github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/gmhttp/httputil/example_test.go (about)

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package httputil_test
     6  
     7  import (
     8  	"fmt"
     9  	"io"
    10  	"log"
    11  	"net/url"
    12  	"strings"
    13  
    14  	http "github.com/hxx258456/ccgo/gmhttp"
    15  	"github.com/hxx258456/ccgo/gmhttp/httptest"
    16  	"github.com/hxx258456/ccgo/gmhttp/httputil"
    17  )
    18  
    19  func ExampleDumpRequest() {
    20  	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    21  		dump, err := httputil.DumpRequest(r, true)
    22  		if err != nil {
    23  			http.Error(w, fmt.Sprint(err), http.StatusInternalServerError)
    24  			return
    25  		}
    26  
    27  		fmt.Fprintf(w, "%q", dump)
    28  	}))
    29  	defer ts.Close()
    30  
    31  	const body = "Go is a general-purpose language designed with systems programming in mind."
    32  	req, err := http.NewRequest("POST", ts.URL, strings.NewReader(body))
    33  	if err != nil {
    34  		log.Fatal(err)
    35  	}
    36  	req.Host = "www.example.org"
    37  	resp, err := http.DefaultClient.Do(req)
    38  	if err != nil {
    39  		log.Fatal(err)
    40  	}
    41  	defer resp.Body.Close()
    42  
    43  	b, err := io.ReadAll(resp.Body)
    44  	if err != nil {
    45  		log.Fatal(err)
    46  	}
    47  
    48  	fmt.Printf("%s", b)
    49  
    50  	// Output:
    51  	// "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."
    52  }
    53  
    54  func ExampleDumpRequestOut() {
    55  	const body = "Go is a general-purpose language designed with systems programming in mind."
    56  	req, err := http.NewRequest("PUT", "http://www.example.org", strings.NewReader(body))
    57  	if err != nil {
    58  		log.Fatal(err)
    59  	}
    60  
    61  	dump, err := httputil.DumpRequestOut(req, true)
    62  	if err != nil {
    63  		log.Fatal(err)
    64  	}
    65  
    66  	fmt.Printf("%q", dump)
    67  
    68  	// Output:
    69  	// "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."
    70  }
    71  
    72  func ExampleDumpResponse() {
    73  	const body = "Go is a general-purpose language designed with systems programming in mind."
    74  	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    75  		w.Header().Set("Date", "Wed, 19 Jul 1972 19:00:00 GMT")
    76  		fmt.Fprintln(w, body)
    77  	}))
    78  	defer ts.Close()
    79  
    80  	resp, err := http.Get(ts.URL)
    81  	if err != nil {
    82  		log.Fatal(err)
    83  	}
    84  	defer resp.Body.Close()
    85  
    86  	dump, err := httputil.DumpResponse(resp, true)
    87  	if err != nil {
    88  		log.Fatal(err)
    89  	}
    90  
    91  	fmt.Printf("%q", dump)
    92  
    93  	// Output:
    94  	// "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"
    95  }
    96  
    97  func ExampleReverseProxy() {
    98  	backendServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    99  		fmt.Fprintln(w, "this call was relayed by the reverse proxy")
   100  	}))
   101  	defer backendServer.Close()
   102  
   103  	rpURL, err := url.Parse(backendServer.URL)
   104  	if err != nil {
   105  		log.Fatal(err)
   106  	}
   107  	frontendProxy := httptest.NewServer(httputil.NewSingleHostReverseProxy(rpURL))
   108  	defer frontendProxy.Close()
   109  
   110  	resp, err := http.Get(frontendProxy.URL)
   111  	if err != nil {
   112  		log.Fatal(err)
   113  	}
   114  
   115  	b, err := io.ReadAll(resp.Body)
   116  	if err != nil {
   117  		log.Fatal(err)
   118  	}
   119  
   120  	fmt.Printf("%s", b)
   121  
   122  	// Output:
   123  	// this call was relayed by the reverse proxy
   124  }