gin框架中HTTP请求和参数的解析

1. 方法一: 通用的处理方法---Handle

package main
 
import (
    "fmt"
    "github.com/gin-gonic/gin"
    "log"
)
 
func main() {
    router := gin.Default()
 
    router.Handle("GET","/hello", func(ctx *gin.Context) {
        fmt.Println(ctx.FullPath())
        //name := ctx.Query("name")
        name := ctx.DefaultQuery("name", "默认值")
        fmt.Println("name =", name)
        ctx.Writer.Write([]byte("hello " + name))
    })
 
    // post: /login?name=zhangsna&pwd=123456
    router.Handle("POST", "/login", func(ctx *gin.Context) {
        // 接收前端传递的json数据
        /* 方法一
        json := make(map[string]interface{})
        ctx.BindJSON(&json)
        fmt.Println(json)
         */
 
        // 方法二
        var userLogin UserLogin
        ctx.Bind(&userLogin)
        fmt.Println(userLogin)
 
        fmt.Println(ctx.FullPath())
        name := ctx.DefaultPostForm("name", "张三")
        pwd := ctx.DefaultPostForm("pwd", "789789")
        ctx.Writer.Write([]byte(name + ":" + pwd))
    })
 
    if err := router.Run(":8000"); err != nil {
        log.Fatalln(err.Error())
    }
}
 
type UserLogin struct {
    Name string `json:"name"`
    Password string `json:"pwd"`
}

2. 分类处理

package main
 
import (
    "fmt"
    "github.com/gin-gonic/gin"
)
 
func Hello(ctx *gin.Context) {
    // GET请求
    fmt.Println(ctx.FullPath(), ctx.ClientIP())
    fmt.Println(ctx.Query("name"))
    ctx.Writer.Write([]byte("hello " + ctx.Query("name")))
}
type Login struct {
    Name string `json:"name"`
    Password string `json:"pwd"`
}
func UserLogin(ctx *gin.Context) {
    // POST请求
    fmt.Println(ctx.FullPath(), ctx.ClientIP())
    var login Login
    ctx.BindJSON(&login)
    fmt.Println(login)
    ctx.Writer.Write([]byte(login.Name + ":" + login.Password))
}
func UserDelete(ctx *gin.Context) {
    id := ctx.Param("id")
    fmt.Println("Param_id:", id)
    ctx.Writer.Write([]byte("delete user id:" + id))
}
 
func main() {
    router := gin.Default()
 
    router.GET("/hello", Hello)
    router.POST("/login", UserLogin)
    router.DELETE("/user/:id", UserDelete)
 
    router.Run(":8000")
}