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-rw-r--r--sleekxmpp/plugins/xep_0095/stream_initiation.py214
1 files changed, 214 insertions, 0 deletions
diff --git a/sleekxmpp/plugins/xep_0095/stream_initiation.py b/sleekxmpp/plugins/xep_0095/stream_initiation.py
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+++ b/sleekxmpp/plugins/xep_0095/stream_initiation.py
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+"""
+ SleekXMPP: The Sleek XMPP Library
+ Copyright (C) 2013 Nathanael C. Fritz, Lance J.T. Stout
+ This file is part of SleekXMPP.
+
+ See the file LICENSE for copying permission.
+"""
+
+import logging
+import threading
+
+from uuid import uuid4
+
+from sleekxmpp import Iq, Message
+from sleekxmpp.exceptions import XMPPError
+from sleekxmpp.plugins import BasePlugin
+from sleekxmpp.xmlstream.handler import Callback
+from sleekxmpp.xmlstream.matcher import StanzaPath
+from sleekxmpp.xmlstream import register_stanza_plugin, JID
+from sleekxmpp.plugins.xep_0095 import stanza, SI
+
+
+log = logging.getLogger(__name__)
+
+
+SOCKS5 = 'http://jabber.org/protocol/bytestreams'
+IBB = 'http://jabber.org/protocol/ibb'
+
+
+class XEP_0095(BasePlugin):
+
+ name = 'xep_0095'
+ description = 'XEP-0095: Stream Initiation'
+ dependencies = set(['xep_0020', 'xep_0030', 'xep_0047', 'xep_0065'])
+ stanza = stanza
+
+ def plugin_init(self):
+ self._profiles = {}
+ self._methods = {}
+ self._methods_order = []
+ self._pending_lock = threading.Lock()
+ self._pending= {}
+
+ self.register_method(SOCKS5, 'xep_0065', 100)
+ self.register_method(IBB, 'xep_0047', 50)
+
+ register_stanza_plugin(Iq, SI)
+ register_stanza_plugin(SI, self.xmpp['xep_0020'].stanza.FeatureNegotiation)
+
+ self.xmpp.register_handler(
+ Callback('SI Request',
+ StanzaPath('iq@type=set/si'),
+ self._handle_request))
+
+ self.api.register(self._add_pending, 'add_pending', default=True)
+ self.api.register(self._get_pending, 'get_pending', default=True)
+ self.api.register(self._del_pending, 'del_pending', default=True)
+
+ def session_bind(self, jid):
+ self.xmpp['xep_0030'].add_feature(SI.namespace)
+
+ def plugin_end(self):
+ self.xmpp.remove_handler('SI Request')
+ self.xmpp['xep_0030'].del_feature(feature=SI.namespace)
+
+ def register_profile(self, profile_name, plugin):
+ self._profiles[profile_name] = plugin
+
+ def unregister_profile(self, profile_name):
+ try:
+ del self._profiles[profile_name]
+ except KeyError:
+ pass
+
+ def register_method(self, method, plugin_name, order=50):
+ self._methods[method] = (plugin_name, order)
+ self._methods_order.append((order, method, plugin_name))
+ self._methods_order.sort()
+
+ def unregister_method(self, method):
+ if method in self._methods:
+ plugin_name, order = self._methods[method]
+ del self._methods[method]
+ self._methods_order.remove((order, method, plugin_name))
+ self._methods_order.sort()
+
+ def _handle_request(self, iq):
+ profile = iq['si']['profile']
+ sid = iq['si']['id']
+
+ if not sid:
+ raise XMPPError(etype='modify', condition='bad-request')
+ if profile not in self._profiles:
+ raise XMPPError(
+ etype='modify',
+ condition='bad-request',
+ extension='bad-profile',
+ extension_ns=SI.namespace)
+
+ neg = iq['si']['feature_neg']['form']['fields']
+ options = neg['stream-method']['options'] or []
+ methods = []
+ for opt in options:
+ methods.append(opt['value'])
+ for method in methods:
+ if method in self._methods:
+ supported = True
+ break
+ else:
+ raise XMPPError('bad-request',
+ extension='no-valid-streams',
+ extension_ns=SI.namespace)
+
+ selected_method = None
+ log.debug('Available: %s', methods)
+ for order, method, plugin in self._methods_order:
+ log.debug('Testing: %s', method)
+ if method in methods:
+ selected_method = method
+ break
+
+ receiver = iq['to']
+ sender = iq['from']
+
+ self.api['add_pending'](receiver, sid, sender, {
+ 'response_id': iq['id'],
+ 'method': selected_method,
+ 'profile': profile
+ })
+ self.xmpp.event('si_request', iq)
+
+ def offer(self, jid, sid=None, mime_type=None, profile=None,
+ methods=None, payload=None, ifrom=None,
+ **iqargs):
+ if sid is None:
+ sid = uuid4().hex
+ if methods is None:
+ methods = list(self._methods.keys())
+ if not isinstance(methods, (list, tuple, set)):
+ methods = [methods]
+
+ si = self.xmpp.Iq()
+ si['to'] = jid
+ si['from'] = ifrom
+ si['type'] = 'set'
+ si['si']['id'] = sid
+ si['si']['mime_type'] = mime_type
+ si['si']['profile'] = profile
+ if not isinstance(payload, (list, tuple, set)):
+ payload = [payload]
+ for item in payload:
+ si['si'].append(item)
+ si['si']['feature_neg']['form'].add_field(
+ var='stream-method',
+ ftype='list-single',
+ options=methods)
+ return si.send(**iqargs)
+
+ def accept(self, jid, sid, payload=None, ifrom=None, stream_handler=None):
+ stream = self.api['get_pending'](ifrom, sid, jid)
+ iq = self.xmpp.Iq()
+ iq['id'] = stream['response_id']
+ iq['to'] = jid
+ iq['from'] = ifrom
+ iq['type'] = 'result'
+ if payload:
+ iq['si'].append(payload)
+ iq['si']['feature_neg']['form']['type'] = 'submit'
+ iq['si']['feature_neg']['form'].add_field(
+ var='stream-method',
+ ftype='list-single',
+ value=stream['method'])
+
+ if ifrom is None:
+ ifrom = self.xmpp.boundjid
+
+ method_plugin = self._methods[stream['method']][0]
+ self.xmpp[method_plugin].api['preauthorize_sid'](ifrom, sid, jid)
+
+ self.api['del_pending'](ifrom, sid, jid)
+
+ if stream_handler:
+ self.xmpp.add_event_handler('stream:%s:%s' % (sid, jid),
+ stream_handler,
+ threaded=True,
+ disposable=True)
+ return iq.send()
+
+ def decline(self, jid, sid, ifrom=None):
+ stream = self.api['get_pending'](ifrom, sid, jid)
+ if not stream:
+ return
+ iq = self.xmpp.Iq()
+ iq['id'] = stream['response_id']
+ iq['to'] = jid
+ iq['from'] = ifrom
+ iq['type'] = 'error'
+ iq['error']['condition'] = 'forbidden'
+ iq['error']['text'] = 'Offer declined'
+ self.api['del_pending'](ifrom, sid, jid)
+ return iq.send()
+
+ def _add_pending(self, jid, node, ifrom, data):
+ with self._pending_lock:
+ self._pending[(jid, node, ifrom)] = data
+
+ def _get_pending(self, jid, node, ifrom, data):
+ with self._pending_lock:
+ return self._pending.get((jid, node, ifrom), None)
+
+ def _del_pending(self, jid, node, ifrom, data):
+ with self._pending_lock:
+ if (jid, node, ifrom) in self._pending:
+ del self._pending[(jid, node, ifrom)]