{"id":91634,"date":"2026-08-08T08:08:59","date_gmt":"2026-08-08T00:08:59","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/91634.html"},"modified":"2026-08-08T08:08:59","modified_gmt":"2026-08-08T00:08:59","slug":"01-%e6%90%ad%e6%9c%8d%e5%8a%a1%e5%99%a8%ef%bc%9a%e5%a4%84%e7%90%86%e5%99%a8%e3%80%81%e8%b7%af%e7%94%b1%e8%a1%a8%e3%80%81%e8%af%bb%e8%af%b7%e6%b1%82%e5%8f%82%e6%95%b0%ef%bc%88%e7%bb%86%e8%ae%b2","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/91634.html","title":{"rendered":"01. \u642d\u670d\u52a1\u5668\uff1a\u5904\u7406\u5668\u3001\u8def\u7531\u8868\u3001\u8bfb\u8bf7\u6c42\u53c2\u6570\uff08\u7ec6\u8bb2\uff09"},"content":{"rendered":"

🥰\u4e2a\u4eba\u4e3b\u9875：\u4f1a\u7f16\u7a0b\u7684\u571f\u8c46（\u6b22\u8fce\u6765\u8bbf）\"\" 💎\u4f5c\u8005\u7b80\u4ecb：\u540e\u7aef\u5b66\u4e60\u8005 \u2744\ufe0f\u4e2a\u4eba\u4e13\u680f：\u6570\u636e\u7ed3\u6784\u4e0e\u7b97\u6cd5，\u6570\u636e\u5e93，leetcode \u2728\u90a3\u4e9b\u4f60\u4e00\u4e2a\u4eba\u8d70\u8fc7\u7684\u591c\u8def，\u7ec8\u5c06\u5316\u4f5c\u7167\u4eae\u672a\u6765\u7684\u5149<\/p>\n

\"\"\"\"\"\"<\/p>\n

\u5bf9\u5e94\u8bfe：\u642d\u5efa\u670d\u52a1\u5668\u3001HTTP \u534f\u8bae\u3001\u5904\u7406\u8bf7\u6c42\u3001\u7ed9\u5ba2\u6237\u7aef\u54cd\u5e94\u3001\u8bfb\u53c2\u6570（\u7ea6 5.4 \u8282\u91cd\u70b9） \u4ee3\u7801\u793a\u4f8b\u6765\u81ea\u00a0bookstore0612，\u8def\u5f84：C:\\\\Users\\\\zjl\\\\Projects\\\\goweb-bookstore<\/p>\n

\n

\u4e00\u3001\u6700\u5c0f\u53ef\u8fd0\u884c\u670d\u52a1\u5668（HelloWorld \u9010\u884c）<\/h3>\n

1.1 \u5b8c\u6574\u4ee3\u7801<\/h4>\n

package main<\/p>\n

import (
\n "fmt"
\n "net\/http"
\n)<\/p>\n

func hello(w http.ResponseWriter, r *http.Request) {
\n fmt.Fprintln(w, "Hello World")
\n}<\/p>\n

func main() {
\n http.HandleFunc("\/hello", hello)
\n http.ListenAndServe(":8080", nil)
\n}<\/p>\n

\u4fdd\u5b58\u4e3a\u00a0main.go，\u5728\u9879\u76ee\u6839\u6267\u884c：<\/p>\n

go run main.go<\/p>\n

\u6d4f\u89c8\u5668\u8bbf\u95ee\u00a0http:\/\/localhost:8080\/hello，\u9875\u9762\u663e\u793a\u00a0Hello World（\u540e\u9762\u53ef\u80fd\u591a\u4e00\u4e2a\u6362\u884c，\u6765\u81ea\u00a0Fprintln）\u3002<\/p>\n

1.2 \u9010\u884c\u89e3\u91ca<\/h4>\n\n\u884c\u4ee3\u7801\u542b\u4e49<\/tr>\n\n\n\n\n\n\n\n
1<\/td>\npackage main<\/td>\n\u53ef\u6267\u884c\u7a0b\u5e8f\u5fc5\u987b\u662f\u00a0main\u00a0\u5305<\/td>\n<\/tr>\n
4~5<\/td>\nimport "net\/http"<\/td>\n\u6807\u51c6\u5e93 HTTP \u5305，\u8def\u7531\u3001\u670d\u52a1\u5668\u3001Cookie \u90fd\u5728\u8fd9<\/td>\n<\/tr>\n
7~9<\/td>\nfunc hello(w, r)<\/td>\n\u5904\u7406\u5668\u51fd\u6570：\u5904\u7406\u4e00\u6b21\u8bf7\u6c42；\u56fa\u5b9a\u7b7e\u540d\u4e24\u4e2a\u53c2\u6570<\/td>\n<\/tr>\n
8<\/td>\nfmt.Fprintln(w, "Hello World")<\/td>\n\u5f80\u54cd\u5e94\u4f53\u5199\u6587\u672c；w\u00a0\u5b9e\u73b0\u4e86\u00a0io.Writer<\/td>\n<\/tr>\n
12<\/td>\nhttp.HandleFunc("\/hello", hello)<\/td>\n\u767b\u8bb0\u8def\u7531：\u8def\u5f84 \u2192 \u51fd\u6570（\u6ce8\u610f\u4f20\u7684\u662f\u51fd\u6570\u540d，\u4e0d\u662f\u00a0hello()）<\/td>\n<\/tr>\n
13<\/td>\nhttp.ListenAndServe(":8080", nil)<\/td>\n\u963b\u585e\u76d1\u542c 8080；nil\u00a0= \u4f7f\u7528\u9ed8\u8ba4\u8def\u7531\u8868<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

1.3 \u4e24\u4e2a\u6838\u5fc3\u7c7b\u578b<\/h4>\n

http.ResponseWriter（\u5e38\u540d\u00a0w）\u00a0\u2014 \u4ee3\u8868\u300c\u8fd9\u6b21\u8bf7\u6c42\u7684\u54cd\u5e94\u300d：<\/p>\n

    \n
  • \u5199\u72b6\u6001\u7801（\u9ed8\u8ba4 200）<\/li>\n
  • \u5199\u54cd\u5e94\u5934（w.Header().Set(…)）<\/li>\n
  • \u5199\u54cd\u5e94\u4f53（fmt.Fprintln(w,…)\u3001w.Write([]byte(…))）<\/li>\n<\/ul>\n

    http.Request（\u5e38\u540d\u00a0r）\u00a0\u2014 \u4ee3\u8868\u300c\u6d4f\u89c8\u5668\u53d1\u6765\u7684\u8fd9\u6b21\u8bf7\u6c42\u300d：<\/p>\n

      \n
    • URL\u3001Method（GET\/POST）<\/li>\n
    • \u8bf7\u6c42\u5934\u3001Cookie<\/li>\n
    • \u8bf7\u6c42\u4f53（POST \u8868\u5355\u3001JSON \u7b49）<\/li>\n<\/ul>\n

      1.4 \u5904\u7406\u5668\u51fd\u6570 = \u8bfe\u91cc\u7684\u300c\u5904\u7406\u8bf7\u6c42\u7684\u51fd\u6570\u300d<\/h4>\n

      \u4e66\u57ce\u9879\u76ee\u91cc\u6bcf\u4e00\u4e2a\u00a0controller.Login\u3001controller.AddBook2Cart\u00a0\u90fd\u662f\u8fd9\u79cd\u7b7e\u540d：<\/p>\n

      func Login(w http.ResponseWriter, r *http.Request) { … }<\/p>\n

      \u4e00\u6b21 HTTP \u8bf7\u6c42 \u2192 \u8c03\u7528\u4e00\u6b21\u5904\u7406\u5668\u51fd\u6570\u3002<\/p>\n

      \n

      \u4e8c\u3001\u4e09\u79cd\u6302\u6cd5：HandleFunc\u3001Handle\u3001ServeHTTP<\/h3>\n

      2.1 \u65b9\u5f0f\u4e00：HandleFunc \u2014\u2014 \u6302\u666e\u901a\u51fd\u6570（\u4e66\u57ce 99% \u7528\u6cd5）<\/h4>\n

      http.HandleFunc("\/login", controller.Login)<\/p>\n

        \n
      • \u7b2c\u4e00\u4e2a\u53c2\u6570：URL \u8def\u5f84（\u7cbe\u786e\u5339\u914d，\u8bfe\u91cc\u9636\u6bb5\u4e0d\u505a\u6b63\u5219）<\/li>\n
      • \u7b2c\u4e8c\u4e2a\u53c2\u6570：\u7b26\u5408\u00a0func(w,r)\u00a0\u7b7e\u540d\u7684\u51fd\u6570<\/li>\n<\/ul>\n

        \u5185\u90e8\u539f\u7406（\u4e86\u89e3\u5373\u53ef）：\u00a0HandleFunc\u00a0\u4f1a\u628a\u4f60\u7684\u51fd\u6570\u5305\u88c5\u6210\u4e00\u4e2a\u5b9e\u73b0\u4e86\u00a0ServeHTTP\u00a0\u7684\u5bf9\u8c61，\u518d\u6ce8\u518c\u5230 Mux\u3002<\/p>\n

        2.2 \u65b9\u5f0f\u4e8c：Handle \u2014\u2014 \u6302\u300c\u5bf9\u8c61\u300d<\/h4>\n

        type MyHandler struct{}<\/p>\n

        func (m *MyHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
        \n fmt.Fprintln(w, "\u6b63\u5728\u901a\u8fc7\u5904\u7406\u5668\u5904\u7406\u4f60\u7684\u8bf7\u6c42")
        \n}<\/p>\n

        func main() {
        \n myHandler := MyHandler{}
        \n http.Handle("\/", &myHandler) \/\/ \u6ce8\u518c\u7684\u662f\u6307\u9488 &myHandler
        \n http.ListenAndServe(":8080", nil)
        \n}<\/p>\n

        \u8981\u70b9：<\/p>\n\n\u7ec6\u8282\u8bf4\u660e<\/tr>\n\n\n\n\n
        \u65b9\u6cd5\u540d\u5fc5\u987b\u53eb\u00a0ServeHTTP<\/td>\n\u8fd9\u662f\u00a0http.Handler\u00a0\u63a5\u53e3\u89c4\u5b9a\u7684<\/td>\n<\/tr>\n
        \u6ce8\u518c\u65f6\u7528\u00a0&myHandler<\/td>\n\u6307\u9488\u63a5\u6536\u8005，\u907f\u514d\u62f7\u8d1d<\/td>\n<\/tr>\n
        Handle\u00a0\u4e0d\u662f\u7acb\u523b\u8c03\u7528<\/td>\n\u53ea\u662f\u767b\u8bb0；\u8bf7\u6c42\u6765\u4e86\u624d\u6267\u884c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        2.3 \u65b9\u5f0f\u4e09：ServeHTTP \u2014\u2014 \u63a5\u53e3\u672c\u8d28<\/h4>\n

        type Handler interface {
        \n ServeHTTP(ResponseWriter, *Request)
        \n}<\/p>\n

        \u8c01\u5b9e\u73b0\u4e86\u8fd9\u4e2a\u63a5\u53e3，\u8c01\u5c31\u53ef\u4ee5\u88ab\u00a0http.Handle(path, handler)\u00a0\u6ce8\u518c\u3002<\/p>\n

        \u5bf9\u6bd4\u8868：<\/p>\n\nAPI\u6ce8\u518c\u76ee\u6807\u5178\u578b\u573a\u666f<\/tr>\n\n\n\n\n
        HandleFunc(path, fn)<\/td>\n\u51fd\u6570<\/td>\n\u4e66\u57ce\u6240\u6709\u4e1a\u52a1\u5904\u7406\u5668<\/td>\n<\/tr>\n
        Handle(path, obj)<\/td>\n\u5b9e\u73b0\u4e86\u00a0Handler\u00a0\u7684\u5bf9\u8c61<\/td>\nhttp.FileServer\u3001http.StripPrefix\u00a0\u8fd4\u56de\u503c<\/td>\n<\/tr>\n
        \u76f4\u63a5\u5199\u00a0ServeHTTP<\/td>\n\u81ea\u5b9a\u4e49\u7c7b\u578b<\/td>\n\u8bfe\u91cc\u6f14\u793a\u3001\u6807\u51c6\u5e93\u5185\u90e8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        2.4 \u4e66\u57ce main.go \u91cc\u7684\u771f\u5b9e\u6ce8\u518c<\/h4>\n

        \/\/ \u9759\u6001\u8d44\u6e90：Handle + FileServer（FileServer \u672c\u8eab\u5b9e\u73b0\u4e86 Handler）
        \nhttp.Handle("\/static\/", http.StripPrefix("\/static\/", http.FileServer(http.Dir("views\/static"))))<\/p>\n

        \/\/ \u52a8\u6001\u4e1a\u52a1：HandleFunc + controller \u51fd\u6570
        \nhttp.HandleFunc("\/login", controller.Login)
        \nhttp.HandleFunc("\/addBook2Cart", controller.AddBook2Cart)<\/p>\n

        \u672c\u8d28\u90fd\u662f：URL \u2192 \u67d0\u79cd\u5904\u7406\u903b\u8f91\u3002<\/p>\n

        \n

        \u4e09\u3001\u8def\u7531\u8868 ServeMux \u2014\u2014 \u7528\u300c\u7535\u8bdd\u603b\u673a\u300d\u7c7b\u6bd4<\/h3>\n

        3.1 \u662f\u4ec0\u4e48<\/h4>\n

        \u8def\u7531\u8868（ServeMux）\u5c31\u662f\u4e00\u5f20\u00a0URL \u2192 \u5904\u7406\u5668\u00a0\u7684\u5bf9\u7167\u8868：<\/p>\n

        \/login \u2192 controller.Login
        \n\/regist \u2192 controller.Regist
        \n\/main \u2192 controller.GetPageBooksByPrice
        \n\/addBook2Cart \u2192 controller.AddBook2Cart
        \n…<\/p>\n

        \u7c7b\u6bd4：\u516c\u53f8\u603b\u673a\u3002\u5ba2\u6237\u62e8\u5206\u673a\u53f7（URL），\u603b\u673a\u67e5\u8868\u8f6c\u63a5\u5230\u5bf9\u5e94\u90e8\u95e8（\u5904\u7406\u5668）\u3002<\/p>\n

        3.2 DefaultServeMux（\u9ed8\u8ba4\u603b\u673a）<\/h4>\n

        http.HandleFunc("\/login", controller.Login)
        \nhttp.ListenAndServe(":8080", nil) \/\/ \u7b2c\u4e8c\u4e2a\u53c2\u6570 nil \u2192 \u7528 DefaultServeMux<\/p>\n

          \n
        • Go \u5728\u00a0net\/http\u00a0\u5305\u91cc\u9884\u7f6e\u4e86\u5168\u5c40\u53d8\u91cf\u00a0DefaultServeMux<\/li>\n
        • http.HandleFunc\u00a0\/\u00a0http.Handle\u00a0\u5b9e\u9645\u662f\u5f80\u00a0DefaultServeMux\u00a0\u4e0a\u6ce8\u518c<\/li>\n
        • \u4e00\u5f00\u59cb\u8868\u662f\u7a7a\u7684，\u6240\u6709\u4e1a\u52a1\u8def\u5f84\u90fd\u662f\u4f60\u81ea\u5df1\u6302\u4e0a\u53bb\u7684<\/li>\n
        • \u300c\u9ed8\u8ba4\u300d\u2260 \u5185\u7f6e\u4e86\u00a0\/login；\u53ea\u662f\u300c\u9ed8\u8ba4\u7528\u8fd9\u4e00\u5f20\u8868\u300d<\/li>\n<\/ul>\n

          3.3 NewServeMux（\u81ea\u5df1\u4e70\u4e00\u53f0\u603b\u673a）<\/h4>\n

          mux := http.NewServeMux()
          \nmux.HandleFunc("\/myMux", myHandler)
          \nhttp.ListenAndServe(":8080", mux) \/\/ \u5fc5\u987b\u4f20\u5165 mux，\u4e0d\u80fd nil<\/p>\n\n\u5199\u6cd5\u8def\u7531\u8868\u6548\u679c<\/tr>\n\n\n\n\n
          ListenAndServe(":8080", nil)<\/td>\nDefaultServeMux<\/td>\n\u7528\u5305\u7ea7\u00a0HandleFunc\u00a0\u6ce8\u518c\u7684\u90fd\u80fd\u547d\u4e2d<\/td>\n<\/tr>\n
          ListenAndServe(":8080", mux)<\/td>\n\u81ea\u5b9a\u4e49 mux<\/td>\n\u53ea\u6709\u00a0mux.HandleFunc\u00a0\u6ce8\u518c\u7684\u80fd\u547d\u4e2d<\/td>\n<\/tr>\n
          HandleFunc\u00a0+\u00a0ListenAndServe(…, mux)\u00a0\u6df7\u7528<\/td>\n\u5206\u88c2<\/td>\n\u6ce8\u518c\u5728 Default \u4e0a\u7684\u8def\u5f84\u5728\u81ea\u5b9a\u4e49 mux \u4e0a\u00a0404<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          \u4f55\u65f6\u6548\u679c\u4e0d\u540c（\u6613\u9519）：<\/p>\n

          http.HandleFunc("\/a", handlerA) \/\/ \u6ce8\u518c\u5728 DefaultServeMux
          \nmux := http.NewServeMux()
          \nmux.HandleFunc("\/b", handlerB)
          \nhttp.ListenAndServe(":8080", mux) \/\/ \u53ea\u6709 \/b \u6709\u6548，\/a \u4f1a 404！<\/p>\n

          \u4e66\u57ce\u8bfe\u91cc\u4e3a\u4e86\u8bb2\u6e05\u6982\u5ff5\u4f1a\u5199\u00a0NewServeMux；\u5165\u95e8\u9879\u76ee\u7528 DefaultServeMux + nil \u8db3\u591f，\u548c\u81ea\u5b9a\u4e49 mux \u5728\u300c\u53ea\u7528\u4e00\u4e2a\u8868\u300d\u65f6\u6548\u679c\u51e0\u4e4e\u4e00\u6837\u3002<\/p>\n

          3.4 \u8def\u5f84\u5339\u914d\u89c4\u5219（\u8bfe\u91cc\u5e38\u7528\u5b50\u96c6）<\/h4>\n
            \n
          • \u6ce8\u518c\u00a0\/static\/\u00a0\u8fd9\u79cd\u5e26\u5c3e\u90e8\u00a0\/\u00a0\u7684\u524d\u7f00，\u4f1a\u5339\u914d\u00a0\/static\/css\/style.css<\/li>\n
          • \u7cbe\u786e\u8def\u5f84\u5982\u00a0\/login\u00a0\u53ea\u5339\u914d\u00a0\/login（\u4e0d\u542b query：\/login?x=1\u00a0\u4ecd\u5339\u914d）<\/li>\n
          • \u6839\u8def\u5f84\u00a0\/\u00a0\u5728\u4e66\u57ce\u7528\u533f\u540d\u51fd\u6570\u5355\u72ec\u5904\u7406，\u907f\u514d\u62a2\u8d70\u6240\u6709 404<\/li>\n<\/ul>\n
            \n

            \u56db\u3001http.Server \u7ed3\u6784\u4f53（\u81ea\u5b9a\u4e49\u670d\u52a1\u5668）<\/h3>\n

            4.1 \u57fa\u672c\u5199\u6cd5<\/h4>\n

            import "time"<\/p>\n

            server := http.Server{
            \n Addr: ":8080", \/\/ \u76d1\u542c\u5730\u5740
            \n Handler: nil, \/\/ nil \u5219\u5185\u90e8\u7528 DefaultServeMux
            \n ReadTimeout: 5 * time.Second,
            \n WriteTimeout: 10 * time.Second,
            \n IdleTimeout: 120 * time.Second,
            \n}
            \nserver.ListenAndServe()<\/p>\n

            4.2 \u5e38\u7528\u5b57\u6bb5<\/h4>\n\n\u5b57\u6bb5\u4f5c\u7528<\/tr>\n\n\n\n\n\n\n
            Addr<\/td>\n\u5982\u00a0:8080\u3001127.0.0.1:8080<\/td>\n<\/tr>\n
            Handler<\/td>\n\u6839\u5904\u7406\u5668，\u901a\u5e38\u662f\u00a0nil\u3001*ServeMux\u00a0\u6216\u81ea\u5b9a\u4e49\u00a0Handler<\/td>\n<\/tr>\n
            ReadTimeout<\/td>\n\u8bfb\u6574\u4e2a\u8bf7\u6c42（\u542b body）\u7684\u6700\u957f\u65f6\u95f4<\/td>\n<\/tr>\n
            WriteTimeout<\/td>\n\u5199\u54cd\u5e94\u7684\u6700\u957f\u65f6\u95f4<\/td>\n<\/tr>\n
            IdleTimeout<\/td>\nHTTP\/1.1 keep-alive \u7a7a\u95f2\u8fde\u63a5\u8d85\u65f6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            4.3 \u81f4\u547d\u6613\u9519\u70b9<\/h4>\n

            server := http.Server{
            \n Addr: ":8080",
            \n Handler: myMux,
            \n ReadTimeout: 2 * time.Second,
            \n}
            \n\/\/ \u9519：\u8fd9\u6837 ListenAndServe \u4e0d\u4f1a\u7528\u5230\u4e0a\u9762 server \u7684\u914d\u7f6e！
            \nhttp.ListenAndServe(":8080", nil)<\/p>\n

            \/\/ \u5bf9：\u5fc5\u987b\u8c03\u5b9e\u4f8b\u65b9\u6cd5
            \nserver.ListenAndServe()<\/p>\n

            \u89c4\u5219：\u00a0\u914d\u4e86\u00a0http.Server{…}\u00a0\u5c31\u5fc5\u987b\u00a0server.ListenAndServe()，\u5426\u5219\u81ea\u5b9a\u4e49 Handler\u3001\u8d85\u65f6\u00a0\u5168\u90e8\u4e0d\u751f\u6548\u3002<\/p>\n

            \u4e66\u57ce\u5b8c\u6574\u7248\u4e3a\u7b80\u6d01\u76f4\u63a5\u7528：<\/p>\n

            http.ListenAndServe(":8080", nil)<\/p>\n

            \n

            \u4e94\u3001HTTP \u62a5\u6587\u89e3\u5256（\u5e26\u4e66\u57ce\u767b\u5f55\u5b9e\u4f8b）<\/h3>\n

            5.1 \u8bf7\u6c42\u62a5\u6587（\u6d4f\u89c8\u5668 \u2192 \u670d\u52a1\u5668）<\/h4>\n

            \u4ee5\u767b\u5f55 POST \u4e3a\u4f8b：<\/p>\n

            POST \/login HTTP\/1.1 \u2190 \u8bf7\u6c42\u884c：\u65b9\u6cd5 + \u8def\u5f84 + \u534f\u8bae\u7248\u672c
            \nHost: localhost:8080 \u2190 \u8bf7\u6c42\u5934\u5f00\u59cb
            \nUser-Agent: Mozilla\/5.0 …
            \nAccept: text\/html,application\/xhtml+xml,…
            \nContent-Type: application\/x-www-form-urlencoded
            \nContent-Length: 32
            \nCookie: user=abc-def-ghi \u2190 \u82e5\u4e4b\u524d\u767b\u5f55\u8fc7，\u4f1a\u5e26\u4e0a<\/p>\n

            username=admin&password=123456 \u2190 \u7a7a\u884c\u540e\u662f\u8bf7\u6c42\u4f53（POST \u8868\u5355）<\/p>\n\n\u90e8\u5206\u5185\u5bb9\u5728 Go \u91cc\u600e\u4e48\u8bfb<\/tr>\n\n\n\n\n
            \u8bf7\u6c42\u884c<\/td>\nPOST \/login HTTP\/1.1<\/td>\nr.Method\u00a0r.URL.Path<\/td>\n<\/tr>\n
            \u8bf7\u6c42\u5934<\/td>\nHost\u3001Content-Type\u3001Cookie\u2026<\/td>\nr.Header\u00a0r.Cookie("user")<\/td>\n<\/tr>\n
            \u8bf7\u6c42\u4f53<\/td>\nusername=admin&password=123456<\/td>\nParseForm\u00a0\u540e\u00a0PostForm\u00a0\/\u00a0PostFormValue<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            GET \u793a\u4f8b（\u9996\u9875\u7ffb\u9875）：<\/p>\n

            GET \/main?pageNo=2&min=10&max=50 HTTP\/1.1
            \nHost: localhost:8080<\/p>\n

            \u53c2\u6570\u5728\u00a0URL query，\u4e0d\u5728 body；\u7528\u00a0r.FormValue("pageNo")\u00a0\u6216\u00a0r.URL.Query().Get("pageNo")\u3002<\/p>\n

            5.2 \u54cd\u5e94\u62a5\u6587（\u670d\u52a1\u5668 \u2192 \u6d4f\u89c8\u5668）<\/h4>\n

            \u767b\u5f55\u6210\u529f\u65f6\u5927\u81f4\u5982\u4e0b：<\/p>\n

            HTTP\/1.1 200 OK \u2190 \u72b6\u6001\u884c
            \nContent-Type: text\/html; charset=utf-8
            \nSet-Cookie: user=c65d2a76-9447-44cc-…; Path=\/; HttpOnly
            \nDate: …<\/p>\n

            <!DOCTYPE html> \u2190 \u54cd\u5e94\u4f53（HTML）
            \n<html>…<\/html><\/p>\n\n\u72b6\u6001\u7801\u542b\u4e49\u4e66\u57ce\u7528\u6cd5<\/tr>\n\n\n\n\n\n
            200<\/td>\nOK<\/td>\n\u6b63\u5e38\u8fd4\u56de HTML \/ JSON<\/td>\n<\/tr>\n
            302<\/td>\nFound<\/td>\nhttp.Redirect(w,r,"\/main",http.StatusFound)<\/td>\n<\/tr>\n
            404<\/td>\nNot Found<\/td>\nhttp.NotFound(w,r)<\/td>\n<\/tr>\n
            401<\/td>\nUnauthorized<\/td>\n\u6539\u8d2d\u7269\u8f66\u6570\u91cf\u672a\u767b\u5f55\u65f6\u00a0http.Error(…, 401)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            5.3 \u5904\u7406\u5668\u91cc\u5199\u54cd\u5e94\u7684\u51e0\u79cd\u65b9\u5f0f<\/h4>\n

            \/\/ 1. \u7eaf\u6587\u672c
            \nfmt.Fprintln(w, "Hello")
            \nw.Write([]byte("\u8bf7\u5148\u767b\u5f55！"))<\/p>\n

            \/\/ 2. \u8df3\u8f6c
            \nhttp.Redirect(w, r, "\/main", http.StatusFound)<\/p>\n

            \/\/ 3. HTML \u6a21\u677f（\u4e66\u57ce\u4e3b\u6d41）
            \nt := template.Must(template.ParseFiles("views\/pages\/user\/login.html"))
            \nt.Execute(w, data)<\/p>\n

            \/\/ 4. JSON（\u52a0\u8d2d Ajax）
            \nw.Header().Set("Content-Type", "application\/json; charset=utf-8")
            \njson.NewEncoder(w).Encode(map[string]interface{}{"ok": true, "msg": "…"})<\/p>\n

            \u6ce8\u610f：\u00a0\u82e5\u624b\u52a8\u00a0WriteHeader(404)，\u987b\u5728\u00a0\u4efb\u4f55 body \u5199\u5165\u4e4b\u524d\u00a0\u8c03\u7528\u3002<\/p>\n

            \n

            \u516d\u3001\u8bfb\u8bf7\u6c42\u53c2\u6570（\u8bfe 5.4 \u91cd\u70b9 + hanzong\/admin \u5b9e\u9a8c）<\/h3>\n

            6.1 \u5b9e\u9a8c HTML（\u8bfe\u5185\u7ecf\u5178）<\/h4>\n

            <form action="http:\/\/localhost:8080\/getBody" method="POST">
            \n \u7528\u6237\u540d：<input type="text" name="username" value="hanzong"><br\/>
            \n \u5bc6\u7801：<input type="password" name="password" value="666666"><br\/>
            \n <input type="submit">
            \n<\/form><\/p>\n

            \u82e5\u6d4f\u89c8\u5668\u5730\u5740\u680f\u6216 form \u7684 action \u540c\u65f6\u5e26 query：<\/p>\n

            http:\/\/localhost:8080\/getBody?username=admin<\/p>\n

            \u5219\u00a0\u540c\u4e00\u6b21 POST\u00a0\u91cc：<\/p>\n

              \n
            • URL \u4e0a\u6709\u00a0username=admin<\/li>\n
            • \u8868\u5355 body \u91cc\u6709\u00a0username=hanzong&password=666666<\/li>\n<\/ul>\n

              6.2 \u56db\u79cd\u5bb9\u5668 API<\/h4>\n

              \u2460\u00a0r.Form\u00a0\u2014 URL + \u8868\u5355 body \u90fd\u8981<\/h5>\n

              r.ParseForm() \/\/ \u5fc5\u987b\u5148\u89e3\u6790！
              \nfmt.Fprintln(w, r.Form)
              \n\/\/ \u8f93\u51fa\u7c7b\u4f3c：map[username:[hanzong admin] password:[666666]]<\/p>\n

              \u987a\u5e8f\u89c4\u5219：\u00a0\u540c\u4e00 key \u591a\u4e2a\u503c\u65f6，\u8868\u5355\u5728\u524d，URL query \u5728\u540e（slice \u91cc\u00a0hanzong\u00a0\u5728\u00a0admin\u00a0\u524d\u9762）\u3002<\/p>\n

              \u5185\u5b58\u793a\u610f：<\/p>\n

              r.Form["username"] \u2192 []string{"hanzong", "admin"}
              \n \u2191 PostForm \u6765\u7684 \u2191 URL \u6765\u7684<\/p>\n

              \u2461\u00a0r.PostForm\u00a0\u2014 \u53ea\u8981 POST body \u91cc\u7684\u8868\u5355<\/h5>\n

              r.ParseForm()
              \nfmt.Fprintln(w, r.PostForm)
              \n\/\/ map[username:[hanzong] password:[666666]] \u2190 \u6ca1\u6709 admin<\/p>\n

              \u2462\u00a0r.FormValue("username")\u00a0\u2014 \u5feb\u6377\u53d6\u300c\u7b2c\u4e00\u4e2a\u503c\u300d<\/h5>\n

              \/\/ \u5185\u90e8\u4f1a\u81ea\u52a8 ParseForm
              \nv := r.FormValue("username") \/\/ "hanzong"（\u8868\u5355\u4f18\u5148\u4e8e URL \u7684\u7b2c\u4e00\u4e2a）<\/p>\n

              \u2463\u00a0r.PostFormValue("username")\u00a0\u2014 \u53ea\u8ba4 body<\/h5>\n

              v := r.PostFormValue("username") \/\/ "hanzong"
              \nv := r.PostFormValue("password") \/\/ "666666"<\/p>\n

              \u4e66\u57ce\u767b\u5f55（controller\/userhandler.go）：<\/p>\n

              username := r.PostFormValue("username")
              \npassword := r.PostFormValue("password")
              \nuser, _ := dao.CheckUserNameAndPassword(username, password)<\/p>\n

              \u4e3a\u4ec0\u4e48\u767b\u5f55\u7528\u00a0PostFormValue？\u5bc6\u7801\u53ea\u5e94\u4ece POST body \u6765，\u907f\u514d\u6709\u4eba\u6784\u9020\u00a0GET \/login?password=xxx\u00a0\u6df7\u8fdb\u53c2\u6570\u3002<\/p>\n

              6.3 \u5bf9\u6bd4\u603b\u8868<\/h4>\n\nAPI\u6570\u636e\u6765\u6e90\u662f\u5426\u81ea\u52a8 Parse\u8fd4\u56de\u503c\u4e66\u57ce\u573a\u666f<\/tr>\n\n\n\n\n\n\n
              ParseForm()<\/td>\n\u524d\u63d0<\/td>\n\u2014<\/td>\nerror<\/td>\n\u7528 Form\/PostForm \u524d\u5fc5\u8c03<\/td>\n<\/tr>\n
              r.Form<\/td>\nURL + body<\/td>\n\u5426<\/td>\nmap[string][]string<\/td>\n\u8c03\u8bd5\u3001\u591a\u503c<\/td>\n<\/tr>\n
              r.PostForm<\/td>\n\u4ec5 body<\/td>\n\u5426<\/td>\nmap[string][]string<\/td>\n\u533a\u5206 URL\/\u8868\u5355<\/td>\n<\/tr>\n
              FormValue(k)<\/td>\nURL + body<\/td>\n\u662f<\/td>\n\u7b2c\u4e00\u4e2a string<\/td>\n\u52a0\u8d2d\u00a0bookId\u3001\u5220\u4e66\u00a0id<\/td>\n<\/tr>\n
              PostFormValue(k)<\/td>\n\u4ec5 body<\/td>\n\u662f<\/td>\nstring<\/td>\n\u767b\u5f55\u3001\u6ce8\u518c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              6.4 Content-Type \u9650\u5236<\/h4>\n

              \u4e0a\u8ff0\u00a0Form\u00a0\/\u00a0PostForm\u00a0\u9ed8\u8ba4\u9488\u5bf9：<\/p>\n

              Content-Type: application\/x-www-form-urlencoded<\/p>\n

              \u4e0a\u4f20\u6587\u4ef6\u00a0\u65f6\u662f\u00a0multipart\/form-data，\u9700：<\/p>\n

              r.ParseMultipartForm(maxMemory)
              \nr.MultipartForm.File["myfile"]<\/p>\n

              \u4e66\u57ce\u8bfe\u9636\u6bb5\u51e0\u4e4e\u90fd\u662f urlencoded，\u77e5\u9053\u5373\u53ef\u3002<\/p>\n

              6.5 Ajax \u4e0e\u8868\u5355\u7684\u4e00\u81f4\u6027<\/h4>\n

              \u6ce8\u518c\u9875 Ajax \u6821\u9a8c（\/checkUserName）：<\/p>\n

              $.post("\/checkUserName", {"username": username}, function(data){ … });<\/p>\n

              \u540e\u7aef：<\/p>\n

              username := r.PostFormValue("username")<\/p>\n

              jQuery \u7684\u00a0$.post\u00a0\u4f1a\u628a\u5bf9\u8c61\u7f16\u6210\u00a0POST body，\u548c form \u7684\u00a0name="username"\u00a0\u672c\u8d28\u76f8\u540c\u3002<\/p>\n

              \u52a0\u8d2d（views\/index.html）：<\/p>\n

              $.post("\/addBook2Cart", {"bookId": bookId}, …);<\/p>\n

              \u540e\u7aef：<\/p>\n

              bookID := r.FormValue("bookId")<\/p>\n

              \u8fd9\u91cc\u7528\u00a0FormValue\u00a0\u4e5f\u884c，\u56e0\u4e3a Ajax \u53ea\u6709 body\u3001\u6ca1\u6709\u51b2\u7a81 URL \u53c2\u6570\u3002<\/p>\n

              \n

              \u4e03\u3001\u9759\u6001\u8d44\u6e90 FileServer（\u4e66\u57ce main.go）<\/h3>\n

              7.1 \u6ce8\u518c\u4ee3\u7801<\/h4>\n

              http.Handle("\/static\/", http.StripPrefix("\/static\/", http.FileServer(http.Dir("views\/static"))))
              \nhttp.Handle("\/pages\/", http.StripPrefix("\/pages\/", http.FileServer(http.Dir("views\/pages"))))<\/p>\n

              7.2 \u8bf7\u6c42\u5982\u4f55\u6620\u5c04\u5230\u78c1\u76d8<\/h4>\n\n\u6d4f\u89c8\u5668\u8bf7\u6c42StripPrefix \u540e\u78c1\u76d8\u8def\u5f84<\/tr>\n\n\n\n
              \/static\/css\/style.css<\/td>\ncss\/style.css<\/td>\nviews\/static\/css\/style.css<\/td>\n<\/tr>\n
              \/pages\/user\/login.html<\/td>\nuser\/login.html<\/td>\nviews\/pages\/user\/login.html<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              7.3 \u9010\u5c42\u7406\u89e3<\/h4>\n

              http.FileServer(http.Dir("views\/static"))
              \n \u2192 \u5b9e\u73b0\u4e86 Handler，\u6309 URL \u8def\u5f84\u8bfb\u672c\u5730\u6587\u4ef6<\/p>\n

              http.StripPrefix("\/static\/", …)
              \n \u2192 \u53bb\u6389 URL \u524d\u7f00，\u5426\u5219\u4f1a\u628a \/static\/ \u4e5f\u5f53\u6210\u76ee\u5f55\u540d<\/p>\n

              http.Handle("\/static\/", …)
              \n \u2192 \u6302\u5230 DefaultServeMux<\/p>\n

              7.4 login.html \u5982\u4f55\u5f15\u7528\u9759\u6001\u8d44\u6e90<\/h4>\n

              <link rel="stylesheet" href="\/static\/css\/style.css">
              \n<script src="\/static\/script\/jquery-1.7.2.js"><\/script><\/p>\n

              \u6d4f\u89c8\u5668\u4f1a\u00a0\u518d\u53d1 GET \u8bf7\u6c42\u00a0\u62c9 css\/js，\u7531 FileServer \u5904\u7406，\u4e0d\u7ecf\u8fc7\u00a0controller\u3002<\/p>\n

              7.5 \u6613\u9519\u70b9<\/h4>\n\n\u95ee\u9898\u539f\u56e0<\/tr>\n\n\n\n\n
              css 404<\/td>\ngo run\u00a0\u5de5\u4f5c\u76ee\u5f55\u4e0d\u5728\u9879\u76ee\u6839，views\/static\u00a0\u627e\u4e0d\u5230<\/td>\n<\/tr>\n
              \u8def\u5f84\u591a\/\u5c11\u4e00\u5c42<\/td>\nStripPrefix\u00a0\u4e0e\u00a0Handle\u00a0\u524d\u7f00\u4e0d\u4e00\u81f4<\/td>\n<\/tr>\n
              \u52a8\u6001\u9875\u4e5f\u60f3\u8d70 FileServer<\/td>\n\u5e26\u00a0{{.}}\u00a0\u7684\u6a21\u677f\u5fc5\u987b\u7528\u00a0template.Execute，\u4e0d\u80fd\u5f53\u7eaf\u9759\u6001<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
              \n

              \u516b\u3001action \u5982\u4f55\u8fde\u5230 handler（\u524d\u540e\u7aef\u95ed\u73af）<\/h3>\n

              8.1 \u4e09\u6b65\u5bf9\u5e94\u5173\u7cfb<\/h4>\n

              HTML form action="\/login"
              \n \u2195 \u8def\u5f84\u5b57\u7b26\u4e32\u5fc5\u987b\u4e00\u81f4
              \nmain.go http.HandleFunc("\/login", controller.Login)
              \n \u2195 \u51fd\u6570\u540d
              \ncontroller\/userhandler.go func Login(w,r) { … }<\/p>\n

              8.2 \u767b\u5f55\u5b8c\u6574\u95ed\u73af<\/h4>\n

              \u524d\u7aef（views\/pages\/user\/login.html）：<\/p>\n

              <form action="\/login" method="POST">
              \n <input name="username" … \/>
              \n <input name="password" type="password" … \/>
              \n <input type="submit" value="\u767b\u5f55" \/>
              \n<\/form><\/p>\n

              \u8def\u7531（main.go）：<\/p>\n

              http.HandleFunc("\/login", controller.Login)<\/p>\n

              \u540e\u7aef（controller\/userhandler.go）：<\/p>\n

              func Login(w http.ResponseWriter, r *http.Request) {
              \n username := r.PostFormValue("username") \/\/ \u5bf9\u5e94 name="username"
              \n password := r.PostFormValue("password") \/\/ \u5bf9\u5e94 name="password"
              \n \/\/ …
              \n}<\/p>\n

              8.3 \u5bf9\u5e94\u5173\u7cfb\u8868<\/h4>\n\n\u524d\u7aef\u540e\u7aef<\/tr>\n\n\n\n\n\n
              action="\/login"<\/td>\nHandleFunc("\/login", …)<\/td>\n<\/tr>\n
              method="POST"<\/td>\n\u53c2\u6570\u5728 body \u2192\u00a0PostFormValue<\/td>\n<\/tr>\n
              name="username"<\/td>\nPostFormValue("username")<\/td>\n<\/tr>\n
              \u70b9\u51fb submit<\/td>\n\u6d4f\u89c8\u5668\u53d1 HTTP POST，\u670d\u52a1\u5668\u8c03\u4e00\u6b21\u00a0Login<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              \u5173\u952e\u6982\u5ff5：\u00a0\u8868\u5355 HTML\u00a0\u4e0d\u662f\u00a0\u8bf7\u6c42\u4f53；\u7528\u6237\u70b9\u63d0\u4ea4\u540e，\u6d4f\u89c8\u5668\u00a0\u6839\u636e\u00a0action\/method\/name\u00a0\u6253\u5305\u00a0\u6210 HTTP \u8bf7\u6c42\u4f53\u3002<\/p>\n

              8.4 \u4e0e Ajax \u8def\u5f84\u4e00\u81f4<\/h4>\n

              $.post("\/addBook2Cart", {"bookId": bookId}, …);<\/p>\n

              http.HandleFunc("\/addBook2Cart", controller.AddBook2Cart)<\/p>\n

              \/addBook2Cart\u00a0\u5b57\u7b26\u4e32\u4e09\u5904（JS\u3001main\u3001\u6ce8\u91ca）\u5fc5\u987b\u4e00\u81f4，\u5dee\u4e00\u4e2a\u5b57\u6bcd\u5c31 404\u3002<\/p>\n

              \n

              \u4e5d\u3001\u5e38\u89c1\u6613\u9519\u70b9<\/h3>\n\n#\u6613\u9519\u70b9\u540e\u679c\u6b63\u786e\u505a\u6cd5<\/tr>\n\n\n\n\n\n\n\n\n\n
              1<\/td>\nHandleFunc("\/login", Login())\u00a0\u52a0\u4e86\u62ec\u53f7<\/td>\n\u7f16\u8bd1\u9519\u8bef\u6216\u903b\u8f91\u9519\u4e71<\/td>\n\u4f20\u00a0Login\u00a0\u4e0d\u662f\u00a0Login()<\/td>\n<\/tr>\n
              2<\/td>\n\u7528 Form \u5374\u5fd8\u8bb0\u00a0ParseForm<\/td>\n\u7a7a map<\/td>\n\u6216\u7528\u00a0FormValue\u00a0\u81ea\u52a8 Parse<\/td>\n<\/tr>\n
              3<\/td>\n\u767b\u5f55\u7528\u00a0FormValue\u00a0\u88ab URL \u53c2\u6570\u6c61\u67d3<\/td>\n\u5b89\u5168\/\u903b\u8f91\u95ee\u9898<\/td>\n\u654f\u611f\u5b57\u6bb5\u7528\u00a0PostFormValue<\/td>\n<\/tr>\n
              4<\/td>\nListenAndServe\u00a0\u4e0e\u00a0http.Server\u00a0\u6df7\u7528<\/td>\n\u8d85\u65f6\u4e0d\u751f\u6548<\/td>\n\u4e8c\u9009\u4e00，\u914d Server \u5c31\u00a0server.ListenAndServe()<\/td>\n<\/tr>\n
              5<\/td>\nDefaultServeMux \u4e0e\u81ea\u5b9a\u4e49 mux \u6df7\u6ce8\u518c<\/td>\n\u90e8\u5206\u8def\u7531 404<\/td>\n\u53ea\u7528\u4e00\u4e2a\u8868<\/td>\n<\/tr>\n
              6<\/td>\nFileServer \u5fd8\u8bb0 StripPrefix<\/td>\n404<\/td>\n\u524d\u7f00\u6210\u5bf9\u5199<\/td>\n<\/tr>\n
              7<\/td>\naction \u5199\u6210\u00a0\/Login\u00a0\u5927\u5c0f\u5199<\/td>\n404<\/td>\nGo \u8def\u5f84\u5927\u5c0f\u5199\u654f\u611f<\/td>\n<\/tr>\n
              8<\/td>\n\u5728 Write \u4e4b\u540e SetHeader<\/td>\n\u5934\u65e0\u6548<\/td>\n\u5148 Header \u518d Write<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
              \n

              \u5341\u3001Mini FAQ<\/h3>\n

              Q1：HandleFunc\u00a0\u548c\u00a0Handle\u00a0\u9009\u54ea\u4e2a？ A：\u4e1a\u52a1\u903b\u8f91\u7528\u00a0HandleFunc；\u6807\u51c6\u5e93\u63d0\u4f9b\u7684\u00a0FileServer\u00a0\u7b49\u5df2\u662f\u00a0Handler，\u7528\u00a0Handle\u3002<\/p>\n

              Q2：\u4e3a\u4ec0\u4e48 ListenAndServe \u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f nil？ A：nil \u8868\u793a\u4f7f\u7528\u00a0DefaultServeMux，\u4e0e\u524d\u9762\u00a0http.HandleFunc\u00a0\u914d\u5957\u3002<\/p>\n

              Q3：GET \u548c POST \u53c2\u6570\u90fd\u7528 FormValue \u884c\u5417？ A：\u53ef\u4ee5，GET \u7684 query \u548c POST \u7684 body \u90fd\u80fd\u53d6；\u4f46\u767b\u5f55\u5bc6\u7801\u8bf7\u7528\u00a0PostFormValue\u3002<\/p>\n

              Q4：r.Form["username"][0]\u00a0\u548c FormValue \u533a\u522b？ A：FormValue \u53d6\u7b2c\u4e00\u4e2a；Form \u66b4\u9732\u5168\u90e8\u503c，\u9002\u5408 debug\u3002<\/p>\n

              Q5：\u5904\u7406\u5668\u91cc\u80fd\u8bfb\u51e0\u6b21 body \u5417？ A：body \u662f\u6d41，\u4e00\u822c\u53ea\u80fd\u8bfb\u4e00\u6b21；ParseForm\u00a0\u4f1a\u8bfb\u5e76\u7f13\u5b58\u5230 Form\/PostForm\u3002<\/p>\n

              Q6：\u7aef\u53e3\u88ab\u5360\u7528\u600e\u4e48\u529e？ A：\u6539\u00a0:8080\u00a0\u4e3a\u00a0:8081，\u6216\u5173\u95ed\u5360\u7528 8080 \u7684\u8fdb\u7a0b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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