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 := http.NewRequest("GET", "http://example.com", nil)
38 req.Header.Add("If-None-Match", `W/"wyzzy"`)
39 resp, err := client.Do(req)
42 For control over proxies, TLS configuration, keep-alives,
43 compression, and other settings, create a Transport:
45 tr := &http.Transport{
46 TLSClientConfig: &tls.Config{RootCAs: pool},
47 DisableCompression: true,
49 client := &http.Client{Transport: tr}
50 resp, err := client.Get("https://example.com")
52 Clients and Transports are safe for concurrent use by multiple
53 goroutines and for efficiency should only be created once and re-used.
55 ListenAndServe starts an HTTP server with a given address and handler.
56 The handler is usually nil, which means to use DefaultServeMux.
57 Handle and HandleFunc add handlers to DefaultServeMux:
59 http.Handle("/foo", fooHandler)
61 http.HandleFunc("/bar", func(w http.ResponseWriter, r *http.Request) {
62 fmt.Fprintf(w, "Hello, %q", html.EscapeString(r.URL.RawPath))
65 log.Fatal(http.ListenAndServe(":8080", nil))
67 More control over the server's behavior is available by creating a
75 MaxHeaderBytes: 1 << 20,
77 log.Fatal(s.ListenAndServe())