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annotate sat/plugins/plugin_xep_0033.py @ 3913:944f51f9c2b4

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core (xmpp): make `send` a blocking method, fix `sendMessageData` calls: original `send` method is blocking, and it is used as such by Wokkel and thus can't be changed to an async method easily. However, an Async method is necessary to have an async trigger at the very end of the send workflow for end-to-end encryption. To workaround that, `send` is an async method which call `a_send`, an async method which actually does the sending. This way legacy method can still call `send` while `a_send` can be await otherwise. Fix calls to `sendMessageData`: the method now being an `async` one, `ensureDeferred` had to be used in some calls.
author Goffi <goffi@goffi.org>
date Sat, 24 Sep 2022 16:31:39 +0200
parents 888109774673
children 524856bd7b19
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT plugin for 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 sat.core.i18n import _
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21 from sat.core.constants import Const as C
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22 from sat.core.log import getLogger
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23
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24 log = getLogger(__name__)
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25 from sat.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 sat.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.sendMessageTrigger, trigger.TriggerManager.MIN_PRIORITY
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81 )
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82 host.trigger.add("messageReceived", self.messageReceivedTrigger)
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83
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84 def sendMessageTrigger(
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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 discoCallback(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.sendAndStoreMessage(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.findFeaturesSet(client, [NS_ADDRESS])
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134 d.addCallbacks(discoCallback, lambda __: discoCallback(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 sendAndStoreMessage(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 messageNew signal to eventually pass more than one recipient
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152 """
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153 client = self.host.getClient(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.sendMessageData(ret))
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160 )
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161 d.addCallback(
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162 lambda ret: defer.ensureDeferred(client.messageAddToHistory(ret))
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163 )
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164 d.addCallback(client.messageSendToBridge)
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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 discoCallback(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 discoCallback(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.findFeaturesSet, client=client, jid_=JID(JID(jid_).host)
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195 )
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196 d.addCallbacks(
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197 discoCallback, 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 messageReceivedTrigger(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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diff changeset
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 getHandler(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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diff changeset
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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diff changeset
235 self.plugin_parent = plugin_parent
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diff changeset
236 self.host = plugin_parent.host
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diff changeset
237 self.profile = profile
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238
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239 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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diff changeset
240 return [disco.DiscoFeature(NS_ADDRESS)]
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241
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diff changeset
242 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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243 return []