1 // Copyright 2011 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.
6 Package http provides HTTP client and server implementations.
8 Get, Head, Post, and PostForm make HTTP requests:
10 resp, err := http.Get("http://example.com/")
12 resp, err := http.Post("http://example.com/upload", "image/jpeg", &buf)
14 resp, err := http.PostForm("http://example.com/form",
15 url.Values{"key": {"Value"}, "id": {"123"}})
17 The client must close the response body when finished with it:
19 resp, err := http.Get("http://example.com/")
23 defer resp.Body.Close()
24 body, err := ioutil.ReadAll(resp.Body)
27 For control over HTTP client headers, redirect policy, and other
28 settings, create a Client:
30 client := &http.Client{
31 CheckRedirect: redirectPolicyFunc,
34 resp, err := client.Get("http://example.com")
37 req, err := http.NewRequest("GET", "http://example.com", nil)
39 req.Header.Add("If-None-Match", `W/"wyzzy"`)
40 resp, err := client.Do(req)
43 For control over proxies, TLS configuration, keep-alives,
44 compression, and other settings, create a Transport:
46 tr := &http.Transport{
47 TLSClientConfig: &tls.Config{RootCAs: pool},
48 DisableCompression: true,
50 client := &http.Client{Transport: tr}
51 resp, err := client.Get("https://example.com")
53 Clients and Transports are safe for concurrent use by multiple
54 goroutines and for efficiency should only be created once and re-used.
56 ListenAndServe starts an HTTP server with a given address and handler.
57 The handler is usually nil, which means to use DefaultServeMux.
58 Handle and HandleFunc add handlers to DefaultServeMux:
60 http.Handle("/foo", fooHandler)
62 http.HandleFunc("/bar", func(w http.ResponseWriter, r *http.Request) {
63 fmt.Fprintf(w, "Hello, %q", html.EscapeString(r.URL.Path))
66 log.Fatal(http.ListenAndServe(":8080", nil))
68 More control over the server's behavior is available by creating a
74 ReadTimeout: 10 * time.Second,
75 WriteTimeout: 10 * time.Second,
76 MaxHeaderBytes: 1 << 20,
78 log.Fatal(s.ListenAndServe())