From a918bf3a95f9accc7272edea4fe4fdab705a0b17 Mon Sep 17 00:00:00 2001
From: Graham <github@gra.dk>
Date: Wed, 14 May 2014 22:32:51 +0100
Subject: [PATCH] Support jabberd2 SASL with really empty response

Despite http://xmpp.org/rfcs/rfc3920.html#rfc.section.6.2, jabberd version 2.2.14 cannot accept the typical "<response xmlns="urn:ietf:params:xml:ns:xmpp-sasl">=</response>".  Instead it must be truly empty, so we force an empty response for this stanza only.
---
 sleekxmpp/features/feature_mechanisms/mechanisms.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sleekxmpp/features/feature_mechanisms/mechanisms.py b/sleekxmpp/features/feature_mechanisms/mechanisms.py
index f71a9c25..17ad5ed0 100644
--- a/sleekxmpp/features/feature_mechanisms/mechanisms.py
+++ b/sleekxmpp/features/feature_mechanisms/mechanisms.py
@@ -215,6 +215,8 @@ class FeatureMechanisms(BasePlugin):
             self.attempted_mechs.add(self.mech.name)
             self.xmpp.disconnect()
         else:
+            if resp.get_value() == '':
+                resp.del_value()
             resp.send(now=True)
 
     def _handle_success(self, stanza):