_VALUE|registry.WOW64_64KEY,
+	)
+
+	if err != nil {
+		return "", err
+	}
+	defer k.Close()
+
+	guid, _, err := k.GetStringValue("MachineGuid")
+	if err != nil {
+		return "", err
+	}
+
+	return guid, nil
+}
+
+var platformHostIDReader hostIDReader = &hostIDReaderWindows{}

vendor/go.opentelemetry.io/otel/sdk/resource/os.go

@@ -0,0 +1,99 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"strings"
+
+	"go.opentelemetry.io/otel/attribute"
+	semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
+)
+
+type osDescriptionProvider func() (string, error)
+
+var defaultOSDescriptionProvider osDescriptionProvider = platformOSDescription
+
+var osDescription = defaultOSDescriptionProvider
+
+func setDefaultOSDescriptionProvider() {
+	setOSDescriptionProvider(defaultOSDescriptionProvider)
+}
+
+func setOSDescriptionProvider(osDescriptionProvider osDescriptionProvider) {
+	osDescription = osDescriptionProvider
+}
+
+type osTypeDetector struct{}
+type osDescriptionDetector struct{}
+
+// Detect returns a *Resource that describes the operating system type the
+// service is running on.
+func (osTypeDetector) Detect(ctx context.Context) (*Resource, error) {
+	osType := runtimeOS()
+
+	osTypeAttribute := mapRuntimeOSToSemconvOSType(osType)
+
+	return NewWithAttributes(
+		semconv.SchemaURL,
+		osTypeAttribute,
+	), nil
+}
+
+// Detect returns a *Resource that describes the operating system the
+// service is running on.
+func (osDescriptionDetector) Detect(ctx context.Context) (*Resource, error) {
+	description, err := osDescription()
+
+	if err != nil {
+		return nil, err
+	}
+
+	return NewWithAttributes(
+		semconv.SchemaURL,
+		semconv.OSDescription(description),
+	), nil
+}
+
+// mapRuntimeOSToSemconvOSType translates the OS name as provided by the Go runtime
+// into an OS type attribute with the corresponding value defined by the semantic
+// conventions. In case the provided OS name isn't mapped, it's transformed to lowercase
+// and used as the value for the returned OS type attribute.
+func mapRuntimeOSToSemconvOSType(osType string) attribute.KeyValue {
+	// the elements in this map are the intersection between
+	// available GOOS values and defined semconv OS types
+	osTypeAttributeMap := map[string]attribute.KeyValue{
+		"aix":       semconv.OSTypeAIX,
+		"darwin":    semconv.OSTypeDarwin,
+		"dragonfly": semconv.OSTypeDragonflyBSD,
+		"freebsd":   semconv.OSTypeFreeBSD,
+		"linux":     semconv.OSTypeLinux,
+		"netbsd":    semconv.OSTypeNetBSD,
+		"openbsd":   semconv.OSTypeOpenBSD,
+		"solaris":   semconv.OSTypeSolaris,
+		"windows":   semconv.OSTypeWindows,
+		"zos":       semconv.OSTypeZOS,
+	}
+
+	var osTypeAttribute attribute.KeyValue
+
+	if attr, ok := osTypeAttributeMap[osType]; ok {
+		osTypeAttribute = attr
+	} else {
+		osTypeAttribute = semconv.OSTypeKey.String(strings.ToLower(osType))
+	}
+
+	return osTypeAttribute
+}

vendor/go.opentelemetry.io/otel/sdk/resource/os_release_darwin.go

@@ -0,0 +1,102 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"encoding/xml"
+	"fmt"
+	"io"
+	"os"
+)
+
+type plist struct {
+	XMLName xml.Name `xml:"plist"`
+	Dict    dict     `xml:"dict"`
+}
+
+type dict struct {
+	Key    []string `xml:"key"`
+	String []string `xml:"string"`
+}
+
+// osRelease builds a string describing the operating system release based on the
+// contents of the property list (.plist) system files. If no .plist files are found,
+// or if the required properties to build the release description string are missing,
+// an empty string is returned instead. The generated string resembles the output of
+// the `sw_vers` commandline program, but in a single-line string. For more information
+// about the `sw_vers` program, see: https://www.unix.com/man-page/osx/1/SW_VERS.
+func osRelease() string {
+	file, err := getPlistFile()
+	if err != nil {
+		return ""
+	}
+
+	defer file.Close()
+
+	values, err := parsePlistFile(file)
+	if err != nil {
+		return ""
+	}
+
+	return buildOSRelease(values)
+}
+
+// getPlistFile returns a *os.File pointing to one of the well-known .plist files
+// available on macOS. If no file can be opened, it returns an error.
+func getPlistFile() (*os.File, error) {
+	return getFirstAvailableFile([]string{
+		"/System/Library/CoreServices/SystemVersion.plist",
+		"/System/Library/CoreServices/ServerVersion.plist",
+	})
+}
+
+// parsePlistFile process the file pointed by `file` as a .plist file and returns
+// a map with the key-values for each pair of correlated <key> and <string> elements
+// contained in it.
+func parsePlistFile(file io.Reader) (map[string]string, error) {
+	var v plist
+
+	err := xml.NewDecoder(file).Decode(&v)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(v.Dict.Key) != len(v.Dict.String) {
+		return nil, fmt.Errorf("the number of <key> and <string> elements doesn't match")
+	}
+
+	properties := make(map[string]string, len(v.Dict.Key))
+	for i, key := range v.Dict.Key {
+		properties[key] = v.Dict.String[i]
+	}
+
+	return properties, nil
+}
+
+// buildOSRelease builds a string describing the OS release based on the properties
+// available on the provided map. It tries to find the `ProductName`, `ProductVersion`
+// and `ProductBuildVersion` properties. If some of these properties are not found,
+// it returns an empty string.
+func buildOSRelease(properties map[string]string) string {
+	productName := properties["ProductName"]
+	productVersion := properties["ProductVersion"]
+	productBuildVersion := properties["ProductBuildVersion"]
+
+	if productName == "" || productVersion == "" || productBuildVersion == "" {
+		return ""
+	}
+
+	return fmt.Sprintf("%s %s (%s)", productName, productVersion, productBuildVersion)
+}

vendor/go.opentelemetry.io/otel/sdk/resource/os_release_unix.go

@@ -0,0 +1,154 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build aix || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
+// +build aix dragonfly freebsd linux netbsd openbsd solaris zos
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// osRelease builds a string describing the operating system release based on the
+// properties of the os-release file. If no os-release file is found, or if the
+// required properties to build the release description string are missing, an empty
+// string is returned instead. For more information about os-release files, see:
+// https://www.freedesktop.org/software/systemd/man/os-release.html
+func osRelease() string {
+	file, err := getOSReleaseFile()
+	if err != nil {
+		return ""
+	}
+
+	defer file.Close()
+
+	values := parseOSReleaseFile(file)
+
+	return buildOSRelease(values)
+}
+
+// getOSReleaseFile returns a *os.File pointing to one of the well-known os-release
+// files, according to their order of preference. If no file can be opened, it
+// returns an error.
+func getOSReleaseFile() (*os.File, error) {
+	return getFirstAvailableFile([]string{"/etc/os-release", "/usr/lib/os-release"})
+}
+
+// parseOSReleaseFile process the file pointed by `file` as an os-release file and
+// returns a map with the key-values contained in it. Empty lines or lines starting
+// with a '#' character are ignored, as well as lines with the missing key=value
+// separator. Values are unquoted and unescaped.
+func parseOSReleaseFile(file io.Reader) map[string]string {
+	values := make(map[string]string)
+	scanner := bufio.NewScanner(file)
+
+	for scanner.Scan() {
+		line := scanner.Text()
+
+		if skip(line) {
+			continue
+		}
+
+		key, value, ok := parse(line)
+		if ok {
+			values[key] = value
+		}
+	}
+
+	return values
+}
+
+// skip returns true if the line is blank or starts with a '#' character, and
+// therefore should be skipped from processing.
+func skip(line string) bool {
+	line = strings.TrimSpace(line)
+
+	return len(line) == 0 || strings.HasPrefix(line, "#")
+}
+
+// parse attempts to split the provided line on the first '=' character, and then
+// sanitize each side of the split before returning them as a key-value pair.
+func parse(line string) (string, string, bool) {
+	k, v, found := strings.Cut(line, "=")
+
+	if !found || len(k) == 0 {
+		return "", "", false
+	}
+
+	key := strings.TrimSpace(k)
+	value := unescape(unquote(strings.TrimSpace(v)))
+
+	return key, value, true
+}
+
+// unquote checks whether the string `s` is quoted with double or single quotes
+// and, if so, returns a version of the string without them. Otherwise it returns
+// the provided string unchanged.
+func unquote(s string) string {
+	if len(s) < 2 {
+		return s
+	}
+
+	if (s[0] == '"' || s[0] == '\'') && s[0] == s[len(s)-1] {
+		return s[1 : len(s)-1]
+	}
+
+	return s
+}
+
+// unescape removes the `\` prefix from some characters that are expected
+// to have it added in front of them for escaping purposes.
+func unescape(s string) string {
+	return strings.NewReplacer(
+		`\$`, `$`,
+		`\"`, `"`,
+		`\'`, `'`,
+		`\\`, `\`,
+		"\\`", "`",
+	).Replace(s)
+}
+
+// buildOSRelease builds a string describing the OS release based on the properties
+// available on the provided map. It favors a combination of the `NAME` and `VERSION`
+// properties as first option (falling back to `VERSION_ID` if `VERSION` isn't
+// found), and using `PRETTY_NAME` alone if some of the previous are not present. If
+// none of these properties are found, it returns an empty string.
+//
+// The rationale behind not using `PRETTY_NAME` as first choice was that, for some
+// Linux distributions, it doesn't include the same detail that can be found on the
+// individual `NAME` and `VERSION` properties, and combining `PRETTY_NAME` with
+// other properties can produce "pretty" redundant strings in some cases.
+func buildOSRelease(values map[string]string) string {
+	var osRelease string
+
+	name := values["NAME"]
+	version := values["VERSION"]
+
+	if version == "" {
+		version = values["VERSION_ID"]
+	}
+
+	if name != "" && version != "" {
+		osRelease = fmt.Sprintf("%s %s", name, version)
+	} else {
+		osRelease = values["PRETTY_NAME"]
+	}
+
+	return osRelease
+}

vendor/go.opentelemetry.io/otel/sdk/resource/os_unix.go

@@ -0,0 +1,90 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"fmt"
+	"os"
+
+	"golang.org/x/sys/unix"
+)
+
+type unameProvider func(buf *unix.Utsname) (err error)
+
+var defaultUnameProvider unameProvider = unix.Uname
+
+var currentUnameProvider = defaultUnameProvider
+
+func setDefaultUnameProvider() {
+	setUnameProvider(defaultUnameProvider)
+}
+
+func setUnameProvider(unameProvider unameProvider) {
+	currentUnameProvider = unameProvider
+}
+
+// platformOSDescription returns a human readable OS version information string.
+// The final string combines OS release information (where available) and the
+// result of the `uname` system call.
+func platformOSDescription() (string, error) {
+	uname, err := uname()
+	if err != nil {
+		return "", err
+	}
+
+	osRelease := osRelease()
+	if osRelease != "" {
+		return fmt.Sprintf("%s (%s)", osRelease, uname), nil
+	}
+
+	return uname, nil
+}
+
+// uname issues a uname(2) system call (or equivalent on systems which doesn't
+// have one) and formats the output in a single string, similar to the output
+// of the `uname` commandline program. The final string resembles the one
+// obtained with a call to `uname -snrvm`.
+func uname() (string, error) {
+	var utsName unix.Utsname
+
+	err := currentUnameProvider(&utsName)
+	if err != nil {
+		return "", err
+	}
+
+	return fmt.Sprintf("%s %s %s %s %s",
+		unix.ByteSliceToString(utsName.Sysname[:]),
+		unix.ByteSliceToString(utsName.Nodename[:]),
+		unix.ByteSliceToString(utsName.Release[:]),
+		unix.ByteSliceToString(utsName.Version[:]),
+		unix.ByteSliceToString(utsName.Machine[:]),
+	), nil
+}
+
+// getFirstAvailableFile returns an *os.File of the first available
+// file from a list of candidate file paths.
+func getFirstAvailableFile(candidates []string) (*os.File, error) {
+	for _, c := range candidates {
+		file, err := os.Open(c)
+		if err == nil {
+			return file, nil
+		}
+	}
+
+	return nil, fmt.Errorf("no candidate file available: %v", candidates)
+}

vendor/go.opentelemetry.io/otel/sdk/resource/os_unsupported.go

@@ -0,0 +1,34 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !aix
+// +build !darwin
+// +build !dragonfly
+// +build !freebsd
+// +build !linux
+// +build !netbsd
+// +build !openbsd
+// +build !solaris
+// +build !windows
+// +build !zos
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+// platformOSDescription is a placeholder implementation for OSes
+// for which this project currently doesn't support os.description
+// attribute detection. See build tags declaration early on this file
+// for a list of unsupported OSes.
+func platformOSDescription() (string, error) {
+	return "<unknown>", nil
+}

vendor/go.opentelemetry.io/otel/sdk/resource/os_windows.go

@@ -0,0 +1,101 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"fmt"
+	"strconv"
+
+	"golang.org/x/sys/windows/registry"
+)
+
+// platformOSDescription returns a human readable OS version information string.
+// It does so by querying registry values under the
+// `SOFTWARE\Microsoft\Windows NT\CurrentVersion` key. The final string
+// resembles the one displayed by the Version Reporter Applet (winver.exe).
+func platformOSDescription() (string, error) {
+	k, err := registry.OpenKey(
+		registry.LOCAL_MACHINE, `SOFTWARE\Microsoft\Windows NT\CurrentVersion`, registry.QUERY_VALUE)
+
+	if err != nil {
+		return "", err
+	}
+
+	defer k.Close()
+
+	var (
+		productName               = readProductName(k)
+		displayVersion            = readDisplayVersion(k)
+		releaseID                 = readReleaseID(k)
+		currentMajorVersionNumber = readCurrentMajorVersionNumber(k)
+		currentMinorVersionNumber = readCurrentMinorVersionNumber(k)
+		currentBuildNumber        = readCurrentBuildNumber(k)
+		ubr                       = readUBR(k)
+	)
+
+	if displayVersion != "" {
+		displayVersion += " "
+	}
+
+	return fmt.Sprintf("%s %s(%s) [Version %s.%s.%s.%s]",
+		productName,
+		displayVersion,
+		releaseID,
+		currentMajorVersionNumber,
+		currentMinorVersionNumber,
+		currentBuildNumber,
+		ubr,
+	), nil
+}
+
+func getStringValue(name string, k registry.Key) string {
+	value, _, _ := k.GetStringValue(name)
+
+	return value
+}
+
+func getIntegerValue(name string, k registry.Key) uint64 {
+	value, _, _ := k.GetIntegerValue(name)
+
+	return value
+}
+
+func readProductName(k registry.Key) string {
+	return getStringValue("ProductName", k)
+}
+
+func readDisplayVersion(k registry.Key) string {
+	return getStringValue("DisplayVersion", k)
+}
+
+func readReleaseID(k registry.Key) string {
+	return getStringValue("ReleaseID", k)
+}
+
+func readCurrentMajorVersionNumber(k registry.Key) string {
+	return strconv.FormatUint(getIntegerValue("CurrentMajorVersionNumber", k), 10)
+}
+
+func readCurrentMinorVersionNumber(k registry.Key) string {
+	return strconv.FormatUint(getIntegerValue("CurrentMinorVersionNumber", k), 10)
+}
+
+func readCurrentBuildNumber(k registry.Key) string {
+	return getStringValue("CurrentBuildNumber", k)
+}
+
+func readUBR(k registry.Key) string {
+	return strconv.FormatUint(getIntegerValue("UBR", k), 10)
+}

vendor/go.opentelemetry.io/otel/sdk/resource/process.go

@@ -0,0 +1,180 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/user"
+	"path/filepath"
+	"runtime"
+
+	semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
+)
+
+type pidProvider func() int
+type executablePathProvider func() (string, error)
+type commandArgsProvider func() []string
+type ownerProvider func() (*user.User, error)
+type runtimeNameProvider func() string
+type runtimeVersionProvider func() string
+type runtimeOSProvider func() string
+type runtimeArchProvider func() string
+
+var (
+	defaultPidProvider            pidProvider            = os.Getpid
+	defaultExecutablePathProvider executablePathProvider = os.Executable
+	defaultCommandArgsProvider    commandArgsProvider    = func() []string { return os.Args }
+	defaultOwnerProvider          ownerProvider          = user.Current
+	defaultRuntimeNameProvider    runtimeNameProvider    = func() string {
+		if runtime.Compiler == "gc" {
+			return "go"
+		}
+		return runtime.Compiler
+	}
+	defaultRuntimeVersionProvider runtimeVersionProvider = runtime.Version
+	defaultRuntimeOSProvider      runtimeOSProvider      = func() string { return runtime.GOOS }
+	defaultRuntimeArchProvider    runtimeArchProvider    = func() string { return runtime.GOARCH }
+)
+
+var (
+	pid            = defaultPidProvider
+	executablePath = defaultExecutablePathProvider
+	commandArgs    = defaultCommandArgsProvider
+	owner          = defaultOwnerProvider
+	runtimeName    = defaultRuntimeNameProvider
+	runtimeVersion = defaultRuntimeVersionProvider
+	runtimeOS      = defaultRuntimeOSProvider
+	runtimeArch    = defaultRuntimeArchProvider
+)
+
+func setDefaultOSProviders() {
+	setOSProviders(
+		defaultPidProvider,
+		defaultExecutablePathProvider,
+		defaultCommandArgsProvider,
+	)
+}
+
+func setOSProviders(
+	pidProvider pidProvider,
+	executablePathProvider executablePathProvider,
+	commandArgsProvider commandArgsProvider,
+) {
+	pid = pidProvider
+	executablePath = executablePathProvider
+	commandArgs = commandArgsProvider
+}
+
+func setDefaultRuntimeProviders() {
+	setRuntimeProviders(
+		defaultRuntimeNameProvider,
+		defaultRuntimeVersionProvider,
+		defaultRuntimeOSProvider,
+		defaultRuntimeArchProvider,
+	)
+}
+
+func setRuntimeProviders(
+	runtimeNameProvider runtimeNameProvider,
+	runtimeVersionProvider runtimeVersionProvider,
+	runtimeOSProvider runtimeOSProvider,
+	runtimeArchProvider runtimeArchProvider,
+) {
+	runtimeName = runtimeNameProvider
+	runtimeVersion = runtimeVersionProvider
+	runtimeOS = runtimeOSProvider
+	runtimeArch = runtimeArchProvider
+}
+
+func setDefaultUserProviders() {
+	setUserProviders(defaultOwnerProvider)
+}
+
+func setUserProviders(ownerProvider ownerProvider) {
+	owner = ownerProvider
+}
+
+type processPIDDetector struct{}
+type processExecutableNameDetector struct{}
+type processExecutablePathDetector struct{}
+type processCommandArgsDetector struct{}
+type processOwnerDetector struct{}
+type processRuntimeNameDetector struct{}
+type processRuntimeVersionDetector struct{}
+type processRuntimeDescriptionDetector struct{}
+
+// Detect returns a *Resource that describes the process identifier (PID) of the
+// executing process.
+func (processPIDDetector) Detect(ctx context.Context) (*Resource, error) {
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessPID(pid())), nil
+}
+
+// Detect returns a *Resource that describes the name of the process executable.
+func (processExecutableNameDetector) Detect(ctx context.Context) (*Resource, error) {
+	executableName := filepath.Base(commandArgs()[0])
+
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessExecutableName(executableName)), nil
+}
+
+// Detect returns a *Resource that describes the full path of the process executable.
+func (processExecutablePathDetector) Detect(ctx context.Context) (*Resource, error) {
+	executablePath, err := executablePath()
+	if err != nil {
+		return nil, err
+	}
+
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessExecutablePath(executablePath)), nil
+}
+
+// Detect returns a *Resource that describes all the command arguments as received
+// by the process.
+func (processCommandArgsDetector) Detect(ctx context.Context) (*Resource, error) {
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessCommandArgs(commandArgs()...)), nil
+}
+
+// Detect returns a *Resource that describes the username of the user that owns the
+// process.
+func (processOwnerDetector) Detect(ctx context.Context) (*Resource, error) {
+	owner, err := owner()
+	if err != nil {
+		return nil, err
+	}
+
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessOwner(owner.Username)), nil
+}
+
+// Detect returns a *Resource that describes the name of the compiler used to compile
+// this process image.
+func (processRuntimeNameDetector) Detect(ctx context.Context) (*Resource, error) {
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessRuntimeName(runtimeName())), nil
+}
+
+// Detect returns a *Resource that describes the version of the runtime of this process.
+func (processRuntimeVersionDetector) Detect(ctx context.Context) (*Resource, error) {
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessRuntimeVersion(runtimeVersion())), nil
+}
+
+// Detect returns a *Resource that describes the runtime of this process.
+func (processRuntimeDescriptionDetector) Detect(ctx context.Context) (*Resource, error) {
+	runtimeDescription := fmt.Sprintf(
+		"go version %s %s/%s", runtimeVersion(), runtimeOS(), runtimeArch())
+
+	return NewWithAttributes(
+		semconv.SchemaURL,
+		semconv.ProcessRuntimeDescription(runtimeDescription),
+	), nil
+}

vendor/go.opentelemetry.io/otel/sdk/resource/resource.go

@@ -0,0 +1,271 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"errors"
+	"sync"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+)
+
+// Resource describes an entity about which identifying information
+// and metadata is exposed.  Resource is an immutable object,
+// equivalent to a map from key to unique value.
+//
+// Resources should be passed and stored as pointers
+// (`*resource.Resource`).  The `nil` value is equivalent to an empty
+// Resource.
+type Resource struct {
+	attrs     attribute.Set
+	schemaURL string
+}
+
+var (
+	defaultResource     *Resource
+	defaultResourceOnce sync.Once
+)
+
+var errMergeConflictSchemaURL = errors.New("cannot merge resource due to conflicting Schema URL")
+
+// New returns a Resource combined from the user-provided detectors.
+func New(ctx context.Context, opts ...Option) (*Resource, error) {
+	cfg := config{}
+	for _, opt := range opts {
+		cfg = opt.apply(cfg)
+	}
+
+	r := &Resource{schemaURL: cfg.schemaURL}
+	return r, detect(ctx, r, cfg.detectors)
+}
+
+// NewWithAttributes creates a resource from attrs and associates the resource with a
+// schema URL. If attrs contains duplicate keys, the last value will be used. If attrs
+// contains any invalid items those items will be dropped. The attrs are assumed to be
+// in a schema identified by schemaURL.
+func NewWithAttributes(schemaURL string, attrs ...attribute.KeyValue) *Resource {
+	resource := NewSchemaless(attrs...)
+	resource.schemaURL = schemaURL
+	return resource
+}
+
+// NewSchemaless creates a resource from attrs. If attrs contains duplicate keys,
+// the last value will be used. If attrs contains any invalid items those items will
+// be dropped. The resource will not be associated with a schema URL. If the schema
+// of the attrs is known use NewWithAttributes instead.
+func NewSchemaless(attrs ...attribute.KeyValue) *Resource {
+	if len(attrs) == 0 {
+		return &Resource{}
+	}
+
+	// Ensure attributes comply with the specification:
+	// https://github.com/open-telemetry/opentelemetry-specification/blob/v1.20.0/specification/common/README.md#attribute
+	s, _ := attribute.NewSetWithFiltered(attrs, func(kv attribute.KeyValue) bool {
+		return kv.Valid()
+	})
+
+	// If attrs only contains invalid entries do not allocate a new resource.
+	if s.Len() == 0 {
+		return &Resource{}
+	}
+
+	return &Resource{attrs: s} //nolint
+}
+
+// String implements the Stringer interface and provides a
+// human-readable form of the resource.
+//
+// Avoid using this representation as the key in a map of resources,
+// use Equivalent() as the key instead.
+func (r *Resource) String() string {
+	if r == nil {
+		return ""
+	}
+	return r.attrs.Encoded(attribute.DefaultEncoder())
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent this exporter.
+func (r *Resource) MarshalLog() interface{} {
+	return struct {
+		Attributes attribute.Set
+		SchemaURL  string
+	}{
+		Attributes: r.attrs,
+		SchemaURL:  r.schemaURL,
+	}
+}
+
+// Attributes returns a copy of attributes from the resource in a sorted order.
+// To avoid allocating a new slice, use an iterator.
+func (r *Resource) Attributes() []attribute.KeyValue {
+	if r == nil {
+		r = Empty()
+	}
+	return r.attrs.ToSlice()
+}
+
+// SchemaURL returns the schema URL associated with Resource r.
+func (r *Resource) SchemaURL() string {
+	if r == nil {
+		return ""
+	}
+	return r.schemaURL
+}
+
+// Iter returns an iterator of the Resource attributes.
+// This is ideal to use if you do not want a copy of the attributes.
+func (r *Resource) Iter() attribute.Iterator {
+	if r == nil {
+		r = Empty()
+	}
+	return r.attrs.Iter()
+}
+
+// Equal returns true when a Resource is equivalent to this Resource.
+func (r *Resource) Equal(eq *Resource) bool {
+	if r == nil {
+		r = Empty()
+	}
+	if eq == nil {
+		eq = Empty()
+	}
+	return r.Equivalent() == eq.Equivalent()
+}
+
+// Merge creates a new resource by combining resource a and b.
+//
+// If there are common keys between resource a and b, then the value
+// from resource b will overwrite the value from resource a, even
+// if resource b's value is empty.
+//
+// The SchemaURL of the resources will be merged according to the spec rules:
+// https://github.com/open-telemetry/opentelemetry-specification/blob/v1.20.0/specification/resource/sdk.md#merge
+// If the resources have different non-empty schemaURL an empty resource and an error
+// will be returned.
+func Merge(a, b *Resource) (*Resource, error) {
+	if a == nil && b == nil {
+		return Empty(), nil
+	}
+	if a == nil {
+		return b, nil
+	}
+	if b == nil {
+		return a, nil
+	}
+
+	// Merge the schema URL.
+	var schemaURL string
+	switch true {
+	case a.schemaURL == "":
+		schemaURL = b.schemaURL
+	case b.schemaURL == "":
+		schemaURL = a.schemaURL
+	case a.schemaURL == b.schemaURL:
+		schemaURL = a.schemaURL
+	default:
+		return Empty(), errMergeConflictSchemaURL
+	}
+
+	// Note: 'b' attributes will overwrite 'a' with last-value-wins in attribute.Key()
+	// Meaning this is equivalent to: append(a.Attributes(), b.Attributes()...)
+	mi := attribute.NewMergeIterator(b.Set(), a.Set())
+	combine := make([]attribute.KeyValue, 0, a.Len()+b.Len())
+	for mi.Next() {
+		combine = append(combine, mi.Attribute())
+	}
+	merged := NewWithAttributes(schemaURL, combine...)
+	return merged, nil
+}
+
+// Empty returns an instance of Resource with no attributes. It is
+// equivalent to a `nil` Resource.
+func Empty() *Resource {
+	return &Resource{}
+}
+
+// Default returns an instance of Resource with a default
+// "service.name" and OpenTelemetrySDK attributes.
+func Default() *Resource {
+	defaultResourceOnce.Do(func() {
+		var err error
+		defaultResource, err = Detect(
+			context.Background(),
+			defaultServiceNameDetector{},
+			fromEnv{},
+			telemetrySDK{},
+		)
+		if err != nil {
+			otel.Handle(err)
+		}
+		// If Detect did not return a valid resource, fall back to emptyResource.
+		if defaultResource == nil {
+			defaultResource = &Resource{}
+		}
+	})
+	return defaultResource
+}
+
+// Environment returns an instance of Resource with attributes
+// extracted from the OTEL_RESOURCE_ATTRIBUTES environment variable.
+func Environment() *Resource {
+	detector := &fromEnv{}
+	resource, err := detector.Detect(context.Background())
+	if err != nil {
+		otel.Handle(err)
+	}
+	return resource
+}
+
+// Equivalent returns an object that can be compared for equality
+// between two resources. This value is suitable for use as a key in
+// a map.
+func (r *Resource) Equivalent() attribute.Distinct {
+	return r.Set().Equivalent()
+}
+
+// Set returns the equivalent *attribute.Set of this resource's attributes.
+func (r *Resource) Set() *attribute.Set {
+	if r == nil {
+		r = Empty()
+	}
+	return &r.attrs
+}
+
+// MarshalJSON encodes the resource attributes as a JSON list of { "Key":
+// "...", "Value": ... } pairs in order sorted by key.
+func (r *Resource) MarshalJSON() ([]byte, error) {
+	if r == nil {
+		r = Empty()
+	}
+	return r.attrs.MarshalJSON()
+}
+
+// Len returns the number of unique key-values in this Resource.
+func (r *Resource) Len() int {
+	if r == nil {
+		return 0
+	}
+	return r.attrs.Len()
+}
+
+// Encoded returns an encoded representation of the resource.
+func (r *Resource) Encoded(enc attribute.Encoder) string {
+	if r == nil {
+		return ""
+	}
+	return r.attrs.Encoded(enc)
+}

vendor/go.opentelemetry.io/otel/sdk/trace/batch_span_processor.go

@@ -0,0 +1,420 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/internal/global"
+	"go.opentelemetry.io/otel/sdk/internal/env"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// Defaults for BatchSpanProcessorOptions.
+const (
+	DefaultMaxQueueSize       = 2048
+	DefaultScheduleDelay      = 5000
+	DefaultExportTimeout      = 30000
+	DefaultMaxExportBatchSize = 512
+)
+
+// BatchSpanProcessorOption configures a BatchSpanProcessor.
+type BatchSpanProcessorOption func(o *BatchSpanProcessorOptions)
+
+// BatchSpanProcessorOptions is configuration settings for a
+// BatchSpanProcessor.
+type BatchSpanProcessorOptions struct {
+	// MaxQueueSize is the maximum queue size to buffer spans for delayed processing. If the
+	// queue gets full it drops the spans. Use BlockOnQueueFull to change this behavior.
+	// The default value of MaxQueueSize is 2048.
+	MaxQueueSize int
+
+	// BatchTimeout is the maximum duration for constructing a batch. Processor
+	// forcefully sends available spans when timeout is reached.
+	// The default value of BatchTimeout is 5000 msec.
+	BatchTimeout time.Duration
+
+	// ExportTimeout specifies the maximum duration for exporting spans. If the timeout
+	// is reached, the export will be cancelled.
+	// The default value of ExportTimeout is 30000 msec.
+	ExportTimeout time.Duration
+
+	// MaxExportBatchSize is the maximum number of spans to process in a single batch.
+	// If there are more than one batch worth of spans then it processes multiple batches
+	// of spans one batch after the other without any delay.
+	// The default value of MaxExportBatchSize is 512.
+	MaxExportBatchSize int
+
+	// BlockOnQueueFull blocks onEnd() and onStart() method if the queue is full
+	// AND if BlockOnQueueFull is set to true.
+	// Blocking option should be used carefully as it can severely affect the performance of an
+	// application.
+	BlockOnQueueFull bool
+}
+
+// batchSpanProcessor is a SpanProcessor that batches asynchronously-received
+// spans and sends them to a trace.Exporter when complete.
+type batchSpanProcessor struct {
+	e SpanExporter
+	o BatchSpanProcessorOptions
+
+	queue   chan ReadOnlySpan
+	dropped uint32
+
+	batch      []ReadOnlySpan
+	batchMutex sync.Mutex
+	timer      *time.Timer
+	stopWait   sync.WaitGroup
+	stopOnce   sync.Once
+	stopCh     chan struct{}
+	stopped    atomic.Bool
+}
+
+var _ SpanProcessor = (*batchSpanProcessor)(nil)
+
+// NewBatchSpanProcessor creates a new SpanProcessor that will send completed
+// span batches to the exporter with the supplied options.
+//
+// If the exporter is nil, the span processor will perform no action.
+func NewBatchSpanProcessor(exporter SpanExporter, options ...BatchSpanProcessorOption) SpanProcessor {
+	maxQueueSize := env.BatchSpanProcessorMaxQueueSize(DefaultMaxQueueSize)
+	maxExportBatchSize := env.BatchSpanProcessorMaxExportBatchSize(DefaultMaxExportBatchSize)
+
+	if maxExportBatchSize > maxQueueSize {
+		if DefaultMaxExportBatchSize > maxQueueSize {
+			maxExportBatchSize = maxQueueSize
+		} else {
+			maxExportBatchSize = DefaultMaxExportBatchSize
+		}
+	}
+
+	o := BatchSpanProcessorOptions{
+		BatchTimeout:       time.Duration(env.BatchSpanProcessorScheduleDelay(DefaultScheduleDelay)) * time.Millisecond,
+		ExportTimeout:      time.Duration(env.BatchSpanProcessorExportTimeout(DefaultExportTimeout)) * time.Millisecond,
+		MaxQueueSize:       maxQueueSize,
+		MaxExportBatchSize: maxExportBatchSize,
+	}
+	for _, opt := range options {
+		opt(&o)
+	}
+	bsp := &batchSpanProcessor{
+		e:      exporter,
+		o:      o,
+		batch:  make([]ReadOnlySpan, 0, o.MaxExportBatchSize),
+		timer:  time.NewTimer(o.BatchTimeout),
+		queue:  make(chan ReadOnlySpan, o.MaxQueueSize),
+		stopCh: make(chan struct{}),
+	}
+
+	bsp.stopWait.Add(1)
+	go func() {
+		defer bsp.stopWait.Done()
+		bsp.processQueue()
+		bsp.drainQueue()
+	}()
+
+	return bsp
+}
+
+// OnStart method does nothing.
+func (bsp *batchSpanProcessor) OnStart(parent context.Context, s ReadWriteSpan) {}
+
+// OnEnd method enqueues a ReadOnlySpan for later processing.
+func (bsp *batchSpanProcessor) OnEnd(s ReadOnlySpan) {
+	// Do not enqueue spans after Shutdown.
+	if bsp.stopped.Load() {
+		return
+	}
+
+	// Do not enqueue spans if we are just going to drop them.
+	if bsp.e == nil {
+		return
+	}
+	bsp.enqueue(s)
+}
+
+// Shutdown flushes the queue and waits until all spans are processed.
+// It only executes once. Subsequent call does nothing.
+func (bsp *batchSpanProcessor) Shutdown(ctx context.Context) error {
+	var err error
+	bsp.stopOnce.Do(func() {
+		bsp.stopped.Store(true)
+		wait := make(chan struct{})
+		go func() {
+			close(bsp.stopCh)
+			bsp.stopWait.Wait()
+			if bsp.e != nil {
+				if err := bsp.e.Shutdown(ctx); err != nil {
+					otel.Handle(err)
+				}
+			}
+			close(wait)
+		}()
+		// Wait until the wait group is done or the context is cancelled
+		select {
+		case <-wait:
+		case <-ctx.Done():
+			err = ctx.Err()
+		}
+	})
+	return err
+}
+
+type forceFlushSpan struct {
+	ReadOnlySpan
+	flushed chan struct{}
+}
+
+func (f forceFlushSpan) SpanContext() trace.SpanContext {
+	return trace.NewSpanContext(trace.SpanContextConfig{TraceFlags: trace.FlagsSampled})
+}
+
+// ForceFlush exports all ended spans that have not yet been exported.
+func (bsp *batchSpanProcessor) ForceFlush(ctx context.Context) error {
+	// Interrupt if context is already canceled.
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+
+	// Do nothing after Shutdown.
+	if bsp.stopped.Load() {
+		return nil
+	}
+
+	var err error
+	if bsp.e != nil {
+		flushCh := make(chan struct{})
+		if bsp.enqueueBlockOnQueueFull(ctx, forceFlushSpan{flushed: flushCh}) {
+			select {
+			case <-bsp.stopCh:
+				// The batchSpanProcessor is Shutdown.
+				return nil
+			case <-flushCh:
+				// Processed any items in queue prior to ForceFlush being called
+			case <-ctx.Done():
+				return ctx.Err()
+			}
+		}
+
+		wait := make(chan error)
+		go func() {
+			wait <- bsp.exportSpans(ctx)
+			close(wait)
+		}()
+		// Wait until the export is finished or the context is cancelled/timed out
+		select {
+		case err = <-wait:
+		case <-ctx.Done():
+			err = ctx.Err()
+		}
+	}
+	return err
+}
+
+// WithMaxQueueSize returns a BatchSpanProcessorOption that configures the
+// maximum queue size allowed for a BatchSpanProcessor.
+func WithMaxQueueSize(size int) BatchSpanProcessorOption {
+	return func(o *BatchSpanProcessorOptions) {
+		o.MaxQueueSize = size
+	}
+}
+
+// WithMaxExportBatchSize returns a BatchSpanProcessorOption that configures
+// the maximum export batch size allowed for a BatchSpanProcessor.
+func WithMaxExportBatchSize(size int) BatchSpanProcessorOption {
+	return func(o *BatchSpanProcessorOptions) {
+		o.MaxExportBatchSize = size
+	}
+}
+
+// WithBatchTimeout returns a BatchSpanProcessorOption that configures the
+// maximum delay allowed for a BatchSpanProcessor before it will export any
+// held span (whether the queue is full or not).
+func WithBatchTimeout(delay time.Duration) BatchSpanProcessorOption {
+	return func(o *BatchSpanProcessorOptions) {
+		o.BatchTimeout = delay
+	}
+}
+
+// WithExportTimeout returns a BatchSpanProcessorOption that configures the
+// amount of time a BatchSpanProcessor waits for an exporter to export before
+// abandoning the export.
+func WithExportTimeout(timeout time.Duration) BatchSpanProcessorOption {
+	return func(o *BatchSpanProcessorOptions) {
+		o.ExportTimeout = timeout
+	}
+}
+
+// WithBlocking returns a BatchSpanProcessorOption that configures a
+// BatchSpanProcessor to wait for enqueue operations to succeed instead of
+// dropping data when the queue is full.
+func WithBlocking() BatchSpanProcessorOption {
+	return func(o *BatchSpanProcessorOptions) {
+		o.BlockOnQueueFull = true
+	}
+}
+
+// exportSpans is a subroutine of processing and draining the queue.
+func (bsp *batchSpanProcessor) exportSpans(ctx context.Context) error {
+	bsp.timer.Reset(bsp.o.BatchTimeout)
+
+	bsp.batchMutex.Lock()
+	defer bsp.batchMutex.Unlock()
+
+	if bsp.o.ExportTimeout > 0 {
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, bsp.o.ExportTimeout)
+		defer cancel()
+	}
+
+	if l := len(bsp.batch); l > 0 {
+		global.Debug("exporting spans", "count", len(bsp.batch), "total_dropped", atomic.LoadUint32(&bsp.dropped))
+		err := bsp.e.ExportSpans(ctx, bsp.batch)
+
+		// A new batch is always created after exporting, even if the batch failed to be exported.
+		//
+		// It is up to the exporter to implement any type of retry logic if a batch is failing
+		// to be exported, since it is specific to the protocol and backend being sent to.
+		bsp.batch = bsp.batch[:0]
+
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// processQueue removes spans from the `queue` channel until processor
+// is shut down. It calls the exporter in batches of up to MaxExportBatchSize
+// waiting up to BatchTimeout to form a batch.
+func (bsp *batchSpanProcessor) processQueue() {
+	defer bsp.timer.Stop()
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	for {
+		select {
+		case <-bsp.stopCh:
+			return
+		case <-bsp.timer.C:
+			if err := bsp.exportSpans(ctx); err != nil {
+				otel.Handle(err)
+			}
+		case sd := <-bsp.queue:
+			if ffs, ok := sd.(forceFlushSpan); ok {
+				close(ffs.flushed)
+				continue
+			}
+			bsp.batchMutex.Lock()
+			bsp.batch = append(bsp.batch, sd)
+			shouldExport := len(bsp.batch) >= bsp.o.MaxExportBatchSize
+			bsp.batchMutex.Unlock()
+			if shouldExport {
+				if !bsp.timer.Stop() {
+					<-bsp.timer.C
+				}
+				if err := bsp.exportSpans(ctx); err != nil {
+					otel.Handle(err)
+				}
+			}
+		}
+	}
+}
+
+// drainQueue awaits the any caller that had added to bsp.stopWait
+// to finish the enqueue, then exports the final batch.
+func (bsp *batchSpanProcessor) drainQueue() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	for {
+		select {
+		case sd := <-bsp.queue:
+			if _, ok := sd.(forceFlushSpan); ok {
+				// Ignore flush requests as they are not valid spans.
+				continue
+			}
+
+			bsp.batchMutex.Lock()
+			bsp.batch = append(bsp.batch, sd)
+			shouldExport := len(bsp.batch) == bsp.o.MaxExportBatchSize
+			bsp.batchMutex.Unlock()
+
+			if shouldExport {
+				if err := bsp.exportSpans(ctx); err != nil {
+					otel.Handle(err)
+				}
+			}
+		default:
+			// There are no more enqueued spans. Make final export.
+			if err := bsp.exportSpans(ctx); err != nil {
+				otel.Handle(err)
+			}
+			return
+		}
+	}
+}
+
+func (bsp *batchSpanProcessor) enqueue(sd ReadOnlySpan) {
+	ctx := context.TODO()
+	if bsp.o.BlockOnQueueFull {
+		bsp.enqueueBlockOnQueueFull(ctx, sd)
+	} else {
+		bsp.enqueueDrop(ctx, sd)
+	}
+}
+
+func (bsp *batchSpanProcessor) enqueueBlockOnQueueFull(ctx context.Context, sd ReadOnlySpan) bool {
+	if !sd.SpanContext().IsSampled() {
+		return false
+	}
+
+	select {
+	case bsp.queue <- sd:
+		return true
+	case <-ctx.Done():
+		return false
+	}
+}
+
+func (bsp *batchSpanProcessor) enqueueDrop(ctx context.Context, sd ReadOnlySpan) bool {
+	if !sd.SpanContext().IsSampled() {
+		return false
+	}
+
+	select {
+	case bsp.queue <- sd:
+		return true
+	default:
+		atomic.AddUint32(&bsp.dropped, 1)
+	}
+	return false
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent this exporter.
+func (bsp *batchSpanProcessor) MarshalLog() interface{} {
+	return struct {
+		Type         string
+		SpanExporter SpanExporter
+		Config       BatchSpanProcessorOptions
+	}{
+		Type:         "BatchSpanProcessor",
+		SpanExporter: bsp.e,
+		Config:       bsp.o,
+	}
+}

vendor/go.opentelemetry.io/otel/sdk/trace/doc.go

@@ -0,0 +1,21 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package trace contains support for OpenTelemetry distributed tracing.
+
+The following assumes a basic familiarity with OpenTelemetry concepts.
+See https://opentelemetry.io.
+*/
+package trace // import "go.opentelemetry.io/otel/sdk/trace"

vendor/go.opentelemetry.io/otel/sdk/trace/event.go

@@ -0,0 +1,37 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"time"
+
+	"go.opentelemetry.io/otel/attribute"
+)
+
+// Event is a thing that happened during a Span's lifetime.
+type Event struct {
+	// Name is the name of this event
+	Name string
+
+	// Attributes describe the aspects of the event.
+	Attributes []attribute.KeyValue
+
+	// DroppedAttributeCount is the number of attributes that were not
+	// recorded due to configured limits being reached.
+	DroppedAttributeCount int
+
+	// Time at which this event was recorded.
+	Time time.Time
+}

vendor/go.opentelemetry.io/otel/sdk/trace/evictedqueue.go

@@ -0,0 +1,44 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+// evictedQueue is a FIFO queue with a configurable capacity.
+type evictedQueue struct {
+	queue        []interface{}
+	capacity     int
+	droppedCount int
+}
+
+func newEvictedQueue(capacity int) evictedQueue {
+	// Do not pre-allocate queue, do this lazily.
+	return evictedQueue{capacity: capacity}
+}
+
+// add adds value to the evictedQueue eq. If eq is at capacity, the oldest
+// queued value will be discarded and the drop count incremented.
+func (eq *evictedQueue) add(value interface{}) {
+	if eq.capacity == 0 {
+		eq.droppedCount++
+		return
+	}
+
+	if eq.capacity > 0 && len(eq.queue) == eq.capacity {
+		// Drop first-in while avoiding allocating more capacity to eq.queue.
+		copy(eq.queue[:eq.capacity-1], eq.queue[1:])
+		eq.queue = eq.queue[:eq.capacity-1]
+		eq.droppedCount++
+	}
+	eq.queue = append(eq.queue, value)
+}

vendor/go.opentelemetry.io/otel/sdk/trace/id_generator.go

@@ -0,0 +1,77 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	crand "crypto/rand"
+	"encoding/binary"
+	"math/rand"
+	"sync"
+
+	"go.opentelemetry.io/otel/trace"
+)
+
+// IDGenerator allows custom generators for TraceID and SpanID.
+type IDGenerator interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// NewIDs returns a new trace and span ID.
+	NewIDs(ctx context.Context) (trace.TraceID, trace.SpanID)
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// NewSpanID returns a ID for a new span in the trace with traceID.
+	NewSpanID(ctx context.Context, traceID trace.TraceID) trace.SpanID
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
+
+type randomIDGenerator struct {
+	sync.Mutex
+	randSource *rand.Rand
+}
+
+var _ IDGenerator = &randomIDGenerator{}
+
+// NewSpanID returns a non-zero span ID from a randomly-chosen sequence.
+func (gen *randomIDGenerator) NewSpanID(ctx context.Context, traceID trace.TraceID) trace.SpanID {
+	gen.Lock()
+	defer gen.Unlock()
+	sid := trace.SpanID{}
+	_, _ = gen.randSource.Read(sid[:])
+	return sid
+}
+
+// NewIDs returns a non-zero trace ID and a non-zero span ID from a
+// randomly-chosen sequence.
+func (gen *randomIDGenerator) NewIDs(ctx context.Context) (trace.TraceID, trace.SpanID) {
+	gen.Lock()
+	defer gen.Unlock()
+	tid := trace.TraceID{}
+	_, _ = gen.randSource.Read(tid[:])
+	sid := trace.SpanID{}
+	_, _ = gen.randSource.Read(sid[:])
+	return tid, sid
+}
+
+func defaultIDGenerator() IDGenerator {
+	gen := &randomIDGenerator{}
+	var rngSeed int64
+	_ = binary.Read(crand.Reader, binary.LittleEndian, &rngSeed)
+	gen.randSource = rand.New(rand.NewSource(rngSeed))
+	return gen
+}

vendor/go.opentelemetry.io/otel/sdk/trace/link.go

@@ -0,0 +1,34 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// Link is the relationship between two Spans. The relationship can be within
+// the same Trace or across different Traces.
+type Link struct {
+	// SpanContext of the linked Span.
+	SpanContext trace.SpanContext
+
+	// Attributes describe the aspects of the link.
+	Attributes []attribute.KeyValue
+
+	// DroppedAttributeCount is the number of attributes that were not
+	// recorded due to configured limits being reached.
+	DroppedAttributeCount int
+}

vendor/go.opentelemetry.io/otel/sdk/trace/provider.go

@@ -0,0 +1,500 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	"fmt"
+	"sync"
+	"sync/atomic"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/internal/global"
+	"go.opentelemetry.io/otel/sdk/instrumentation"
+	"go.opentelemetry.io/otel/sdk/resource"
+	"go.opentelemetry.io/otel/trace"
+)
+
+const (
+	defaultTracerName = "go.opentelemetry.io/otel/sdk/tracer"
+)
+
+// tracerProviderConfig.
+type tracerProviderConfig struct {
+	// processors contains collection of SpanProcessors that are processing pipeline
+	// for spans in the trace signal.
+	// SpanProcessors registered with a TracerProvider and are called at the start
+	// and end of a Span's lifecycle, and are called in the order they are
+	// registered.
+	processors []SpanProcessor
+
+	// sampler is the default sampler used when creating new spans.
+	sampler Sampler
+
+	// idGenerator is used to generate all Span and Trace IDs when needed.
+	idGenerator IDGenerator
+
+	// spanLimits defines the attribute, event, and link limits for spans.
+	spanLimits SpanLimits
+
+	// resource contains attributes representing an entity that produces telemetry.
+	resource *resource.Resource
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent this exporter.
+func (cfg tracerProviderConfig) MarshalLog() interface{} {
+	return struct {
+		SpanProcessors  []SpanProcessor
+		SamplerType     string
+		IDGeneratorType string
+		SpanLimits      SpanLimits
+		Resource        *resource.Resource
+	}{
+		SpanProcessors:  cfg.processors,
+		SamplerType:     fmt.Sprintf("%T", cfg.sampler),
+		IDGeneratorType: fmt.Sprintf("%T", cfg.idGenerator),
+		SpanLimits:      cfg.spanLimits,
+		Resource:        cfg.resource,
+	}
+}
+
+// TracerProvider is an OpenTelemetry TracerProvider. It provides Tracers to
+// instrumentation so it can trace operational flow through a system.
+type TracerProvider struct {
+	mu             sync.Mutex
+	namedTracer    map[instrumentation.Scope]*tracer
+	spanProcessors atomic.Pointer[spanProcessorStates]
+
+	isShutdown atomic.Bool
+
+	// These fields are not protected by the lock mu. They are assumed to be
+	// immutable after creation of the TracerProvider.
+	sampler     Sampler
+	idGenerator IDGenerator
+	spanLimits  SpanLimits
+	resource    *resource.Resource
+}
+
+var _ trace.TracerProvider = &TracerProvider{}
+
+// NewTracerProvider returns a new and configured TracerProvider.
+//
+// By default the returned TracerProvider is configured with:
+//   - a ParentBased(AlwaysSample) Sampler
+//   - a random number IDGenerator
+//   - the resource.Default() Resource
+//   - the default SpanLimits.
+//
+// The passed opts are used to override these default values and configure the
+// returned TracerProvider appropriately.
+func NewTracerProvider(opts ...TracerProviderOption) *TracerProvider {
+	o := tracerProviderConfig{
+		spanLimits: NewSpanLimits(),
+	}
+	o = applyTracerProviderEnvConfigs(o)
+
+	for _, opt := range opts {
+		o = opt.apply(o)
+	}
+
+	o = ensureValidTracerProviderConfig(o)
+
+	tp := &TracerProvider{
+		namedTracer: make(map[instrumentation.Scope]*tracer),
+		sampler:     o.sampler,
+		idGenerator: o.idGenerator,
+		spanLimits:  o.spanLimits,
+		resource:    o.resource,
+	}
+	global.Info("TracerProvider created", "config", o)
+
+	spss := make(spanProcessorStates, 0, len(o.processors))
+	for _, sp := range o.processors {
+		spss = append(spss, newSpanProcessorState(sp))
+	}
+	tp.spanProcessors.Store(&spss)
+
+	return tp
+}
+
+// Tracer returns a Tracer with the given name and options. If a Tracer for
+// the given name and options does not exist it is created, otherwise the
+// existing Tracer is returned.
+//
+// If name is empty, DefaultTracerName is used instead.
+//
+// This method is safe to be called concurrently.
+func (p *TracerProvider) Tracer(name string, opts ...trace.TracerOption) trace.Tracer {
+	// This check happens before the mutex is acquired to avoid deadlocking if Tracer() is called from within Shutdown().
+	if p.isShutdown.Load() {
+		return trace.NewNoopTracerProvider().Tracer(name, opts...)
+	}
+	c := trace.NewTracerConfig(opts...)
+	if name == "" {
+		name = defaultTracerName
+	}
+	is := instrumentation.Scope{
+		Name:      name,
+		Version:   c.InstrumentationVersion(),
+		SchemaURL: c.SchemaURL(),
+	}
+
+	t, ok := func() (trace.Tracer, bool) {
+		p.mu.Lock()
+		defer p.mu.Unlock()
+		// Must check the flag after acquiring the mutex to avoid returning a valid tracer if Shutdown() ran
+		// after the first check above but before we acquired the mutex.
+		if p.isShutdown.Load() {
+			return trace.NewNoopTracerProvider().Tracer(name, opts...), true
+		}
+		t, ok := p.namedTracer[is]
+		if !ok {
+			t = &tracer{
+				provider:             p,
+				instrumentationScope: is,
+			}
+			p.namedTracer[is] = t
+		}
+		return t, ok
+	}()
+	if !ok {
+		// This code is outside the mutex to not hold the lock while calling third party logging code:
+		// - That code may do slow things like I/O, which would prolong the duration the lock is held,
+		//   slowing down all tracing consumers.
+		// - Logging code may be instrumented with tracing and deadlock because it could try
+		//   acquiring the same non-reentrant mutex.
+		global.Info("Tracer created", "name", name, "version", is.Version, "schemaURL", is.SchemaURL)
+	}
+	return t
+}
+
+// RegisterSpanProcessor adds the given SpanProcessor to the list of SpanProcessors.
+func (p *TracerProvider) RegisterSpanProcessor(sp SpanProcessor) {
+	// This check prevents calls during a shutdown.
+	if p.isShutdown.Load() {
+		return
+	}
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	// This check prevents calls after a shutdown.
+	if p.isShutdown.Load() {
+		return
+	}
+
+	current := p.getSpanProcessors()
+	newSPS := make(spanProcessorStates, 0, len(current)+1)
+	newSPS = append(newSPS, current...)
+	newSPS = append(newSPS, newSpanProcessorState(sp))
+	p.spanProcessors.Store(&newSPS)
+}
+
+// UnregisterSpanProcessor removes the given SpanProcessor from the list of SpanProcessors.
+func (p *TracerProvider) UnregisterSpanProcessor(sp SpanProcessor) {
+	// This check prevents calls during a shutdown.
+	if p.isShutdown.Load() {
+		return
+	}
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	// This check prevents calls after a shutdown.
+	if p.isShutdown.Load() {
+		return
+	}
+	old := p.getSpanProcessors()
+	if len(old) == 0 {
+		return
+	}
+	spss := make(spanProcessorStates, len(old))
+	copy(spss, old)
+
+	// stop the span processor if it is started and remove it from the list
+	var stopOnce *spanProcessorState
+	var idx int
+	for i, sps := range spss {
+		if sps.sp == sp {
+			stopOnce = sps
+			idx = i
+		}
+	}
+	if stopOnce != nil {
+		stopOnce.state.Do(func() {
+			if err := sp.Shutdown(context.Background()); err != nil {
+				otel.Handle(err)
+			}
+		})
+	}
+	if len(spss) > 1 {
+		copy(spss[idx:], spss[idx+1:])
+	}
+	spss[len(spss)-1] = nil
+	spss = spss[:len(spss)-1]
+
+	p.spanProcessors.Store(&spss)
+}
+
+// ForceFlush immediately exports all spans that have not yet been exported for
+// all the registered span processors.
+func (p *TracerProvider) ForceFlush(ctx context.Context) error {
+	spss := p.getSpanProcessors()
+	if len(spss) == 0 {
+		return nil
+	}
+
+	for _, sps := range spss {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		default:
+		}
+
+		if err := sps.sp.ForceFlush(ctx); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Shutdown shuts down TracerProvider. All registered span processors are shut down
+// in the order they were registered and any held computational resources are released.
+// After Shutdown is called, all methods are no-ops.
+func (p *TracerProvider) Shutdown(ctx context.Context) error {
+	// This check prevents deadlocks in case of recursive shutdown.
+	if p.isShutdown.Load() {
+		return nil
+	}
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	// This check prevents calls after a shutdown has already been done concurrently.
+	if !p.isShutdown.CompareAndSwap(false, true) { // did toggle?
+		return nil
+	}
+
+	var retErr error
+	for _, sps := range p.getSpanProcessors() {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		default:
+		}
+
+		var err error
+		sps.state.Do(func() {
+			err = sps.sp.Shutdown(ctx)
+		})
+		if err != nil {
+			if retErr == nil {
+				retErr = err
+			} else {
+				// Poor man's list of errors
+				retErr = fmt.Errorf("%v; %v", retErr, err)
+			}
+		}
+	}
+	p.spanProcessors.Store(&spanProcessorStates{})
+	return retErr
+}
+
+func (p *TracerProvider) getSpanProcessors() spanProcessorStates {
+	return *(p.spanProcessors.Load())
+}
+
+// TracerProviderOption configures a TracerProvider.
+type TracerProviderOption interface {
+	apply(tracerProviderConfig) tracerProviderConfig
+}
+
+type traceProviderOptionFunc func(tracerProviderConfig) tracerProviderConfig
+
+func (fn traceProviderOptionFunc) apply(cfg tracerProviderConfig) tracerProviderConfig {
+	return fn(cfg)
+}
+
+// WithSyncer registers the exporter with the TracerProvider using a
+// SimpleSpanProcessor.
+//
+// This is not recommended for production use. The synchronous nature of the
+// SimpleSpanProcessor that will wrap the exporter make it good for testing,
+// debugging, or showing examples of other feature, but it will be slow and
+// have a high computation resource usage overhead. The WithBatcher option is
+// recommended for production use instead.
+func WithSyncer(e SpanExporter) TracerProviderOption {
+	return WithSpanProcessor(NewSimpleSpanProcessor(e))
+}
+
+// WithBatcher registers the exporter with the TracerProvider using a
+// BatchSpanProcessor configured with the passed opts.
+func WithBatcher(e SpanExporter, opts ...BatchSpanProcessorOption) TracerProviderOption {
+	return WithSpanProcessor(NewBatchSpanProcessor(e, opts...))
+}
+
+// WithSpanProcessor registers the SpanProcessor with a TracerProvider.
+func WithSpanProcessor(sp SpanProcessor) TracerProviderOption {
+	return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+		cfg.processors = append(cfg.processors, sp)
+		return cfg
+	})
+}
+
+// WithResource returns a TracerProviderOption that will configure the
+// Resource r as a TracerProvider's Resource. The configured Resource is
+// referenced by all the Tracers the TracerProvider creates. It represents the
+// entity producing telemetry.
+//
+// If this option is not used, the TracerProvider will use the
+// resource.Default() Resource by default.
+func WithResource(r *resource.Resource) TracerProviderOption {
+	return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+		var err error
+		cfg.resource, err = resource.Merge(resource.Environment(), r)
+		if err != nil {
+			otel.Handle(err)
+		}
+		return cfg
+	})
+}
+
+// WithIDGenerator returns a TracerProviderOption that will configure the
+// IDGenerator g as a TracerProvider's IDGenerator. The configured IDGenerator
+// is used by the Tracers the TracerProvider creates to generate new Span and
+// Trace IDs.
+//
+// If this option is not used, the TracerProvider will use a random number
+// IDGenerator by default.
+func WithIDGenerator(g IDGenerator) TracerProviderOption {
+	return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+		if g != nil {
+			cfg.idGenerator = g
+		}
+		return cfg
+	})
+}
+
+// WithSampler returns a TracerProviderOption that will configure the Sampler
+// s as a TracerProvider's Sampler. The configured Sampler is used by the
+// Tracers the TracerProvider creates to make their sampling decisions for the
+// Spans they create.
+//
+// This option overrides the Sampler configured through the OTEL_TRACES_SAMPLER
+// and OTEL_TRACES_SAMPLER_ARG environment variables. If this option is not used
+// and the sampler is not configured through environment variables or the environment
+// contains invalid/unsupported configuration, the TracerProvider will use a
+// ParentBased(AlwaysSample) Sampler by default.
+func WithSampler(s Sampler) TracerProviderOption {
+	return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+		if s != nil {
+			cfg.sampler = s
+		}
+		return cfg
+	})
+}
+
+// WithSpanLimits returns a TracerProviderOption that configures a
+// TracerProvider to use the SpanLimits sl. These SpanLimits bound any Span
+// created by a Tracer from the TracerProvider.
+//
+// If any field of sl is zero or negative it will be replaced with the default
+// value for that field.
+//
+// If this or WithRawSpanLimits are not provided, the TracerProvider will use
+// the limits defined by environment variables, or the defaults if unset.
+// Refer to the NewSpanLimits documentation for information about this
+// relationship.
+//
+// Deprecated: Use WithRawSpanLimits instead which allows setting unlimited
+// and zero limits. This option will be kept until the next major version
+// incremented release.
+func WithSpanLimits(sl SpanLimits) TracerProviderOption {
+	if sl.AttributeValueLengthLimit <= 0 {
+		sl.AttributeValueLengthLimit = DefaultAttributeValueLengthLimit
+	}
+	if sl.AttributeCountLimit <= 0 {
+		sl.AttributeCountLimit = DefaultAttributeCountLimit
+	}
+	if sl.EventCountLimit <= 0 {
+		sl.EventCountLimit = DefaultEventCountLimit
+	}
+	if sl.AttributePerEventCountLimit <= 0 {
+		sl.AttributePerEventCountLimit = DefaultAttributePerEventCountLimit
+	}
+	if sl.LinkCountLimit <= 0 {
+		sl.LinkCountLimit = DefaultLinkCountLimit
+	}
+	if sl.AttributePerLinkCountLimit <= 0 {
+		sl.AttributePerLinkCountLimit = DefaultAttributePerLinkCountLimit
+	}
+	return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+		cfg.spanLimits = sl
+		return cfg
+	})
+}
+
+// WithRawSpanLimits returns a TracerProviderOption that configures a
+// TracerProvider to use these limits. These limits bound any Span created by
+// a Tracer from the TracerProvider.
+//
+// The limits will be used as-is. Zero or negative values will not be changed
+// to the default value like WithSpanLimits does. Setting a limit to zero will
+// effectively disable the related resource it limits and setting to a
+// negative value will mean that resource is unlimited. Consequentially, this
+// means that the zero-value SpanLimits will disable all span resources.
+// Because of this, limits should be constructed using NewSpanLimits and
+// updated accordingly.
+//
+// If this or WithSpanLimits are not provided, the TracerProvider will use the
+// limits defined by environment variables, or the defaults if unset. Refer to
+// the NewSpanLimits documentation for information about this relationship.
+func WithRawSpanLimits(limits SpanLimits) TracerProviderOption {
+	return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+		cfg.spanLimits = limits
+		return cfg
+	})
+}
+
+func applyTracerProviderEnvConfigs(cfg tracerProviderConfig) tracerProviderConfig {
+	for _, opt := range tracerProviderOptionsFromEnv() {
+		cfg = opt.apply(cfg)
+	}
+
+	return cfg
+}
+
+func tracerProviderOptionsFromEnv() []TracerProviderOption {
+	var opts []TracerProviderOption
+
+	sampler, err := samplerFromEnv()
+	if err != nil {
+		otel.Handle(err)
+	}
+
+	if sampler != nil {
+		opts = append(opts, WithSampler(sampler))
+	}
+
+	return opts
+}
+
+// ensureValidTracerProviderConfig ensures that given TracerProviderConfig is valid.
+func ensureValidTracerProviderConfig(cfg tracerProviderConfig) tracerProviderConfig {
+	if cfg.sampler == nil {
+		cfg.sampler = ParentBased(AlwaysSample())
+	}
+	if cfg.idGenerator == nil {
+		cfg.idGenerator = defaultIDGenerator()
+	}
+	if cfg.resource == nil {
+		cfg.resource = resource.Default()
+	}
+	return cfg
+}

vendor/go.opentelemetry.io/otel/sdk/trace/sampler_env.go

@@ -0,0 +1,108 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+const (
+	tracesSamplerKey    = "OTEL_TRACES_SAMPLER"
+	tracesSamplerArgKey = "OTEL_TRACES_SAMPLER_ARG"
+
+	samplerAlwaysOn                = "always_on"
+	samplerAlwaysOff               = "always_off"
+	samplerTraceIDRatio            = "traceidratio"
+	samplerParentBasedAlwaysOn     = "parentbased_always_on"
+	samplerParsedBasedAlwaysOff    = "parentbased_always_off"
+	samplerParentBasedTraceIDRatio = "parentbased_traceidratio"
+)
+
+type errUnsupportedSampler string
+
+func (e errUnsupportedSampler) Error() string {
+	return fmt.Sprintf("unsupported sampler: %s", string(e))
+}
+
+var (
+	errNegativeTraceIDRatio       = errors.New("invalid trace ID ratio: less than 0.0")
+	errGreaterThanOneTraceIDRatio = errors.New("invalid trace ID ratio: greater than 1.0")
+)
+
+type samplerArgParseError struct {
+	parseErr error
+}
+
+func (e samplerArgParseError) Error() string {
+	return fmt.Sprintf("parsing sampler argument: %s", e.parseErr.Error())
+}
+
+func (e samplerArgParseError) Unwrap() error {
+	return e.parseErr
+}
+
+func samplerFromEnv() (Sampler, error) {
+	sampler, ok := os.LookupEnv(tracesSamplerKey)
+	if !ok {
+		return nil, nil
+	}
+
+	sampler = strings.ToLower(strings.TrimSpace(sampler))
+	samplerArg, hasSamplerArg := os.LookupEnv(tracesSamplerArgKey)
+	samplerArg = strings.TrimSpace(samplerArg)
+
+	switch sampler {
+	case samplerAlwaysOn:
+		return AlwaysSample(), nil
+	case samplerAlwaysOff:
+		return NeverSample(), nil
+	case samplerTraceIDRatio:
+		if !hasSamplerArg {
+			return TraceIDRatioBased(1.0), nil
+		}
+		return parseTraceIDRatio(samplerArg)
+	case samplerParentBasedAlwaysOn:
+		return ParentBased(AlwaysSample()), nil
+	case samplerParsedBasedAlwaysOff:
+		return ParentBased(NeverSample()), nil
+	case samplerParentBasedTraceIDRatio:
+		if !hasSamplerArg {
+			return ParentBased(TraceIDRatioBased(1.0)), nil
+		}
+		ratio, err := parseTraceIDRatio(samplerArg)
+		return ParentBased(ratio), err
+	default:
+		return nil, errUnsupportedSampler(sampler)
+	}
+}
+
+func parseTraceIDRatio(arg string) (Sampler, error) {
+	v, err := strconv.ParseFloat(arg, 64)
+	if err != nil {
+		return TraceIDRatioBased(1.0), samplerArgParseError{err}
+	}
+	if v < 0.0 {
+		return TraceIDRatioBased(1.0), errNegativeTraceIDRatio
+	}
+	if v > 1.0 {
+		return TraceIDRatioBased(1.0), errGreaterThanOneTraceIDRatio
+	}
+
+	return TraceIDRatioBased(v), nil
+}

vendor/go.opentelemetry.io/otel/sdk/trace/sampling.go

@@ -0,0 +1,293 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	"encoding/binary"
+	"fmt"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// Sampler decides whether a trace should be sampled and exported.
+type Sampler interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// ShouldSample returns a SamplingResult based on a decision made from the
+	// passed parameters.
+	ShouldSample(parameters SamplingParameters) SamplingResult
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Description returns information describing the Sampler.
+	Description() string
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
+
+// SamplingParameters contains the values passed to a Sampler.
+type SamplingParameters struct {
+	ParentContext context.Context
+	TraceID       trace.TraceID
+	Name          string
+	Kind          trace.SpanKind
+	Attributes    []attribute.KeyValue
+	Links         []trace.Link
+}
+
+// SamplingDecision indicates whether a span is dropped, recorded and/or sampled.
+type SamplingDecision uint8
+
+// Valid sampling decisions.
+const (
+	// Drop will not record the span and all attributes/events will be dropped.
+	Drop SamplingDecision = iota
+
+	// Record indicates the span's `IsRecording() == true`, but `Sampled` flag
+	// *must not* be set.
+	RecordOnly
+
+	// RecordAndSample has span's `IsRecording() == true` and `Sampled` flag
+	// *must* be set.
+	RecordAndSample
+)
+
+// SamplingResult conveys a SamplingDecision, set of Attributes and a Tracestate.
+type SamplingResult struct {
+	Decision   SamplingDecision
+	Attributes []attribute.KeyValue
+	Tracestate trace.TraceState
+}
+
+type traceIDRatioSampler struct {
+	traceIDUpperBound uint64
+	description       string
+}
+
+func (ts traceIDRatioSampler) ShouldSample(p SamplingParameters) SamplingResult {
+	psc := trace.SpanContextFromContext(p.ParentContext)
+	x := binary.BigEndian.Uint64(p.TraceID[8:16]) >> 1
+	if x < ts.traceIDUpperBound {
+		return SamplingResult{
+			Decision:   RecordAndSample,
+			Tracestate: psc.TraceState(),
+		}
+	}
+	return SamplingResult{
+		Decision:   Drop,
+		Tracestate: psc.TraceState(),
+	}
+}
+
+func (ts traceIDRatioSampler) Description() string {
+	return ts.description
+}
+
+// TraceIDRatioBased samples a given fraction of traces. Fractions >= 1 will
+// always sample. Fractions < 0 are treated as zero. To respect the
+// parent trace's `SampledFlag`, the `TraceIDRatioBased` sampler should be used
+// as a delegate of a `Parent` sampler.
+//
+//nolint:revive // revive complains about stutter of `trace.TraceIDRatioBased`
+func TraceIDRatioBased(fraction float64) Sampler {
+	if fraction >= 1 {
+		return AlwaysSample()
+	}
+
+	if fraction <= 0 {
+		fraction = 0
+	}
+
+	return &traceIDRatioSampler{
+		traceIDUpperBound: uint64(fraction * (1 << 63)),
+		description:       fmt.Sprintf("TraceIDRatioBased{%g}", fraction),
+	}
+}
+
+type alwaysOnSampler struct{}
+
+func (as alwaysOnSampler) ShouldSample(p SamplingParameters) SamplingResult {
+	return SamplingResult{
+		Decision:   RecordAndSample,
+		Tracestate: trace.SpanContextFromContext(p.ParentContext).TraceState(),
+	}
+}
+
+func (as alwaysOnSampler) Description() string {
+	return "AlwaysOnSampler"
+}
+
+// AlwaysSample returns a Sampler that samples every trace.
+// Be careful about using this sampler in a production application with
+// significant traffic: a new trace will be started and exported for every
+// request.
+func AlwaysSample() Sampler {
+	return alwaysOnSampler{}
+}
+
+type alwaysOffSampler struct{}
+
+func (as alwaysOffSampler) ShouldSample(p SamplingParameters) SamplingResult {
+	return SamplingResult{
+		Decision:   Drop,
+		Tracestate: trace.SpanContextFromContext(p.ParentContext).TraceState(),
+	}
+}
+
+func (as alwaysOffSampler) Description() string {
+	return "AlwaysOffSampler"
+}
+
+// NeverSample returns a Sampler that samples no traces.
+func NeverSample() Sampler {
+	return alwaysOffSampler{}
+}
+
+// ParentBased returns a composite sampler which behaves differently,
+// based on the parent of the span. If the span has no parent,
+// the root(Sampler) is used to make sampling decision. If the span has
+// a parent, depending on whether the parent is remote and whether it
+// is sampled, one of the following samplers will apply:
+//   - remoteParentSampled(Sampler) (default: AlwaysOn)
+//   - remoteParentNotSampled(Sampler) (default: AlwaysOff)
+//   - localParentSampled(Sampler) (default: AlwaysOn)
+//   - localParentNotSampled(Sampler) (default: AlwaysOff)
+func ParentBased(root Sampler, samplers ...ParentBasedSamplerOption) Sampler {
+	return parentBased{
+		root:   root,
+		config: configureSamplersForParentBased(samplers),
+	}
+}
+
+type parentBased struct {
+	root   Sampler
+	config samplerConfig
+}
+
+func configureSamplersForParentBased(samplers []ParentBasedSamplerOption) samplerConfig {
+	c := samplerConfig{
+		remoteParentSampled:    AlwaysSample(),
+		remoteParentNotSampled: NeverSample(),
+		localParentSampled:     AlwaysSample(),
+		localParentNotSampled:  NeverSample(),
+	}
+
+	for _, so := range samplers {
+		c = so.apply(c)
+	}
+
+	return c
+}
+
+// samplerConfig is a group of options for parentBased sampler.
+type samplerConfig struct {
+	remoteParentSampled, remoteParentNotSampled Sampler
+	localParentSampled, localParentNotSampled   Sampler
+}
+
+// ParentBasedSamplerOption configures the sampler for a particular sampling case.
+type ParentBasedSamplerOption interface {
+	apply(samplerConfig) samplerConfig
+}
+
+// WithRemoteParentSampled sets the sampler for the case of sampled remote parent.
+func WithRemoteParentSampled(s Sampler) ParentBasedSamplerOption {
+	return remoteParentSampledOption{s}
+}
+
+type remoteParentSampledOption struct {
+	s Sampler
+}
+
+func (o remoteParentSampledOption) apply(config samplerConfig) samplerConfig {
+	config.remoteParentSampled = o.s
+	return config
+}
+
+// WithRemoteParentNotSampled sets the sampler for the case of remote parent
+// which is not sampled.
+func WithRemoteParentNotSampled(s Sampler) ParentBasedSamplerOption {
+	return remoteParentNotSampledOption{s}
+}
+
+type remoteParentNotSampledOption struct {
+	s Sampler
+}
+
+func (o remoteParentNotSampledOption) apply(config samplerConfig) samplerConfig {
+	config.remoteParentNotSampled = o.s
+	return config
+}
+
+// WithLocalParentSampled sets the sampler for the case of sampled local parent.
+func WithLocalParentSampled(s Sampler) ParentBasedSamplerOption {
+	return localParentSampledOption{s}
+}
+
+type localParentSampledOption struct {
+	s Sampler
+}
+
+func (o localParentSampledOption) apply(config samplerConfig) samplerConfig {
+	config.localParentSampled = o.s
+	return config
+}
+
+// WithLocalParentNotSampled sets the sampler for the case of local parent
+// which is not sampled.
+func WithLocalParentNotSampled(s Sampler) ParentBasedSamplerOption {
+	return localParentNotSampledOption{s}
+}
+
+type localParentNotSampledOption struct {
+	s Sampler
+}
+
+func (o localParentNotSampledOption) apply(config samplerConfig) samplerConfig {
+	config.localParentNotSampled = o.s
+	return config
+}
+
+func (pb parentBased) ShouldSample(p SamplingParameters) SamplingResult {
+	psc := trace.SpanContextFromContext(p.ParentContext)
+	if psc.IsValid() {
+		if psc.IsRemote() {
+			if psc.IsSampled() {
+				return pb.config.remoteParentSampled.ShouldSample(p)
+			}
+			return pb.config.remoteParentNotSampled.ShouldSample(p)
+		}
+
+		if psc.IsSampled() {
+			return pb.config.localParentSampled.ShouldSample(p)
+		}
+		return pb.config.localParentNotSampled.ShouldSample(p)
+	}
+	return pb.root.ShouldSample(p)
+}
+
+func (pb parentBased) Description() string {
+	return fmt.Sprintf("ParentBased{root:%s,remoteParentSampled:%s,"+
+		"remoteParentNotSampled:%s,localParentSampled:%s,localParentNotSampled:%s}",
+		pb.root.Description(),
+		pb.config.remoteParentSampled.Description(),
+		pb.config.remoteParentNotSampled.Description(),
+		pb.config.localParentSampled.Description(),
+		pb.config.localParentNotSampled.Description(),
+	)
+}

vendor/go.opentelemetry.io/otel/sdk/trace/simple_span_processor.go

@@ -0,0 +1,131 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	"sync"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/internal/global"
+)
+
+// simpleSpanProcessor is a SpanProcessor that synchronously sends all
+// completed Spans to a trace.Exporter immediately.
+type simpleSpanProcessor struct {
+	exporterMu sync.Mutex
+	exporter   SpanExporter
+	stopOnce   sync.Once
+}
+
+var _ SpanProcessor = (*simpleSpanProcessor)(nil)
+
+// NewSimpleSpanProcessor returns a new SpanProcessor that will synchronously
+// send completed spans to the exporter immediately.
+//
+// This SpanProcessor is not recommended for production use. The synchronous
+// nature of this SpanProcessor make it good for testing, debugging, or
+// showing examples of other feature, but it will be slow and have a high
+// computation resource usage overhead. The BatchSpanProcessor is recommended
+// for production use instead.
+func NewSimpleSpanProcessor(exporter SpanExporter) SpanProcessor {
+	ssp := &simpleSpanProcessor{
+		exporter: exporter,
+	}
+	global.Warn("SimpleSpanProcessor is not recommended for production use, consider using BatchSpanProcessor instead.")
+
+	return ssp
+}
+
+// OnStart does nothing.
+func (ssp *simpleSpanProcessor) OnStart(context.Context, ReadWriteSpan) {}
+
+// OnEnd immediately exports a ReadOnlySpan.
+func (ssp *simpleSpanProcessor) OnEnd(s ReadOnlySpan) {
+	ssp.exporterMu.Lock()
+	defer ssp.exporterMu.Unlock()
+
+	if ssp.exporter != nil && s.SpanContext().TraceFlags().IsSampled() {
+		if err := ssp.exporter.ExportSpans(context.Background(), []ReadOnlySpan{s}); err != nil {
+			otel.Handle(err)
+		}
+	}
+}
+
+// Shutdown shuts down the exporter this SimpleSpanProcessor exports to.
+func (ssp *simpleSpanProcessor) Shutdown(ctx context.Context) error {
+	var err error
+	ssp.stopOnce.Do(func() {
+		stopFunc := func(exp SpanExporter) (<-chan error, func()) {
+			done := make(chan error)
+			return done, func() { done <- exp.Shutdown(ctx) }
+		}
+
+		// The exporter field of the simpleSpanProcessor needs to be zeroed to
+		// signal it is shut down, meaning all subsequent calls to OnEnd will
+		// be gracefully ignored. This needs to be done synchronously to avoid
+		// any race condition.
+		//
+		// A closure is used to keep reference to the exporter and then the
+		// field is zeroed. This ensures the simpleSpanProcessor is shut down
+		// before the exporter. This order is important as it avoids a
+		// potential deadlock. If the exporter shut down operation generates a
+		// span, that span would need to be exported. Meaning, OnEnd would be
+		// called and try acquiring the lock that is held here.
+		ssp.exporterMu.Lock()
+		done, shutdown := stopFunc(ssp.exporter)
+		ssp.exporter = nil
+		ssp.exporterMu.Unlock()
+
+		go shutdown()
+
+		// Wait for the exporter to shut down or the deadline to expire.
+		select {
+		case err = <-done:
+		case <-ctx.Done():
+			// It is possible for the exporter to have immediately shut down
+			// and the context to be done simultaneously. In that case this
+			// outer select statement will randomly choose a case. This will
+			// result in a different returned error for similar scenarios.
+			// Instead, double check if the exporter shut down at the same
+			// time and return that error if so. This will ensure consistency
+			// as well as ensure the caller knows the exporter shut down
+			// successfully (they can already determine if the deadline is
+			// expired given they passed the context).
+			select {
+			case err = <-done:
+			default:
+				err = ctx.Err()
+			}
+		}
+	})
+	return err
+}
+
+// ForceFlush does nothing as there is no data to flush.
+func (ssp *simpleSpanProcessor) ForceFlush(context.Context) error {
+	return nil
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent this Span Processor.
+func (ssp *simpleSpanProcessor) MarshalLog() interface{} {
+	return struct {
+		Type     string
+		Exporter SpanExporter
+	}{
+		Type:     "SimpleSpanProcessor",
+		Exporter: ssp.exporter,
+	}
+}