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grpc-go
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/*
*
* Copyright 2021 gRPC 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 grpc
import (
"context"
"errors"
"net"
"net/url"
"testing"
"time"
"github.com/google/go-cmp/cmp"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/resolver"
)
func (s) TestParsedTarget_Success_WithoutCustomDialer(t *testing.T) {
defScheme := resolver.GetDefaultScheme()
tests := []struct {
target string
badScheme bool
wantParsed resolver.Target
}{
// No scheme is specified.
{target: "://", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "://"}},
{target: ":///", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: ":///"}},
{target: "://a/", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "://a/"}},
{target: ":///a", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: ":///a"}},
{target: "://a/b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "://a/b"}},
{target: "/", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "/"}},
{target: "a/b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "a/b"}},
{target: "a//b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "a//b"}},
{target: "google.com", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "google.com"}},
{target: "google.com/?a=b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "google.com/"}},
{target: "/unix/socket/address", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "/unix/socket/address"}},
// An unregistered scheme is specified.
{target: "a:///", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "a:///"}},
{target: "a://b/", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "a://b/"}},
{target: "a:///b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "a:///b"}},
{target: "a://b/c", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "a://b/c"}},
{target: "a:b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "a:b"}},
{target: "a:/b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "a:/b"}},
{target: "a://b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "a://b"}},
// A registered scheme is specified.
{target: "dns:///google.com", wantParsed: resolver.Target{Scheme: "dns", Authority: "", Endpoint: "google.com"}},
{target: "dns://a.server.com/google.com", wantParsed: resolver.Target{Scheme: "dns", Authority: "a.server.com", Endpoint: "google.com"}},
{target: "dns://a.server.com/google.com/?a=b", wantParsed: resolver.Target{Scheme: "dns", Authority: "a.server.com", Endpoint: "google.com/"}},
{target: "unix:///a/b/c", wantParsed: resolver.Target{Scheme: "unix", Authority: "", Endpoint: "a/b/c"}},
{target: "unix-abstract:a/b/c", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", Endpoint: "a/b/c"}},
{target: "unix-abstract:a b", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", Endpoint: "a b"}},
{target: "unix-abstract:a:b", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", Endpoint: "a:b"}},
{target: "unix-abstract:a-b", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", Endpoint: "a-b"}},
{target: "unix-abstract:/ a///://::!@#$%25^&*()b", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", Endpoint: " a///://::!@"}},
{target: "unix-abstract:passthrough:abc", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", Endpoint: "passthrough:abc"}},
{target: "unix-abstract:unix:///abc", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", Endpoint: "unix:///abc"}},
{target: "unix-abstract:///a/b/c", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", Endpoint: "a/b/c"}},
{target: "unix-abstract:///", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", Endpoint: ""}},
{target: "passthrough:///unix:///a/b/c", wantParsed: resolver.Target{Scheme: "passthrough", Authority: "", Endpoint: "unix:///a/b/c"}},
// Cases for `scheme:absolute-path`.
{target: "dns:/a/b/c", wantParsed: resolver.Target{Scheme: "dns", Authority: "", Endpoint: "a/b/c"}},
{target: "unregistered:/a/b/c", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "unregistered:/a/b/c"}},
}
for _, test := range tests {
t.Run(test.target, func(t *testing.T) {
target := test.target
if test.badScheme {
target = defScheme + ":///" + target
}
url, err := url.Parse(target)
if err != nil {
t.Fatalf("Unexpected error parsing URL: %v", err)
}
test.wantParsed.URL = *url
cc, err := Dial(test.target, WithTransportCredentials(insecure.NewCredentials()))
if err != nil {
t.Fatalf("Dial(%q) failed: %v", test.target, err)
}
defer cc.Close()
if !cmp.Equal(cc.parsedTarget, test.wantParsed) {
t.Errorf("cc.parsedTarget for dial target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantParsed)
}
})
}
}
func (s) TestParsedTarget_Failure_WithoutCustomDialer(t *testing.T) {
targets := []string{
"",
"unix://a/b/c",
"unix://authority",
"unix-abstract://authority/a/b/c",
"unix-abstract://authority",
}
for _, target := range targets {
t.Run(target, func(t *testing.T) {
if cc, err := Dial(target, WithTransportCredentials(insecure.NewCredentials())); err == nil {
defer cc.Close()
t.Fatalf("Dial(%q) succeeded cc.parsedTarget = %+v, expected to fail", target, cc.parsedTarget)
}
})
}
}
func (s) TestParsedTarget_WithCustomDialer(t *testing.T) {
defScheme := resolver.GetDefaultScheme()
tests := []struct {
target string
badScheme bool
wantParsed resolver.Target
wantDialerAddress string
}{
// unix:[local_path], unix:[/absolute], and unix://[/absolute] have
// different behaviors with a custom dialer.
{
target: "unix:a/b/c",
wantParsed: resolver.Target{Scheme: "unix", Authority: "", Endpoint: "a/b/c"},
wantDialerAddress: "unix:a/b/c",
},
{
target: "unix:/a/b/c",
wantParsed: resolver.Target{Scheme: "unix", Authority: "", Endpoint: "a/b/c"},
wantDialerAddress: "unix:///a/b/c",
},
{
target: "unix:///a/b/c",
wantParsed: resolver.Target{Scheme: "unix", Authority: "", Endpoint: "a/b/c"},
wantDialerAddress: "unix:///a/b/c",
},
{
target: "dns:///127.0.0.1:50051",
wantParsed: resolver.Target{Scheme: "dns", Authority: "", Endpoint: "127.0.0.1:50051"},
wantDialerAddress: "127.0.0.1:50051",
},
{
target: ":///127.0.0.1:50051",
badScheme: true,
wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: ":///127.0.0.1:50051"},
wantDialerAddress: ":///127.0.0.1:50051",
},
{
target: "dns://authority/127.0.0.1:50051",
wantParsed: resolver.Target{Scheme: "dns", Authority: "authority", Endpoint: "127.0.0.1:50051"},
wantDialerAddress: "127.0.0.1:50051",
},
{
target: "://authority/127.0.0.1:50051",
badScheme: true,
wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "://authority/127.0.0.1:50051"},
wantDialerAddress: "://authority/127.0.0.1:50051",
},
{
target: "/unix/socket/address",
badScheme: true,
wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: "/unix/socket/address"},
wantDialerAddress: "/unix/socket/address",
},
{
target: "",
badScheme: true,
wantParsed: resolver.Target{Scheme: defScheme, Authority: "", Endpoint: ""},
wantDialerAddress: "",
},
{
target: "passthrough://a.server.com/google.com",
wantParsed: resolver.Target{Scheme: "passthrough", Authority: "a.server.com", Endpoint: "google.com"},
wantDialerAddress: "google.com",
},
}
for _, test := range tests {
t.Run(test.target, func(t *testing.T) {
target := test.target
if test.badScheme {
target = defScheme + ":///" + target
}
url, err := url.Parse(target)
if err != nil {
t.Fatalf("Unexpected error parsing URL: %v", err)
}
test.wantParsed.URL = *url
addrCh := make(chan string, 1)
dialer := func(ctx context.Context, address string) (net.Conn, error) {
addrCh <- address
return nil, errors.New("dialer error")
}
cc, err := Dial(test.target, WithTransportCredentials(insecure.NewCredentials()), WithContextDialer(dialer))
if err != nil {
t.Fatalf("Dial(%q) failed: %v", test.target, err)
}
defer cc.Close()
select {
case addr := <-addrCh:
if addr != test.wantDialerAddress {
t.Fatalf("address in custom dialer is %q, want %q", addr, test.wantDialerAddress)
}
case <-time.After(time.Second):
t.Fatal("timeout when waiting for custom dialer to be invoked")
}
if !cmp.Equal(cc.parsedTarget, test.wantParsed) {
t.Errorf("cc.parsedTarget for dial target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantParsed)
}
})
}
}
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