435 lines
15 KiB
Python
435 lines
15 KiB
Python
# Copyright (C) 2006-2014 Yann Leboulanger <asterix AT lagaule.org>
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# Copyright (C) 2006-2007 Tomasz Melcer <liori AT exroot.org>
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# Copyright (C) 2007 Jean-Marie Traissard <jim AT lapin.org>
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# Copyright (C) 2008 Brendan Taylor <whateley AT gmail.com>
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# Stephan Erb <steve-e AT h3c.de>
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# Copyright (C) 2018 Philipp Hörist <philipp AT hoerist.com>
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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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import nbxmpp
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from nbxmpp.namespaces import Namespace
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from nbxmpp.structs import StanzaHandler
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from nbxmpp.modules import dataforms
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from nbxmpp.util import generate_id
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from gajim.common import app
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from gajim.common import helpers
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from gajim.common.i18n import _
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from gajim.common.nec import NetworkIncomingEvent
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from gajim.common.modules.base import BaseModule
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class AdHocCommand:
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commandnode = 'command'
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commandname = 'The Command'
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commandfeatures = (Namespace.DATA,)
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@staticmethod
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def is_visible_for(_samejid):
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"""
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This returns True if that command should be visible and invocable for
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others
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samejid - True when command is invoked by an entity with the same bare
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jid.
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"""
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return True
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def __init__(self, conn, jid, sessionid):
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self.connection = conn
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self.jid = jid
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self.sessionid = sessionid
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def build_response(self, request, status='executing', defaultaction=None,
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actions=None):
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assert status in ('executing', 'completed', 'canceled')
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response = request.buildReply('result')
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cmd = response.getTag('command', namespace=Namespace.COMMANDS)
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cmd.setAttr('sessionid', self.sessionid)
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cmd.setAttr('node', self.commandnode)
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cmd.setAttr('status', status)
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if defaultaction is not None or actions is not None:
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if defaultaction is not None:
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assert defaultaction in ('cancel', 'execute', 'prev', 'next',
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'complete')
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attrs = {'action': defaultaction}
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else:
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attrs = {}
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cmd.addChild('actions', attrs, actions)
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return response, cmd
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def bad_request(self, stanza):
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self.connection.connection.send(
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nbxmpp.Error(stanza, Namespace.STANZAS + ' bad-request'))
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def cancel(self, request):
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response = self.build_response(request, status='canceled')[0]
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self.connection.connection.send(response)
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return False # finish the session
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class ChangeStatusCommand(AdHocCommand):
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commandnode = 'change-status'
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commandname = _('Change status information')
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def __init__(self, conn, jid, sessionid):
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AdHocCommand.__init__(self, conn, jid, sessionid)
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self._callback = self.first_step
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@staticmethod
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def is_visible_for(samejid):
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"""
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Change status is visible only if the entity has the same bare jid
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"""
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return samejid
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def execute(self, request):
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return self._callback(request)
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def first_step(self, request):
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# first query...
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response, cmd = self.build_response(request,
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defaultaction='execute',
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actions=['execute'])
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cmd.addChild(
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node=dataforms.SimpleDataForm(
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title=_('Change status'),
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instructions=_('Set the presence type and description'),
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fields=[
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dataforms.create_field(
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'list-single',
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var='presence-type',
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label='Type of presence:',
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options=[
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('chat', _('Free for chat')),
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('online', _('Online')),
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('away', _('Away')),
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('xa', _('Extended away')),
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('dnd', _('Do not disturb')),
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('offline', _('Offline - disconnect'))],
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value='online',
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required=True),
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dataforms.create_field(
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'text-multi',
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var='presence-desc',
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label=_('Presence description:'))
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]
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)
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)
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self.connection.connection.send(response)
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# for next invocation
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self._callback = self.second_step
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return True # keep the session
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def second_step(self, request):
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# check if the data is correct
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try:
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form = dataforms.SimpleDataForm(
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extend=request.getTag('command').getTag('x'))
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except Exception:
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self.bad_request(request)
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return False
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try:
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presencetype = form['presence-type'].value
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if presencetype not in ('chat', 'online', 'away',
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'xa', 'dnd', 'offline'):
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self.bad_request(request)
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return False
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except Exception:
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# KeyError if there's no presence-type field in form or
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# AttributeError if that field is of wrong type
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self.bad_request(request)
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return False
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try:
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presencedesc = form['presence-desc'].value
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except Exception: # same exceptions as in last comment
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presencedesc = ''
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response, cmd = self.build_response(request, status='completed')
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cmd.addChild('note', {}, _('The status has been changed.'))
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# if going offline, we need to push response so it won't go into
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# queue and disappear
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self.connection.connection.send(response,
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now=presencetype == 'offline')
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# send new status
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app.interface.roster.send_status(
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self.connection.name, presencetype, presencedesc)
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return False # finish the session
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class AdHocCommands(BaseModule):
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_nbxmpp_extends = 'AdHoc'
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_nbxmpp_methods = [
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'request_command_list',
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'execute_command',
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]
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def __init__(self, con):
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BaseModule.__init__(self, con)
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self.handlers = [
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StanzaHandler(name='iq',
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callback=self._execute_command_received,
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typ='set',
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ns=Namespace.COMMANDS),
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]
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# a list of all commands exposed: node -> command class
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self._commands = {}
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if app.settings.get('remote_commands'):
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for cmdobj in (ChangeStatusCommand,):
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self._commands[cmdobj.commandnode] = cmdobj
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# a list of sessions; keys are tuples (jid, sessionid, node)
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self._sessions = {}
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def get_own_bare_jid(self):
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return self._con.get_own_jid().bare
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def is_same_jid(self, jid):
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"""
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Test if the bare jid given is the same as our bare jid
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"""
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return nbxmpp.JID.from_string(jid).bare == self.get_own_bare_jid()
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def command_list_query(self, stanza):
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iq = stanza.buildReply('result')
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jid = helpers.get_full_jid_from_iq(stanza)
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query = iq.getTag('query')
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# buildReply don't copy the node attribute. Re-add it
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query.setAttr('node', Namespace.COMMANDS)
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for node, cmd in self._commands.items():
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if cmd.is_visible_for(self.is_same_jid(jid)):
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query.addChild('item', {
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# TODO: find the jid
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'jid': str(self._con.get_own_jid()),
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'node': node,
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'name': cmd.commandname})
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self._con.connection.send(iq)
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def command_info_query(self, stanza):
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"""
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Send disco#info result for query for command (XEP-0050, example 6.).
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Return True if the result was sent, False if not
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"""
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try:
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jid = helpers.get_full_jid_from_iq(stanza)
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except helpers.InvalidFormat:
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self._log.warning('Invalid JID: %s, ignoring it', stanza.getFrom())
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return False
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node = stanza.getTagAttr('query', 'node')
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if node not in self._commands:
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return False
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cmd = self._commands[node]
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if cmd.is_visible_for(self.is_same_jid(jid)):
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iq = stanza.buildReply('result')
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query = iq.getTag('query')
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query.addChild('identity',
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attrs={'type': 'command-node',
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'category': 'automation',
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'name': cmd.commandname})
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query.addChild('feature', attrs={'var': Namespace.COMMANDS})
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for feature in cmd.commandfeatures:
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query.addChild('feature', attrs={'var': feature})
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self._con.connection.send(iq)
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return True
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return False
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def command_items_query(self, stanza):
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"""
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Send disco#items result for query for command.
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Return True if the result was sent, False if not.
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"""
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jid = helpers.get_full_jid_from_iq(stanza)
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node = stanza.getTagAttr('query', 'node')
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if node not in self._commands:
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return False
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cmd = self._commands[node]
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if cmd.is_visible_for(self.is_same_jid(jid)):
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iq = stanza.buildReply('result')
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self._con.connection.send(iq)
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return True
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return False
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def _execute_command_received(self, _con, stanza, _properties):
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jid = helpers.get_full_jid_from_iq(stanza)
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cmd = stanza.getTag('command')
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if cmd is None:
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self._log.error('Malformed stanza (no command node) %s', stanza)
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raise nbxmpp.NodeProcessed
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node = cmd.getAttr('node')
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if node is None:
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self._log.error('Malformed stanza (no node attr) %s', stanza)
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raise nbxmpp.NodeProcessed
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sessionid = cmd.getAttr('sessionid')
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if sessionid is None:
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# we start a new command session
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# only if we are visible for the jid and command exist
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if node not in self._commands.keys():
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self._con.connection.send(
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nbxmpp.Error(
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stanza, Namespace.STANZAS + ' item-not-found'))
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self._log.warning('Comand %s does not exist: %s', node, jid)
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raise nbxmpp.NodeProcessed
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newcmd = self._commands[node]
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if not newcmd.is_visible_for(self.is_same_jid(jid)):
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self._log.warning('Command not visible for jid: %s', jid)
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raise nbxmpp.NodeProcessed
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# generate new sessionid
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sessionid = generate_id()
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# create new instance and run it
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obj = newcmd(conn=self, jid=jid, sessionid=sessionid)
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rc = obj.execute(stanza)
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if rc:
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self._sessions[(jid, sessionid, node)] = obj
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self._log.info('Comand %s executed: %s', node, jid)
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raise nbxmpp.NodeProcessed
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# the command is already running, check for it
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magictuple = (jid, sessionid, node)
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if magictuple not in self._sessions:
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# we don't have this session... ha!
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self._log.warning('Invalid session %s', magictuple)
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raise nbxmpp.NodeProcessed
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action = cmd.getAttr('action')
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obj = self._sessions[magictuple]
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try:
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if action == 'cancel':
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rc = obj.cancel(stanza)
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elif action == 'prev':
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rc = obj.prev(stanza)
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elif action == 'next':
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rc = obj.next(stanza)
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elif action == 'execute' or action is None:
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rc = obj.execute(stanza)
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elif action == 'complete':
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rc = obj.complete(stanza)
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else:
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# action is wrong. stop the session, send error
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raise AttributeError
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except AttributeError:
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# the command probably doesn't handle invoked action...
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# stop the session, return error
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del self._sessions[magictuple]
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self._log.warning('Wrong action %s %s', node, jid)
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raise nbxmpp.NodeProcessed
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# delete the session if rc is False
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if not rc:
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del self._sessions[magictuple]
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raise nbxmpp.NodeProcessed
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def send_command(self, jid, node, session_id,
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form, action='execute'):
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"""
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Send the command with data form. Wait for reply
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"""
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self._log.info('Send Command: %s %s %s %s',
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jid, node, session_id, action)
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stanza = nbxmpp.Iq(typ='set', to=jid)
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cmdnode = stanza.addChild('command',
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namespace=Namespace.COMMANDS,
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attrs={'node': node,
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'action': action})
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if session_id:
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cmdnode.setAttr('sessionid', session_id)
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if form:
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cmdnode.addChild(node=form.get_purged())
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self._con.connection.SendAndCallForResponse(
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stanza, self._action_response_received)
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def _action_response_received(self, _nbxmpp_client, stanza):
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if not nbxmpp.isResultNode(stanza):
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self._log.info('Error: %s', stanza.getError())
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app.nec.push_incoming_event(
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AdHocCommandError(None, conn=self._con,
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error=stanza.getError()))
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return
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self._log.info('Received action response')
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command = stanza.getTag('command')
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app.nec.push_incoming_event(
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AdHocCommandActionResponse(
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None, conn=self._con, command=command))
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def send_cancel(self, jid, node, session_id):
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"""
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Send the command with action='cancel'
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"""
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self._log.info('Cancel: %s %s %s', jid, node, session_id)
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stanza = nbxmpp.Iq(typ='set', to=jid)
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stanza.addChild('command', namespace=Namespace.COMMANDS,
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attrs={
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'node': node,
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'sessionid': session_id,
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'action': 'cancel'
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})
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self._con.connection.SendAndCallForResponse(
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stanza, self._cancel_result_received)
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def _cancel_result_received(self, _nbxmpp_client, stanza):
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if not nbxmpp.isResultNode(stanza):
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self._log.warning('Error: %s', stanza.getError())
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else:
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self._log.info('Cancel successful')
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class AdHocCommandError(NetworkIncomingEvent):
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name = 'adhoc-command-error'
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class AdHocCommandActionResponse(NetworkIncomingEvent):
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name = 'adhoc-command-action-response'
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def get_instance(*args, **kwargs):
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return AdHocCommands(*args, **kwargs), 'AdHocCommands'
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