Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0033.py @ 4219:1b5cf2ee1d86

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plugin XEP-0384, XEP-0391: download missing devices list: when a peer jid was not in our roster, devices list was not retrieved, resulting in failed en/decryption. This patch does check it and download missing devices list in necessary. There is no subscription managed yet, so the list won't be updated in case of new devices, this should be addressed at some point.
author Goffi <goffi@goffi.org>
date Tue, 05 Mar 2024 17:31:36 +0100
parents 4b842c1fb686
children 0d7bb4df2343
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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 Extended Stanza Addressing (xep-0033)
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5 # Copyright (C) 2013-2016 Adrien Cossa (souliane@mailoo.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 libervia.backend.core.i18n import _
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21 from libervia.backend.core.constants import Const as C
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22 from libervia.backend.core.log import getLogger
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23
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24 log = getLogger(__name__)
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25 from libervia.backend.core import exceptions
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26 from wokkel import disco, iwokkel
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27 from zope.interface import implementer
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28 from twisted.words.protocols.jabber.jid import JID
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29 from twisted.python import failure
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30 import copy
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31
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32 try:
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33 from twisted.words.protocols.xmlstream import XMPPHandler
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34 except ImportError:
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35 from wokkel.subprotocols import XMPPHandler
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36 from twisted.words.xish import domish
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37 from twisted.internet import defer
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38
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39 from libervia.backend.tools import trigger
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40 from time import time
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41
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42 # TODO: fix Prosody "addressing" plugin to leave the concerned bcc according to the spec:
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43 #
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44 # http://xmpp.org/extensions/xep-0033.html#addr-type-bcc
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45 # "This means that the server MUST remove these addresses before the stanza is delivered to anyone other than the given bcc addressee or the multicast service of the bcc addressee."
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46 #
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47 # http://xmpp.org/extensions/xep-0033.html#multicast
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48 # "Each 'bcc' recipient MUST receive only the <address type='bcc'/> associated with that addressee."
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49
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50 # TODO: fix Prosody "addressing" plugin to determine itself if remote servers supports this XEP
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52
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53 NS_XMPP_CLIENT = "jabber:client"
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54 NS_ADDRESS = "http://jabber.org/protocol/address"
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55 ATTRIBUTES = ["jid", "uri", "node", "desc", "delivered", "type"]
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56 ADDRESS_TYPES = ["to", "cc", "bcc", "replyto", "replyroom", "noreply"]
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57
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58 PLUGIN_INFO = {
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59 C.PI_NAME: "Extended Stanza Addressing Protocol Plugin",
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60 C.PI_IMPORT_NAME: "XEP-0033",
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61 C.PI_TYPE: "XEP",
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62 C.PI_PROTOCOLS: ["XEP-0033"],
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63 C.PI_DEPENDENCIES: [],
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64 C.PI_MAIN: "XEP_0033",
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65 C.PI_HANDLER: "yes",
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66 C.PI_DESCRIPTION: _("""Implementation of Extended Stanza Addressing"""),
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67 }
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68
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69
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70 class XEP_0033(object):
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71 """
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72 Implementation for XEP 0033
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73 """
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74
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75 def __init__(self, host):
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76 log.info(_("Extended Stanza Addressing plugin initialization"))
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77 self.host = host
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78 self.internal_data = {}
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79 host.trigger.add(
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80 "sendMessage", self.send_message_trigger, trigger.TriggerManager.MIN_PRIORITY
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81 )
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82 host.trigger.add("message_received", self.message_received_trigger)
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83
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84 def send_message_trigger(
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85 self, client, mess_data, pre_xml_treatments, post_xml_treatments
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86 ):
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87 """Process the XEP-0033 related data to be sent"""
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88 profile = client.profile
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89
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90 def treatment(mess_data):
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91 if not "address" in mess_data["extra"]:
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92 return mess_data
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93
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94 def disco_callback(entities):
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95 if not entities:
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96 log.warning(
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97 _("XEP-0033 is being used but the server doesn't support it!")
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98 )
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99 raise failure.Failure(
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100 exceptions.CancelError("Cancelled by XEP-0033")
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101 )
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102 if mess_data["to"] not in entities:
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103 expected = _(" or ").join([entity.userhost() for entity in entities])
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104 log.warning(
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105 _(
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106 "Stanzas using XEP-0033 should be addressed to %(expected)s, not %(current)s!"
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107 )
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108 % {"expected": expected, "current": mess_data["to"]}
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109 )
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110 log.warning(
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111 _(
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112 "TODO: addressing has been fixed by the backend... fix it in the frontend!"
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113 )
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114 )
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115 mess_data["to"] = list(entities)[0].userhostJID()
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116 element = mess_data["xml"].addElement("addresses", NS_ADDRESS)
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117 entries = [
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118 entry.split(":")
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119 for entry in mess_data["extra"]["address"].split("\n")
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120 if entry != ""
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121 ]
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122 for type_, jid_ in entries:
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123 element.addChild(
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124 domish.Element(
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125 (None, "address"), None, {"type": type_, "jid": jid_}
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126 )
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127 )
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128 # when the prosody plugin is completed, we can immediately return mess_data from here
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129 self.send_and_store_message(mess_data, entries, profile)
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130 log.debug("XEP-0033 took over")
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131 raise failure.Failure(exceptions.CancelError("Cancelled by XEP-0033"))
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132
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133 d = self.host.find_features_set(client, [NS_ADDRESS])
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134 d.addCallbacks(disco_callback, lambda __: disco_callback(None))
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135 return d
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136
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137 post_xml_treatments.addCallback(treatment)
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138 return True
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139
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140 def send_and_store_message(self, mess_data, entries, profile):
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141 """Check if target servers support XEP-0033, send and store the messages
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142 @return: a friendly failure to let the core know that we sent the message already
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143
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144 Later we should be able to remove this method because:
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145 # XXX: sending the messages should be done by the local server
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146 # FIXME: for now we duplicate the messages in the history for each recipient, this should change
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147 # FIXME: for now we duplicate the echoes to the sender, this should also change
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148 Ideas:
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149 - fix Prosody plugin to check if target server support the feature
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150 - redesign the database to save only one entry to the database
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151 - change the message_new signal to eventually pass more than one recipient
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152 """
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153 client = self.host.get_client(profile)
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154
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155 def send(mess_data, skip_send=False):
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156 d = defer.Deferred()
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157 if not skip_send:
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158 d.addCallback(
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159 lambda ret: defer.ensureDeferred(client.send_message_data(ret))
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160 )
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161 d.addCallback(
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162 lambda ret: defer.ensureDeferred(client.message_add_to_history(ret))
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163 )
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164 d.addCallback(client.message_send_to_bridge)
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165 d.addErrback(lambda failure: failure.trap(exceptions.CancelError))
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166 return d.callback(mess_data)
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167
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168 def disco_callback(entities, to_jid_s):
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169 history_data = copy.deepcopy(mess_data)
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170 history_data["to"] = JID(to_jid_s)
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171 history_data["xml"]["to"] = to_jid_s
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172 if entities:
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173 if entities not in self.internal_data[timestamp]:
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174 sent_data = copy.deepcopy(mess_data)
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175 sent_data["to"] = JID(JID(to_jid_s).host)
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176 sent_data["xml"]["to"] = JID(to_jid_s).host
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177 send(sent_data)
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178 self.internal_data[timestamp].append(entities)
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179 # we still need to fill the history and signal the echo...
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180 send(history_data, skip_send=True)
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181 else:
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182 # target server misses the addressing feature
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183 send(history_data)
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184
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185 def errback(failure, to_jid):
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186 disco_callback(None, to_jid)
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187
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188 timestamp = time()
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189 self.internal_data[timestamp] = []
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190 defer_list = []
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191 for type_, jid_ in entries:
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192 d = defer.Deferred()
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193 d.addCallback(
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194 self.host.find_features_set, client=client, jid_=JID(JID(jid_).host)
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195 )
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196 d.addCallbacks(
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197 disco_callback, errback, callbackArgs=[jid_], errbackArgs=[jid_]
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198 )
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199 d.callback([NS_ADDRESS])
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200 defer_list.append(d)
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201 d = defer.Deferred().addCallback(lambda __: self.internal_data.pop(timestamp))
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202 defer.DeferredList(defer_list).chainDeferred(d)
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203
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204 def message_received_trigger(self, client, message, post_treat):
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205 """In order to save the addressing information in the history"""
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206
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207 def post_treat_addr(data, addresses):
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208 data["extra"]["addresses"] = ""
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209 for address in addresses:
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210 # Depending how message has been constructed, we could get here
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211 # some noise like "\n " instead of an address element.
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212 if isinstance(address, domish.Element):
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213 data["extra"]["addresses"] += "%s:%s\n" % (
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214 address["type"],
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215 address["jid"],
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216 )
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217 return data
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218
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219 try:
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220 addresses = next(message.elements(NS_ADDRESS, "addresses"))
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221 except StopIteration:
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222 pass # no addresses
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223 else:
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224 post_treat.addCallback(post_treat_addr, addresses.children)
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225 return True
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226
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227 def get_handler(self, client):
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228 return XEP_0033_handler(self, client.profile)
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229
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230
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231 @implementer(iwokkel.IDisco)
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232 class XEP_0033_handler(XMPPHandler):
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233
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234 def __init__(self, plugin_parent, profile):
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235 self.plugin_parent = plugin_parent
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236 self.host = plugin_parent.host
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237 self.profile = profile
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238
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239 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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240 return [disco.DiscoFeature(NS_ADDRESS)]
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241
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242 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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243 return []