Go 实现 Web网站的登录 功能
1、登录页面html
<!DOCTYPE HTML>
<html class="no-js">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="renderer" content="webkit">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>登录</title>
<meta name="robots" content="noindex, nofollow">
<link rel="stylesheet" href="/static/css/style.css?v=17.10.30">
</head>
<body class="body-100">
<div class="typecho-login-wrap">
<div class="typecho-login">
<form action="" method="post" name="login" role="form">
<p>
<label for="name" class="sr-only">用户名</label>
<input type="text" id="name" name="username" value="" placeholder="用户名" class="text-l w-100" autofocus />
</p>
<p>
<label for="password" class="sr-only">密码</label>
<input type="password" id="password" name="password" class="text-l w-100" placeholder="密码" />
</p>
<p class="submit">
<button type="submit" class="btn btn-l w-100 primary">登录</button>
</p>
</form>
</div>
</div>
</body>
</html>
2、处理网站登录以及获取http post数据，验证密码功能
package main
import (
"fmt"
"html/template"
"log"
"net/http"
"strings"
"time"
)
type Item struct {
Name string
Price int
}
func logouthanler(w http.ResponseWriter, r *http.Request) {
expiredTime := time.Now()
c1 := &http.Cookie{
Name: "username",
Expires: expiredTime,
MaxAge: -1,
HttpOnly: true,
}
http.SetCookie(w, c1)
}
// 登陆页面
func loginhanler(w http.ResponseWriter, r *http.Request) {
// 如果是post请求，注意先后顺序
if r.Method == http.MethodPost {
// 解析表单 并且校验
r.ParseForm()
for k, v := range r.Form {
fmt.Println("key:", k)
fmt.Println("val:", strings.Join(v, "-"))
}
userName := r.FormValue("username")
pwd := r.FormValue("password")
fmt.Println("userName:", userName)
fmt.Println("pwd:", pwd)
// 如果输入正确，则发送cookie 并给出反馈
if userName == "const" && pwd == "const" {
c1 := &http.Cookie{
Name: "username",
Value: userName,
MaxAge: 0,
HttpOnly: true,
}
http.SetCookie(w, c1)
//fmt.Fprint(w, "登陆成功")
http.Redirect(w, r, "/manage", http.StatusFound)
} else {
fmt.Fprint(w, "登陆失败")
}
// 显示登录页面
} else {
// 解析模板
t, err := template.ParseFiles("index.html")
if err != nil {
log.Fatal(err)
}
t.Execute(w, "")
}
}
func manageHandler(w http.ResponseWriter, r *http.Request) {
username, err := r.Cookie("username")
if err != nil || username.Value == "" {
http.Redirect(w, r, "/", http.StatusFound)
}
fmt.Println("enter manage1")
t, err := template.ParseFiles("manage.html")
if err != nil {
log.Fatal(err)
}
fmt.Println("enter manage2")
t.Execute(w, username.Value)
}
func main() {
mux := http.NewServeMux()
mux.HandleFunc("/", loginhanler)
mux.HandleFunc("/login", loginhanler)
mux.HandleFunc("/manage", manageHandler)
mux.HandleFunc("/logout", logouthanler)
fs := http.FileServer(http.Dir("."))
mux.Handle("/static/", http.StripPrefix("/static/", fs))
server := &http.Server{
Addr: ":8080",
Handler: mux,
}
err := server.ListenAndServe()
if err != nil {
log.Fatal(err)
}
}
3、登录效果
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