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

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# 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-0280: Message Carbons
import logging
import nbxmpp
from gajim.common import app
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log = logging.getLogger('gajim.c.m.carbons')
class Carbons:
def __init__(self, con):
self._con = con
self._account = con.name
self.handlers = []
self.supported = False
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def pass_disco(self, from_, _identities, features, _data, _node):
if nbxmpp.NS_CARBONS not in features:
return
self.supported = True
log.info('Discovered carbons: %s', from_)
if app.config.get_per('accounts', self._account,
'enable_message_carbons'):
iq = nbxmpp.Iq('set')
iq.setTag('enable', namespace=nbxmpp.NS_CARBONS)
log.info('Activate')
self._con.connection.send(iq)
else:
log.warning('Carbons deactivated (user setting)')
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def parse_carbon(con, stanza):
carbon = stanza.getTag(
'received', namespace=nbxmpp.NS_CARBONS, protocol=True)
if carbon is None:
carbon = stanza.getTag(
'sent', namespace=nbxmpp.NS_CARBONS, protocol=True)
if carbon is None:
return stanza, False, False
# Carbon must be from our bare jid
own_jid = con.get_own_jid()
if not stanza.getFrom().bareMatch(own_jid):
log.warning('Ignore message because from is invalid %s',
stanza.getFrom())
raise nbxmpp.NodeProcessed
forwarded = carbon.getTag('forwarded',
namespace=nbxmpp.NS_FORWARD,
protocol=True)
message = forwarded.getTag('message', protocol=True)
type_ = carbon.getName()
to = message.getTo()
frm = message.getFrom()
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log.info('Received type: %s, from: %s', type_, frm)
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if type_ == 'received':
sent = False
if message.getFrom().bareMatch(own_jid):
# Drop 'received' Carbons from ourself, we already
# got the message with the 'sent' Carbon or via the
# message itself
log.info('Drop "received"-Carbon from ourself: %s')
raise nbxmpp.NodeProcessed
if message.getTag('x', namespace=nbxmpp.NS_MUC_USER) is not None:
# A MUC broadcasts messages sent to us to all resources
# there is no need to process carbons for these messages
log.info('Drop MUC-PM "received"-Carbon')
raise nbxmpp.NodeProcessed
elif type_ == 'sent':
if frm is None:
frm = own_jid.getStripped()
message.setTo(frm)
if to is None:
to = own_jid.getStripped()
message.setFrom(to)
sent = True
else:
log.warning('Ignore invalid carbon: %s', stanza)
raise nbxmpp.NodeProcessed
return message, sent, True
def get_instance(*args, **kwargs):
return Carbons(*args, **kwargs), 'Carbons'