481 lines
18 KiB
Python
481 lines
18 KiB
Python
"""
|
|
SleekXMPP: The Sleek XMPP Library
|
|
Copyright (C) 2010 Nathanael C. Fritz
|
|
This file is part of SleekXMPP.
|
|
|
|
See the file LICENSE for copying permission.
|
|
"""
|
|
|
|
from __future__ import absolute_import, unicode_literals
|
|
|
|
import logging
|
|
import base64
|
|
import sys
|
|
import hashlib
|
|
import random
|
|
import threading
|
|
|
|
from sleekxmpp import plugins
|
|
from sleekxmpp import stanza
|
|
from sleekxmpp.basexmpp import BaseXMPP
|
|
from sleekxmpp.stanza import Message, Presence, Iq
|
|
from sleekxmpp.xmlstream import XMLStream, RestartStream
|
|
from sleekxmpp.xmlstream import StanzaBase, ET
|
|
from sleekxmpp.xmlstream.matcher import *
|
|
from sleekxmpp.xmlstream.handler import *
|
|
|
|
# Flag indicating if DNS SRV records are available for use.
|
|
SRV_SUPPORT = True
|
|
try:
|
|
import dns.resolver
|
|
except:
|
|
SRV_SUPPORT = False
|
|
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class ClientXMPP(BaseXMPP):
|
|
|
|
"""
|
|
SleekXMPP's client class.
|
|
|
|
Use only for good, not for evil.
|
|
|
|
Attributes:
|
|
|
|
Methods:
|
|
connect -- Overrides XMLStream.connect.
|
|
del_roster_item -- Delete a roster item.
|
|
get_roster -- Retrieve the roster from the server.
|
|
register_feature -- Register a stream feature.
|
|
update_roster -- Update a roster item.
|
|
"""
|
|
|
|
def __init__(self, jid, password, ssl=False, plugin_config={},
|
|
plugin_whitelist=[], escape_quotes=True):
|
|
"""
|
|
Create a new SleekXMPP client.
|
|
|
|
Arguments:
|
|
jid -- The JID of the XMPP user account.
|
|
password -- The password for the XMPP user account.
|
|
ssl -- Deprecated.
|
|
plugin_config -- A dictionary of plugin configurations.
|
|
plugin_whitelist -- A list of approved plugins that will be loaded
|
|
when calling register_plugins.
|
|
escape_quotes -- Deprecated.
|
|
"""
|
|
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.srv_support = SRV_SUPPORT
|
|
|
|
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 = []
|
|
self.registered_features = []
|
|
|
|
#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.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))
|
|
|
|
self.register_feature(
|
|
"<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls' />",
|
|
self._handle_starttls, True)
|
|
self.register_feature(
|
|
"<mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl' />",
|
|
self._handle_sasl_auth, True)
|
|
self.register_feature(
|
|
"<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind' />",
|
|
self._handle_bind_resource)
|
|
self.register_feature(
|
|
"<session xmlns='urn:ietf:params:xml:ns:xmpp-session' />",
|
|
self._handle_start_session)
|
|
|
|
def handle_connected(self, event=None):
|
|
#TODO: Use stream state here
|
|
self.authenticated = False
|
|
self.sessionstarted = False
|
|
self.bound = False
|
|
self.bindfail = False
|
|
self.schedule("session timeout checker", 15,
|
|
self._session_timeout_check)
|
|
|
|
def _session_timeout_check(self):
|
|
if not self.session_started_event.isSet():
|
|
log.debug("Session start has taken more than 15 seconds")
|
|
self.disconnect(reconnect=self.auto_reconnect)
|
|
|
|
def connect(self, address=tuple(), reattempt=True, use_tls=True):
|
|
"""
|
|
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.
|
|
|
|
Arguments:
|
|
address -- A tuple containing the server's host and port.
|
|
reattempt -- If True, reattempt the connection if an
|
|
error occurs. Defaults to True.
|
|
use_tls -- Indicates if TLS should be used for the
|
|
connection. Defaults to True.
|
|
"""
|
|
self.session_started_event.clear()
|
|
if not address or len(address) < 2:
|
|
if not self.srv_support:
|
|
log.debug("Did not supply (address, port) to connect" + \
|
|
" to and no SRV support is installed" + \
|
|
" (http://www.dnspython.org)." + \
|
|
" Continuing to attempt connection, using" + \
|
|
" server hostname from JID.")
|
|
else:
|
|
log.debug("Since no address is supplied," + \
|
|
"attempting SRV lookup.")
|
|
try:
|
|
xmpp_srv = "_xmpp-client._tcp.%s" % self.boundjid.host
|
|
answers = dns.resolver.query(xmpp_srv, dns.rdatatype.SRV)
|
|
except (dns.resolver.NXDOMAIN, dns.resolver.NoAnswer):
|
|
log.debug("No appropriate SRV record found." + \
|
|
" Using JID server name.")
|
|
except (dns.exception.Timeout,):
|
|
log.debug("DNS resolution timed out.")
|
|
else:
|
|
# Pick a random server, weighted by priority.
|
|
|
|
addresses = {}
|
|
intmax = 0
|
|
topprio = 65535
|
|
for answer in answers:
|
|
topprio = min(topprio, answer.priority)
|
|
for answer in answers:
|
|
if answer.priority == topprio:
|
|
intmax += answer.weight
|
|
addresses[intmax] = (answer.target.to_text()[:-1],
|
|
answer.port)
|
|
|
|
#python3 returns a generator for dictionary keys
|
|
items = [x for x in addresses.keys()]
|
|
items.sort()
|
|
|
|
picked = random.randint(0, intmax)
|
|
for item in items:
|
|
if picked <= item:
|
|
address = addresses[item]
|
|
break
|
|
|
|
if not address:
|
|
# If all else fails, use the server from the JID.
|
|
address = (self.boundjid.host, 5222)
|
|
|
|
return XMLStream.connect(self, address[0], address[1],
|
|
use_tls=use_tls, reattempt=reattempt)
|
|
|
|
def register_feature(self, mask, pointer, breaker=False):
|
|
"""
|
|
Register a stream feature.
|
|
|
|
Arguments:
|
|
mask -- An XML string matching the feature's element.
|
|
pointer -- The function to execute if the feature is received.
|
|
breaker -- Indicates if feature processing should halt with
|
|
this feature. Defaults to False.
|
|
"""
|
|
self.registered_features.append((MatchXMLMask(mask),
|
|
pointer,
|
|
breaker))
|
|
|
|
def update_roster(self, jid, name=None, subscription=None, groups=[],
|
|
block=True, timeout=None, callback=None):
|
|
"""
|
|
Add or change a roster item.
|
|
|
|
Arguments:
|
|
jid -- The JID of the entry to modify.
|
|
name -- The user's nickname for this JID.
|
|
subscription -- The subscription status. May be one of
|
|
'to', 'from', 'both', or 'none'. If set
|
|
to 'remove', the entry will be deleted.
|
|
groups -- The roster groups that contain this item.
|
|
block -- Specify if the roster request will block
|
|
until a response is received, or a timeout
|
|
occurs. Defaults to True.
|
|
timeout -- The length of time (in seconds) to wait
|
|
for a response before continuing if blocking
|
|
is used. Defaults to self.response_timeout.
|
|
callback -- Optional reference to a stream handler function.
|
|
Will be executed when the roster is received.
|
|
Implies block=False.
|
|
"""
|
|
return self.client_roster.updtae(jid, name, subscription, groups,
|
|
block, timeout, callback)
|
|
|
|
def del_roster_item(self, jid):
|
|
"""
|
|
Remove an item from the roster by setting its subscription
|
|
status to 'remove'.
|
|
|
|
Arguments:
|
|
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.
|
|
|
|
Arguments:
|
|
block -- Specify if the roster request will block until a
|
|
response is received, or a timeout occurs.
|
|
Defaults to True.
|
|
timeout -- The length of time (in seconds) to wait for a response
|
|
before continuing if blocking is used.
|
|
Defaults to self.response_timeout.
|
|
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')
|
|
response = iq.send(block, timeout, callback)
|
|
|
|
if response == False:
|
|
self.event('roster_timeout')
|
|
|
|
if response in [False, None] or not isinstance(response, Iq):
|
|
return response
|
|
else:
|
|
return self._handle_roster(response, request=True)
|
|
|
|
def _handle_stream_features(self, features):
|
|
"""
|
|
Process the received stream features.
|
|
|
|
Arguments:
|
|
features -- The features stanza.
|
|
"""
|
|
# Record all of the features.
|
|
self.features = []
|
|
for sub in features.xml:
|
|
self.features.append(sub.tag)
|
|
|
|
# Process the features.
|
|
for sub in features.xml:
|
|
for feature in self.registered_features:
|
|
mask, handler, halt = feature
|
|
if mask.match(sub):
|
|
if handler(sub) and halt:
|
|
# Don't continue if the feature was
|
|
# marked as a breaker.
|
|
return True
|
|
|
|
def _handle_starttls(self, xml):
|
|
"""
|
|
Handle notification that the server supports TLS.
|
|
|
|
Arguments:
|
|
xml -- The STARTLS proceed element.
|
|
"""
|
|
if not self.use_tls:
|
|
return False
|
|
elif not self.authenticated and self.ssl_support:
|
|
tls_ns = 'urn:ietf:params:xml:ns:xmpp-tls'
|
|
self.add_handler("<proceed xmlns='%s' />" % tls_ns,
|
|
self._handle_tls_start,
|
|
name='TLS Proceed',
|
|
instream=True)
|
|
self.send_xml(xml, now=True)
|
|
return True
|
|
else:
|
|
log.warning("The module tlslite is required to log in" +\
|
|
" to some servers, and has not been found.")
|
|
return False
|
|
|
|
def _handle_tls_start(self, xml):
|
|
"""
|
|
Handle encrypting the stream using TLS.
|
|
|
|
Restarts the stream.
|
|
"""
|
|
log.debug("Starting TLS")
|
|
if self.start_tls():
|
|
raise RestartStream()
|
|
|
|
def _handle_sasl_auth(self, xml):
|
|
"""
|
|
Handle authenticating using SASL.
|
|
|
|
Arguments:
|
|
xml -- The SASL mechanisms stanza.
|
|
"""
|
|
if self.use_tls and \
|
|
'{urn:ietf:params:xml:ns:xmpp-tls}starttls' in self.features:
|
|
return False
|
|
|
|
log.debug("Starting SASL Auth")
|
|
sasl_ns = 'urn:ietf:params:xml:ns:xmpp-sasl'
|
|
self.add_handler("<success xmlns='%s' />" % sasl_ns,
|
|
self._handle_auth_success,
|
|
name='SASL Sucess',
|
|
instream=True)
|
|
self.add_handler("<failure xmlns='%s' />" % sasl_ns,
|
|
self._handle_auth_fail,
|
|
name='SASL Failure',
|
|
instream=True)
|
|
|
|
sasl_mechs = xml.findall('{%s}mechanism' % sasl_ns)
|
|
if sasl_mechs:
|
|
for sasl_mech in sasl_mechs:
|
|
self.features.append("sasl:%s" % sasl_mech.text)
|
|
if 'sasl:PLAIN' in self.features and self.boundjid.user:
|
|
if sys.version_info < (3, 0):
|
|
user = bytes(self.boundjid.user)
|
|
password = bytes(self.password)
|
|
else:
|
|
user = bytes(self.boundjid.user, 'utf-8')
|
|
password = bytes(self.password, 'utf-8')
|
|
|
|
auth = base64.b64encode(b'\x00' + user + \
|
|
b'\x00' + password).decode('utf-8')
|
|
|
|
self.send("<auth xmlns='%s' mechanism='PLAIN'>%s</auth>" % (
|
|
sasl_ns,
|
|
auth),
|
|
now=True)
|
|
elif 'sasl:ANONYMOUS' in self.features and not self.boundjid.user:
|
|
self.send("<auth xmlns='%s' mechanism='%s' />" % (
|
|
sasl_ns,
|
|
'ANONYMOUS'),
|
|
now=True)
|
|
else:
|
|
log.error("No appropriate login method.")
|
|
self.disconnect()
|
|
return True
|
|
|
|
def _handle_auth_success(self, xml):
|
|
"""
|
|
SASL authentication succeeded. Restart the stream.
|
|
|
|
Arguments:
|
|
xml -- The SASL authentication success element.
|
|
"""
|
|
self.authenticated = True
|
|
self.features = []
|
|
raise RestartStream()
|
|
|
|
def _handle_auth_fail(self, xml):
|
|
"""
|
|
SASL authentication failed. Disconnect and shutdown.
|
|
|
|
Arguments:
|
|
xml -- The SASL authentication failure element.
|
|
"""
|
|
log.info("Authentication failed.")
|
|
self.event("failed_auth", direct=True)
|
|
self.disconnect()
|
|
|
|
def _handle_bind_resource(self, xml):
|
|
"""
|
|
Handle requesting a specific resource.
|
|
|
|
Arguments:
|
|
xml -- The bind feature element.
|
|
"""
|
|
log.debug("Requesting resource: %s" % self.boundjid.resource)
|
|
xml.clear()
|
|
iq = self.Iq(stype='set')
|
|
if self.boundjid.resource:
|
|
res = ET.Element('resource')
|
|
res.text = self.boundjid.resource
|
|
xml.append(res)
|
|
iq.append(xml)
|
|
response = iq.send(now=True)
|
|
|
|
bind_ns = 'urn:ietf:params:xml:ns:xmpp-bind'
|
|
self.set_jid(response.xml.find('{%s}bind/{%s}jid' % (bind_ns,
|
|
bind_ns)).text)
|
|
self.bound = True
|
|
log.info("Node set to: %s" % self.boundjid.full)
|
|
session_ns = 'urn:ietf:params:xml:ns:xmpp-session'
|
|
if "{%s}session" % session_ns not in self.features or self.bindfail:
|
|
log.debug("Established Session")
|
|
self.sessionstarted = True
|
|
self.session_started_event.set()
|
|
self.event("session_start")
|
|
|
|
def _handle_start_session(self, xml):
|
|
"""
|
|
Handle the start of the session.
|
|
|
|
Arguments:
|
|
xml -- The session feature element.
|
|
"""
|
|
if self.authenticated and self.bound:
|
|
iq = self.makeIqSet(xml)
|
|
response = iq.send(now=True)
|
|
log.debug("Established Session")
|
|
self.sessionstarted = True
|
|
self.session_started_event.set()
|
|
self.event("session_start")
|
|
else:
|
|
# Bind probably hasn't happened yet.
|
|
self.bindfail = True
|
|
|
|
def _handle_roster(self, iq, request=False):
|
|
"""
|
|
Update the roster after receiving a roster stanza.
|
|
|
|
Arguments:
|
|
iq -- The roster stanza.
|
|
request -- Indicates if this stanza is a response
|
|
to a request for the roster.
|
|
"""
|
|
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()
|
|
return True
|
|
|
|
|
|
# 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
|