Go Language http request of receiving and processing code

. 1  Package main
 2  
. 3  Import (
 . 4      " encoding / JSON " 
. 5      " FMT " 
. 6      " github.com/julienschmidt/httprouter " 
. 7      " NET / HTTP " 
. 8  )
 . 9  
10  // the ResponseWriter three methods is an interface that has the Write WriteHeader Header method parameter response code 
. 11 FUNC the Hello (http.ResponseWriter W, R & lt * http.Request, P httprouter.Params) {
 12 is      fmt.Fprintf (W, " Hello,% S \ n- " , p.ByName ( " name "))
13 }
14 
15 //读取请求头
16 func headers(w http.ResponseWriter, r *http.Request) {
17     //map[Accept:[*/*] Accept-Encoding:[gzip, deflate, br]
18     // Cache-Control:[no-cache] Connection:[keep-alive] Content-Length:[42] Content-Type:[text/plain]
19     // Postman-Token:[9d84b4f5-1b43-411a-89c3-fbd9c34d199f] User-Agent:[PostmanRuntime/7.24.0]]
20     h := r.Header
21     fmt.Fprintln(w, h)
22 }
23 
24 //表单数据提交
25 func process(w http.ResponseWriter, r *http.Request) {
26     r.ParseForm ()
 27      fmt.Fprintln (w, r.Form) // the Map [the Hello: [Sau sheong] POST: [456]]
 28      // r.PostForm is the only form key-value pairs will not get back the key URL value 
29  }
 30  
31 is FUNC body (http.ResponseWriter W, R & lt * http.Request) {
 32      len: = r.ContentLength // Get the data length of the body 
33 is      body: the make = ([] byte , len)
 34 is      R & lt. Body.Read (body)
 35      fmt.Fprintln (W, len)
 36      fmt.Fprintln (W, String (body))
 37 [  }
 38 is  
39  // the ResponseWriter return json data 
40 
41 type Post struct {
42     User    string
43     Threads []string
44 }
45 
46 //向浏览器返回json数据
47 func jsonExample(w http.ResponseWriter, r *http.Request) {
48     w.Header().Set("Content-Type", "application/json")
49     post := &Post{
50         User:    "zhangsan",
51         Threads: []string{"NiHao " , " wohao " },
 52 is      }
 53 is      json, _: = json.Marshal (POST) // Json Marshal: The data is encoded into json string 
54 is      w.Write (json)
 55  }
 56 is  
57 is  // the browser transmitting Cookie 
58 FUNC the setCookie (http.ResponseWriter W, R & lt * http.Request) {
 59      C1: = http.Cookie {
 60          the Name:      " first_cookie " ,
 61 is          the Value:     " Go the Web Programming " ,
 62 is          the HttpOnly:true,
63     }
64     c2 := http.Cookie{
65         Name:     "second_cookie",
66         Value:    "Manning Programming",
67         HttpOnly: true,
68     }
69     //w.Header().Set("Set-Cookie",c1.String())
70     //w.Header().Add("Set-Cookie",c2.String())
71     http.SetCookie(w, &c1)
72     http.SetCookie(w, &c2) //三种设置cookie的方法
73 }
74 
75 //从浏览器获得cookie
76 func getCookie(w http.ResponseWriter, r *http.Request) {
77     h := r.Header["Cookie"]
78     cs := r.Cookies()
79     fmt.Fprintln(w, h)
80     fmt.Fprintln(w, cs)
81 }
82 
83 func main() {
84     //mux:=httprouter.New()
85     //mux.GET("/hello/:name",Hello)
86     //log.Fatal(http.ListenAndServe(":8080",mux))
87     //
88     //http.HandleFunc("/header",headers)
89     //http.HandleFunc("/body",body)
90     //http.HandleFunc("/process",process)
91     //http.HandleFunc("/json",jsonExample)
92     http.HandleFunc("/setcookie", setCookie)
93     http.HandleFunc("/getcookie", getCookie)
94 
95     http.ListenAndServe(":8080", nil)
96 
97 }