resource

var File = router.Handler(func(c router.Context) {
	filename := c.Param("filename")
	filePath := path.Join(config2.Upload.Path, config2.Upload.File.Path, filename)
	if !fs.PathExists(filePath) {

		http.NotFound(c.Writer(), c.Request())
		return
	}
	http.ServeFile(c.Writer(), c.Request(), filePath)
})

var Image = router.Handler(func(c router.Context) {
	var (
		img      image.Image
		err      error
		filename = c.Param("filename")
		file     *os.File
		query    Query
	)
	originImagePath := path.Join(config.Upload.Path, config.Upload.Image.Path, filename)
	if !fs.PathExists(originImagePath) {

		http.NotFound(c.Writer(), c.Request())
		return
	}

	defer func() {
		if err != nil {
			http.Error(c.Writer(), err.Error(), http.StatusInternalServerError)
		}
	}()

	if err = c.ShouldBindQuery(&query); err != nil {
		return
	}

	if err = validator.ValidateStruct(query); err != nil {
		return
	}

	defer func() {
		if err != nil {
			http.ServeFile(c.Writer(), c.Request(), originImagePath)
		}
	}()

	if query.Scale != nil {
		extname := strings.ToLower(path.Ext(filename))

		if file, err = os.Open(originImagePath); err != nil {
			return
		}

		defer func() {
			if err = file.Close(); err != nil {
				return
			}
		}()

		if img, err = DecodeImage(file); err != nil {
			return
		}

		c.Header("Content-Type", mime.TypeByExtension(extname))

		if err = EncodeImage(&img, file, c.Writer(), query); err != nil {
			return
		}

		return
	}

	if query.Width != nil || query.Height != nil {
		extname := strings.ToLower(path.Ext(filename))

		if file, err = os.Open(originImagePath); err != nil {
			return
		}

		defer func() {
			if err = file.Close(); err != nil {
				return
			}
		}()

		if img, err = DecodeImage(file); err != nil {
			return
		}

		c.Header("Content-Type", mime.TypeByExtension(extname))

		if err = EncodeImage(&img, file, c.Writer(), query); err != nil {
			return
		}

		return
	}

	http.ServeFile(c.Writer(), c.Request(), originImagePath)
})