Mercurial > libervia-backend
view src/plugins/plugin_xep_0234.py @ 2195:d65275ac39b3
plugin XEP-0060: renamed psGet bridge method to psItemGet
author | Goffi <goffi@goffi.org> |
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date | Mon, 13 Mar 2017 23:17:13 +0100 |
parents | 33c8c4973743 |
children | 8b37a62336c3 |
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#!/usr/bin/env python2 # -*- coding: utf-8 -*- # SAT plugin for Jingle File Transfer (XEP-0234) # 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.constants import Const as C from sat.core.log import getLogger log = getLogger(__name__) from sat.core import exceptions from wokkel import disco, iwokkel from zope.interface import implements from sat.tools import utils import os.path from twisted.words.xish import domish from twisted.words.protocols.jabber import jid from twisted.python import failure from twisted.words.protocols.jabber.xmlstream import XMPPHandler from twisted.internet import defer from twisted.internet import reactor from twisted.internet import error as internet_error NS_JINGLE_FT = 'urn:xmpp:jingle:apps:file-transfer:4' PLUGIN_INFO = { C.PI_NAME: "Jingle File Transfer", C.PI_IMPORT_NAME: "XEP-0234", C.PI_TYPE: "XEP", C.PI_PROTOCOLS: ["XEP-0234"], C.PI_DEPENDENCIES: ["XEP-0166", "XEP-0300", "FILE"], C.PI_MAIN: "XEP_0234", C.PI_HANDLER: "yes", C.PI_DESCRIPTION: _("""Implementation of Jingle File Transfer""") } class XEP_0234(object): # TODO: assure everything is closed when file is sent or session terminate is received # TODO: call self._f.unregister when unloading order will be managing (i.e. when dependencies will be unloaded at the end) def __init__(self, host): log.info(_("plugin Jingle File Transfer initialization")) self.host = host self._j = host.plugins["XEP-0166"] # shortcut to access jingle self._j.registerApplication(NS_JINGLE_FT, self) self._f = host.plugins["FILE"] self._f.register(NS_JINGLE_FT, self.fileJingleSend, priority = 10000, method_name=u"Jingle") self._hash = self.host.plugins["XEP-0300"] host.bridge.addMethod("fileJingleSend", ".plugin", in_sign='sssss', out_sign='', method=self._fileJingleSend) def getHandler(self, client): return XEP_0234_handler() def _getProgressId(self, session, content_name): """Return a unique progress ID @param session(dict): jingle session @param content_name(unicode): name of the content @return (unicode): unique progress id """ return u'{}_{}'.format(session['id'], content_name) def _fileJingleSend(self, peer_jid, filepath, name="", file_desc="", profile=C.PROF_KEY_NONE): return self.fileJingleSend(jid.JID(peer_jid), filepath, name or None, file_desc or None, profile) def fileJingleSend(self, peer_jid, filepath, name, file_desc=None, profile=C.PROF_KEY_NONE): """Send a file using jingle file transfer @param peer_jid(jid.JID): destinee jid @param filepath(str): absolute path of the file @param name(unicode, None): name of the file @param file_desc(unicode, None): description of the file @param profile: %(doc_profile)s @return (D(unicode)): progress id """ progress_id_d = defer.Deferred() self._j.initiate(peer_jid, [{'app_ns': NS_JINGLE_FT, 'senders': self._j.ROLE_INITIATOR, 'app_kwargs': {'filepath': filepath, 'name': name, 'file_desc': file_desc, 'progress_id_d': progress_id_d}, }], profile=profile) return progress_id_d # jingle callbacks def jingleSessionInit(self, session, content_name, filepath, name, file_desc, progress_id_d, profile=C.PROF_KEY_NONE): progress_id_d.callback(self._getProgressId(session, content_name)) content_data = session['contents'][content_name] application_data = content_data['application_data'] assert 'file_path' not in application_data application_data['file_path'] = filepath file_data = application_data['file_data'] = {} file_data['date'] = utils.xmpp_date() file_data['desc'] = file_desc or '' file_data['media-type'] = "application/octet-stream" # TODO file_data['name'] = os.path.basename(filepath) if name is None else name file_data['size'] = os.path.getsize(filepath) desc_elt = domish.Element((NS_JINGLE_FT, 'description')) file_elt = desc_elt.addElement("file") for name in ('date', 'desc', 'media-type', 'name', 'size'): file_elt.addElement(name, content=unicode(file_data[name])) file_elt.addElement("range") # TODO file_elt.addChild(self._hash.buildHashElt()) return desc_elt def jingleRequestConfirmation(self, action, session, content_name, desc_elt, profile): """This method request confirmation for a jingle session""" content_data = session['contents'][content_name] if content_data['senders'] not in (self._j.ROLE_INITIATOR, self._j.ROLE_RESPONDER): log.warning(u"Bad sender, assuming initiator") content_data['senders'] = self._j.ROLE_INITIATOR # first we grab file informations try: file_elt = desc_elt.elements(NS_JINGLE_FT, 'file').next() except StopIteration: raise failure.Failure(exceptions.DataError) file_data = {'progress_id': self._getProgressId(session, content_name)} for name in ('date', 'desc', 'media-type', 'name', 'range', 'size'): try: file_data[name] = unicode(file_elt.elements(NS_JINGLE_FT, name).next()) except StopIteration: file_data[name] = '' try: hash_algo, file_data['hash_given'] = self._hash.parseHashElt(file_elt) except exceptions.NotFound: raise failure.Failure(exceptions.DataError) if hash_algo is not None: file_data['hash_algo'] = hash_algo file_data['hash_hasher'] = hasher = self._hash.getHasher(hash_algo) file_data['data_cb'] = lambda data: hasher.update(data) try: file_data['size'] = int(file_data['size']) except ValueError: raise failure.Failure(exceptions.DataError) name = file_data['name'] if '/' in name or '\\' in name: log.warning(u"File name contain path characters, we replace them: {}".format(name)) file_data['name'] = name.replace('/', '_').replace('\\', '_') content_data['application_data']['file_data'] = file_data # now we actualy request permission to user def gotConfirmation(confirmed): if confirmed: finished_d = content_data['finished_d'] = defer.Deferred() args = [session, content_name, content_data, profile] finished_d.addCallbacks(self._finishedCb, self._finishedEb, args, None, args) return confirmed d = self._f.getDestDir(session['peer_jid'], content_data, file_data, profile) d.addCallback(gotConfirmation) return d def jingleHandler(self, action, session, content_name, desc_elt, profile): content_data = session['contents'][content_name] application_data = content_data['application_data'] if action in (self._j.A_ACCEPTED_ACK,): pass elif action == self._j.A_SESSION_INITIATE: file_elt = desc_elt.elements(NS_JINGLE_FT, 'file').next() try: file_elt.elements(NS_JINGLE_FT, 'range').next() except StopIteration: # initiator doesn't manage <range>, but we do so we advertise it log.debug("adding <range> element") file_elt.addElement('range') elif action == self._j.A_SESSION_ACCEPT: assert not 'file_obj' in content_data file_data = application_data['file_data'] file_path = application_data['file_path'] size = file_data['size'] # XXX: hash security is not critical here, so we just take the higher mandatory one hasher = file_data['hash_hasher'] = self._hash.getHasher('sha-256') content_data['file_obj'] = self._f.File(self.host, file_path, uid=self._getProgressId(session, content_name), size=size, data_cb=lambda data: hasher.update(data), profile=profile ) finished_d = content_data['finished_d'] = defer.Deferred() args = [session, content_name, content_data, profile] finished_d.addCallbacks(self._finishedCb, self._finishedEb, args, None, args) else: log.warning(u"FIXME: unmanaged action {}".format(action)) return desc_elt def jingleSessionInfo(self, action, session, content_name, jingle_elt, profile): """Called on session-info action manage checksum, and ignore <received/> element """ # TODO: manage <received/> element content_data = session['contents'][content_name] elts = [elt for elt in jingle_elt.elements() if elt.uri == NS_JINGLE_FT] if not elts: return for elt in elts: if elt.name == 'received': pass elif elt.name == 'checksum': # we have received the file hash, we need to parse it if content_data['senders'] == session['role']: log.warning(u"unexpected checksum received while we are the file sender") raise exceptions.DataError info_content_name = elt['name'] if info_content_name != content_name: # it was for an other content... return file_data = content_data['application_data']['file_data'] try: file_elt = elt.elements((NS_JINGLE_FT, 'file')).next() except StopIteration: raise exceptions.DataError algo, file_data['hash_given'] = self._hash.parseHashElt(file_elt) if algo != file_data.get('hash_algo'): log.warning(u"Hash algorithm used in given hash ({peer_algo}) doesn't correspond to the one we have used ({our_algo})" .format(peer_algo=algo, our_algo=file_data.get('hash_algo'))) else: self._receiverTryTerminate(session, content_name, content_data, profile=profile) else: raise NotImplementedError def _sendCheckSum(self, session, content_name, content_data, profile): """Send the session-info with the hash checksum""" file_data = content_data['application_data']['file_data'] hasher = file_data['hash_hasher'] hash_ = hasher.hexdigest() log.debug(u"Calculated hash: {}".format(hash_)) iq_elt, jingle_elt = self._j.buildSessionInfo(session, profile) checksum_elt = jingle_elt.addElement((NS_JINGLE_FT, 'checksum')) checksum_elt['creator'] = content_data['creator'] checksum_elt['name'] = content_name file_elt = checksum_elt.addElement('file') file_elt.addChild(self._hash.buildHashElt(hash_)) iq_elt.send() def _receiverTryTerminate(self, session, content_name, content_data, last_try=False, profile=C.PROF_KEY_NONE): """Try to terminate the session This method must only be used by the receiver. It check if transfer is finished, and hash available, if everything is OK, it check hash and terminate the session @param last_try(bool): if True this mean than session must be terminated even given hash is not available @return (bool): True if session was terminated """ if not content_data.get('transfer_finished', False): return False file_data = content_data['application_data']['file_data'] hash_given = file_data.get('hash_given') if hash_given is None: if last_try: log.warning(u"sender didn't sent hash checksum, we can't check the file") self._j.delayedContentTerminate(session, content_name, profile=profile) content_data['file_obj'].close() return True return False hasher = file_data['hash_hasher'] hash_ = hasher.hexdigest() if hash_ == hash_given: log.info(u"Hash checked, file was successfully transfered: {}".format(hash_)) progress_metadata = {'hash': hash_, 'hash_algo': file_data['hash_algo'], 'hash_verified': C.BOOL_TRUE } error = None else: log.warning(u"Hash mismatch, the file was not transfered correctly") progress_metadata=None error = u"Hash mismatch: given={algo}:{given}, calculated={algo}:{our}".format( algo = file_data['hash_algo'], given = hash_given, our = hash_) self._j.delayedContentTerminate(session, content_name, profile=profile) content_data['file_obj'].close(progress_metadata, error) # we may have the last_try timer still active, so we try to cancel it try: content_data['last_try_timer'].cancel() except (KeyError, internet_error.AlreadyCalled): pass return True def _finishedCb(self, dummy, session, content_name, content_data, profile): log.info(u"File transfer terminated") if content_data['senders'] != session['role']: # we terminate the session only if we are the receiver, # as recommanded in XEP-0234 §2 (after example 6) content_data['transfer_finished'] = True if not self._receiverTryTerminate(session, content_name, content_data, profile=profile): # we have not received the hash yet, we wait 5 more seconds content_data['last_try_timer'] = reactor.callLater( 5, self._receiverTryTerminate, session, content_name, content_data, last_try=True, profile=profile) else: # we are the sender, we send the checksum self._sendCheckSum(session, content_name, content_data, profile) content_data['file_obj'].close() def _finishedEb(self, failure, session, content_name, content_data, profile): log.warning(u"Error while streaming file: {}".format(failure)) content_data['file_obj'].close() self._j.contentTerminate(session, content_name, reason=self._j.REASON_FAILED_TRANSPORT, profile=profile) class XEP_0234_handler(XMPPHandler): implements(iwokkel.IDisco) def getDiscoInfo(self, requestor, target, nodeIdentifier=''): return [disco.DiscoFeature(NS_JINGLE_FT)] def getDiscoItems(self, requestor, target, nodeIdentifier=''): return []