英文:
r.From["username"] giving empty values
问题
我已经使用golang编写了一个小型的Web应用程序。
> go version go1.7.4 linux/amd64
Go代码：
r.ParseForm()// 登录逻辑部分fmt.Println("用户名:", r.Form["username"])fmt.Println("密码:", r.Form["password"])
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-html -->
HTML模板<body><div class="container"><h1>登录</h1><form action="/login" method="POST"><div class="form-group"><label for="username">用户名</label><input type="text" class="form-control" name="username" placeholder="请输入用户名"></div><div class="form-group"><label for="password">密码</label><input type="password" class="form-control" name="password" placeholder="请输入密码"></div><button type="submit" class="btn btn-success">登录</button></form></div></body>
<!-- end snippet -->
当我使用以下代码打印时：
requestbody, _ := ioutil.ReadAll(r.Body)log.Println("请求体是", string(requestbody))
它会打印出正确的值，包括输入的用户名和密码。
但是当我尝试使用r.Form打印时，它会给出空值。
这种方法有什么问题吗？
func loginHandler(w http.ResponseWriter, r *http.Request) {log.Println("loginHandler")log.Println("请求URL是", r.RequestURI)log.Println("请求方法是", r.Method)requestbody, _ := ioutil.ReadAll(r.Body)log.Println("请求体是", string(requestbody))if r.Method == "POST" {r.ParseForm()// 登录逻辑部分fmt.Println("用户名:", r.Form["username"])fmt.Println("密码:", r.Form["password"])us, err := globalSessions.SessionStart(w, r)if err != nil {http.Error(w, err.Error(), http.StatusInternalServerError)return}w.Header().Set("Location", "/auth")w.WriteHeader(http.StatusFound)return}outputHTML(w, r, "static/login.html")}
英文:
I have written an small web app using golang
> go version go1.7.4 linux/amd64
Go Code:
r.ParseForm()// logic part of log infmt.Println("username:", r.Form["username"])fmt.Println("password:", r.Form["password"])
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-html -->
HTML template<body><div class="container"><h1>Login In</h1><form action="/login" method="POST"><div class="form-group"><label for="username">User Name</label><input type="text" class="form-control" name="username" placeholder="Please enter your user name"></div><div class="form-group"><label for="password">Password</label><input type="password" class="form-control" name="password" placeholder="Please enter your password"></div><button type="submit" class="btn btn-success">Login</button></form></div></body>
<!-- end snippet -->
When I am printing using
requestbody, _ := ioutil.ReadAll(r.Body)log.Println("request body is", string(requestbody))
it's printing correct values along with entered username and password.
But when I tried to print it using r.Form it's giving empty value.
Is anything wrong in this approach?
func loginHandler(w http.ResponseWriter, r *http.Request) {log.Println("loginHandler")log.Println("request url is", r.RequestURI)log.Println("request method", r.Method)requestbody, _ := ioutil.ReadAll(r.Body)log.Println("request body is", string(requestbody))if r.Method == "POST" {r.ParseForm()// logic part of log infmt.Println("username:", r.Form["username"])fmt.Println("password:", r.Form["password"])us, err := globalSessions.SessionStart(w, r)if err != nil {http.Error(w, err.Error(), http.StatusInternalServerError)return}w.Header().Set("Location", "/auth")w.WriteHeader(http.StatusFound)return}outputHTML(w, r, "static/login.html")}
答案1
得分: 3
请将下面的代码进行注释：
requestbody, _ := ioutil.ReadAll(r.Body)
因为Request.Body的类型是ReadCloser，这会导致r.Body被清空。
参考资料：Golang读取请求体
英文:
Comment the code below:
requestbody, _ := ioutil.ReadAll(r.Body)
Because Request.Body's type is ReadCloser that will empty r.Body.
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