check that pubsub messages have a Atom namespace before presenting them to the user. Fixes #5757

src/common/pep.py

@@ -544,7 +544,7 @@ class ConnectionPEP(object):
         items = event_tag.getTag('items')
         if items:
             for item in items.getTags('item'):
-                entry = item.getTag('entry')
+                entry = item.getTag('entry', namespace=xmpp.NS_ATOM)
                 if entry:
                     # for each entry in feed (there shouldn't be more than one,
                     # but to be sure...

src/common/xmpp/protocol.py

@@ -28,6 +28,7 @@ NS_ADDRESS        ='http://jabber.org/protocol/address'
 NS_AGENTS          ='jabber:iq:agents'
 NS_AMP            ='http://jabber.org/protocol/amp'
 NS_AMP_ERRORS   =NS_AMP+'#errors'
+NS_ATOM          ='http://www.w3.org/2005/Atom'
 NS_AUTH          ='jabber:iq:auth'
 NS_AVATAR          ='http://www.xmpp.org/extensions/xep-0084.html#ns-metadata'
 NS_BIND          ='urn:ietf:params:xml:ns:xmpp-bind'