annotate sat/plugins/plugin_xep_0047.py @ 3770:f31113777881

tests (unit/ap-gateway): tests for following/followers <=> PPS: AP following/followers collections to XMPP Public Pubsub Subscriptions conversion is checked in both directions. rel 365
author Goffi <goffi@goffi.org>
date Fri, 13 May 2022 19:29:17 +0200
parents be6d91572633
children 524856bd7b19
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT plugin for managing gateways (xep-0047)
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from sat.core.i18n import _
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21 from sat.core.log import getLogger
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22
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23 log = getLogger(__name__)
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24 from sat.core.constants import Const as C
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25 from sat.core import exceptions
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26 from twisted.words.protocols.jabber import jid
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27 from twisted.words.protocols.jabber import xmlstream
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28 from twisted.words.protocols.jabber import error
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29 from twisted.internet import reactor
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30 from twisted.internet import defer
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31 from twisted.python import failure
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33 from wokkel import disco, iwokkel
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34
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35 from zope.interface import implementer
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37 import base64
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39 try:
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40 from twisted.words.protocols.xmlstream import XMPPHandler
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41 except ImportError:
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42 from wokkel.subprotocols import XMPPHandler
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43
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44 MESSAGE = "/message"
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45 IQ_SET = '/iq[@type="set"]'
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46 NS_IBB = "http://jabber.org/protocol/ibb"
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47 IBB_OPEN = IQ_SET + '/open[@xmlns="' + NS_IBB + '"]'
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48 IBB_CLOSE = IQ_SET + '/close[@xmlns="' + NS_IBB + '" and @sid="{}"]'
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49 IBB_IQ_DATA = IQ_SET + '/data[@xmlns="' + NS_IBB + '" and @sid="{}"]'
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50 IBB_MESSAGE_DATA = MESSAGE + '/data[@xmlns="' + NS_IBB + '" and @sid="{}"]'
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51 TIMEOUT = 120 # timeout for workflow
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52 DEFER_KEY = "finished" # key of the deferred used to track session end
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53
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54 PLUGIN_INFO = {
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55 C.PI_NAME: "In-Band Bytestream Plugin",
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56 C.PI_IMPORT_NAME: "XEP-0047",
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57 C.PI_TYPE: "XEP",
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58 C.PI_MODES: C.PLUG_MODE_BOTH,
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59 C.PI_PROTOCOLS: ["XEP-0047"],
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60 C.PI_MAIN: "XEP_0047",
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61 C.PI_HANDLER: "yes",
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62 C.PI_DESCRIPTION: _("""Implementation of In-Band Bytestreams"""),
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63 }
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65
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66 class XEP_0047(object):
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67 NAMESPACE = NS_IBB
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68 BLOCK_SIZE = 4096
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70 def __init__(self, host):
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71 log.info(_("In-Band Bytestreams plugin initialization"))
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72 self.host = host
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73
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74 def getHandler(self, client):
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75 return XEP_0047_handler(self)
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76
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77 def profileConnected(self, client):
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78 client.xep_0047_current_stream = {} # key: stream_id, value: data(dict)
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79
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80 def _timeOut(self, sid, client):
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81 """Delete current_stream id, called after timeout
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82
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83 @param sid(unicode): session id of client.xep_0047_current_stream
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84 @param client: %(doc_client)s
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85 """
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86 log.info(
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87 "In-Band Bytestream: TimeOut reached for id {sid} [{profile}]".format(
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88 sid=sid, profile=client.profile
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89 )
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90 )
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91 self._killSession(sid, client, "TIMEOUT")
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92
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93 def _killSession(self, sid, client, failure_reason=None):
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94 """Delete a current_stream id, clean up associated observers
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95
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96 @param sid(unicode): session id
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97 @param client: %(doc_client)s
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98 @param failure_reason(None, unicode): if None the session is successful
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99 else, will be used to call failure_cb
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100 """
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101 try:
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102 session = client.xep_0047_current_stream[sid]
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103 except KeyError:
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104 log.warning("kill id called on a non existant id")
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105 return
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106
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107 try:
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108 observer_cb = session["observer_cb"]
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109 except KeyError:
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110 pass
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111 else:
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112 client.xmlstream.removeObserver(session["event_data"], observer_cb)
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113
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114 if session["timer"].active():
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115 session["timer"].cancel()
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116
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117 del client.xep_0047_current_stream[sid]
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118
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119 success = failure_reason is None
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120 stream_d = session[DEFER_KEY]
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121
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122 if success:
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123 stream_d.callback(None)
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124 else:
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125 stream_d.errback(failure.Failure(exceptions.DataError(failure_reason)))
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126
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127 def createSession(self, *args, **kwargs):
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128 """like [_createSession] but return the session deferred instead of the whole session
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129
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130 session deferred is fired when transfer is finished
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131 """
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132 return self._createSession(*args, **kwargs)[DEFER_KEY]
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133
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134 def _createSession(self, client, stream_object, local_jid, to_jid, sid):
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135 """Called when a bytestream is imminent
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136
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137 @param stream_object(IConsumer): stream object where data will be written
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138 @param local_jid(jid.JID): same as [startStream]
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139 @param to_jid(jid.JId): jid of the other peer
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140 @param sid(unicode): session id
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141 @return (dict): session data
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142 """
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143 if sid in client.xep_0047_current_stream:
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144 raise exceptions.ConflictError("A session with this id already exists !")
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145 session_data = client.xep_0047_current_stream[sid] = {
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146 "id": sid,
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147 DEFER_KEY: defer.Deferred(),
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148 "local_jid": local_jid,
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149 "to": to_jid,
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150 "stream_object": stream_object,
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151 "seq": -1,
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152 "timer": reactor.callLater(TIMEOUT, self._timeOut, sid, client),
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153 }
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154
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155 return session_data
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156
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157 def _onIBBOpen(self, iq_elt, client):
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158 """"Called when an IBB <open> element is received
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159
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160 @param iq_elt(domish.Element): the whole <iq> stanza
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161 """
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162 log.debug(_("IBB stream opening"))
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163 iq_elt.handled = True
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164 open_elt = next(iq_elt.elements(NS_IBB, "open"))
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165 block_size = open_elt.getAttribute("block-size")
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166 sid = open_elt.getAttribute("sid")
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167 stanza = open_elt.getAttribute("stanza", "iq")
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168 if not sid or not block_size or int(block_size) > 65535:
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169 return self._sendError("not-acceptable", sid or None, iq_elt, client)
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170 if not sid in client.xep_0047_current_stream:
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171 log.warning(_("Ignoring unexpected IBB transfer: %s" % sid))
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172 return self._sendError("not-acceptable", sid or None, iq_elt, client)
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173 session_data = client.xep_0047_current_stream[sid]
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174 if session_data["to"] != jid.JID(iq_elt["from"]):
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175 log.warning(
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176 _("sended jid inconsistency (man in the middle attack attempt ?)")
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177 )
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178 return self._sendError("not-acceptable", sid, iq_elt, client)
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179
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180 # at this stage, the session looks ok and will be accepted
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181
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182 # we reset the timeout:
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183 session_data["timer"].reset(TIMEOUT)
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184
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185 # we save the xmlstream, events and observer data to allow observer removal
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186 session_data["event_data"] = event_data = (
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187 IBB_MESSAGE_DATA if stanza == "message" else IBB_IQ_DATA
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188 ).format(sid)
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189 session_data["observer_cb"] = observer_cb = self._onIBBData
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190 event_close = IBB_CLOSE.format(sid)
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191 # we now set the stream observer to look after data packet
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192 # FIXME: if we never get the events, the observers stay.
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193 # would be better to have generic observer and check id once triggered
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194 client.xmlstream.addObserver(event_data, observer_cb, client=client)
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195 client.xmlstream.addOnetimeObserver(event_close, self._onIBBClose, client=client)
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196 # finally, we send the accept stanza
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197 iq_result_elt = xmlstream.toResponse(iq_elt, "result")
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198 client.send(iq_result_elt)
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199
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200 def _onIBBClose(self, iq_elt, client):
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201 """"Called when an IBB <close> element is received
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202
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203 @param iq_elt(domish.Element): the whole <iq> stanza
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204 """
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205 iq_elt.handled = True
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206 log.debug(_("IBB stream closing"))
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207 close_elt = next(iq_elt.elements(NS_IBB, "close"))
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208 # XXX: this observer is only triggered on valid sid, so we don't need to check it
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209 sid = close_elt["sid"]
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210
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211 iq_result_elt = xmlstream.toResponse(iq_elt, "result")
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diff changeset
212 client.send(iq_result_elt)
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213 self._killSession(sid, client)
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214
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215 def _onIBBData(self, element, client):
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216 """Observer called on <iq> or <message> stanzas with data element
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217
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218 Manage the data elelement (check validity and write to the stream_object)
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219 @param element(domish.Element): <iq> or <message> stanza
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220 """
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221 element.handled = True
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222 data_elt = next(element.elements(NS_IBB, "data"))
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223 sid = data_elt["sid"]
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224
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225 try:
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226 session_data = client.xep_0047_current_stream[sid]
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227 except KeyError:
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228 log.warning(_("Received data for an unknown session id"))
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229 return self._sendError("item-not-found", None, element, client)
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230
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231 from_jid = session_data["to"]
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232 stream_object = session_data["stream_object"]
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233
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234 if from_jid.full() != element["from"]:
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235 log.warning(
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236 _(
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237 "sended jid inconsistency (man in the middle attack attempt ?)\ninitial={initial}\ngiven={given}"
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238 ).format(initial=from_jid, given=element["from"])
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239 )
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240 if element.name == "iq":
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241 self._sendError("not-acceptable", sid, element, client)
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242 return
384
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243
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
244 session_data["seq"] = (session_data["seq"] + 1) % 65535
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
245 if int(data_elt.getAttribute("seq", -1)) != session_data["seq"]:
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Goffi <goffi@goffi.org>
parents: 2927
diff changeset
246 log.warning(_("Sequence error"))
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
247 if element.name == "iq":
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
248 reason = "not-acceptable"
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
249 self._sendError(reason, sid, element, client)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
250 self.terminateStream(session_data, client, reason)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
251 return
384
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Goffi <goffi@goffi.org>
parents:
diff changeset
252
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Goffi <goffi@goffi.org>
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diff changeset
253 # we reset the timeout:
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
254 session_data["timer"].reset(TIMEOUT)
384
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parents:
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255
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diff changeset
256 # we can now decode the data
384
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Goffi <goffi@goffi.org>
parents:
diff changeset
257 try:
2489
e2a7bb875957 plugin pipe/stream, file transfert: refactoring and improvments:
Goffi <goffi@goffi.org>
parents: 2483
diff changeset
258 stream_object.write(base64.b64decode(str(data_elt)))
384
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Goffi <goffi@goffi.org>
parents:
diff changeset
259 except TypeError:
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Goffi <goffi@goffi.org>
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diff changeset
260 # The base64 data is invalid
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Goffi <goffi@goffi.org>
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diff changeset
261 log.warning(_("Invalid base64 data"))
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Goffi <goffi@goffi.org>
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diff changeset
262 if element.name == "iq":
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diff changeset
263 self._sendError("not-acceptable", sid, element, client)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
264 self.terminateStream(session_data, client, reason)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
265 return
384
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parents:
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266
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diff changeset
267 # we can now ack success
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Goffi <goffi@goffi.org>
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diff changeset
268 if element.name == "iq":
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
269 iq_result_elt = xmlstream.toResponse(element, "result")
2129
6a66c8c5a567 core: replaced calls to client.xmlstream.send by client.send which is the right method to use. client.xmlstream should not be used directly
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
270 client.send(iq_result_elt)
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271
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diff changeset
272 def _sendError(self, error_condition, sid, iq_elt, client):
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273 """Send error stanza
384
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274
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275 @param error_condition: one of twisted.words.protocols.jabber.error.STANZA_CONDITIONS keys
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276 @param sid(unicode,None): jingle session id, or None, if session must not be destroyed
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diff changeset
277 @param iq_elt(domish.Element): full <iq> stanza
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278 @param client: %(doc_client)s
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279 """
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Goffi <goffi@goffi.org>
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diff changeset
280 iq_elt = error.StanzaError(error_condition).toResponse(iq_elt)
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281 log.warning(
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diff changeset
282 "Error while managing in-band bytestream session, cancelling: {}".format(
2624
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Goffi <goffi@goffi.org>
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diff changeset
283 error_condition
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
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diff changeset
284 )
56f94936df1e code style reformatting using black
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diff changeset
285 )
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
286 if sid is not None:
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diff changeset
287 self._killSession(sid, client, error_condition)
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Goffi <goffi@goffi.org>
parents: 1934
diff changeset
288 client.send(iq_elt)
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diff changeset
289
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Goffi <goffi@goffi.org>
parents: 2771
diff changeset
290 def startStream(self, client, stream_object, local_jid, to_jid, sid, block_size=None):
384
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parents:
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291 """Launch the stream workflow
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diff changeset
292
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293 @param stream_object(ifaces.IStreamProducer): stream object to send
2927
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Goffi <goffi@goffi.org>
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294 @param local_jid(jid.JID): jid to use as local jid
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parents: 2771
diff changeset
295 This is needed for client which can be addressed with a different jid than
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Goffi <goffi@goffi.org>
parents: 2771
diff changeset
296 client.jid if a local part is used (e.g. piotr@file.example.net where
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Goffi <goffi@goffi.org>
parents: 2771
diff changeset
297 client.jid would be file.example.net)
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diff changeset
298 @param to_jid(jid.JID): JID of the recipient
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diff changeset
299 @param sid(unicode): Stream session id
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parents: 1409
diff changeset
300 @param block_size(int, None): size of the block (or None for default)
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parents: 1409
diff changeset
301 """
2927
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Goffi <goffi@goffi.org>
parents: 2771
diff changeset
302 session_data = self._createSession(client, stream_object, local_jid, to_jid, sid)
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diff changeset
303
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Goffi <goffi@goffi.org>
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diff changeset
304 if block_size is None:
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
305 block_size = XEP_0047.BLOCK_SIZE
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
306 assert block_size <= 65535
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parents: 1409
diff changeset
307 session_data["block_size"] = block_size
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Goffi <goffi@goffi.org>
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diff changeset
308
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Goffi <goffi@goffi.org>
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diff changeset
309 iq_elt = client.IQ()
2927
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Goffi <goffi@goffi.org>
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diff changeset
310 iq_elt["from"] = local_jid.full()
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diff changeset
311 iq_elt["to"] = to_jid.full()
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Goffi <goffi@goffi.org>
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diff changeset
312 open_elt = iq_elt.addElement((NS_IBB, "open"))
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Goffi <goffi@goffi.org>
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diff changeset
313 open_elt["block-size"] = str(block_size)
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Goffi <goffi@goffi.org>
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diff changeset
314 open_elt["sid"] = sid
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
315 open_elt["stanza"] = "iq" # TODO: manage <message> stanza ?
1578
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Goffi <goffi@goffi.org>
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diff changeset
316 args = [session_data, client]
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Goffi <goffi@goffi.org>
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diff changeset
317 d = iq_elt.send()
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diff changeset
318 d.addCallbacks(self._IQDataStreamCb, self._IQDataStreamEb, args, None, args)
1558
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Goffi <goffi@goffi.org>
parents: 1524
diff changeset
319 return session_data[DEFER_KEY]
384
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Goffi <goffi@goffi.org>
parents:
diff changeset
320
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diff changeset
321 def _IQDataStreamCb(self, iq_elt, session_data, client):
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diff changeset
322 """Called during the whole data streaming
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diff changeset
323
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diff changeset
324 @param iq_elt(domish.Element): iq result
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diff changeset
325 @param session_data(dict): data of this streaming session
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diff changeset
326 @param client: %(doc_client)s
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diff changeset
327 """
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
328 session_data["timer"].reset(TIMEOUT)
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 585
diff changeset
329
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Goffi <goffi@goffi.org>
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diff changeset
330 # FIXME: producer/consumer mechanism is not used properly here
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Goffi <goffi@goffi.org>
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diff changeset
331 buffer_ = session_data["stream_object"].file_obj.read(session_data["block_size"])
1524
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Goffi <goffi@goffi.org>
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diff changeset
332 if buffer_:
1578
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Goffi <goffi@goffi.org>
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diff changeset
333 next_iq_elt = client.IQ()
2927
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Goffi <goffi@goffi.org>
parents: 2771
diff changeset
334 next_iq_elt["from"] = session_data["local_jid"].full()
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Goffi <goffi@goffi.org>
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diff changeset
335 next_iq_elt["to"] = session_data["to"].full()
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Goffi <goffi@goffi.org>
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diff changeset
336 data_elt = next_iq_elt.addElement((NS_IBB, "data"))
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diff changeset
337 seq = session_data["seq"] = (session_data["seq"] + 1) % 65535
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Goffi <goffi@goffi.org>
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diff changeset
338 data_elt["seq"] = str(seq)
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diff changeset
339 data_elt["sid"] = session_data["id"]
3392
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Goffi <goffi@goffi.org>
parents: 3137
diff changeset
340 data_elt.addContent(base64.b64encode(buffer_).decode())
1578
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Goffi <goffi@goffi.org>
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diff changeset
341 args = [session_data, client]
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Goffi <goffi@goffi.org>
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diff changeset
342 d = next_iq_elt.send()
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Goffi <goffi@goffi.org>
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diff changeset
343 d.addCallbacks(self._IQDataStreamCb, self._IQDataStreamEb, args, None, args)
384
785420cd63f7 plugins: In-Band Bytestreams (XEP-0047) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
344 else:
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diff changeset
345 self.terminateStream(session_data, client)
384
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Goffi <goffi@goffi.org>
parents:
diff changeset
346
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Goffi <goffi@goffi.org>
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diff changeset
347 def _IQDataStreamEb(self, failure, session_data, client):
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diff changeset
348 if failure.check(error.StanzaError):
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diff changeset
349 log.warning("IBB transfer failed: {}".format(failure.value))
1578
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Goffi <goffi@goffi.org>
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diff changeset
350 else:
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diff changeset
351 log.error("IBB transfer failed: {}".format(failure.value))
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Goffi <goffi@goffi.org>
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diff changeset
352 self.terminateStream(session_data, client, "IQ_ERROR")
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Goffi <goffi@goffi.org>
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diff changeset
353
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Goffi <goffi@goffi.org>
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diff changeset
354 def terminateStream(self, session_data, client, failure_reason=None):
384
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Goffi <goffi@goffi.org>
parents:
diff changeset
355 """Terminate the stream session
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diff changeset
356
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Goffi <goffi@goffi.org>
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diff changeset
357 @param session_data(dict): data of this streaming session
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diff changeset
358 @param client: %(doc_client)s
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Goffi <goffi@goffi.org>
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diff changeset
359 @param failure_reason(unicode, None): reason of the failure, or None if steam was successful
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Goffi <goffi@goffi.org>
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diff changeset
360 """
1578
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Goffi <goffi@goffi.org>
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diff changeset
361 iq_elt = client.IQ()
2927
69e4716d6268 plugins (jingle) file transfer: use initial "from" attribute as local jid instead of client.jid:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
362 iq_elt["from"] = session_data["local_jid"].full()
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
363 iq_elt["to"] = session_data["to"].full()
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
364 close_elt = iq_elt.addElement((NS_IBB, "close"))
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
365 close_elt["sid"] = session_data["id"]
384
785420cd63f7 plugins: In-Band Bytestreams (XEP-0047) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
366 iq_elt.send()
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
367 self._killSession(session_data["id"], client, failure_reason)
384
785420cd63f7 plugins: In-Band Bytestreams (XEP-0047) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
368
594
e629371a28d3 Fix pep8 support in src/plugins.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 588
diff changeset
369
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ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2927
diff changeset
370 @implementer(iwokkel.IDisco)
384
785420cd63f7 plugins: In-Band Bytestreams (XEP-0047) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
371 class XEP_0047_handler(XMPPHandler):
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 585
diff changeset
372
594
e629371a28d3 Fix pep8 support in src/plugins.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 588
diff changeset
373 def __init__(self, parent):
384
785420cd63f7 plugins: In-Band Bytestreams (XEP-0047) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
374 self.plugin_parent = parent
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 585
diff changeset
375
384
785420cd63f7 plugins: In-Band Bytestreams (XEP-0047) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
376 def connectionInitialized(self):
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
377 self.xmlstream.addObserver(
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
378 IBB_OPEN, self.plugin_parent._onIBBOpen, client=self.parent
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
379 )
384
785420cd63f7 plugins: In-Band Bytestreams (XEP-0047) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
380
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
381 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
384
785420cd63f7 plugins: In-Band Bytestreams (XEP-0047) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
382 return [disco.DiscoFeature(NS_IBB)]
785420cd63f7 plugins: In-Band Bytestreams (XEP-0047) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
383
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56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
384 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
384
785420cd63f7 plugins: In-Band Bytestreams (XEP-0047) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
385 return []