142 lines
4.7 KiB
Python
142 lines
4.7 KiB
Python
"""
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SleekXMPP: The Sleek XMPP Library
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Copyright (C) 2010 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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from __future__ import absolute_import
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import logging
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import base64
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import sys
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import hashlib
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from sleekxmpp import plugins
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from sleekxmpp import stanza
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from sleekxmpp.basexmpp import BaseXMPP
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from sleekxmpp.xmlstream import XMLStream, RestartStream
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from sleekxmpp.xmlstream import StanzaBase, ET
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from sleekxmpp.xmlstream.matcher import *
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from sleekxmpp.xmlstream.handler import *
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log = logging.getLogger(__name__)
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class ComponentXMPP(BaseXMPP):
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"""
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SleekXMPP's basic XMPP server component.
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Use only for good, not for evil.
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Methods:
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connect -- Overrides XMLStream.connect.
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incoming_filter -- Overrides XMLStream.incoming_filter.
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start_stream_handler -- Overrides XMLStream.start_stream_handler.
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"""
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def __init__(self, jid, secret, host, port,
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plugin_config={}, plugin_whitelist=[], use_jc_ns=False):
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"""
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Arguments:
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jid -- The JID of the component.
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secret -- The secret or password for the component.
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host -- The server accepting the component.
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port -- The port used to connect to the server.
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plugin_config -- A dictionary of plugin configurations.
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plugin_whitelist -- A list of desired plugins to load
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when using register_plugins.
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use_js_ns -- Indicates if the 'jabber:client' namespace
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should be used instead of the standard
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'jabber:component:accept' namespace.
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Defaults to False.
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"""
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if use_jc_ns:
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default_ns = 'jabber:client'
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else:
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default_ns = 'jabber:component:accept'
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BaseXMPP.__init__(self, default_ns)
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self.auto_authorize = None
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self.stream_header = "<stream:stream %s %s to='%s'>" % (
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'xmlns="jabber:component:accept"',
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'xmlns:stream="%s"' % self.stream_ns,
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jid)
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self.stream_footer = "</stream:stream>"
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self.server_host = host
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self.server_port = port
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self.set_jid(jid)
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self.secret = secret
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self.plugin_config = plugin_config
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self.plugin_whitelist = plugin_whitelist
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self.is_component = True
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self.register_handler(
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Callback('Handshake',
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MatchXPath('{jabber:component:accept}handshake'),
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self._handle_handshake))
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def connect(self):
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"""
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Connect to the server.
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Overrides XMLStream.connect.
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"""
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log.debug("Connecting to %s:%s" % (self.server_host,
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self.server_port))
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return XMLStream.connect(self, self.server_host,
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self.server_port)
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def incoming_filter(self, xml):
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"""
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Pre-process incoming XML stanzas by converting any 'jabber:client'
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namespaced elements to the component's default namespace.
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Overrides XMLStream.incoming_filter.
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Arguments:
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xml -- The XML stanza to pre-process.
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"""
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if xml.tag.startswith('{jabber:client}'):
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xml.tag = xml.tag.replace('jabber:client', self.default_ns)
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# The incoming_filter call is only made on top level stanza
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# elements. So we manually continue filtering on sub-elements.
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for sub in xml:
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self.incoming_filter(sub)
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return xml
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def start_stream_handler(self, xml):
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"""
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Once the streams are established, attempt to handshake
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with the server to be accepted as a component.
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Overrides XMLStream.start_stream_handler.
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Arguments:
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xml -- The incoming stream's root element.
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"""
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# Construct a hash of the stream ID and the component secret.
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sid = xml.get('id', '')
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pre_hash = '%s%s' % (sid, self.secret)
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if sys.version_info >= (3, 0):
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# Handle Unicode byte encoding in Python 3.
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pre_hash = bytes(pre_hash, 'utf-8')
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handshake = ET.Element('{jabber:component:accept}handshake')
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handshake.text = hashlib.sha1(pre_hash).hexdigest().lower()
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self.send_xml(handshake, now=True)
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def _handle_handshake(self, xml):
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"""
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The handshake has been accepted.
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Arguments:
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xml -- The reply handshake stanza.
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"""
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self.session_started_event.set()
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self.event("session_start")
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