Bugfix ensure request files are closed

By adding a close method to requests and call on cleanup. This mirrors
the method in Flask and ensures that any files opened for the request
e.g. when parsing body data files are closed.

Author: pgjones

src/quart/ctx.py

@@ -147,6 +147,10 @@ async def pop(self, exc: BaseException | None = _sentinel) -> None:  # type: ign
                 if exc is _sentinel:
                     exc = sys.exc_info()[1]
                 await self.app.do_teardown_request(exc, self)
+
+                request_close = getattr(self.request_websocket, "close", None)
+                if request_close is not None:
+                    await request_close()
         finally:
             ctx = _cv_request.get()
             token, app_ctx = self._cv_tokens.pop()

src/quart/wrappers/request.py

@@ -4,7 +4,7 @@
 from typing import Any, AnyStr, Awaitable, Callable, Generator, NoReturn, overload
 
 from hypercorn.typing import HTTPScope
-from werkzeug.datastructures import CombinedMultiDict, Headers, MultiDict
+from werkzeug.datastructures import CombinedMultiDict, Headers, iter_multi_items, MultiDict
 from werkzeug.exceptions import BadRequest, RequestEntityTooLarge, RequestTimeout
 
 from .base import BaseRequestWebsocket
@@ -346,3 +346,7 @@ async def send_push_promise(self, path: str) -> None:
             for value in self.headers.getlist(name):
                 headers.add(name, value)
         await self._send_push_promise(path, headers)
+
+    async def close(self) -> None:
+        for _key, value in iter_multi_items(self._files or ()):
+            value.close()