golang框架gin中间件的写法

package main

import (
“fmt”
“github.com/gin-gonic/gin”
)

func middleware() gin.HandlerFunc {
return func(c *gin.Context) {
fmt.Println(“I am before next”)
c.Header(“Access-Control-Allow-Origin”, “test”)
c.Set(“name”, “test”)
/*
c.Next()后就执行真实的路由函数，路由函数执行完成之后继续执行后续的代码
*/
c.Next()
fmt.Println(“I am after next”)
}
}

func main() {
r := gin.Default()
r.Use(middleware())
r.GET(“/test”, func(c *gin.Context) {
fmt.Println(“I am https://www.zhouchun.net”)
name, _ := c.Get(“name”)
c.JSON(200, gin.H{“name”: name})
})
r.Run(“0.0.0.0:10020”)
}