86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
/*
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Copyright 2020 The Flux authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package server
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import (
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"context"
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"crypto/sha256"
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"fmt"
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"net/http"
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"net/url"
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"os"
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"strings"
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"time"
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"github.com/go-logr/logr"
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"github.com/slok/go-http-metrics/middleware"
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"github.com/slok/go-http-metrics/middleware/std"
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"sigs.k8s.io/controller-runtime/pkg/client"
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)
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// ReceiverServer handles webhook POST requests
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type ReceiverServer struct {
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port string
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logger logr.Logger
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kubeClient client.Client
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}
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// NewEventServer returns an HTTP server that handles webhooks
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func NewReceiverServer(port string, logger logr.Logger, kubeClient client.Client) *ReceiverServer {
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return &ReceiverServer{
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port: port,
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logger: logger.WithName("receiver-server"),
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kubeClient: kubeClient,
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}
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}
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// ListenAndServe starts the HTTP server on the specified port
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func (s *ReceiverServer) ListenAndServe(stopCh <-chan struct{}, mdlw middleware.Middleware) {
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mux := http.NewServeMux()
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mux.Handle("/hook/", http.HandlerFunc(s.handlePayload()))
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h := std.Handler("", mdlw, mux)
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srv := &http.Server{
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Addr: s.port,
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Handler: h,
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}
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go func() {
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if err := srv.ListenAndServe(); err != http.ErrServerClosed {
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s.logger.Error(err, "Receiver server crashed")
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os.Exit(1)
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}
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}()
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// wait for SIGTERM or SIGINT
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<-stopCh
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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if err := srv.Shutdown(ctx); err != nil {
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s.logger.Error(err, "Receiver server graceful shutdown failed")
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} else {
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s.logger.Info("Receiver server stopped")
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}
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}
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func receiverKeyFunc(r *http.Request) (string, error) {
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id := url.PathEscape(strings.TrimLeft(r.RequestURI, "/hook/"))
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val := strings.Join([]string{"receiver", id}, "/")
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digest := sha256.Sum256([]byte(val))
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return fmt.Sprintf("%x", digest), nil
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}
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