Fixed #22680 -- I/O operation on closed file.

This patch is two-fold; first it ensure that Django does close everything in
request.FILES at the end of the request and secondly the storage system should
no longer close any files during save, it's up to the caller to handle that --
or let Django close the files at the end of the request.

1 files changed, 6 insertions, 0 deletions

diff --git a/django/http/request.py b/django/http/request.py
index 84457c5300..250db32bf2 100644
--- a/django/http/request.py
+++ b/django/http/request.py
@@ -5,6 +5,7 @@ import os
 import re
 import sys
 from io import BytesIO
+from itertools import chain
 from pprint import pformat
 
 from django.conf import settings
@@ -256,6 +257,11 @@ class HttpRequest(object):
         else:
             self._post, self._files = QueryDict('', encoding=self._encoding), MultiValueDict()
 
+    def close(self):
+        if hasattr(self, '_files'):
+            for f in chain.from_iterable(l[1] for l in self._files.lists()):
+                f.close()
+
     # File-like and iterator interface.
     #
     # Expects self._stream to be set to an appropriate source of bytes by