golang http上传文件

func UpLoad(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
	r.ParseMultipartForm(32 << 20)
	files := r.MultipartForm.File["file"]
	len := len(files)
	for i := 0; i < len; i++ {
		file, err := files[i].Open()
		defer file.Close()
		if err != nil {
			log.Fatal(err)
		}
		fileInfo := files[i]
		fileDir := "upload"
		suffixName := path.Ext(fileInfo.Filename)
		newFileName := strings.Replace(uuid.New().String(), "-", "", -1) + suffixName
		fileUri := fileDir + newFileName
		os.Mkdir("./"+fileDir, os.ModePerm)
		cur, err := os.Create("./" + fileUri)

		defer cur.Close()
		if err != nil {
			log.Fatal(err)
		}
		io.Copy(cur, file)

	}
}