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annotate src/plugins/plugin_xep_0033.py @ 1144:2481fa96ac1c

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plugin OTR: added ability to drop private key
author Goffi <goffi@goffi.org>
date Wed, 27 Aug 2014 01:27:24 +0200
parents e88bff4c8b77
children 3e234902177a
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1 #!/usr/bin/python
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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, 2014 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.misc import TriggerManager
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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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48
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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("sendMessage", self.sendMessageTrigger, 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 sendMessageTrigger(self, mess_data, pre_xml_treatments, post_xml_treatments, profile):
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79 """Process the XEP-0033 related data to be sent"""
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80
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81 def treatment(mess_data):
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82 if not 'address' in mess_data['extra']:
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83 return mess_data
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84
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85 def discoCallback(entities):
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86 if not entities:
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87 log.warning(_("XEP-0033 is being used but the server doesn't support it!"))
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88 raise failure.Failure(exceptions.CancelError())
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89 if mess_data["to"] not in entities:
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90 expected = _(' or ').join([entity.userhost() for entity in entities])
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91 log.warning(_("Stanzas using XEP-0033 should be addressed to %(expected)s, not %(current)s!") % {'expected': expected, 'current': mess_data["to"]})
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92 log.warning(_("TODO: addressing has been fixed by the backend... fix it in the frontend!"))
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93 mess_data["to"] = list(entities)[0].userhostJID()
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94 element = mess_data['xml'].addElement('addresses', NS_ADDRESS)
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95 entries = [entry.split(':') for entry in mess_data['extra']['address'].split('\n') if entry != '']
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96 for type_, jid_ in entries:
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97 element.addChild(domish.Element((None, 'address'), None, {'type': type_, 'jid': jid_}))
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98 # when the prosody plugin is completed, we can immediately return mess_data from here
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99 self.sendAndStoreMessage(mess_data, entries, profile)
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100 log.debug("XEP-0033 took over")
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101 raise failure.Failure(exceptions.CancelError())
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102 d = self.host.findFeaturesSet([NS_ADDRESS], profile_key=profile)
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103 d.addCallbacks(discoCallback, lambda dummy: discoCallback(None))
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104 return d
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105
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106 post_xml_treatments.addCallback(treatment)
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107 return True
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108
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109 def sendAndStoreMessage(self, mess_data, entries, profile):
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110 """Check if target servers support XEP-0033, send and store the messages
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111 @return: a friendly failure to let the core know that we sent the message already
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112
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113 Later we should be able to remove this method because:
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114 # XXX: sending the messages should be done by the local server
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115 # FIXME: for now we duplicate the messages in the history for each recipient, this should change
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116 # FIXME: for now we duplicate the echoes to the sender, this should also change
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117 Ideas:
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118 - fix Prosody plugin to check if target server support the feature
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119 - redesign the database to save only one entry to the database
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120 - change the newMessage signal to eventually pass more than one recipient
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121 """
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122 def discoCallback(entities, to_jid_s):
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123 history_data = copy.deepcopy(mess_data)
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124 history_data['to'] = JID(to_jid_s)
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125 history_data['xml']['to'] = to_jid_s
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126 if entities:
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127 if entities not in self.internal_data[timestamp]:
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128 sent_data = copy.deepcopy(mess_data)
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129 sent_data['to'] = JID(JID(to_jid_s).host)
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130 sent_data['xml']['to'] = JID(to_jid_s).host
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131 self.host.sendAndStoreMessage(sent_data, False, profile)
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132 self.internal_data[timestamp].append(entities)
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133 # we still need to fill the history and signal the echo...
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134 self.host.sendAndStoreMessage(history_data, True, profile)
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135 else:
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136 # target server misses the addressing feature
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137 self.host.sendAndStoreMessage(history_data, False, profile)
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138
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139 def errback(failure, to_jid):
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140 discoCallback(None, to_jid)
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141
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142 timestamp = time()
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143 self.internal_data[timestamp] = []
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144 defer_list = []
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145 for type_, jid_ in entries:
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146 d = defer.Deferred()
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147 d.addCallback(self.host.findFeaturesSet, jid_=JID(JID(jid_).host), profile_key=profile)
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148 d.addCallbacks(discoCallback, errback, callbackArgs=[jid_], errbackArgs=[jid_])
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149 d.callback([NS_ADDRESS])
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150 defer_list.append(d)
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151 d = defer.Deferred().addCallback(lambda dummy: self.internal_data.pop(timestamp))
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152 defer.DeferredList(defer_list).chainDeferred(d)
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153
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154 def messageReceivedTrigger(self, message, post_treat, profile):
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155 """In order to save the addressing information in the history"""
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156 def post_treat_addr(data, addresses):
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157 data['extra']['addresses'] = ""
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158 for address in addresses:
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159 # Depending how message has been constructed, we could get here
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160 # some noise like "\n " instead of an address element.
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161 if isinstance(address, domish.Element):
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162 data['extra']['addresses'] += '%s:%s\n' % (address['type'], address['jid'])
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163 return data
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164
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165 try:
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166 addresses = message.elements(NS_ADDRESS, 'addresses').next()
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167 post_treat.addCallback(post_treat_addr, addresses.children)
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168 except StopIteration:
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169 pass # no addresses
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170 return True
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171
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172 def getHandler(self, profile):
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173 return XEP_0033_handler(self, profile)
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174
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175
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176 class XEP_0033_handler(XMPPHandler):
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177 implements(iwokkel.IDisco)
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178
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179 def __init__(self, plugin_parent, profile):
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180 self.plugin_parent = plugin_parent
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181 self.host = plugin_parent.host
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182 self.profile = profile
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183
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184 def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
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185 return [disco.DiscoFeature(NS_ADDRESS)]
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186
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187 def getDiscoItems(self, requestor, target, nodeIdentifier=''):
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188 return []