gajim-plural/gajim/common/modules/caps.py

161 lines
5.7 KiB
Python

# Copyright (C) 2009 Stephan Erb <steve-e AT h3c.de>
#
# This file is part of Gajim.
#
# Gajim is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published
# by the Free Software Foundation; version 3 only.
#
# Gajim 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
# XEP-0115: Entity Capabilities
import logging
import nbxmpp
from gajim.common import caps_cache
from gajim.common import app
from gajim.common.nec import NetworkEvent
from gajim.common.modules.presence import parse_show
from gajim.common.modules.presence import parse_type
log = logging.getLogger('gajim.c.m.caps')
class Caps:
def __init__(self, con):
self._con = con
self._account = con.name
self.handlers = [
('presence', self._presence_received, '', nbxmpp.NS_CAPS)
]
self._capscache = caps_cache.capscache
self._create_suitable_client_caps = caps_cache.create_suitable_client_caps
def _presence_received(self, _con, stanza):
if stanza.getType() in ('unavailable', 'error'):
return
from_ = stanza.getFrom()
if from_ is None:
# Presence from ourself
return
full_jid = str(from_)
hash_method = node = caps_hash = None
caps = stanza.getTag('c', namespace=nbxmpp.NS_CAPS)
if caps is not None:
hash_method = caps['hash']
node = caps['node']
caps_hash = caps['ver']
show = parse_show(stanza)
type_ = parse_type(stanza)
log.info('Received from %s, type: %s, method: %s, node: %s, hash: %s',
from_, stanza.getType(), hash_method, node, caps_hash)
client_caps = self._create_suitable_client_caps(
node, caps_hash, hash_method, full_jid)
# Type is None means 'available'
if stanza.getType() is None and client_caps._hash_method == 'no':
self._capscache.forget_caps(client_caps)
client_caps = self._create_suitable_client_caps(
node, caps_hash, hash_method)
else:
self._capscache.query_client_of_jid_if_unknown(
self._con, full_jid, client_caps)
self._update_client_caps_of_contact(from_, client_caps)
# Event is only used by ClientIcons Plugin
app.nec.push_incoming_event(
NetworkEvent('caps-presence-received',
conn=self._con,
fjid=full_jid,
jid=from_.getStripped(),
resource=from_.getResource(),
hash_method=hash_method,
node=node,
caps_hash=caps_hash,
client_caps=client_caps,
show=show,
ptype=type_,
stanza=stanza))
app.nec.push_incoming_event(NetworkEvent('caps-update',
conn=self._con,
fjid=full_jid,
jid=from_.getStripped()))
def _update_client_caps_of_contact(self, from_, client_caps):
contact = self._get_contact_or_gc_contact_for_jid(from_)
if contact is not None:
contact.client_caps = client_caps
else:
log.info('Received Caps from unknown contact %s', from_)
def _get_contact_or_gc_contact_for_jid(self, from_):
contact = app.contacts.get_contact_from_full_jid(self._account,
str(from_))
if contact is None:
room_jid, resource = from_.getStripped(), from_.getResource()
contact = app.contacts.get_gc_contact(
self._account, room_jid, resource)
return contact
def contact_info_received(self, from_, identities, features, data, node):
"""
callback to update our caps cache with queried information after
we have retrieved an unknown caps hash via a disco
"""
bare_jid = from_.getStripped()
contact = self._get_contact_or_gc_contact_for_jid(from_)
if not contact:
log.info('Received Disco from unknown contact %s', from_)
return
lookup = contact.client_caps.get_cache_lookup_strategy()
cache_item = lookup(self._capscache)
if cache_item.is_valid():
# we already know that the hash is fine and have already cached
# the identities and features
return
validate = contact.client_caps.get_hash_validation_strategy()
hash_is_valid = validate(identities, features, data)
if hash_is_valid:
cache_item.set_and_store(identities, features)
else:
node = caps_hash = hash_method = None
contact.client_caps = self._create_suitable_client_caps(
node, caps_hash, hash_method)
log.warning(
'Computed and retrieved caps hash differ. Ignoring '
'caps of contact %s', contact.get_full_jid())
app.nec.push_incoming_event(
NetworkEvent('caps-update',
conn=self._con,
fjid=str(from_),
jid=bare_jid))
def get_instance(*args, **kwargs):
return Caps(*args, **kwargs), 'Caps'