53 lines
1.0 KiB
Go
53 lines
1.0 KiB
Go
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package main
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import (
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"fmt"
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"github.com/gin-gonic/gin"
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"time"
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)
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//定义一个GIN中间件
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func middleware() gin.HandlerFunc {
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return func(c *gin.Context) {
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t1 := time.Now()
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fmt.Println("中间件开始执行了")
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//设置变量到context的key中,可以通过GET取到
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c.Set("request", "中间件")
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//执行函数 拦截handler
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c.Next()
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status := c.Writer.Status()
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fmt.Println("中间件执行完毕", status)
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t2 := time.Since(t1)
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fmt.Println("time: ", t2)
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}
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}
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func main() {
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//1.创建路由
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r := gin.Default()
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//注册中间件
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r.Use(middleware())
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//{}是为了代码规范
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{
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r.GET("/middleware", func(c *gin.Context) {
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//取值
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req, _ := c.Get("request")
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fmt.Println("req:", req)
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//页面接收
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c.JSON(200, gin.H{"request": req})
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})
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//跟路由后面是定义的局部中间件
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r.GET("/middleware2", middleware(), func(c *gin.Context) {
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//取值
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req, _ := c.Get("request")
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fmt.Println("req:", req)
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//页面接收
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c.JSON(200, gin.H{"request": req})
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})
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}
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r.Run(":8000")
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}
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