kratos实现csv文件的导入和导出

kratos使用http方式实现文件的导出和导入

• 注册路由

	srv := http.NewServer(opts...)

	route := srv.Route("/")
	route.POST("/upload", uploadFile)
	route.GET("/download", downloadFile)

• 导出实现

func downloadFile(ctx http.Context) error {
   
	head := []string{
   "商品编号", "商品名称"