Function PreviewFile

api/controller/upload.go:150–194

PreviewFile @Summary Preview a file @Description Preview a file @Tags Upload @Accept json @Produce octet-stream @Param key path string true "file key" @Success 200 {object} []byte "file content" 修改路由定义，使用路径参数 @Router /api/preview/{key} [get]

(c *gin.Context)

// 修改路由定义，使用路径参数
// @Router       /api/preview/{key} [get]
func PreviewFile(c *gin.Context) {
	// 从路径参数中获取 key
	key := c.Param("key")
	if key == "" {
		c.JSON(http.StatusBadRequest, model.ParamError.ToResponse(nil))
		return
	}

	// uploadFile, err := model.GetUploadFileByEidAndPreviewKey(config.GetEID(c), key)
	// if err != nil {
	// 	c.JSON(http.StatusBadRequest, model.NotFound.ToResponse(err))
	// 	return
	// }
	uploadFile, err := model.GetNoAuthUploadFileByEidAndPreviewKey(key)
	if err != nil {
		c.JSON(http.StatusBadRequest, model.NotFound.ToResponse(err))
		return
	}

	filename := uploadFile.FileName
	encodedFilename := url.QueryEscape(filename)

	c.Header("Content-Disposition", `inline; filename="`+filename+`"; filename*=UTF-8''`+encodedFilename)
	c.Header("Content-Type", uploadFile.MimeType)
	c.Header("Content-Length", fmt.Sprintf("%d", uploadFile.Size))

	if _, ok := storage.StorageInstance.(*storage.LocalStorage); ok {
		file, err := os.Open(uploadFile.Key)
		if err != nil {
			c.JSON(http.StatusBadRequest, model.FileError.ToResponse(err))
			return
		}
		defer file.Close()
		c.Status(http.StatusOK)
		_, _ = io.Copy(c.Writer, file)
		return
	}

	fileContent, err := storage.StorageInstance.Load(uploadFile.Key)
	if err != nil {
		c.JSON(http.StatusBadRequest, model.FileError.ToResponse(err))
		return
	}
	c.Data(http.StatusOK, uploadFile.MimeType, fileContent)
}