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Source file src/net/http/httputil/example_test.go

Documentation: net/http/httputil

  // Copyright 2015 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.
  
  package httputil_test
  
  import (
  	"fmt"
  	"io/ioutil"
  	"log"
  	"net/http"
  	"net/http/httptest"
  	"net/http/httputil"
  	"net/url"
  	"strings"
  )
  
  func ExampleDumpRequest() {
  	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
  		dump, err := httputil.DumpRequest(r, true)
  		if err != nil {
  			http.Error(w, fmt.Sprint(err), http.StatusInternalServerError)
  			return
  		}
  
  		fmt.Fprintf(w, "%q", dump)
  	}))
  	defer ts.Close()
  
  	const body = "Go is a general-purpose language designed with systems programming in mind."
  	req, err := http.NewRequest("POST", ts.URL, strings.NewReader(body))
  	if err != nil {
  		log.Fatal(err)
  	}
  	req.Host = "www.example.org"
  	resp, err := http.DefaultClient.Do(req)
  	if err != nil {
  		log.Fatal(err)
  	}
  	defer resp.Body.Close()
  
  	b, err := ioutil.ReadAll(resp.Body)
  	if err != nil {
  		log.Fatal(err)
  	}
  
  	fmt.Printf("%s", b)
  
  	// Output:
  	// "POST / HTTP/1.1\r\nHost: www.example.org\r\nAccept-Encoding: gzip\r\nContent-Length: 75\r\nUser-Agent: Go-http-client/1.1\r\n\r\nGo is a general-purpose language designed with systems programming in mind."
  }
  
  func ExampleDumpRequestOut() {
  	const body = "Go is a general-purpose language designed with systems programming in mind."
  	req, err := http.NewRequest("PUT", "http://www.example.org", strings.NewReader(body))
  	if err != nil {
  		log.Fatal(err)
  	}
  
  	dump, err := httputil.DumpRequestOut(req, true)
  	if err != nil {
  		log.Fatal(err)
  	}
  
  	fmt.Printf("%q", dump)
  
  	// Output:
  	// "PUT / HTTP/1.1\r\nHost: www.example.org\r\nUser-Agent: Go-http-client/1.1\r\nContent-Length: 75\r\nAccept-Encoding: gzip\r\n\r\nGo is a general-purpose language designed with systems programming in mind."
  }
  
  func ExampleDumpResponse() {
  	const body = "Go is a general-purpose language designed with systems programming in mind."
  	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
  		w.Header().Set("Date", "Wed, 19 Jul 1972 19:00:00 GMT")
  		fmt.Fprintln(w, body)
  	}))
  	defer ts.Close()
  
  	resp, err := http.Get(ts.URL)
  	if err != nil {
  		log.Fatal(err)
  	}
  	defer resp.Body.Close()
  
  	dump, err := httputil.DumpResponse(resp, true)
  	if err != nil {
  		log.Fatal(err)
  	}
  
  	fmt.Printf("%q", dump)
  
  	// Output:
  	// "HTTP/1.1 200 OK\r\nContent-Length: 76\r\nContent-Type: text/plain; charset=utf-8\r\nDate: Wed, 19 Jul 1972 19:00:00 GMT\r\n\r\nGo is a general-purpose language designed with systems programming in mind.\n"
  }
  
  func ExampleReverseProxy() {
  	backendServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
  		fmt.Fprintln(w, "this call was relayed by the reverse proxy")
  	}))
  	defer backendServer.Close()
  
  	rpURL, err := url.Parse(backendServer.URL)
  	if err != nil {
  		log.Fatal(err)
  	}
  	frontendProxy := httptest.NewServer(httputil.NewSingleHostReverseProxy(rpURL))
  	defer frontendProxy.Close()
  
  	resp, err := http.Get(frontendProxy.URL)
  	if err != nil {
  		log.Fatal(err)
  	}
  
  	b, err := ioutil.ReadAll(resp.Body)
  	if err != nil {
  		log.Fatal(err)
  	}
  
  	fmt.Printf("%s", b)
  
  	// Output:
  	// this call was relayed by the reverse proxy
  }
  

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