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"""
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
import logging
import base64
import sys
import hashlib
from sleekxmpp import plugins
from sleekxmpp import stanza
from sleekxmpp.basexmpp import BaseXMPP
from sleekxmpp.xmlstream import XMLStream, RestartStream
from sleekxmpp.xmlstream import StanzaBase, ET
from sleekxmpp.xmlstream.matcher import *
from sleekxmpp.xmlstream.handler import *
log = logging.getLogger(__name__)
class ComponentXMPP(BaseXMPP):
"""
SleekXMPP's basic XMPP server component.
Use only for good, not for evil.
Methods:
connect -- Overrides XMLStream.connect.
incoming_filter -- Overrides XMLStream.incoming_filter.
start_stream_handler -- Overrides XMLStream.start_stream_handler.
"""
def __init__(self, jid, secret, host, port,
plugin_config={}, plugin_whitelist=[], use_jc_ns=False):
"""
Arguments:
jid -- The JID of the component.
secret -- The secret or password for the component.
host -- The server accepting the component.
port -- The port used to connect to the server.
plugin_config -- A dictionary of plugin configurations.
plugin_whitelist -- A list of desired plugins to load
when using register_plugins.
use_js_ns -- Indicates if the 'jabber:client' namespace
should be used instead of the standard
'jabber:component:accept' namespace.
Defaults to False.
"""
if use_jc_ns:
default_ns = 'jabber:client'
else:
default_ns = 'jabber:component:accept'
BaseXMPP.__init__(self, jid, default_ns)
self.auto_authorize = None
self.stream_header = "<stream:stream %s %s to='%s'>" % (
'xmlns="jabber:component:accept"',
'xmlns:stream="%s"' % self.stream_ns,
jid)
self.stream_footer = "</stream:stream>"
self.server_host = host
self.server_port = port
self.secret = secret
self.plugin_config = plugin_config
self.plugin_whitelist = plugin_whitelist
self.is_component = True
self.register_handler(
Callback('Handshake',
MatchXPath('{jabber:component:accept}handshake'),
self._handle_handshake))
self.add_event_handler('presence_probe',
self._handle_probe)
def connect(self):
"""
Connect to the server.
Overrides XMLStream.connect.
"""
log.debug("Connecting to %s:%s", self.server_host,
self.server_port)
return XMLStream.connect(self, self.server_host,
self.server_port)
def incoming_filter(self, xml):
"""
Pre-process incoming XML stanzas by converting any 'jabber:client'
namespaced elements to the component's default namespace.
Overrides XMLStream.incoming_filter.
Arguments:
xml -- The XML stanza to pre-process.
"""
if xml.tag.startswith('{jabber:client}'):
xml.tag = xml.tag.replace('jabber:client', self.default_ns)
# The incoming_filter call is only made on top level stanza
# elements. So we manually continue filtering on sub-elements.
for sub in xml:
self.incoming_filter(sub)
return xml
def start_stream_handler(self, xml):
"""
Once the streams are established, attempt to handshake
with the server to be accepted as a component.
Overrides BaseXMPP.start_stream_handler.
Arguments:
xml -- The incoming stream's root element.
"""
BaseXMPP.start_stream_handler(self, xml)
# Construct a hash of the stream ID and the component secret.
sid = xml.get('id', '')
pre_hash = '%s%s' % (sid, self.secret)
if sys.version_info >= (3, 0):
# Handle Unicode byte encoding in Python 3.
pre_hash = bytes(pre_hash, 'utf-8')
handshake = ET.Element('{jabber:component:accept}handshake')
handshake.text = hashlib.sha1(pre_hash).hexdigest().lower()
self.send_xml(handshake, now=True)
def _handle_handshake(self, xml):
"""
The handshake has been accepted.
Arguments:
xml -- The reply handshake stanza.
"""
self.session_started_event.set()
self.event("session_start")
def _handle_probe(self, presence):
pto = presence['to'].bare
pfrom = presence['from'].bare
self.roster[pto][pfrom].handle_probe(presence)
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