4274f49ada
Based on profiling, using around 35 stream handlers quarters the number of basic message stanzas that can be processed in a second, in comparison to only using the bare minimum of four handlers. To help, we can drop handlers for stream features once the session has started. So that we can re-enable these handlers when a stream must restart, the 'stream_start' event has been added which fires whenever a stream header is received. The 'stream_start' event is a more generic replacement for the existing start_stream_handler() method.
80 lines
2.6 KiB
Python
80 lines
2.6 KiB
Python
"""
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SleekXMPP: The Sleek XMPP Library
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Copyright (C) 2011 Nathanael C. Fritz
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This file is part of SleekXMPP.
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See the file LICENSE for copying permission.
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"""
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import logging
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from sleekxmpp.stanza import StreamFeatures
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from sleekxmpp.xmlstream import RestartStream, register_stanza_plugin
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from sleekxmpp.xmlstream.matcher import *
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from sleekxmpp.xmlstream.handler import *
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from sleekxmpp.plugins.base import base_plugin
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from sleekxmpp.features.feature_starttls import stanza
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log = logging.getLogger(__name__)
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class feature_starttls(base_plugin):
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def plugin_init(self):
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self.name = "STARTTLS"
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self.rfc = '6120'
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self.description = "STARTTLS Stream Feature"
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self.stanza = stanza
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self.xmpp.register_feature('starttls',
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self._handle_starttls,
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restart=True,
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order=self.config.get('order', 0))
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self.xmpp.add_event_handler('stream_start',
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self._handle_stream_start)
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self.xmpp.add_event_handler('session_start',
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self._handle_session_start)
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self.xmpp.register_stanza(stanza.Proceed)
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self.xmpp.register_stanza(stanza.Failure)
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register_stanza_plugin(StreamFeatures, stanza.STARTTLS)
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def _handle_stream_start(self, root):
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self.xmpp.register_handler(
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Callback('STARTTLS Proceed',
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MatchXPath(stanza.Proceed.tag_name()),
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self._handle_starttls_proceed,
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instream=True))
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def _handle_session_start(self, e):
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self.xmpp.remove_handler('STARTTLS Proceed')
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def _handle_starttls(self, features):
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"""
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Handle notification that the server supports TLS.
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Arguments:
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features -- The stream:features element.
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"""
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if 'starttls' in self.xmpp.features:
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# We have already negotiated TLS, but the server is
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# offering it again, against spec.
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return False
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elif not self.xmpp.use_tls:
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return False
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elif self.xmpp.ssl_support:
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self.xmpp.send(features['starttls'], now=True)
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return True
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else:
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log.warning("The module tlslite is required to log in" + \
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" to some servers, and has not been found.")
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return False
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def _handle_starttls_proceed(self, proceed):
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"""Restart the XML stream when TLS is accepted."""
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log.debug("Starting TLS")
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if self.xmpp.start_tls():
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self.xmpp.features.add('starttls')
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raise RestartStream()
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