Golang如何实现基本的用户注册_Golang用户注册表单处理示例

  
注册新用户
  

    用户名：


    邮箱：


    密码：


    注册
  

package main

import (
    "fmt"
    "html/template"
    "log"
    "net/http"
)

type User struct {
    Username string
    Email    string
    Password string // 实际项目中应存哈希值
}

var users []User // 简化示例：用切片模拟数据库

func main() {
    http.HandleFunc("/", showRegisterForm)
    http.HandleFunc("/register", handleRegister)

    fmt.Println("服务器运行在 http://localhost:8080")
    log.Fatal(http.ListenAndServe(":8080", nil))
}

func showRegisterForm(w http.ResponseWriter, r *http.Request) {
    if r.Method == "GET" {
        tmpl := `




  
注册新用户
  

    用户名：
    


    邮箱：
    


    密码：
    


    注册
  


`
        t := template.Must(template.New("form").Parse(tmpl))
        t.Execute(w, nil)
    }
}

import (
    "golang.org/x/crypto/bcrypt"
)

func handleRegister(w http.ResponseWriter, r *http.Request) {
    if r.Method != "POST" {
        http.Redirect(w, r, "/", http.StatusSeeOther)
        return
    }

    username := r.FormValue("username")
    email := r.FormValue("email")
    password := r.FormValue("password")

    // 简单验证
    if username == "" || email == "" || password == "" {
        http.Error(w, "所有字段都是必填的", http.StatusBadRequest)
        return
    }

    // 密码加密
    hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
    if err != nil {
        http.Error(w, "密码加密失败", http.StatusInternalServerError)
        return
    }

    // 模拟保存到“数据库”
    newUser := User{
        Username: username,
        Email:    email,
        Password: string(hashedPassword),
    }
    users = append(users, newUser)

    w.WriteHeader(http.StatusOK)
    fmt.Fprintf(w, "注册成功！欢迎 %s", username)
}