golang http

http 掛載方法

• Head 發(fā)送 HEAD 請求

  func Head(url string) (resp *Response, err error)
  

• Get 發(fā)送 GET 請求

  func Get(url string) (resp *Response, err error)
  

  res, _ := http.Get("http://www.baidu.com")
  
    defer res.Body.Close()
  
    if res.StatusCode == 200 {
        buf, _ := ioutil.ReadAll(res.Body)
        fmt.Println(string(buf))
    }
  

• Post 發(fā)送 POST 請求

  func Post(url string, bodyType string, body io.Reader) (resp *Response, err error)
  

  url := "http://www.baidu.com"
    res, _ := http.Post(url, "json", nil)
    buf, _ := ioutil.ReadAll(res.Body)
    fmt.Println(string(buf))
  

• Handle 向 http.DefaultServeMax 注冊路由方法

  func Handle(pattern string, handler Handler)
  

type MyHandler string

func (m MyHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
  w.Write([]byte(m))
}

func main() {

  var msg MyHandler = "show me"
  http.Handle("/", msg)

  http.ListenAndServe(":8080", nil)
}

• HandleFunc 向 http.DefaultServeMax 注冊路由方法

  func HandleFunc(pattern string, handler func(ResponseWriter, *Request))
  

    http.HandleFunc("/user", func(w http.ResponseWriter, r *http.Request) {
        w.Write([]byte("hello Rogan"))
    })
  
    http.ListenAndServe(":8080", nil)
  
  

• Serve 開啟監(jiān)聽服務(wù), 服務(wù)底層接口

  func Serve(l net.Listener, handler Handler) error
  
  

• ListenAndServe 監(jiān)聽指定地址的 TCP 服務(wù), 既創(chuàng)建 tcp 服務(wù), Serve 的上層接口

  func ListenAndServe(addr string, handler Handler) error
  
  

  http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        w.Write([]byte("Hello"))
    })
  
    http.ListenAndServe(":8080", nil)
  
  

• ListenAndServeTLS 開啟 https 服務(wù)

  func ListenAndServeTLS(addr string, certFile string, keyFile string, handler Handler) error
  
  

• FileServer 開啟靜態(tài)資源服務(wù)

  func ServeFile(w ResponseWriter, r *Request, name string)
  
  

    http.Handle("/", http.FileServer(http.Dir("./")))
    http.ListenAndServe(":8080", nil)
  
  
  

• Redirect 重定向

  func Redirect(w ResponseWriter, r *Request, urlStr string, code int)
  
  
  

    http.HandleFunc("/product", func(w http.ResponseWriter, r *http.Request) {
        w.Write([]byte("to baidu"))
        http.Redirect(w, r, "http://www.baidu.com", 200)
    })
    http.ListenAndServe(":8080", nil)
  
  
  

• Error 回復(fù)指定錯誤

  func Error(w ResponseWriter, error string, code int)
  
  

  http.HandleFunc("/product", func(w http.ResponseWriter, r *http.Request) {
        http.Error(w, "服務(wù)器錯誤", 500)
    })
    http.ListenAndServe(":8080", nil)
  
  

• NotFound 返回404錯誤

  func NotFound(w ResponseWriter, r *Request)
  
  

  http.HandleFunc("/product", http.NotFound)
    http.ListenAndServe(":8080", nil)
  
  

• SetCookie 設(shè)置Cookie

  func SetCookie(w ResponseWriter, cookie *Cookie)
  
  

  http.HandleFunc("/product", func(w http.ResponseWriter, r *http.Request) {
  
        cookie := http.Cookie{
            Name:   "uId",
            Value:  "111",
            MaxAge: 100,
        }
        
           // 請求返回前設(shè)置 cookie
        http.SetCookie(w, &cookie)
        w.Write([]byte("設(shè)置 Cookie"))
  
    })
  
  

Server 服務(wù)器掛載方法

• serve 服務(wù)監(jiān)聽 與 http.Serve 一致
• ListenAndServe 開啟 TCP 服務(wù)
• ListenAndServeTLS 開啟 HTTPS 服務(wù)

Server 服務(wù)器屬性

• Addr tcp 地址
• Handler ServeMux 處理器
• ReadTImeout 讀取超時
• WriteTimeout 寫入超時
• MaxHeaderBytes 最大請求頭長度
• ConnState 設(shè)置日志記錄器
• ErrorLog 非導(dǎo)出字段

ServeMux 路由掛載函數(shù)

• NewServeMux 新建路由

  func NewServeMux() *ServeMux
  
  

• Handle 掛載處理器

  func (mux *ServeMux) Handle(pattern string, handler Handler)
  
  

• HandleFunc 掛載處理器

  func (mux *ServeMux) HandleFunc(pattern string, handler func(ResponseWriter, *Request))
  
  

• Handler 返回請求對應(yīng)的處理器

  func (mux *ServeMux) Handler(r *Request) (h Handler, pattern string)
  
  

• ServeHTTP 分發(fā)請求

  func (mux *ServeMux) ServeHTTP(w ResponseWriter, r *Request)
  
  

ServeMux and Server 簡單例子

router := http.NewServeMux()
    server := http.Server{}

    router.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {

        w.Write([]byte("home page"))

    })

    server.Addr = ":8080"
    server.Handler = router

    server.ListenAndServe()

Client 客戶端掛載方法

• Head 發(fā)送 Head 請求

  func (c *Client) Head(url string) (resp *Response, err error)
  
  

• Get 發(fā)送 GET 請求

  func (c *Client) Get(url string) (resp *Response, err error)
  
  

• Post 發(fā)送 POST 請求

  func (c *Client) Post(url string, bodyType string, body io.Reader) (resp *Response, err error)
  
  

• Do 通用請求方法

  func (c *Client) Do(req *Request) (resp *Response, err error)
  
  

    req, _ := http.NewRequest("GET", "http://www.baidu.com", nil)
    client := &http.Client{}
    res, _ := client.Do(req)
  
    defer res.Body.Close()
  
    data, _ := ioutil.ReadAll(res.Body)
  
    fmt.Println(string(data))
  
  

快捷Handler

• NotFoundHandler 404

  func NotFoundHandler() Handler
  
  

• RedirectHandler 重定向

  func RedirectHandler(url string, code int) Handler
  
  

• TimeoutHandler 超時