fix: 修复漏洞

Author: SilianZ

core/storages/alist.py

@@ -135,7 +135,7 @@ async def express(self, hash: str, request: web.Request, response) -> Dict[str,
                 response = web.HTTPFound(data["data"]["raw_url"])
                 response.headers["x-bmclapi-hash"] = hash
                 await response.prepare(request)
-                return {"bytes": data["size"], "hits": 1}
+                return {"bytes": data["data"]["size"], "hits": 1}
             except Exception as e:
                 response = web.HTTPInternalServerError(reason=e)
                 await response.prepare(request)