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-rw-r--r--django/utils/cache.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/django/utils/cache.py b/django/utils/cache.py
index 4c7d0bb840..7c7a41bafa 100644
--- a/django/utils/cache.py
+++ b/django/utils/cache.py
@@ -73,12 +73,12 @@ def patch_response_headers(response, cache_timeout=None):
if cache_timeout is None:
cache_timeout = settings.CACHE_MIDDLEWARE_SECONDS
now = datetime.datetime.utcnow()
- expires = now + datetime.timedelta(0, cache_timeout)
if not response.has_header('ETag'):
response['ETag'] = md5.new(response.get_content_as_string('utf8')).hexdigest()
if not response.has_header('Last-Modified'):
response['Last-Modified'] = now.strftime('%a, %d %b %Y %H:%M:%S GMT')
if not response.has_header('Expires'):
+ expires = now + datetime.timedelta(0, cache_timeout)
response['Expires'] = expires.strftime('%a, %d %b %Y %H:%M:%S GMT')
patch_cache_control(response, max_age=cache_timeout)