Mercurial > libervia-backend
view src/plugins/plugin_xep_0115.py @ 1727:68e498b3367e
reverted revision 2ebe66a96d05
author | souliane <souliane@mailoo.org> |
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date | Tue, 08 Dec 2015 16:55:54 +0100 |
parents | e0bde0d0b321 |
children | d17772b0fe22 |
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#!/usr/bin/python # -*- coding: utf-8 -*- # SAT plugin for managing xep-0115 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Jérôme Poisson (goffi@goffi.org) # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. from sat.core.i18n import _ from sat.core.constants import Const as C from sat.core.log import getLogger log = getLogger(__name__) from twisted.words.xish import domish from twisted.words.protocols.jabber import jid from twisted.internet import defer, error from zope.interface import implements from wokkel import disco, iwokkel try: from twisted.words.protocols.xmlstream import XMPPHandler except ImportError: from wokkel.subprotocols import XMPPHandler PRESENCE = '/presence' NS_ENTITY_CAPABILITY = 'http://jabber.org/protocol/caps' NS_CAPS_OPTIMIZE = 'http://jabber.org/protocol/caps#optimize' CAPABILITY_UPDATE = PRESENCE + '/c[@xmlns="' + NS_ENTITY_CAPABILITY + '"]' PLUGIN_INFO = { "name": "XEP 0115 Plugin", "import_name": "XEP-0115", "type": "XEP", "protocols": ["XEP-0115"], "dependencies": [], "main": "XEP_0115", "handler": "yes", "description": _("""Implementation of entity capabilities""") } class XEP_0115(object): cap_hash = None # capabilities hash is class variable as it is common to all profiles def __init__(self, host): log.info(_("Plugin XEP_0115 initialization")) self.host = host host.trigger.add("Disco handled", self._checkHash) host.trigger.add("Presence send", self._presenceTrigger) def getHandler(self, profile): return XEP_0115_handler(self, profile) def _checkHash(self, disco_d, profile): client = self.host.getClient(profile) client.caps_optimize = None if XEP_0115.cap_hash is None: disco_d.addCallback(lambda dummy: self.host.hasFeature(NS_CAPS_OPTIMIZE, profile=profile)) def updateOptimize(optimize): client.caps_optimize = optimize if optimize: log.info(_("Caps optimisation enabled")) client.caps_sent = False else: log.warning(_("Caps optimisation not available")) disco_d.addCallback(updateOptimize) disco_d.addCallback(lambda dummy: self.recalculateHash(profile)) return True def _presenceTrigger(self, client, obj): if XEP_0115.cap_hash is not None: if client.caps_optimize: if client.caps_sent: return True client.caps_sent = True obj.addChild(XEP_0115.c_elt) return True @defer.inlineCallbacks def recalculateHash(self, profile): client = self.host.getClient(profile) _infos = yield client.discoHandler.info(client.jid, client.jid, '') disco_infos = disco.DiscoInfo() for item in _infos: disco_infos.append(item) cap_hash = self.host.memory.disco.generateHash(disco_infos) log.info("Our capability hash has been generated: [%s]" % cap_hash) log.debug("Generating capability domish.Element") c_elt = domish.Element((NS_ENTITY_CAPABILITY, 'c')) c_elt['hash'] = 'sha-1' c_elt['node'] = C.APP_URL c_elt['ver'] = cap_hash XEP_0115.cap_hash = cap_hash XEP_0115.c_elt = c_elt if client.caps_optimize: client.caps_sent = False if cap_hash not in self.host.memory.disco.hashes: self.host.memory.disco.hashes[cap_hash] = disco_infos self.host.memory.updateEntityData(client.jid, C.ENTITY_CAP_HASH, cap_hash, profile_key=profile) class XEP_0115_handler(XMPPHandler): implements(iwokkel.IDisco) def __init__(self, plugin_parent, profile): self.plugin_parent = plugin_parent self.host = plugin_parent.host self.profile = profile def connectionInitialized(self): self.xmlstream.addObserver(CAPABILITY_UPDATE, self.update) def getDiscoInfo(self, requestor, target, nodeIdentifier=''): return [disco.DiscoFeature(NS_ENTITY_CAPABILITY), disco.DiscoFeature(NS_CAPS_OPTIMIZE)] def getDiscoItems(self, requestor, target, nodeIdentifier=''): return [] def update(self, presence): """ Manage the capabilities of the entity Check if we know the version of this capabilities and get the capabilities if necessary """ from_jid = jid.JID(presence['from']) c_elem = presence.elements(NS_ENTITY_CAPABILITY, 'c').next() try: c_ver = c_elem['ver'] c_hash = c_elem['hash'] c_node = c_elem['node'] except KeyError: log.warning(_(u'Received invalid capabilities tag: %s') % c_elem.toXml()) return if c_ver in self.host.memory.disco.hashes: # we already know the hash, we update the jid entity log.debug(u"hash [%(hash)s] already in cache, updating entity [%(jid)s]" % {'hash': c_ver, 'jid': from_jid.full()}) self.host.memory.updateEntityData(from_jid, C.ENTITY_CAP_HASH, c_ver, profile_key=self.profile) return if c_hash != 'sha-1': # unknown hash method log.warning(_(u'Unknown hash method for entity capabilities: [%(hash_method)s] (entity: %(jid)s, node: %(node)s)') % {'hash_method':c_hash, 'jid': from_jid, 'node': c_node}) def cb(dummy): computed_hash = self.host.memory.getEntityDatum(from_jid, C.ENTITY_CAP_HASH, self.profile) if computed_hash != c_ver: log.warning(_(u'Computed hash differ from given hash:\ngiven: [%(given_hash)s]\ncomputed: [%(computed_hash)s]\n(entity: %(jid)s, node: %(node)s)') % {'given_hash':c_ver, 'computed_hash': computed_hash, 'jid': from_jid, 'node': c_node}) def eb(failure): if isinstance(failure.value, error.ConnectionDone): return msg = failure.value.condition if hasattr(failure.value, 'condition') else failure.getErrorMessage() log.error(_(u"Couldn't retrieve disco info for {jid}: {error}").format(jid=from_jid.full(), error=msg)) d = self.host.getDiscoInfos(from_jid, self.profile) d.addCallbacks(cb, eb) # TODO: me must manage the full algorithm described at XEP-0115 #5.4 part 3