slixmpp/sleekxmpp/clientxmpp.py
Lance Stout 1e01903072 Revert "Remove stream feature handlers on session_start."
This reverts commit 4274f49ada.

The SASL mech was choking on this, so let's send it back for some
more refining.
2012-01-18 11:51:00 -08:00

310 lines
12 KiB
Python

# -*- coding: utf-8 -*-
"""
sleekxmpp.clientxmpp
~~~~~~~~~~~~~~~~~~~~
This module provides XMPP functionality that
is specific to client connections.
Part of SleekXMPP: The Sleek XMPP Library
:copyright: (c) 2011 Nathanael C. Fritz
:license: MIT, see LICENSE for more details
"""
from __future__ import absolute_import, unicode_literals
import logging
import base64
import sys
import hashlib
import random
import threading
import sleekxmpp
from sleekxmpp import plugins
from sleekxmpp import stanza
from sleekxmpp import features
from sleekxmpp.basexmpp import BaseXMPP
from sleekxmpp.stanza import *
from sleekxmpp.xmlstream import XMLStream, RestartStream
from sleekxmpp.xmlstream import StanzaBase, ET, register_stanza_plugin
from sleekxmpp.xmlstream.matcher import *
from sleekxmpp.xmlstream.handler import *
# Flag indicating if DNS SRV records are available for use.
try:
import dns.resolver
except ImportError:
DNSPYTHON = False
else:
DNSPYTHON = True
log = logging.getLogger(__name__)
class ClientXMPP(BaseXMPP):
"""
SleekXMPP's client class. (Use only for good, not for evil.)
Typical use pattern:
.. code-block:: python
xmpp = ClientXMPP('user@server.tld/resource', 'password')
# ... Register plugins and event handlers ...
xmpp.connect()
xmpp.process(block=False) # block=True will block the current
# thread. By default, block=False
:param jid: The JID of the XMPP user account.
:param password: The password for the XMPP user account.
:param ssl: **Deprecated.**
:param plugin_config: A dictionary of plugin configurations.
:param plugin_whitelist: A list of approved plugins that
will be loaded when calling
:meth:`~sleekxmpp.basexmpp.BaseXMPP.register_plugins()`.
:param escape_quotes: **Deprecated.**
"""
def __init__(self, jid, password, ssl=False, plugin_config={},
plugin_whitelist=[], escape_quotes=True, sasl_mech=None):
BaseXMPP.__init__(self, jid, 'jabber:client')
self.set_jid(jid)
self.password = password
self.escape_quotes = escape_quotes
self.plugin_config = plugin_config
self.plugin_whitelist = plugin_whitelist
self.default_port = 5222
self.stream_header = "<stream:stream to='%s' %s %s version='1.0'>" % (
self.boundjid.host,
"xmlns:stream='%s'" % self.stream_ns,
"xmlns='%s'" % self.default_ns)
self.stream_footer = "</stream:stream>"
self.features = set()
self._stream_feature_handlers = {}
self._stream_feature_order = []
#TODO: Use stream state here
self.authenticated = False
self.sessionstarted = False
self.bound = False
self.bindfail = False
self.add_event_handler('connected', self._handle_connected)
self.add_event_handler('session_bind', self._handle_session_bind)
self.register_stanza(StreamFeatures)
self.register_handler(
Callback('Stream Features',
MatchXPath('{%s}features' % self.stream_ns),
self._handle_stream_features))
self.register_handler(
Callback('Roster Update',
MatchXPath('{%s}iq/{%s}query' % (
self.default_ns,
'jabber:iq:roster')),
self._handle_roster))
# Setup default stream features
self.register_plugin('feature_starttls')
self.register_plugin('feature_bind')
self.register_plugin('feature_session')
self.register_plugin('feature_mechanisms',
pconfig={'use_mech': sasl_mech} if sasl_mech else None)
def connect(self, address=tuple(), reattempt=True,
use_tls=True, use_ssl=False):
"""Connect to the XMPP server.
When no address is given, a SRV lookup for the server will
be attempted. If that fails, the server user in the JID
will be used.
:param address -- A tuple containing the server's host and port.
:param reattempt: If ``True``, repeat attempting to connect if an
error occurs. Defaults to ``True``.
:param use_tls: Indicates if TLS should be used for the
connection. Defaults to ``True``.
:param use_ssl: Indicates if the older SSL connection method
should be used. Defaults to ``False``.
"""
self.session_started_event.clear()
if not address:
address = (self.boundjid.host, 5222)
return XMLStream.connect(self, address[0], address[1],
use_tls=use_tls, use_ssl=use_ssl,
reattempt=reattempt)
def get_dns_records(self, domain, port=None):
"""Get the DNS records for a domain, including SRV records.
:param domain: The domain in question.
:param port: If the results don't include a port, use this one.
"""
if port is None:
port = self.default_port
if DNSPYTHON:
try:
record = "_xmpp-client._tcp.%s" % domain
answers = []
for answer in dns.resolver.query(record, dns.rdatatype.SRV):
address = (answer.target.to_text()[:-1], answer.port)
answers.append((address, answer.priority, answer.weight))
except (dns.resolver.NXDOMAIN, dns.resolver.NoAnswer):
log.warning("No SRV records for %s", domain)
answers = super(ClientXMPP, self).get_dns_records(domain, port)
except dns.exception.Timeout:
log.warning("DNS resolution timed out " + \
"for SRV record of %s", domain)
answers = super(ClientXMPP, self).get_dns_records(domain, port)
return answers
else:
log.warning("dnspython is not installed -- " + \
"relying on OS A record resolution")
return [((domain, port), 0, 0)]
def register_feature(self, name, handler, restart=False, order=5000):
"""Register a stream feature handler.
:param name: The name of the stream feature.
:param handler: The function to execute if the feature is received.
:param restart: Indicates if feature processing should halt with
this feature. Defaults to ``False``.
:param order: The relative ordering in which the feature should
be negotiated. Lower values will be attempted
earlier when available.
"""
self._stream_feature_handlers[name] = (handler, restart)
self._stream_feature_order.append((order, name))
self._stream_feature_order.sort()
def update_roster(self, jid, name=None, subscription=None, groups=[],
block=True, timeout=None, callback=None):
"""Add or change a roster item.
:param jid: The JID of the entry to modify.
:param name: The user's nickname for this JID.
:param subscription: The subscription status. May be one of
``'to'``, ``'from'``, ``'both'``, or
``'none'``. If set to ``'remove'``,
the entry will be deleted.
:param groups: The roster groups that contain this item.
:param block: Specify if the roster request will block
until a response is received, or a timeout
occurs. Defaults to ``True``.
:param timeout: The length of time (in seconds) to wait
for a response before continuing if blocking
is used. Defaults to
:attr:`~sleekxmpp.xmlstream.xmlstream.XMLStream.response_timeout`.
:param callback: Optional reference to a stream handler function.
Will be executed when the roster is received.
Implies ``block=False``.
"""
return self.client_roster.update(jid, name, subscription, groups,
block, timeout, callback)
def del_roster_item(self, jid):
"""Remove an item from the roster.
This is done by setting its subscription status to ``'remove'``.
:param jid: The JID of the item to remove.
"""
return self.client_roster.remove(jid)
def get_roster(self, block=True, timeout=None, callback=None):
"""Request the roster from the server.
:param block: Specify if the roster request will block until a
response is received, or a timeout occurs.
Defaults to ``True``.
:param timeout: The length of time (in seconds) to wait for a response
before continuing if blocking is used.
Defaults to
:attr:`~sleekxmpp.xmlstream.xmlstream.XMLStream.response_timeout`.
:param callback: Optional reference to a stream handler function. Will
be executed when the roster is received.
Implies ``block=False``.
"""
iq = self.Iq()
iq['type'] = 'get'
iq.enable('roster')
if not block and callback is None:
callback = lambda resp: self._handle_roster(resp, request=True)
response = iq.send(block, timeout, callback)
if block:
self._handle_roster(response, request=True)
return response
def _handle_connected(self, event=None):
#TODO: Use stream state here
self.authenticated = False
self.sessionstarted = False
self.bound = False
self.bindfail = False
self.features = set()
def _handle_stream_features(self, features):
"""Process the received stream features.
:param features: The features stanza.
"""
for order, name in self._stream_feature_order:
if name in features['features']:
handler, restart = self._stream_feature_handlers[name]
if handler(features) and restart:
# Don't continue if the feature requires
# restarting the XML stream.
return True
def _handle_roster(self, iq, request=False):
"""Update the roster after receiving a roster stanza.
:param iq: The roster stanza.
:param request: Indicates if this stanza is a response
to a request for the roster, and not an
empty acknowledgement from the server.
"""
if iq['type'] == 'set' or (iq['type'] == 'result' and request):
for jid in iq['roster']['items']:
item = iq['roster']['items'][jid]
roster = self.roster[iq['to'].bare]
roster[jid]['name'] = item['name']
roster[jid]['groups'] = item['groups']
roster[jid]['from'] = item['subscription'] in ['from', 'both']
roster[jid]['to'] = item['subscription'] in ['to', 'both']
roster[jid]['pending_out'] = (item['ask'] == 'subscribe')
self.event('roster_received', iq)
self.event("roster_update", iq)
if iq['type'] == 'set':
iq.reply()
iq.enable('roster')
iq.send()
def _handle_session_bind(self, jid):
"""Set the client roster to the JID set by the server.
:param :class:`sleekxmpp.xmlstream.jid.JID` jid: The bound JID as
dictated by the server. The same as :attr:`boundjid`.
"""
self.client_roster = self.roster[jid]
# To comply with PEP8, method names now use underscores.
# Deprecated method names are re-mapped for backwards compatibility.
ClientXMPP.updateRoster = ClientXMPP.update_roster
ClientXMPP.delRosterItem = ClientXMPP.del_roster_item
ClientXMPP.getRoster = ClientXMPP.get_roster
ClientXMPP.registerFeature = ClientXMPP.register_feature