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# Copyright (C) 2018 Philipp Hörist <philipp AT hoerist.com>
#
# This file is part of nbxmpp.
#
# This program 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; 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; If not, see <http://www.gnu.org/licenses/>.
from nbxmpp.namespaces import Namespace
from nbxmpp.protocol import NodeProcessed
from nbxmpp.structs import StanzaHandler
from nbxmpp.structs import EntityCapsData
from nbxmpp.structs import DiscoInfo
from nbxmpp.util import compute_caps_hash
from nbxmpp.modules.base import BaseModule
class EntityCaps(BaseModule):
def __init__(self, client):
BaseModule.__init__(self, client)
self._client = client
self.handlers = [
StanzaHandler(name='presence',
callback=self._process_entity_caps,
ns=Namespace.CAPS,
priority=15),
StanzaHandler(name='iq',
callback=self._process_disco_info,
typ='get',
ns=Namespace.DISCO_INFO,
priority=20),
]
self._identities = []
self._features = []
self._uri = None
self._node = None
self._caps = None
self._caps_hash = None
def _process_disco_info(self, client, stanza, _properties):
if self._caps is None:
return
node = stanza.getQuerynode()
if node is not None:
if self._node != node:
return
iq = stanza.buildReply('result')
if node is not None:
iq.setQuerynode(node)
query = iq.getQuery()
for identity in self._caps.identities:
query.addChild(node=identity.get_node())
for feature in self._caps.features:
query.addChild('feature', attrs={'var': feature})
self._log.info('Respond with disco info')
client.send_stanza(iq)
raise NodeProcessed
def _process_entity_caps(self, _client, stanza, properties):
caps = stanza.getTag('c', namespace=Namespace.CAPS)
if caps is None:
return
hash_algo = caps.getAttr('hash')
if hash_algo != 'sha-1':
self._log.warning('Unsupported hashing algorithm used: %s',
hash_algo)
self._log.warning(stanza)
return
node = caps.getAttr('node')
if not node:
self._log.warning('node attribute missing')
self._log.warning(stanza)
return
ver = caps.getAttr('ver')
if not ver:
self._log.warning('ver attribute missing')
self._log.warning(stanza)
return
properties.entity_caps = EntityCapsData(
hash=hash_algo,
node=node,
ver=ver)
@property
def caps(self):
if self._caps is None:
return None
return EntityCapsData(hash='sha-1',
node=self._uri,
ver=self._caps_hash)
def set_caps(self, identities, features, uri):
self._uri = uri
self._caps = DiscoInfo(None, identities, features, [])
self._caps_hash = compute_caps_hash(self._caps, compare=False)
self._node = '%s#%s' % (uri, self._caps_hash)
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