Enforce the timezone is reset between requests

Turns out django does not reset the timezone on requests, unless it's
done explicitly. So add a new middleware that does exactly this -- and
then individual requests will set it back to the conference timezone as
required.

Not doing this could lead to very interesting results in a
multi-threaded server...

1 files changed, 13 insertions, 0 deletions

diff --git a/postgresqleu/util/middleware.py b/postgresqleu/util/middleware.py
index 5c4bd83a..71fa743c 100644
--- a/postgresqleu/util/middleware.py
+++ b/postgresqleu/util/middleware.py
@@ -1,5 +1,6 @@
 from django import http
 from django import shortcuts
+from django.utils import timezone
 from django.conf import settings
 
 import base64
@@ -53,3 +54,15 @@ class RedirectMiddleware(object):
     def process_exception(self, request, exception):
         if isinstance(exception, RedirectException):
             return shortcuts.redirect(exception.url)
+
+
+# Enforce that we deactivate the timezone before each request to make the
+# thread return back to the default timezone, since django does *not*
+# reset this on a per-thread basis.
+class TzMiddleware(object):
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request):
+        timezone.deactivate()
+        return self.get_response(request)