annotate src/plugins/plugin_xep_0033.py @ 2138:6e509ee853a8

plugin OTR, core; use of new sendMessage + OTR mini refactoring: - new client.sendMessage method is used instead of sendMessageToStream - client.feedback is used in OTR - OTR now add message processing hints and carbon private element as recommanded by XEP-0364. Explicit Message Encryption is still TODO - OTR use the new sendMessageFinish trigger, this has a number of advantages: * there is little risk that OTR is skipped by other plugins (they have to use client.sendMessage as recommanded) * being at the end of the chain, OTR can check and remove any HTML or other leaking elements * OTR doesn't have to skip other plugins anymore, this means that things like delivery receipts are now working with OTR (but because there is not full stanza encryption, they can leak metadata) * OTR can decide to follow storage hint by letting or deleting "history" key
author Goffi <goffi@goffi.org>
date Sun, 05 Feb 2017 15:00:01 +0100
parents a2bc5089c2eb
children 1d3f73e065e1
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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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.log import getLogger
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22 log = getLogger(__name__)
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23 from sat.core import exceptions
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24 from wokkel import disco, iwokkel
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25 from zope.interface import implements
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26 from twisted.words.protocols.jabber.jid import JID
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27 from twisted.python import failure
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28 import copy
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29 try:
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30 from twisted.words.protocols.xmlstream import XMPPHandler
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31 except ImportError:
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32 from wokkel.subprotocols import XMPPHandler
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33 from twisted.words.xish import domish
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34 from twisted.internet import defer
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35
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36 from sat.tools import trigger
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37 from time import time
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38
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39 # TODO: fix Prosody "addressing" plugin to leave the concerned bcc according to the spec:
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40 #
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41 # http://xmpp.org/extensions/xep-0033.html#addr-type-bcc
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42 # "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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43 #
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44 # http://xmpp.org/extensions/xep-0033.html#multicast
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45 # "Each 'bcc' recipient MUST receive only the <address type='bcc'/> associated with that addressee."
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46
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47 # TODO: fix Prosody "addressing" plugin to determine itself if remote servers supports this XEP
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49
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50 NS_XMPP_CLIENT = "jabber:client"
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51 NS_ADDRESS = "http://jabber.org/protocol/address"
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52 ATTRIBUTES = ["jid", "uri", "node", "desc", "delivered", "type"]
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53 ADDRESS_TYPES = ["to", "cc", "bcc", "replyto", "replyroom", "noreply"]
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54
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55 PLUGIN_INFO = {
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56 "name": "Extended Stanza Addressing Protocol Plugin",
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57 "import_name": "XEP-0033",
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58 "type": "XEP",
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59 "protocols": ["XEP-0033"],
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60 "dependencies": [],
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61 "main": "XEP_0033",
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62 "handler": "yes",
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63 "description": _("""Implementation of Extended Stanza Addressing""")
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64 }
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65
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66
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67 class XEP_0033(object):
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68 """
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69 Implementation for XEP 0033
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70 """
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71 def __init__(self, host):
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72 log.info(_("Extended Stanza Addressing plugin initialization"))
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73 self.host = host
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74 self.internal_data = {}
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75 host.trigger.add("messageSend", self.messageSendTrigger, trigger.TriggerManager.MIN_PRIORITY)
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76 host.trigger.add("MessageReceived", self.messageReceivedTrigger)
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77
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78 def messageSendTrigger(self, client, mess_data, pre_xml_treatments, post_xml_treatments):
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79 """Process the XEP-0033 related data to be sent"""
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80 profile = client.profile
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81
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82 def treatment(mess_data):
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83 if not 'address' in mess_data['extra']:
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84 return mess_data
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85
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86 def discoCallback(entities):
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87 if not entities:
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88 log.warning(_("XEP-0033 is being used but the server doesn't support it!"))
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89 raise failure.Failure(exceptions.CancelError(u'Cancelled by XEP-0033'))
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90 if mess_data["to"] not in entities:
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91 expected = _(' or ').join([entity.userhost() for entity in entities])
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92 log.warning(_(u"Stanzas using XEP-0033 should be addressed to %(expected)s, not %(current)s!") % {'expected': expected, 'current': mess_data["to"]})
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93 log.warning(_(u"TODO: addressing has been fixed by the backend... fix it in the frontend!"))
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94 mess_data["to"] = list(entities)[0].userhostJID()
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95 element = mess_data['xml'].addElement('addresses', NS_ADDRESS)
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96 entries = [entry.split(':') for entry in mess_data['extra']['address'].split('\n') if entry != '']
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97 for type_, jid_ in entries:
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98 element.addChild(domish.Element((None, 'address'), None, {'type': type_, 'jid': jid_}))
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99 # when the prosody plugin is completed, we can immediately return mess_data from here
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100 self.sendAndStoreMessage(mess_data, entries, profile)
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101 log.debug("XEP-0033 took over")
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102 raise failure.Failure(exceptions.CancelError(u'Cancelled by XEP-0033'))
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103 d = self.host.findFeaturesSet([NS_ADDRESS], profile=profile)
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104 d.addCallbacks(discoCallback, lambda dummy: discoCallback(None))
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105 return d
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106
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107 post_xml_treatments.addCallback(treatment)
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108 return True
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109
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110 def sendAndStoreMessage(self, mess_data, entries, profile):
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111 """Check if target servers support XEP-0033, send and store the messages
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112 @return: a friendly failure to let the core know that we sent the message already
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113
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114 Later we should be able to remove this method because:
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115 # XXX: sending the messages should be done by the local server
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116 # FIXME: for now we duplicate the messages in the history for each recipient, this should change
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117 # FIXME: for now we duplicate the echoes to the sender, this should also change
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118 Ideas:
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119 - fix Prosody plugin to check if target server support the feature
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120 - redesign the database to save only one entry to the database
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121 - change the messageNew signal to eventually pass more than one recipient
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122 """
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123 def send(mess_data, skip_send=False):
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124 client = self.host.profiles[profile]
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125 d = defer.Deferred()
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126 if not skip_send:
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127 d.addCallback(client.sendMessage)
1963
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Goffi <goffi@goffi.org>
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128 d.addCallback(self.host.messageAddToHistory, client)
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129 d.addCallback(self.host.messageSendToBridge, client)
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130 d.addErrback(lambda failure: failure.trap(exceptions.CancelError))
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parents: 1052
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131 return d.callback(mess_data)
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132
999
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133 def discoCallback(entities, to_jid_s):
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134 history_data = copy.deepcopy(mess_data)
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135 history_data['to'] = JID(to_jid_s)
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136 history_data['xml']['to'] = to_jid_s
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137 if entities:
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souliane <souliane@mailoo.org>
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138 if entities not in self.internal_data[timestamp]:
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139 sent_data = copy.deepcopy(mess_data)
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140 sent_data['to'] = JID(JID(to_jid_s).host)
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141 sent_data['xml']['to'] = JID(to_jid_s).host
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142 send(sent_data)
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143 self.internal_data[timestamp].append(entities)
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144 # we still need to fill the history and signal the echo...
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parents: 1052
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145 send(history_data, skip_send=True)
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146 else:
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147 # target server misses the addressing feature
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148 send(history_data)
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149
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150 def errback(failure, to_jid):
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151 discoCallback(None, to_jid)
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152
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153 timestamp = time()
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154 self.internal_data[timestamp] = []
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155 defer_list = []
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156 for type_, jid_ in entries:
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157 d = defer.Deferred()
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Goffi <goffi@goffi.org>
parents: 1409
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158 d.addCallback(self.host.findFeaturesSet, jid_=JID(JID(jid_).host), profile=profile)
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159 d.addCallbacks(discoCallback, errback, callbackArgs=[jid_], errbackArgs=[jid_])
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160 d.callback([NS_ADDRESS])
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161 defer_list.append(d)
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162 d = defer.Deferred().addCallback(lambda dummy: self.internal_data.pop(timestamp))
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163 defer.DeferredList(defer_list).chainDeferred(d)
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164
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165 def messageReceivedTrigger(self, client, message, post_treat):
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166 """In order to save the addressing information in the history"""
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167 def post_treat_addr(data, addresses):
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168 data['extra']['addresses'] = ""
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169 for address in addresses:
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170 # Depending how message has been constructed, we could get here
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souliane <souliane@mailoo.org>
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171 # some noise like "\n " instead of an address element.
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souliane <souliane@mailoo.org>
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172 if isinstance(address, domish.Element):
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173 data['extra']['addresses'] += '%s:%s\n' % (address['type'], address['jid'])
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174 return data
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175
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parents:
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176 try:
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177 addresses = message.elements(NS_ADDRESS, 'addresses').next()
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178 except StopIteration:
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179 pass # no addresses
1955
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parents: 1934
diff changeset
180 else:
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181 post_treat.addCallback(post_treat_addr, addresses.children)
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182 return True
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183
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parents:
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184 def getHandler(self, profile):
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185 return XEP_0033_handler(self, profile)
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186
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souliane <souliane@mailoo.org>
parents:
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187
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parents:
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188 class XEP_0033_handler(XMPPHandler):
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189 implements(iwokkel.IDisco)
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190
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parents:
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191 def __init__(self, plugin_parent, profile):
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192 self.plugin_parent = plugin_parent
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193 self.host = plugin_parent.host
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194 self.profile = profile
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parents:
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195
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parents:
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196 def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
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197 return [disco.DiscoFeature(NS_ADDRESS)]
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198
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parents:
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199 def getDiscoItems(self, requestor, target, nodeIdentifier=''):
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parents:
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200 return []