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第一个Gin项目

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package main
import (
	"github.com/gin-gonic/gin"
)
func main(){
    e := gin.Default()
    e.Run()//默认端口号8080
}

Gin处理form表单

go程序

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package main
import (
	"github.com/gin-gonic/gin"
)
func gologin(c *gin.Context){
    c.HTML(200, "login.html", nil)
}
func login(c *gin.Context){
    username := c.PostForm("username")
    password := c.PostForm("password")
    c.HTML(200, "index.html", gin.H{
        "username": username,
        "password": password,
    })
}
func main(){
    e := gin.Default()
    e.Static("assets", "./assets")
    e.LoadHTMLGlob("tempates/*")
    e.GET("/login", gologin)
    e.POST("/login", login)
    e.Run()
}

index.html

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>主页</h1>
    {{.name}}
    {{.password}}
</body>
</html>

login.html

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<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="./assets/css/login.css">
    <title>login</title>
</head>

<body>
    <div class="form-container">
        <div class="formleft">
            <img src="./assets/img/touxiang.png">
        </div>
        <div class="formright">
            <h1>欢迎回来</h1>
            <p class="py-1">请先登录</p>
            <form action="/login" method="post">
                <label>
                    <p>用户名</p>
                    <input type="text" name="user" class="user-input">
                </label>
                <label>
                    <p>密码</p>
                    <input type="password" name="password" class="pw-input">
                </label>
                <button class="login" type="submit">登录</button>
            </form>
            <a href="./register"><button class="qiehuan" type="submit">注册</button></button></a>
        </div>
    </div>
</body>

</html>

当有多选框时，使用c.PostFormArray("name")函数得到参数数组。

Gin获取请求参数

GET请求参数

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package main
import (
	"github.com/gin-gonic/gin"
)

func login(c *gin.Context){
	key := c.Query("wd")
	// value := c.DefaultQuery("wd", "世界") 查询不到用默认值
	c.String(200, key)
}

func main(){
	e := gin.Default()
	e.GET("/login", login)
	e.Run()
}

POST请求参数

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func fun(c *gin.Context){
    username := c.PostForm("username")
    password := c.DefaultPostForm("password") // 查询不到用默认值
    c.String(200, username)
}

路径参数

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package main
import (
	"github.com/gin-gonic/gin"
)

func login(c *gin.Context){
    s := c.Param("username")
	c.String(200, s)
}

func main(){
	e := gin.Default()
    // localhost:8080/login/taweizhong
    e.GET("/login/:username", login)
	e.Run()
}

Gin数据绑定

POST和GET参数绑定

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package main

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

type User struct{
	Uaername string `form:"username"`
	Password string `form:"password"`
}

func login(c *gin.Context){
	var user User
	c.ShouldBind(&user) // form表单绑定结构体
	c.String(200, "User:%s", user)
}

func main() {
	e := gin.Default()
    // localhost:8080/login?username=taweizhong&password=111 可以绑定查询参数
	e.POST("/login", login)
	e.Run()
}

路径绑定

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package main
import (
	"github.com/gin-gonic/gin"
)

type User struct{
	Uaername string `uri:"username"`
	Password string `uri:"password"`
}
func login(c *gin.Context){
    var user User
	c.ShouldBindUri(&user) 
	c.String(200, "User:%s", user)
}

func main(){
	e := gin.Default()
    // localhost:8080/login/taweizhong/111
    e.GET("/login/:username/:password", login)
	e.Run()
}

Gin访问静态文件和模板文件

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package main
import (
	"github.com/gin-gonic/gin"
)
func gologin(c *gin.Context){
    c.HTML(200, "login.html", nil)
}
func login(c *gin.Context){
    username := c.PostForm("username")
    password := c.PostForm("password")
    c.HTML(200, "index.html", gin.H{
        "username": username,
        "password": password,
    })
}
func main(){
    e := gin.Default()
    e.Static("/assets", "./assets")
    e.LoadHTMLGlob("tempates/*")
    e.GET("/login", gologin)
    e.POST("/login", login)
    e.Run()
}

e.Static("/assets", "./assets")读取css和js等静态文件
e.LoadHTMLGlob("tempates/*")读取html等模板文件

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package main

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

func login(c *gin.Context) {
	s, err := c.Cookie("username")
	if err != nil {
		s = "taweizhong"
		c.SetCookie("username", s, 60*60, "/", "localhost", false, true) //cookie的名称 值 存活时间 路径 域 安全访问 是否是HTTP
	}
	c.String(200, "test")
}

func main() {
	e := gin.Default()
	e.GET("/login", login)
	e.Run()
}

session

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package main

import (
	"fmt"

	"github.com/gin-contrib/sessions"
	"github.com/gin-contrib/sessions/cookie"
	"github.com/gin-gonic/gin"
)

func login(c *gin.Context) {
	sessions := sessions.Default(c)
	fmt.Printf("sessions:----------- %v\n", sessions)
	S := sessions.Get("name")
	fmt.Printf("S:---------- %v\n", S)
	if sessions.Get("hello") != "world"{
		sessions.Set("hello", "world")
		sessions.Save()
	}
	fmt.Printf("sessions:------- %v\n", sessions)
}

func main() {
	e := gin.Default()
	store := cookie.NewStore([]byte("1"))
	e.Use(sessions.Sessions("name", store))
	e.GET("/login", login)
	e.Run()
}

更新于：Sep 5, 2022

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