mirror of
https://github.com/Luzifer/nginx-sso.git
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110 lines
3 KiB
Go
110 lines
3 KiB
Go
// Copyright 2018 Google LLC
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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// httpr is a proxy that can record or replay HTTP requests.
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// Start httpr with either the -record or -replay flags, providing a filename.
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// Terminate the process with an interrupt (kill -2) to write the log file when recording.
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// To get the CA certificate of the proxy, issue a GET to http://localhost:CP/authority.cer, where
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// CP is the control port.
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package main
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import (
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"flag"
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"fmt"
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"io/ioutil"
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"log"
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"net"
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"net/http"
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"os"
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"os/signal"
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"cloud.google.com/go/httpreplay/internal/proxy"
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"github.com/google/martian/martianhttp"
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)
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var (
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port = flag.Int("port", 8080, "port of the proxy")
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controlPort = flag.Int("control-port", 8181, "port for controlling the proxy")
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record = flag.String("record", "", "record traffic and save to filename")
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replay = flag.String("replay", "", "read filename and replay traffic")
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debugHeaders = flag.Bool("debug-headers", false, "log header mismatches")
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)
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func main() {
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flag.Parse()
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if *record == "" && *replay == "" {
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log.Fatal("provide either -record or -replay")
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}
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if *record != "" && *replay != "" {
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log.Fatal("provide only one of -record and -replay")
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}
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log.Printf("httpr: starting proxy on port %d and control on port %d", *port, *controlPort)
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var pr *proxy.Proxy
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var err error
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if *record != "" {
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pr, err = proxy.ForRecording(*record, *port)
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} else {
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pr, err = proxy.ForReplaying(*replay, *port)
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}
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if err != nil {
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log.Fatal(err)
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}
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proxy.DebugHeaders = *debugHeaders
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// Expose handlers on the control port.
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mux := http.NewServeMux()
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mux.Handle("/authority.cer", martianhttp.NewAuthorityHandler(pr.CACert))
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mux.HandleFunc("/initial", handleInitial(pr))
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lControl, err := net.Listen("tcp", fmt.Sprintf(":%d", *controlPort))
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if err != nil {
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log.Fatal(err)
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}
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go http.Serve(lControl, mux)
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sigc := make(chan os.Signal, 1)
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signal.Notify(sigc, os.Interrupt)
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<-sigc
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log.Println("httpr: shutting down")
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if err := pr.Close(); err != nil {
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log.Fatal(err)
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}
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}
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func handleInitial(pr *proxy.Proxy) http.HandlerFunc {
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return func(w http.ResponseWriter, req *http.Request) {
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switch req.Method {
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case "GET":
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if pr.Initial != nil {
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w.Write(pr.Initial)
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}
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case "POST":
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bytes, err := ioutil.ReadAll(req.Body)
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req.Body.Close()
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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fmt.Fprintf(w, "reading body: %v", err)
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}
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pr.Initial = bytes
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default:
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w.WriteHeader(http.StatusBadRequest)
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fmt.Fprint(w, "use GET to retrieve initial or POST to set it")
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}
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}
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}
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