153 lines
5.5 KiB
Python
153 lines
5.5 KiB
Python
# Copyright (C) 2009 Stephan Erb <steve-e AT h3c.de>
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#
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# This file is part of Gajim.
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#
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# Gajim is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published
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# by the Free Software Foundation; version 3 only.
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#
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# Gajim is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
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# XEP-0115: Entity Capabilities
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import logging
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import nbxmpp
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from gajim.common import caps_cache
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from gajim.common import app
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from gajim.common.nec import NetworkEvent
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from gajim.common.modules.presence import parse_show
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from gajim.common.modules.presence import parse_type
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log = logging.getLogger('gajim.c.m.caps')
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class Caps:
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def __init__(self, con):
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self._con = con
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self._account = con.name
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self.handlers = [
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('presence', self._presence_received, '', nbxmpp.NS_CAPS)
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]
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self._capscache = caps_cache.capscache
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self._create_suitable_client_caps = caps_cache.create_suitable_client_caps
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def _presence_received(self, _con, stanza):
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hash_method = node = caps_hash = None
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caps = stanza.getTag('c', namespace=nbxmpp.NS_CAPS)
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if caps is not None:
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hash_method = caps['hash']
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node = caps['node']
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caps_hash = caps['ver']
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from_ = stanza.getFrom()
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full_jid = str(from_)
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show = parse_show(stanza)
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type_ = parse_type(stanza)
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log.info('Received from %s, type: %s, method: %s, node: %s, hash: %s',
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from_, stanza.getType(), hash_method, node, caps_hash)
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client_caps = self._create_suitable_client_caps(
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node, caps_hash, hash_method, full_jid)
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# Type is None means 'available'
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if stanza.getType() is None and client_caps._hash_method == 'no':
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self._capscache.forget_caps(client_caps)
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client_caps = self._create_suitable_client_caps(
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node, caps_hash, hash_method)
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else:
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self._capscache.query_client_of_jid_if_unknown(
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self._con, full_jid, client_caps)
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self._update_client_caps_of_contact(from_, client_caps)
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# Event is only used by ClientIcons Plugin
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app.nec.push_incoming_event(
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NetworkEvent('caps-presence-received',
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conn=self._con,
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fjid=full_jid,
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jid=from_.getStripped(),
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resource=from_.getResource(),
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hash_method=hash_method,
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node=node,
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caps_hash=caps_hash,
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client_caps=client_caps,
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show=show,
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ptype=type_,
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stanza=stanza))
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app.nec.push_incoming_event(NetworkEvent('caps-update',
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conn=self._con,
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fjid=full_jid,
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jid=from_.getStripped()))
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def _update_client_caps_of_contact(self, from_, client_caps):
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contact = self._get_contact_or_gc_contact_for_jid(from_)
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if contact is not None:
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contact.client_caps = client_caps
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else:
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log.info('Received Caps from unknown contact %s', from_)
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def _get_contact_or_gc_contact_for_jid(self, from_):
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contact = app.contacts.get_contact_from_full_jid(self._account,
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str(from_))
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if contact is None:
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room_jid, resource = from_.getStripped(), from_.getResource()
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contact = app.contacts.get_gc_contact(
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self._account, room_jid, resource)
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return contact
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def contact_info_received(self, from_, identities, features, data, node):
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"""
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callback to update our caps cache with queried information after
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we have retrieved an unknown caps hash via a disco
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"""
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bare_jid = from_.getStripped()
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contact = self._get_contact_or_gc_contact_for_jid(from_)
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if not contact:
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log.info('Received Disco from unknown contact %s', from_)
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return
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lookup = contact.client_caps.get_cache_lookup_strategy()
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cache_item = lookup(self._capscache)
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if cache_item.is_valid():
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# we already know that the hash is fine and have already cached
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# the identities and features
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return
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validate = contact.client_caps.get_hash_validation_strategy()
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hash_is_valid = validate(identities, features, data)
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if hash_is_valid:
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cache_item.set_and_store(identities, features)
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else:
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node = caps_hash = hash_method = None
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contact.client_caps = self._create_suitable_client_caps(
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node, caps_hash, hash_method)
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log.warning(
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'Computed and retrieved caps hash differ. Ignoring '
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'caps of contact %s', contact.get_full_jid())
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app.nec.push_incoming_event(
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NetworkEvent('caps-update',
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conn=self._con,
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fjid=str(from_),
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jid=bare_jid))
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def get_instance(*args, **kwargs):
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return Caps(*args, **kwargs), 'Caps'
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