Mercurial > libervia-backend

annotate sat/plugins/plugin_exp_jingle_stream.py @ 3162:b5c058c7692e

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core (xmpp), plugin android: fixed DNS, SRV handling on Android: Android doesn't have a "/etc/resolv.conf" that Twisted expect. As a result, SRV records can't be checked correctly on connection. To work around that, DNS servers used on Android are checked when necessary (on Android plugin startup and on connectivity change), using some hacks, and Twisted is patched to use them.
author Goffi <goffi@goffi.org>
date Sun, 09 Feb 2020 23:56:42 +0100
parents 559a625a236b
children 26a0af6e32c1
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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 from sat.core.i18n import _, D_
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21 from sat.core.constants import Const as C
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22 from sat.core import exceptions
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23 from sat.core.log import getLogger
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24
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25 log = getLogger(__name__)
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26 from sat.tools import xml_tools
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27 from sat.tools import stream
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28 from twisted.words.xish import domish
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29 from twisted.words.protocols.jabber import jid
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30 from twisted.internet import defer
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31 from twisted.internet import protocol
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32 from twisted.internet import endpoints
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33 from twisted.internet import reactor
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34 from twisted.internet import error
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35 from twisted.internet import interfaces
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36 from zope import interface
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37 import errno
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38
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39 NS_STREAM = "http://salut-a-toi.org/protocol/stream"
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40 SECURITY_LIMIT = 30
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41 START_PORT = 8888
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42
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43 PLUGIN_INFO = {
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44 C.PI_NAME: "Jingle Stream Plugin",
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45 C.PI_IMPORT_NAME: "STREAM",
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46 C.PI_TYPE: "EXP",
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47 C.PI_PROTOCOLS: [],
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48 C.PI_DEPENDENCIES: ["XEP-0166"],
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49 C.PI_MAIN: "JingleStream",
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50 C.PI_HANDLER: "no",
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51 C.PI_DESCRIPTION: _("""Jingle Stream plugin"""),
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52 }
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53
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54 CONFIRM = D_("{peer} wants to send you a stream, do you accept ?")
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55 CONFIRM_TITLE = D_("Stream Request")
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56
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57
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58 class StreamProtocol(protocol.Protocol):
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59 def __init__(self):
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60 self.pause = False
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61
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62 def setPause(self, paused):
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63 # in Python 2.x, Twisted classes are old style
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64 # so we can use property and setter
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65 if paused:
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66 if not self.pause:
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67 self.transport.pauseProducing()
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68 self.pause = True
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69 else:
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70 if self.pause:
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71 self.transport.resumeProducing()
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72 self.pause = False
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73
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74 def disconnect(self):
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75 self.transport.loseConnection()
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76
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77 def connectionMade(self):
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78 if self.factory.client_conn is not None:
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79 self.transport.loseConnection()
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80 self.factory.setClientConn(self)
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81
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82 def dataReceived(self, data):
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83 self.factory.writeToConsumer(data)
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84
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85 def sendData(self, data):
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86 self.transport.write(data)
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87
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88 def connectionLost(self, reason):
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89 if self.factory.client_conn != self:
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90 # only the first connected client_conn is relevant
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91 return
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92
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93 if reason.type == error.ConnectionDone:
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94 self.factory.streamFinished()
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95 else:
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96 self.factory.streamFailed(reason)
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97
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98
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99 @interface.implementer(stream.IStreamProducer)
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100 @interface.implementer(interfaces.IPushProducer)
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101 @interface.implementer(interfaces.IConsumer)
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102 class StreamFactory(protocol.Factory):
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103 protocol = StreamProtocol
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104 consumer = None
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105 producer = None
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106 deferred = None
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107
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108 def __init__(self):
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109 self.client_conn = None
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110
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111 def setClientConn(self, stream_protocol):
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112 # in Python 2.x, Twisted classes are old style
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113 # so we can use property and setter
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114 assert self.client_conn is None
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115 self.client_conn = stream_protocol
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116 if self.consumer is None:
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117 self.client_conn.setPause(True)
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118
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119 def startStream(self, consumer):
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120 if self.consumer is not None:
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121 raise exceptions.InternalError(
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122 _("stream can't be used with multiple consumers")
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123 )
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124 assert self.deferred is None
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125 self.consumer = consumer
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126 consumer.registerProducer(self, True)
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127 self.deferred = defer.Deferred()
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128 if self.client_conn is not None:
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129 self.client_conn.setPause(False)
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130 return self.deferred
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131
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132 def streamFinished(self):
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133 self.client_conn = None
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134 if self.consumer:
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135 self.consumer.unregisterProducer()
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136 self.port_listening.stopListening()
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diff changeset
137 self.deferred.callback(None)
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138
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139 def streamFailed(self, failure_):
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140 self.client_conn = None
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141 if self.consumer:
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142 self.consumer.unregisterProducer()
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diff changeset
143 self.port_listening.stopListening()
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diff changeset
144 self.deferred.errback(failure_)
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145 elif self.producer:
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diff changeset
146 self.producer.stopProducing()
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147
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148 def stopStream(self):
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149 if self.client_conn is not None:
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150 self.client_conn.disconnect()
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151
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152 def registerProducer(self, producer, streaming):
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153 self.producer = producer
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154
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155 def pauseProducing(self):
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156 self.client_conn.setPause(True)
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157
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158 def resumeProducing(self):
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159 self.client_conn.setPause(False)
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160
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161 def stopProducing(self):
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Goffi <goffi@goffi.org>
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162 if self.client_conn:
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163 self.client_conn.disconnect()
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164
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165 def write(self, data):
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diff changeset
166 try:
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167 self.client_conn.sendData(data)
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168 except AttributeError:
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169 log.warning(_("No client connected, can't send data"))
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170
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171 def writeToConsumer(self, data):
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172 self.consumer.write(data)
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173
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diff changeset
174
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diff changeset
175 class JingleStream(object):
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176 """This non standard jingle application send byte stream"""
401
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parents:
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177
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diff changeset
178 def __init__(self, host):
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179 log.info(_("Plugin Stream initialization"))
401
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parents:
diff changeset
180 self.host = host
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181 self._j = host.plugins["XEP-0166"] # shortcut to access jingle
2489
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182 self._j.registerApplication(NS_STREAM, self)
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diff changeset
183 host.bridge.addMethod(
56f94936df1e code style reformatting using black
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diff changeset
184 "streamOut",
56f94936df1e code style reformatting using black
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diff changeset
185 ".plugin",
56f94936df1e code style reformatting using black
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diff changeset
186 in_sign="ss",
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diff changeset
187 out_sign="s",
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diff changeset
188 method=self._streamOut,
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diff changeset
189 async_=True,
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diff changeset
190 )
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191
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diff changeset
192 # jingle callbacks
401
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parents:
diff changeset
193
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diff changeset
194 def _streamOut(self, to_jid_s, profile_key):
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diff changeset
195 client = self.host.getClient(profile_key)
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diff changeset
196 return self.streamOut(client, jid.JID(to_jid_s))
401
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Goffi <goffi@goffi.org>
parents:
diff changeset
197
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diff changeset
198 @defer.inlineCallbacks
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diff changeset
199 def streamOut(self, client, to_jid):
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diff changeset
200 """send a stream
401
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Goffi <goffi@goffi.org>
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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Goffi <goffi@goffi.org>
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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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
209 try:
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
210 port_listening = yield endpoint.listen(factory)
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Goffi <goffi@goffi.org>
parents: 2483
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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Goffi <goffi@goffi.org>
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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parents: 2483
diff changeset
218 break
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parents: 2562
diff changeset
219 self._j.initiate(
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parents: 2562
diff changeset
220 client,
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parents: 2562
diff changeset
221 to_jid,
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parents: 2562
diff changeset
222 [
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parents: 2562
diff changeset
223 {
56f94936df1e code style reformatting using black
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parents: 2562
diff changeset
224 "app_ns": NS_STREAM,
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
225 "senders": self._j.ROLE_INITIATOR,
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
226 "app_kwargs": {"stream_object": factory},
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
227 }
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
228 ],
56f94936df1e code style reformatting using black
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parents: 2562
diff changeset
229 )
3028
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parents: 2771
diff changeset
230 defer.returnValue(str(port))
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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>
parents: 1409
diff changeset
231
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diff changeset
232 def jingleSessionInit(self, client, session, content_name, stream_object):
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233 content_data = session["contents"][content_name]
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
234 application_data = content_data["application_data"]
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
235 assert "stream_object" not in application_data
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
236 application_data["stream_object"] = stream_object
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
237 desc_elt = domish.Element((NS_STREAM, "description"))
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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>
parents: 1409
diff changeset
238 return desc_elt
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 585
diff changeset
239
2489
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Goffi <goffi@goffi.org>
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diff changeset
240 @defer.inlineCallbacks
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Goffi <goffi@goffi.org>
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diff changeset
241 def jingleRequestConfirmation(self, client, action, session, content_name, desc_elt):
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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
242 """This method request confirmation for a jingle session"""
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diff changeset
243 content_data = session["contents"][content_name]
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
244 if content_data["senders"] not in (
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
245 self._j.ROLE_INITIATOR,
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
246 self._j.ROLE_RESPONDER,
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
247 ):
3028
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parents: 2771
diff changeset
248 log.warning("Bad sender, assuming initiator")
2624
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parents: 2562
diff changeset
249 content_data["senders"] = self._j.ROLE_INITIATOR
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 585
diff changeset
250
2624
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parents: 2562
diff changeset
251 confirm_data = yield xml_tools.deferDialog(
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parents: 2562
diff changeset
252 self.host,
56f94936df1e code style reformatting using black
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diff changeset
253 _(CONFIRM).format(peer=session["peer_jid"].full()),
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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>
parents: 1409
diff changeset
254 _(CONFIRM_TITLE),
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parents: 2483
diff changeset
255 type_=C.XMLUI_DIALOG_CONFIRM,
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parents: 2562
diff changeset
256 action_extra={
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parents: 2562
diff changeset
257 "meta_from_jid": session["peer_jid"].full(),
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Goffi <goffi@goffi.org>
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258 "meta_type": "STREAM",
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259 },
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260 security_limit=SECURITY_LIMIT,
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261 profile=client.profile,
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262 )
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263
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264 if not C.bool(confirm_data["answer"]):
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265 defer.returnValue(False)
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266 try:
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267 port = int(confirm_data["port"])
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268 except (ValueError, KeyError):
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269 raise exceptions.DataError(_("given port is invalid"))
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270 endpoint = endpoints.TCP4ClientEndpoint(reactor, "localhost", port)
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271 factory = StreamFactory()
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272 yield endpoint.connect(factory)
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273 content_data["stream_object"] = factory
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274 finished_d = content_data["finished_d"] = defer.Deferred()
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275 args = [client, session, content_name, content_data]
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276 finished_d.addCallbacks(self._finishedCb, self._finishedEb, args, None, args)
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277 defer.returnValue(True)
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278
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279 def jingleHandler(self, client, action, session, content_name, desc_elt):
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280 content_data = session["contents"][content_name]
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281 application_data = content_data["application_data"]
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282 if action in (self._j.A_ACCEPTED_ACK, self._j.A_SESSION_INITIATE):
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283 pass
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284 elif action == self._j.A_SESSION_ACCEPT:
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285 assert not "stream_object" in content_data
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286 content_data["stream_object"] = application_data["stream_object"]
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287 finished_d = content_data["finished_d"] = defer.Deferred()
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288 args = [client, session, content_name, content_data]
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289 finished_d.addCallbacks(self._finishedCb, self._finishedEb, args, None, args)
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290 else:
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291 log.warning("FIXME: unmanaged action {}".format(action))
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292 return desc_elt
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293
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294 def _finishedCb(self, __, client, session, content_name, content_data):
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295 log.info("Pipe transfer completed")
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296 self._j.contentTerminate(client, session, content_name)
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297 content_data["stream_object"].stopStream()
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298
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299 def _finishedEb(self, failure, client, session, content_name, content_data):
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300 log.warning("Error while streaming pipe: {}".format(failure))
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301 self._j.contentTerminate(
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302 client, session, content_name, reason=self._j.REASON_FAILED_TRANSPORT
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303 )
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304 content_data["stream_object"].stopStream()