view src/plugins/plugin_xep_0049.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 2daf7b4c6756
children 33c8c4973743
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#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# SAT plugin for managing xep-0049
# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.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.i18n import _
from sat.core.log import getLogger
log = getLogger(__name__)
from wokkel import compat
from twisted.words.xish import domish



PLUGIN_INFO = {
    "name": "XEP-0049 Plugin",
    "import_name": "XEP-0049",
    "type": "XEP",
    "protocols": ["XEP-0049"],
    "dependencies": [],
    "main": "XEP_0049",
    "handler": "no",
    "description": _("""Implementation of private XML storage""")
}


class XEP_0049(object):
    NS_PRIVATE = 'jabber:iq:private'

    def __init__(self, host):
        log.info(_("Plugin XEP-0049 initialization"))
        self.host = host

    def privateXMLStore(self, element, profile_key):
        """Store private data
        @param element: domish.Element to store (must have a namespace)
        @param profile_key: %(doc_profile_key)s

        """
        assert isinstance(element, domish.Element)
        client = self.host.getClient(profile_key)
        # XXX: feature announcement in disco#info is not mandatory in XEP-0049, so we have to try to use private XML, and react according to the answer
        iq_elt = compat.IQ(client.xmlstream)
        query_elt = iq_elt.addElement('query', XEP_0049.NS_PRIVATE)
        query_elt.addChild(element)
        return iq_elt.send()

    def privateXMLGet(self, node_name, namespace, profile_key):
        """Store private data
        @param node_name: name of the node to get
        @param namespace: namespace of the node to get
        @param profile_key: %(doc_profile_key)s
        @return (domish.Element): a deferred which fire the stored data

        """
        client = self.host.getClient(profile_key)
        # XXX: see privateXMLStore note about feature checking
        iq_elt = compat.IQ(client.xmlstream, 'get')
        query_elt = iq_elt.addElement('query', XEP_0049.NS_PRIVATE)
        query_elt.addElement(node_name, namespace)
        def getCb(answer_iq_elt):
            answer_query_elt = answer_iq_elt.elements(XEP_0049.NS_PRIVATE, 'query').next()
            return answer_query_elt.firstChildElement()
        d = iq_elt.send()
        d.addCallback(getCb)
        return d