Function GetFileBodyContent

api/controller/file_preview.go:433–479

GetFileBodyContent godoc @Summary 获取文件版本内容 @Description 根据file_body_id获取文件内容，从content_path读取完整内容 @Tags 文件内容管理 @Accept json @Produce json @Security BearerAuth @Param file_body_id path int true "文件内容ID" @Param filename path string false "文件名（可选）" @Success 200 {object} string "文件内容" @Router /api/file-v

(c *gin.Context)

// @Success 200 {object} string "文件内容"
// @Router /api/file-version/{file_body_id} [get]
func GetFileBodyContent(c *gin.Context) {
	idStr := c.Param("file_body_id")
	if idStr == "" {
		c.JSON(http.StatusBadRequest, model.ParamError.ToResponse(errors.New("文件内容ID不能为空")))
		return
	}

	fileBodyID, err := strconv.ParseInt(idStr, 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, model.ParamError.ToResponse(errors.New("无效的文件内容ID")))
		return
	}

	// 获取文件内容记录
	fileBody, err := model.GetFileBodyByID(fileBodyID)
	if err != nil {
		c.JSON(http.StatusNotFound, model.NotFound.ToResponse(err))
		return
	}

	// 加载完整内容（从content_path读取）
	if err := fileBody.LoadContent(); err != nil {
		c.JSON(http.StatusInternalServerError, model.FileError.ToResponse(err))
		return
	}

	// 获取关联文件信息以确定Content-Type
	file, err := model.GetFileByIDOlny(fileBody.FileID)
	if err != nil {
		c.JSON(http.StatusNotFound, model.NotFound.ToResponse(err))
		return
	}

	filePath := strings.TrimSuffix(file.Path, ".md")
	ext := strings.ToLower(filepath.Ext(filePath))

	contentType := "text/markdown; charset=utf-8"
	switch ext {
	case ".txt":
		contentType = "text/plain; charset=utf-8"
	case ".html", ".htm":
		contentType = "text/html; charset=utf-8"
	}

	c.Header("Content-Type", contentType)
	c.String(http.StatusOK, fileBody.Content)
}