view src/plugins/plugin_xep_0297.py @ 2138:6e509ee853a8

plugin OTR, core; use of new sendMessage + OTR mini refactoring: - new client.sendMessage method is used instead of sendMessageToStream - client.feedback is used in OTR - OTR now add message processing hints and carbon private element as recommanded by XEP-0364. Explicit Message Encryption is still TODO - OTR use the new sendMessageFinish trigger, this has a number of advantages: * there is little risk that OTR is skipped by other plugins (they have to use client.sendMessage as recommanded) * being at the end of the chain, OTR can check and remove any HTML or other leaking elements * OTR doesn't have to skip other plugins anymore, this means that things like delivery receipts are now working with OTR (but because there is not full stanza encryption, they can leak metadata) * OTR can decide to follow storage hint by letting or deleting "history" key
author Goffi <goffi@goffi.org>
date Sun, 05 Feb 2017 15:00:01 +0100
parents 410e7a940a8b
children 1d3f73e065e1
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#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# SAT plugin for Stanza Forwarding (XEP-0297)
# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
# Copyright (C) 2013-2016 Adrien Cossa (souliane@mailoo.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from sat.core.constants import Const as C
from sat.core.i18n import _, D_
from sat.core.log import getLogger
log = getLogger(__name__)

from wokkel import disco, iwokkel
try:
    from twisted.words.protocols.xmlstream import XMPPHandler
except ImportError:
    from wokkel.subprotocols import XMPPHandler
from zope.interface import implements

from twisted.words.xish import domish

NS_SF = C.NS_FORWARD

PLUGIN_INFO = {
    u"name": u"Stanza Forwarding",
    u"import_name": u"XEP-0297",
    u"type": u"XEP",
    u"protocols": [u"XEP-0297"],
    u"main": "XEP_0297",
    u"handler": u"yes",
    u"description": D_(u"""Implementation of Stanza Forwarding""")
}


class XEP_0297(object):
    # FIXME: check this implementation which doesn't seems to be used

    def __init__(self, host):
        log.info(_("Stanza Forwarding plugin initialization"))
        self.host = host

    def getHandler(self, profile):
        return XEP_0297_handler(self, profile)

    @classmethod
    def updateUri(cls, element, uri):
        """Update recursively the element URI.

        @param element (domish.Element): element to update
        @param uri (unicode): new URI
        """
        # XXX: we need this because changing the URI of an existing element
        # containing children doesn't update the children's blank URI.
        element.uri = uri
        element.defaultUri = uri
        for child in element.children:
            if isinstance(child, domish.Element) and not child.uri:
                XEP_0297.updateUri(child, uri)

    def forward(self, stanza, to_jid, stamp, body='', profile_key=C.PROF_KEY_NONE):
        """Forward a message to the given JID.

        @param stanza (domish.Element): original stanza to be forwarded.
        @param to_jid (JID): recipient JID.
        @param stamp (datetime): offset-aware timestamp of the original reception.
        @param body (unicode): optional description.
        @param profile_key (unicode): %(doc_profile_key)s
        @return: a Deferred when the message has been sent
        """
        # FIXME: this method is not used and doesn't use mess_data which should be used for client.sendMessage
        #        should it be deprecated? A method constructing the element without sending it seems more natural
        log.warning(u"THIS METHOD IS DEPRECATED") # FIXME: we use this warning until we check the method
        msg = domish.Element((None, 'message'))
        msg['to'] = to_jid.full()
        msg['type'] = stanza['type']

        body_elt = domish.Element((None, 'body'))
        if body:
            body_elt.addContent(body)

        forwarded_elt = domish.Element((NS_SF, 'forwarded'))
        delay_elt = self.host.plugins['XEP-0203'].delay(stamp)
        forwarded_elt.addChild(delay_elt)
        if not stanza.uri:  # None or ''
            XEP_0297.updateUri(stanza, 'jabber:client')
        forwarded_elt.addChild(stanza)

        msg.addChild(body_elt)
        msg.addChild(forwarded_elt)

        client = self.host.getClient(profile_key)
        return client.sendMessage({u'xml': msg})


class XEP_0297_handler(XMPPHandler):
    implements(iwokkel.IDisco)

    def __init__(self, plugin_parent, profile):
        self.plugin_parent = plugin_parent
        self.host = plugin_parent.host
        self.profile = profile

    def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
        return [disco.DiscoFeature(NS_SF)]

    def getDiscoItems(self, requestor, target, nodeIdentifier=''):
        return []