Mercurial > libervia-backend
annotate libervia/backend/plugins/plugin_exp_jingle_stream.py @ 4294:a0ed5c976bf8 default tip @
component conferences, plugin XEP-0167, XEP-0298: add stream user metadata:
A/V conference now adds user metadata about the stream it is forwarding through XEP-0298.
This is parsed and added to metadata during confirmation on client side.
rel 448
author | Goffi <goffi@goffi.org> |
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date | Tue, 06 Aug 2024 23:43:11 +0200 |
parents | 0d7bb4df2343 |
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rev | line source |
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3028 | 1 #!/usr/bin/env python3 |
3137 | 2 |
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3 |
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4 # SAT plugin for managing pipes (experimental) |
3479 | 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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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 libervia.backend.core.i18n import _, D_ |
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31 from libervia.backend.core.constants import Const as C |
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32 from libervia.backend.core import exceptions |
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33 from libervia.backend.core.log import getLogger |
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34 from libervia.backend.tools import xml_tools |
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35 from libervia.backend.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 |
3028 | 55 CONFIRM = D_("{peer} wants to send you a stream, do you accept ?") |
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 set_pause(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.set_client_conn(self) |
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82 |
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83 def dataReceived(self, data): |
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84 self.factory.write_to_consumer(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.stream_finished() |
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96 else: |
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97 self.factory.stream_failed(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 set_client_conn(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.set_pause(True) |
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119 |
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120 def start_stream(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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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.set_pause(False) |
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131 return self.deferred |
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132 |
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133 def stream_finished(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 stream_failed(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 stop_stream(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.set_pause(True) |
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158 |
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159 def resumeProducing(self): |
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160 self.client_conn.set_pause(False) |
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161 |
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162 def stopProducing(self): |
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163 if self.client_conn: |
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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: |
3028 | 170 log.warning(_("No client connected, can't send data")) |
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171 |
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172 def write_to_consumer(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""" |
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178 |
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179 def __init__(self, host): |
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180 log.info(_("Plugin Stream initialization")) |
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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.register_application(NS_STREAM, self) |
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184 host.bridge.add_method( |
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185 "stream_out", |
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186 ".plugin", |
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187 in_sign="ss", |
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188 out_sign="s", |
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189 method=self._stream_out, |
3028 | 190 async_=True, |
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191 ) |
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192 |
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193 # jingle callbacks |
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194 |
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195 def _stream_out(self, to_jid_s, profile_key): |
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196 client = self.host.get_client(profile_key) |
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197 return defer.ensureDeferred(self.stream_out(client, jid.JID(to_jid_s))) |
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198 |
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199 async def stream_out(self, client, to_jid): |
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200 """send a stream |
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201 |
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202 @param peer_jid(jid.JID): recipient |
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203 @return: an unique id to identify the transfer |
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204 """ |
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205 port = START_PORT |
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206 factory = StreamFactory() |
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207 while True: |
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208 endpoint = endpoints.TCP4ServerEndpoint(reactor, port) |
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209 try: |
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210 port_listening = await endpoint.listen(factory) |
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211 except error.CannotListenError as e: |
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212 if e.socketError.errno == errno.EADDRINUSE: |
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213 port += 1 |
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214 else: |
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215 raise e |
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216 else: |
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217 factory.port_listening = port_listening |
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218 break |
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219 # we don't want to wait for IQ result of initiate |
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220 defer.ensureDeferred( |
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221 self._j.initiate( |
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222 client, |
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223 to_jid, |
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224 [ |
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225 { |
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226 "app_ns": NS_STREAM, |
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227 "senders": self._j.ROLE_INITIATOR, |
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228 "app_kwargs": {"stream_object": factory}, |
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229 } |
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230 ], |
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231 ) |
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232 ) |
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233 return str(port) |
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234 |
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235 def jingle_session_init(self, client, session, content_name, stream_object): |
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236 content_data = session["contents"][content_name] |
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237 application_data = content_data["application_data"] |
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238 assert "stream_object" not in application_data |
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239 application_data["stream_object"] = stream_object |
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240 desc_elt = domish.Element((NS_STREAM, "description")) |
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241 return desc_elt |
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242 |
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243 @defer.inlineCallbacks |
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244 def jingle_request_confirmation( |
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245 self, client, action, session, content_name, desc_elt |
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246 ): |
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247 """This method request confirmation for a jingle session""" |
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248 content_data = session["contents"][content_name] |
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249 if content_data["senders"] not in ( |
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250 self._j.ROLE_INITIATOR, |
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251 self._j.ROLE_RESPONDER, |
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252 ): |
3028 | 253 log.warning("Bad sender, assuming initiator") |
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254 content_data["senders"] = self._j.ROLE_INITIATOR |
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255 |
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256 confirm_data = yield xml_tools.defer_dialog( |
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257 self.host, |
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258 _(CONFIRM).format(peer=session["peer_jid"].full()), |
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259 _(CONFIRM_TITLE), |
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260 type_=C.XMLUI_DIALOG_CONFIRM, |
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261 action_extra={ |
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262 "from_jid": session["peer_jid"].full(), |
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263 "type": "STREAM", |
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264 }, |
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265 security_limit=SECURITY_LIMIT, |
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266 profile=client.profile, |
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267 ) |
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268 |
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269 if not C.bool(confirm_data["answer"]): |
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270 defer.returnValue(False) |
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271 try: |
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272 port = int(confirm_data["port"]) |
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273 except (ValueError, KeyError): |
3028 | 274 raise exceptions.DataError(_("given port is invalid")) |
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275 endpoint = endpoints.TCP4ClientEndpoint(reactor, "localhost", port) |
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276 factory = StreamFactory() |
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277 yield endpoint.connect(factory) |
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278 content_data["stream_object"] = factory |
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279 finished_d = content_data["finished_d"] = defer.Deferred() |
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280 args = [client, session, content_name, content_data] |
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281 finished_d.addCallbacks(self._finished_cb, self._finished_eb, args, None, args) |
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282 defer.returnValue(True) |
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283 |
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284 def jingle_handler(self, client, action, session, content_name, desc_elt): |
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285 content_data = session["contents"][content_name] |
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286 application_data = content_data["application_data"] |
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287 if action in (self._j.A_ACCEPTED_ACK, self._j.A_SESSION_INITIATE): |
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288 pass |
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289 elif action == self._j.A_SESSION_ACCEPT: |
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290 assert not "stream_object" in content_data |
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291 content_data["stream_object"] = application_data["stream_object"] |
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292 finished_d = content_data["finished_d"] = defer.Deferred() |
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293 args = [client, session, content_name, content_data] |
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294 finished_d.addCallbacks( |
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295 self._finished_cb, self._finished_eb, args, None, args |
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296 ) |
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297 else: |
3028 | 298 log.warning("FIXME: unmanaged action {}".format(action)) |
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299 return desc_elt |
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300 |
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301 def _finished_cb(self, __, client, session, content_name, content_data): |
3028 | 302 log.info("Pipe transfer completed") |
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303 self._j.content_terminate(client, session, content_name) |
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304 content_data["stream_object"].stop_stream() |
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305 |
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306 def _finished_eb(self, failure, client, session, content_name, content_data): |
3028 | 307 log.warning("Error while streaming pipe: {}".format(failure)) |
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308 self._j.content_terminate( |
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309 client, session, content_name, reason=self._j.REASON_FAILED_TRANSPORT |
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310 ) |
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311 content_data["stream_object"].stop_stream() |