Merge branch 'archweb' into archweb-generic2

1 files changed, 9 insertions, 1 deletions

diff --git a/main/utils.py b/main/utils.py
index cdd4ff71..9ee8db58 100644
--- a/main/utils.py
+++ b/main/utils.py
@@ -3,11 +3,11 @@ try:
 except ImportError:
     import pickle
 
-from datetime import datetime
 import hashlib
 
 from django.core.cache import cache
 from django.db import connections, router
+from django.http import HttpResponse
 from django.utils.timezone import now
 from django.template.defaultfilters import slugify
 
@@ -55,6 +55,14 @@ def clear_cache_function(func, args, kwargs):
     cache.delete(key)
 
 
+def empty_response():
+    empty = HttpResponse('')
+    # designating response as 'streaming' forces ConditionalGetMiddleware to
+    # not add a 'Content-Length: 0' header
+    empty.streaming = True
+    return empty
+
+
 def format_http_headers(request):
     headers = sorted((k, v) for k, v in request.META.items()
             if k.startswith('HTTP_'))