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// 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"
"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 := io.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.ReverseProxy{
Rewrite: func(r *httputil.ProxyRequest) {
r.SetXForwarded()
r.SetURL(rpURL)
},
})
defer frontendProxy.Close()
resp, err := http.Get(frontendProxy.URL)
if err != nil {
log.Fatal(err)
}
b, err := io.ReadAll(resp.Body)
if err != nil {
log.Fatal(err)
}
fmt.Printf("%s", b)
// Output:
// this call was relayed by the reverse proxy
}