Mercurial > libervia-backend
view src/plugins/plugin_xep_0095.py @ 578:28331ecf0a65
misc: README cleaning + added Mutagen to credits
author | Goffi <goffi@goffi.org> |
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date | Wed, 09 Jan 2013 22:31:32 +0100 |
parents | ca13633d3b6b |
children | 952322b1d490 |
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#!/usr/bin/python # -*- coding: utf-8 -*- """ SAT plugin for managing xep-0095 Copyright (C) 2009, 2010, 2011, 2012, 2013 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 logging import debug, info, error from twisted.words.xish import domish from twisted.internet import protocol from twisted.words.protocols.jabber import client, jid from twisted.words.protocols.jabber import error as jab_error import os.path from twisted.internet import reactor import uuid from zope.interface import implements try: from twisted.words.protocols.xmlstream import XMPPHandler except ImportError: from wokkel.subprotocols import XMPPHandler from wokkel import disco, iwokkel IQ_SET = '/iq[@type="set"]' NS_SI = 'http://jabber.org/protocol/si' SI_REQUEST = IQ_SET + '/si[@xmlns="' + NS_SI + '"]' SI_PROFILE_HEADER = "http://jabber.org/protocol/si/profile/" PLUGIN_INFO = { "name": "XEP 0095 Plugin", "import_name": "XEP-0095", "type": "XEP", "protocols": ["XEP-0095"], "main": "XEP_0095", "handler": "yes", "description": _("""Implementation of Stream Initiation""") } class XEP_0095(): def __init__(self, host): info(_("Plugin XEP_0095 initialization")) self.host = host self.si_profiles = {} #key: SI profile, value: callback def getHandler(self, profile): return XEP_0095_handler(self) def registerSIProfile(self, si_profile, callback): """Add a callback for a SI Profile param si_profile: SI profile name (e.g. file-transfer) param callback: method to call when the profile name is asked""" self.si_profiles[si_profile] = callback def streamInit(self, iq_el, profile): """This method is called on stream initiation (XEP-0095 #3.2) @param iq_el: IQ element @param profile: %(doc_profile)s""" info (_("XEP-0095 Stream initiation")) iq_el.handled=True si_el = iq_el.firstChildElement() si_id = si_el.getAttribute('id') si_mime_type = iq_el.getAttribute('mime-type', 'application/octet-stream') si_profile = si_el.getAttribute('profile') si_profile_key = si_profile[len(SI_PROFILE_HEADER):] if si_profile.startswith(SI_PROFILE_HEADER) else si_profile if self.si_profiles.has_key(si_profile_key): #We know this SI profile, we call the callback self.si_profiles[si_profile_key](iq_el['id'], iq_el['from'], si_id, si_mime_type, si_el, profile) else: #We don't know this profile, we send an error self.sendBadProfileError(iq_el['id'], iq_el['from'], profile) def sendRejectedError(self, iq_id, to_jid, reason = 'Offer Declined', profile='@NONE@'): """Helper method to send when the stream is rejected @param iq_id: IQ id @param to_jid: recipient @param reason: human readable reason (string) @param profile: %(doc_profile)s""" self.sendError(iq_id, to_jid, 403, 'cancel', {'text':reason}, profile=profile) def sendBadProfileError(self, iq_id, to_jid, profile): """Helper method to send when we don't know the SI profile @param iq_id: IQ id @param to_jid: recipient @param profile: %(doc_profile)s""" self.sendError(iq_id, to_jid, 400, 'modify', profile=profile) def sendBadRequestError(self, iq_id, to_jid, profile): """Helper method to send when we don't know the SI profile @param iq_id: IQ id @param to_jid: recipient @param profile: %(doc_profile)s""" self.sendError(iq_id, to_jid, 400, 'cancel', profile=profile) def sendFailedError(self, iq_id, to_jid, profile): """Helper method to send when we transfer failed @param iq_id: IQ id @param to_jid: recipient @param profile: %(doc_profile)s""" self.sendError(iq_id, to_jid, 500, 'cancel', {'custom':'failed'}, profile=profile) #as there is no error code for failed transfer, we use 500 (undefined-condition) def sendError(self, iq_id, to_jid, err_code, err_type='cancel', data={}, profile='@NONE@'): """Send IQ error as a result @param iq_id: IQ id @param to_jid: recipient @param err_code: error err_code (see XEP-0095 #4.2) @param err_type: one of cancel, modify @param data: error specific data (dictionary) @param profile: %(doc_profile)s """ _client = self.host.getClient(profile) assert(_client) result = domish.Element((None, 'iq')) result['type'] = 'result' result['id'] = iq_id result['to'] = to_jid error_el = result.addElement('error') error_el['err_code'] = str(err_code) error_el['type'] = err_type if err_code==400 and err_type=='cancel': error_el.addElement(('urn:ietf:params:xml:ns:xmpp-stanzas','bad-request')) error_el.addElement((NS_SI,'no-valid-streams')) elif err_code==400 and err_type=='modify': error_el.addElement(('urn:ietf:params:xml:ns:xmpp-stanzas','bad-request')) error_el.addElement((NS_SI,'bad-profile')) elif err_code==403 and err_type=='cancel': error_el.addElement(('urn:ietf:params:xml:ns:xmpp-stanzas','forbidden')) if data.has_key('text'): error_el.addElement(('urn:ietf:params:xml:ns:xmpp-stanzas','text'), content=data['text']) elif err_code==500 and err_type=='cancel': condition_el = error_el.addElement((NS_SI,'undefined-condition')) if data.has_key('custom') and data['custom']=='failed': condition_el.addContent('Stream failed') _client.xmlstream.send(result) def acceptStream(self, iq_id, to_jid, feature_elt, misc_elts=[], profile='@NONE@'): """Send the accept stream initiation answer @param iq_id: IQ id @param feature_elt: domish element 'feature' containing stream method to use @param misc_elts: list of domish element to add @param profile: %(doc_profile)s""" _client = self.host.getClient(profile) assert(_client) info (_("sending stream initiation accept answer")) result = domish.Element((None, 'iq')) result['type'] = 'result' result['id'] = iq_id result['to'] = to_jid si = result.addElement('si', NS_SI) si.addChild(feature_elt) for elt in misc_elts: si.addChild(elt) _client.xmlstream.send(result) def proposeStream(self, to_jid, si_profile, feature_elt, misc_elts, mime_type='application/octet-stream', profile_key='@NONE@'): """Propose a stream initiation @param to_jid: recipient (JID) @param si_profile: Stream initiation profile (XEP-0095) @param feature_elt: feature domish element, according to XEP-0020 @param misc_elts: list of domish element to add for this profile @param mime_type: stream mime type @param profile: %(doc_profile)s @return: session id, offer""" current_jid, xmlstream = self.host.getJidNStream(profile_key) if not xmlstream: error (_('Asking for an non-existant or not connected profile')) return "" offer = client.IQ(xmlstream,'set') sid = str(uuid.uuid4()) debug (_("Stream Session ID: %s") % offer["id"]) offer["from"] = current_jid.full() offer["to"] = to_jid.full() si=offer.addElement('si',NS_SI) si['id'] = sid si["mime-type"] = mime_type si["profile"] = si_profile for elt in misc_elts: si.addChild(elt) si.addChild(feature_elt) offer.send() return sid, offer class XEP_0095_handler(XMPPHandler): implements(iwokkel.IDisco) def __init__(self, plugin_parent): self.plugin_parent = plugin_parent self.host = plugin_parent.host def connectionInitialized(self): self.xmlstream.addObserver(SI_REQUEST, self.plugin_parent.streamInit, profile = self.parent.profile) def getDiscoInfo(self, requestor, target, nodeIdentifier=''): return [disco.DiscoFeature(NS_SI)] + [disco.DiscoFeature("http://jabber.org/protocol/si/profile/%s" % profile_name) for profile_name in self.plugin_parent.si_profiles] def getDiscoItems(self, requestor, target, nodeIdentifier=''): return []