gin框架之中间件

package main
import (  "fmt"  "github.com/gin-gonic/gin"  "net/http")
func MyMiddleware(c *gin.Context) {  fmt.Println("MyMiddleware")  c.Next()}func main() {  router := gin.Default()  router.POST("/upload", func(c *gin.Context) {    file, _ := c.FormFile("file")
    // 上传文件至指定目录    if err := c.SaveUploadedFile(file, "./upload/"+file.Filename); err != nil {      fmt.Println(err)    }    c.String(http.StatusOK, fmt.Sprintf("'%s' uploaded!", file.Filename))  })  router.POST("/upload/multi", func(c *gin.Context) {    // Multipart form    form, _ := c.MultipartForm()    files := form.File["file[]"]
    for _, file := range files {      if err := c.SaveUploadedFile(file, "./upload/"+file.Filename); err != nil {        fmt.Println(err)      }    }    c.String(http.StatusOK, fmt.Sprintf("%d files uploaded!", len(files)))  })    //使用自定义的中间件，后面额路由请求都会受到该中间件的限制  router.Use(MyMiddleware)  router.GET("/middleware", func(context *gin.Context) {
  })  router.Run(":8080")}

func MyMiddleware(c *gin.Context) {  fmt.Println("MyMiddleware")  c.Next()}