Mercurial > libervia-backend

annotate sat/plugins/plugin_exp_jingle_stream.py @ 3431:5d7569378914

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doc (testing): typos
author Goffi <goffi@goffi.org>
date Fri, 04 Dec 2020 12:27:38 +0100
parents 26a0af6e32c1
children be6d91572633
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rev   line source
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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 pipes (experimental)
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5 # Copyright (C) 2009-2020 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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11
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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 import errno
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21 from zope import interface
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22 from twisted.words.xish import domish
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23 from twisted.words.protocols.jabber import jid
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24 from twisted.internet import defer
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25 from twisted.internet import protocol
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26 from twisted.internet import endpoints
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27 from twisted.internet import reactor
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28 from twisted.internet import error
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29 from twisted.internet import interfaces
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30 from sat.core.i18n import _, D_
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31 from sat.core.constants import Const as C
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32 from sat.core import exceptions
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33 from sat.core.log import getLogger
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34 from sat.tools import xml_tools
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35 from sat.tools import stream
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36
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37
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38 log = getLogger(__name__)
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39
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40 NS_STREAM = "http://salut-a-toi.org/protocol/stream"
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41 SECURITY_LIMIT = 30
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42 START_PORT = 8888
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43
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44 PLUGIN_INFO = {
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45 C.PI_NAME: "Jingle Stream Plugin",
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46 C.PI_IMPORT_NAME: "STREAM",
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47 C.PI_TYPE: "EXP",
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48 C.PI_PROTOCOLS: [],
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49 C.PI_DEPENDENCIES: ["XEP-0166"],
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50 C.PI_MAIN: "JingleStream",
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51 C.PI_HANDLER: "no",
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52 C.PI_DESCRIPTION: _("""Jingle Stream plugin"""),
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53 }
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54
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55 CONFIRM = D_("{peer} wants to send you a stream, do you accept ?")
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56 CONFIRM_TITLE = D_("Stream Request")
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57
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58
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59 class StreamProtocol(protocol.Protocol):
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60 def __init__(self):
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61 self.pause = False
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62
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63 def setPause(self, paused):
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64 # in Python 2.x, Twisted classes are old style
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65 # so we can use property and setter
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66 if paused:
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67 if not self.pause:
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68 self.transport.pauseProducing()
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69 self.pause = True
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70 else:
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71 if self.pause:
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72 self.transport.resumeProducing()
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73 self.pause = False
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74
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75 def disconnect(self):
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76 self.transport.loseConnection()
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77
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78 def connectionMade(self):
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79 if self.factory.client_conn is not None:
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80 self.transport.loseConnection()
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81 self.factory.setClientConn(self)
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82
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83 def dataReceived(self, data):
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84 self.factory.writeToConsumer(data)
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85
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86 def sendData(self, data):
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87 self.transport.write(data)
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88
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89 def connectionLost(self, reason):
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90 if self.factory.client_conn != self:
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91 # only the first connected client_conn is relevant
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92 return
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93
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94 if reason.type == error.ConnectionDone:
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95 self.factory.streamFinished()
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96 else:
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97 self.factory.streamFailed(reason)
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98
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99
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100 @interface.implementer(stream.IStreamProducer)
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101 @interface.implementer(interfaces.IPushProducer)
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102 @interface.implementer(interfaces.IConsumer)
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103 class StreamFactory(protocol.Factory):
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104 protocol = StreamProtocol
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105 consumer = None
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106 producer = None
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107 deferred = None
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108
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109 def __init__(self):
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110 self.client_conn = None
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111
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112 def setClientConn(self, stream_protocol):
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113 # in Python 2.x, Twisted classes are old style
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114 # so we can use property and setter
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115 assert self.client_conn is None
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116 self.client_conn = stream_protocol
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117 if self.consumer is None:
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118 self.client_conn.setPause(True)
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119
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120 def startStream(self, consumer):
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121 if self.consumer is not None:
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122 raise exceptions.InternalError(
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123 _("stream can't be used with multiple consumers")
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124 )
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125 assert self.deferred is None
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126 self.consumer = consumer
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127 consumer.registerProducer(self, True)
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128 self.deferred = defer.Deferred()
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129 if self.client_conn is not None:
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130 self.client_conn.setPause(False)
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131 return self.deferred
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132
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133 def streamFinished(self):
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134 self.client_conn = None
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135 if self.consumer:
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136 self.consumer.unregisterProducer()
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137 self.port_listening.stopListening()
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138 self.deferred.callback(None)
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139
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140 def streamFailed(self, failure_):
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141 self.client_conn = None
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142 if self.consumer:
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143 self.consumer.unregisterProducer()
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144 self.port_listening.stopListening()
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145 self.deferred.errback(failure_)
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146 elif self.producer:
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147 self.producer.stopProducing()
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148
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149 def stopStream(self):
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150 if self.client_conn is not None:
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151 self.client_conn.disconnect()
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152
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153 def registerProducer(self, producer, streaming):
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154 self.producer = producer
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155
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156 def pauseProducing(self):
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157 self.client_conn.setPause(True)
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158
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159 def resumeProducing(self):
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160 self.client_conn.setPause(False)
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161
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162 def stopProducing(self):
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Goffi <goffi@goffi.org>
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163 if self.client_conn:
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Goffi <goffi@goffi.org>
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164 self.client_conn.disconnect()
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165
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166 def write(self, data):
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167 try:
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168 self.client_conn.sendData(data)
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169 except AttributeError:
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170 log.warning(_("No client connected, can't send data"))
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171
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172 def writeToConsumer(self, data):
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173 self.consumer.write(data)
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174
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175
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176 class JingleStream(object):
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177 """This non standard jingle application send byte stream"""
401
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parents:
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178
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179 def __init__(self, host):
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180 log.info(_("Plugin Stream initialization"))
401
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parents:
diff changeset
181 self.host = host
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182 self._j = host.plugins["XEP-0166"] # shortcut to access jingle
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183 self._j.registerApplication(NS_STREAM, self)
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diff changeset
184 host.bridge.addMethod(
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185 "streamOut",
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diff changeset
186 ".plugin",
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diff changeset
187 in_sign="ss",
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188 out_sign="s",
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189 method=self._streamOut,
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190 async_=True,
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191 )
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192
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193 # jingle callbacks
401
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194
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diff changeset
195 def _streamOut(self, to_jid_s, profile_key):
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196 client = self.host.getClient(profile_key)
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diff changeset
197 return defer.ensureDeferred(self.streamOut(client, jid.JID(to_jid_s)))
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parents:
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198
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diff changeset
199 async def streamOut(self, client, to_jid):
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200 """send a stream
401
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parents:
diff changeset
201
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202 @param peer_jid(jid.JID): recipient
401
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parents:
diff changeset
203 @return: an unique id to identify the transfer
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parents:
diff changeset
204 """
2489
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diff changeset
205 port = START_PORT
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
206 factory = StreamFactory()
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
207 while True:
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Goffi <goffi@goffi.org>
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diff changeset
208 endpoint = endpoints.TCP4ServerEndpoint(reactor, port)
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parents: 2483
diff changeset
209 try:
3404
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diff changeset
210 port_listening = await endpoint.listen(factory)
2489
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diff changeset
211 except error.CannotListenError as e:
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
212 if e.socketError.errno == errno.EADDRINUSE:
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parents: 2483
diff changeset
213 port += 1
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
214 else:
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
215 raise e
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
216 else:
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
217 factory.port_listening = port_listening
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Goffi <goffi@goffi.org>
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diff changeset
218 break
3404
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diff changeset
219 # we don't want to wait for IQ result of initiate
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diff changeset
220 defer.ensureDeferred(self._j.initiate(
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diff changeset
221 client,
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parents: 2562
diff changeset
222 to_jid,
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parents: 2562
diff changeset
223 [
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parents: 2562
diff changeset
224 {
56f94936df1e code style reformatting using black
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parents: 2562
diff changeset
225 "app_ns": NS_STREAM,
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parents: 2562
diff changeset
226 "senders": self._j.ROLE_INITIATOR,
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parents: 2562
diff changeset
227 "app_kwargs": {"stream_object": factory},
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diff changeset
228 }
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parents: 2562
diff changeset
229 ],
3404
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parents: 3137
diff changeset
230 ))
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Goffi <goffi@goffi.org>
parents: 3137
diff changeset
231 return str(port)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
232
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diff changeset
233 def jingleSessionInit(self, client, session, content_name, stream_object):
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234 content_data = session["contents"][content_name]
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diff changeset
235 application_data = content_data["application_data"]
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
236 assert "stream_object" not in application_data
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
237 application_data["stream_object"] = stream_object
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diff changeset
238 desc_elt = domish.Element((NS_STREAM, "description"))
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
239 return desc_elt
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 585
diff changeset
240
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diff changeset
241 @defer.inlineCallbacks
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Goffi <goffi@goffi.org>
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diff changeset
242 def jingleRequestConfirmation(self, client, action, session, content_name, desc_elt):
1669
697effba0310 plugin pipe: rewritten plugin as a jingle application. The current implentation can, in some cases, block the backend, and is experimental only. Improvments are needed in the future.
Goffi <goffi@goffi.org>
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diff changeset
243 """This method request confirmation for a jingle session"""
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244 content_data = session["contents"][content_name]
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diff changeset
245 if content_data["senders"] not in (
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Goffi <goffi@goffi.org>
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diff changeset
246 self._j.ROLE_INITIATOR,
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parents: 2562
diff changeset
247 self._j.ROLE_RESPONDER,
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diff changeset
248 ):
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diff changeset
249 log.warning("Bad sender, assuming initiator")
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diff changeset
250 content_data["senders"] = self._j.ROLE_INITIATOR
587
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parents: 585
diff changeset
251
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diff changeset
252 confirm_data = yield xml_tools.deferDialog(
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parents: 2562
diff changeset
253 self.host,
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diff changeset
254 _(CONFIRM).format(peer=session["peer_jid"].full()),
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
255 _(CONFIRM_TITLE),
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diff changeset
256 type_=C.XMLUI_DIALOG_CONFIRM,
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parents: 2562
diff changeset
257 action_extra={
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258 "meta_from_jid": session["peer_jid"].full(),
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259 "meta_type": "STREAM",
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260 },
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261 security_limit=SECURITY_LIMIT,
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262 profile=client.profile,
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263 )
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264
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265 if not C.bool(confirm_data["answer"]):
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266 defer.returnValue(False)
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267 try:
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268 port = int(confirm_data["port"])
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269 except (ValueError, KeyError):
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270 raise exceptions.DataError(_("given port is invalid"))
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271 endpoint = endpoints.TCP4ClientEndpoint(reactor, "localhost", port)
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272 factory = StreamFactory()
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273 yield endpoint.connect(factory)
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274 content_data["stream_object"] = factory
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275 finished_d = content_data["finished_d"] = defer.Deferred()
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276 args = [client, session, content_name, content_data]
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277 finished_d.addCallbacks(self._finishedCb, self._finishedEb, args, None, args)
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278 defer.returnValue(True)
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279
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280 def jingleHandler(self, client, action, session, content_name, desc_elt):
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281 content_data = session["contents"][content_name]
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282 application_data = content_data["application_data"]
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283 if action in (self._j.A_ACCEPTED_ACK, self._j.A_SESSION_INITIATE):
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284 pass
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285 elif action == self._j.A_SESSION_ACCEPT:
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286 assert not "stream_object" in content_data
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287 content_data["stream_object"] = application_data["stream_object"]
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288 finished_d = content_data["finished_d"] = defer.Deferred()
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289 args = [client, session, content_name, content_data]
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290 finished_d.addCallbacks(self._finishedCb, self._finishedEb, args, None, args)
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291 else:
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292 log.warning("FIXME: unmanaged action {}".format(action))
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293 return desc_elt
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294
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295 def _finishedCb(self, __, client, session, content_name, content_data):
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296 log.info("Pipe transfer completed")
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297 self._j.contentTerminate(client, session, content_name)
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298 content_data["stream_object"].stopStream()
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299
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300 def _finishedEb(self, failure, client, session, content_name, content_data):
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301 log.warning("Error while streaming pipe: {}".format(failure))
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302 self._j.contentTerminate(
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303 client, session, content_name, reason=self._j.REASON_FAILED_TRANSPORT
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304 )
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305 content_data["stream_object"].stopStream()