优化首页公告与轮播图

backend/internal/modules/file/handler.go

@@ -48,6 +48,14 @@ func (h *Handler) Upload(c *gin.Context) {
 }
 
 func (h *Handler) Object(c *gin.Context) {
+	h.writeObject(c, false)
+}
+
+func (h *Handler) PublicObject(c *gin.Context) {
+	h.writeObject(c, true)
+}
+
+func (h *Handler) writeObject(c *gin.Context, publicOnly bool) {
 	if h.storage == nil {
 		response.ServiceUnavailable(c, "文件存储未连接")
 		return
@@ -57,6 +65,10 @@ func (h *Handler) Object(c *gin.Context) {
 		response.BadRequest(c, "文件 key 不正确")
 		return
 	}
+	if publicOnly && !strings.HasPrefix(key, "home-banner/") {
+		response.Error(c, http.StatusNotFound, "not_found", "文件不存在或暂不可访问")
+		return
+	}
 	object, err := h.storage.Get(c.Request.Context(), key)
 	if err != nil {
 		response.Error(c, http.StatusNotFound, "not_found", "文件不存在或暂不可访问")

backend/internal/modules/file/service.go

@@ -48,9 +48,13 @@ func (s *Service) Upload(req uploadRequest) (*UploadDTO, error) {
 	if err != nil {
 		return nil, err
 	}
+	url := "/api/files/object?key=" + key
+	if scene == "home-banner" {
+		url = "/api/public/files/object?key=" + key
+	}
 	return &UploadDTO{
 		ObjectKey:   key,
-		URL:         "/api/files/object?key=" + key,
+		URL:         url,
 		Filename:    req.Header.Filename,
 		ContentType: contentType,
 		Size:        req.Header.Size,
@@ -60,7 +64,7 @@ func (s *Service) Upload(req uploadRequest) (*UploadDTO, error) {
 func normalizeScene(scene string) string {
 	scene = strings.TrimSpace(strings.ToLower(scene))
 	switch scene {
-	case "listing", "handoff", "dispute", "realname", "avatar":
+	case "listing", "handoff", "dispute", "realname", "avatar", "home-banner":
 		return scene
 	default:
 		return "misc"