使用 Golang 框架开发 Web 应用的最佳实践

package main

import (
    "fmt"
    "net/http"

    "github.com/gin-gonic/gin"
)

type User struct {
    ID       int    `json:"id"`
    Username string `json:"username"`
    Password string `json:"password"`
}

var users = []User{
    {ID: 1, Username: "user1", Password: "password1"},
    {ID: 2, Username: "user2", Password: "password2"},
}

func getUsers(c *gin.Context) {
    c.JSON(http.StatusOK, users)
}

func getUser(c *gin.Context) {
    id := c.Param("id")
    for _, user := range users {
        if user.ID == id {
            c.JSON(http.StatusOK, user)
            return
        }
    }
    c.JSON(http.StatusNotFound, gin.H{"error": "User not found"})
}

func createUser(c *gin.Context) {
    var newUser User
    if err := c.BindJSON(&newUser); err != nil {
        c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
        return
    }
    users = append(users, newUser)
    c.JSON(http.StatusCreated, newUser)
}

func updateUser(c *gin.Context) {
    id := c.Param("id")
    for _, user := range users {
        if user.ID == id {
            if err := c.BindJSON(&user); err != nil {
                c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
                return
            }
            c.JSON(http.StatusOK, user)
            return
        }
    }
    c.JSON(http.StatusNotFound, gin.H{"error": "User not found"})
}

func deleteUser(c *gin.Context) {
    id := c.Param("id")
    for i, user := range users {
        if user.ID == id {
            users = append(users[:i], users[i+1:]...)
            c.JSON(http.StatusOK, gin.H{"message": "User deleted"})
            return
        }
    }
    c.JSON(http.StatusNotFound, gin.H{"error": "User not found"})
}

func main() {
    router := gin.Default()

    router.GET("/users", getUsers)
    router.GET("/users/:id", getUser)
    router.POST("/users", createUser)
    router.PUT("/users/:id", updateUser)
    router.DELETE("/users/:id", deleteUser)

    router.Run(":8080")
}