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annotate src/plugins/plugin_xep_0033.py @ 2331:01877048c94a

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author Goffi <goffi@goffi.org>
date Thu, 13 Jul 2017 22:49:37 +0200
parents 6a004a22dd9e
children
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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.constants import Const as C
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22 from sat.core.log import getLogger
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23 log = getLogger(__name__)
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24 from sat.core import exceptions
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25 from wokkel import disco, iwokkel
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26 from zope.interface import implements
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27 from twisted.words.protocols.jabber.jid import JID
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28 from twisted.python import failure
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29 import copy
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30 try:
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31 from twisted.words.protocols.xmlstream import XMPPHandler
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32 except ImportError:
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33 from wokkel.subprotocols import XMPPHandler
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34 from twisted.words.xish import domish
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35 from twisted.internet import defer
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36
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37 from sat.tools import trigger
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38 from time import time
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40 # TODO: fix Prosody "addressing" plugin to leave the concerned bcc according to the spec:
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41 #
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42 # http://xmpp.org/extensions/xep-0033.html#addr-type-bcc
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43 # "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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44 #
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45 # http://xmpp.org/extensions/xep-0033.html#multicast
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46 # "Each 'bcc' recipient MUST receive only the <address type='bcc'/> associated with that addressee."
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48 # TODO: fix Prosody "addressing" plugin to determine itself if remote servers supports this XEP
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50
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51 NS_XMPP_CLIENT = "jabber:client"
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52 NS_ADDRESS = "http://jabber.org/protocol/address"
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53 ATTRIBUTES = ["jid", "uri", "node", "desc", "delivered", "type"]
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54 ADDRESS_TYPES = ["to", "cc", "bcc", "replyto", "replyroom", "noreply"]
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55
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56 PLUGIN_INFO = {
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57 C.PI_NAME: "Extended Stanza Addressing Protocol Plugin",
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58 C.PI_IMPORT_NAME: "XEP-0033",
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59 C.PI_TYPE: "XEP",
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60 C.PI_PROTOCOLS: ["XEP-0033"],
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61 C.PI_DEPENDENCIES: [],
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62 C.PI_MAIN: "XEP_0033",
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63 C.PI_HANDLER: "yes",
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64 C.PI_DESCRIPTION: _("""Implementation of Extended Stanza Addressing""")
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65 }
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66
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67
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68 class XEP_0033(object):
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69 """
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70 Implementation for XEP 0033
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71 """
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72 def __init__(self, host):
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73 log.info(_("Extended Stanza Addressing plugin initialization"))
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74 self.host = host
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75 self.internal_data = {}
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76 host.trigger.add("sendMessage", self.sendMessageTrigger, trigger.TriggerManager.MIN_PRIORITY)
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77 host.trigger.add("MessageReceived", self.messageReceivedTrigger)
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78
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79 def sendMessageTrigger(self, client, mess_data, pre_xml_treatments, post_xml_treatments):
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80 """Process the XEP-0033 related data to be sent"""
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81 profile = client.profile
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82
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83 def treatment(mess_data):
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84 if not 'address' in mess_data['extra']:
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85 return mess_data
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86
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87 def discoCallback(entities):
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88 if not entities:
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89 log.warning(_("XEP-0033 is being used but the server doesn't support it!"))
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90 raise failure.Failure(exceptions.CancelError(u'Cancelled by XEP-0033'))
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91 if mess_data["to"] not in entities:
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92 expected = _(' or ').join([entity.userhost() for entity in entities])
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93 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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94 log.warning(_(u"TODO: addressing has been fixed by the backend... fix it in the frontend!"))
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95 mess_data["to"] = list(entities)[0].userhostJID()
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96 element = mess_data['xml'].addElement('addresses', NS_ADDRESS)
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97 entries = [entry.split(':') for entry in mess_data['extra']['address'].split('\n') if entry != '']
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98 for type_, jid_ in entries:
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99 element.addChild(domish.Element((None, 'address'), None, {'type': type_, 'jid': jid_}))
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100 # when the prosody plugin is completed, we can immediately return mess_data from here
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101 self.sendAndStoreMessage(mess_data, entries, profile)
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102 log.debug("XEP-0033 took over")
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103 raise failure.Failure(exceptions.CancelError(u'Cancelled by XEP-0033'))
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104 d = self.host.findFeaturesSet(client, [NS_ADDRESS])
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105 d.addCallbacks(discoCallback, lambda dummy: discoCallback(None))
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106 return d
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107
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108 post_xml_treatments.addCallback(treatment)
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109 return True
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110
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111 def sendAndStoreMessage(self, mess_data, entries, profile):
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112 """Check if target servers support XEP-0033, send and store the messages
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113 @return: a friendly failure to let the core know that we sent the message already
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114
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115 Later we should be able to remove this method because:
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116 # XXX: sending the messages should be done by the local server
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117 # FIXME: for now we duplicate the messages in the history for each recipient, this should change
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118 # FIXME: for now we duplicate the echoes to the sender, this should also change
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119 Ideas:
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120 - fix Prosody plugin to check if target server support the feature
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121 - redesign the database to save only one entry to the database
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122 - change the messageNew signal to eventually pass more than one recipient
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123 """
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124 client = self.host.getClient(profile)
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125 def send(mess_data, skip_send=False):
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126 d = defer.Deferred()
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127 if not skip_send:
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128 d.addCallback(client.sendMessageData)
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129 d.addCallback(client.messageAddToHistory)
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130 d.addCallback(client.messageSendToBridge)
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131 d.addErrback(lambda failure: failure.trap(exceptions.CancelError))
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132 return d.callback(mess_data)
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133
999
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134 def discoCallback(entities, to_jid_s):
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135 history_data = copy.deepcopy(mess_data)
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136 history_data['to'] = JID(to_jid_s)
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137 history_data['xml']['to'] = to_jid_s
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138 if entities:
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souliane <souliane@mailoo.org>
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139 if entities not in self.internal_data[timestamp]:
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140 sent_data = copy.deepcopy(mess_data)
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141 sent_data['to'] = JID(JID(to_jid_s).host)
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142 sent_data['xml']['to'] = JID(to_jid_s).host
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143 send(sent_data)
999
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144 self.internal_data[timestamp].append(entities)
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145 # we still need to fill the history and signal the echo...
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146 send(history_data, skip_send=True)
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147 else:
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148 # target server misses the addressing feature
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149 send(history_data)
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150
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151 def errback(failure, to_jid):
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152 discoCallback(None, to_jid)
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153
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154 timestamp = time()
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155 self.internal_data[timestamp] = []
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156 defer_list = []
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157 for type_, jid_ in entries:
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158 d = defer.Deferred()
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parents: 2145
diff changeset
159 d.addCallback(self.host.findFeaturesSet, client=client, jid_=JID(JID(jid_).host))
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160 d.addCallbacks(discoCallback, errback, callbackArgs=[jid_], errbackArgs=[jid_])
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161 d.callback([NS_ADDRESS])
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162 defer_list.append(d)
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163 d = defer.Deferred().addCallback(lambda dummy: self.internal_data.pop(timestamp))
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164 defer.DeferredList(defer_list).chainDeferred(d)
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165
1955
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166 def messageReceivedTrigger(self, client, message, post_treat):
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167 """In order to save the addressing information in the history"""
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168 def post_treat_addr(data, addresses):
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169 data['extra']['addresses'] = ""
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170 for address in addresses:
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171 # Depending how message has been constructed, we could get here
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172 # some noise like "\n " instead of an address element.
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diff changeset
173 if isinstance(address, domish.Element):
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174 data['extra']['addresses'] += '%s:%s\n' % (address['type'], address['jid'])
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175 return data
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176
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parents:
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177 try:
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178 addresses = message.elements(NS_ADDRESS, 'addresses').next()
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179 except StopIteration:
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180 pass # no addresses
1955
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diff changeset
181 else:
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diff changeset
182 post_treat.addCallback(post_treat_addr, addresses.children)
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183 return True
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184
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diff changeset
185 def getHandler(self, client):
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186 return XEP_0033_handler(self, client.profile)
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parents:
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187
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parents:
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188
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parents:
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189 class XEP_0033_handler(XMPPHandler):
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parents:
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190 implements(iwokkel.IDisco)
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191
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parents:
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192 def __init__(self, plugin_parent, profile):
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193 self.plugin_parent = plugin_parent
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194 self.host = plugin_parent.host
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195 self.profile = profile
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parents:
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196
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parents:
diff changeset
197 def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
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parents:
diff changeset
198 return [disco.DiscoFeature(NS_ADDRESS)]
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parents:
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199
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parents:
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200 def getDiscoItems(self, requestor, target, nodeIdentifier=''):
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parents:
diff changeset
201 return []