fix: some error

core/storage.py

@@ -27,14 +27,6 @@ from fastapi.responses import FileResponse
 
 
 class FileStorageInterface:
-    _instance: Optional["FileStorageInterface"] = None
-
-    def __new__(cls, *args, **kwargs):
-        if cls._instance is None:
-            cls._instance = super(FileStorageInterface, cls).__new__(
-                cls, *args, **kwargs
-            )
-        return cls._instance
 
     async def save_file(self, file: UploadFile, save_path: str):
         """
@@ -191,7 +183,10 @@ class SystemFileStorage(FileStorageInterface):
         """
         chunk_dir = (self.root_path / save_path).parent / 'chunks'
         if chunk_dir.exists():
-            shutil.rmtree(chunk_dir)
+            try:
+                shutil.rmtree(chunk_dir)
+            except Exception as e:
+                logger.info(f"清理本地分片目录失败: {e}")
 
 
 class S3FileStorage(FileStorageInterface):