diff -r 044dc196ec8a -r d3668ecd9137 src/ztfy/utils/session.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/ztfy/utils/session.py	Wed Jun 20 16:29:53 2012 +0200
@@ -0,0 +1,40 @@
+### -*- coding: utf-8 -*- ####################################################
+##############################################################################
+#
+# Copyright (c) 2008-2010 Thierry Florac <tflorac AT ulthar.net>
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+
+__docformat__ = "restructuredtext"
+
+# import standard packages
+
+# import Zope3 interfaces
+from zope.session.interfaces import ISession
+
+# import local interfaces
+
+# import Zope3 packages
+
+# import local packages
+from security import unproxied
+
+
+def getData(request, app, key, default=None):
+    """Get data associated with a given session"""
+    session = ISession(request)[app]
+    return session.get(key, default)
+
+
+def setData(request, app, key, value):
+    """Set data associated to a given session"""
+    session = ISession(request)[app]
+    session[key] = unproxied(value)