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annotate src/plugins/plugin_xep_0033.py @ 750:c8b9f675ac17

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plugin XEP-0033: avoid the controlled error to explode (use return Failure(...) instead of raise)
author souliane <souliane@mailoo.org>
date Mon, 16 Dec 2013 17:49:54 +0100
parents 192b804ee446
children bfabeedbf32e
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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 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 import logging
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21 from sat.core import exceptions
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22 from wokkel import disco, iwokkel
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23 from zope.interface import implements
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24 from twisted.words.protocols.jabber.jid import JID
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25 from twisted.python.failure import Failure
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26 import copy
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27 try:
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28 from twisted.words.protocols.xmlstream import XMPPHandler
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29 except ImportError:
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30 from wokkel.subprotocols import XMPPHandler
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31 from threading import Timer
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32 from twisted.words.xish import domish
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33 from twisted.internet import defer, threads
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34
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35 from sat.core.sat_main import MessageSentAndStored, AbortSendMessage
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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 logging.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, 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(entity):
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86 if entity is None:
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87 return Failure(AbortSendMessage(_("XEP-0033 is being used but the server doesn't support it!")))
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88 to = JID(mess_data["to"].host)
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89 if to != entity:
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90 logging.warning(_("Stanzas using XEP-0033 should be addressed to %s, not %s!") % (entity, to))
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91 logging.warning(_("TODO: addressing has be fixed by the backend... fix it in the frontend!"))
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92 mess_data["to"] = entity
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93 element = mess_data['xml'].addElement('addresses', NS_ADDRESS)
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94 entries = [entry.split(':') for entry in mess_data['extra']['address'].split('\n') if entry != '']
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95 for type_, jid_ in entries:
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96 element.addChild(domish.Element((None, 'address'), None, {'type': type_, 'jid': jid_}))
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97 # when the prosody plugin is completed, we can immediately return mess_data from here
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98 self.sendAndStoreMessage(mess_data, entries, profile)
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99 return Failure(MessageSentAndStored("XEP-0033 took over"))
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100 d = self.host.requestServerDisco(NS_ADDRESS, profile_key=profile)
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101 d.addCallbacks(discoCallback, lambda dummy: discoCallback(None))
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102 return d
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103
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104 treatments.addCallback(treatment)
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105 return True
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106
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107 def sendAndStoreMessage(self, mess_data, entries, profile):
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108 """Check if target servers support XEP-0033, send and store the messages
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109 @return: a friendly failure to let the core know that we sent the message already
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110
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111 Later we should be able to remove this method because:
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112 # XXX: sending the messages should be done by the local server
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113 # FIXME: for now we duplicate the messages in the history for each recipient, this should change
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114 # FIXME: for now we duplicate the echoes to the sender, this should also change
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115 Ideas:
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116 - fix Prosody plugin to check if target server support the feature
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117 - redesign the database to save only one entry to the database
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118 - change the newMessage signal to eventually pass more than one recipient
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119 """
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120 def discoCallback(entity, to_jid):
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121 new_data = copy.deepcopy(mess_data)
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122 new_data['to'] = JID(to_jid)
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123 new_data['xml']['to'] = to_jid
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124 if entity:
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125 if entity not in self.internal_data[timestamp]:
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126 self.host.sendAndStoreMessage(mess_data, False, profile)
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127 self.internal_data[timestamp].append(entity)
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128 # we still need to fill the history and signal the echo...
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129 self.host.sendAndStoreMessage(new_data, True, profile)
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130 else:
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131 # target server misses the addressing feature
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132 self.host.sendAndStoreMessage(new_data, False, profile)
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133
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134 def errback(failure, to_jid):
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135 discoCallback(None, to_jid)
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136
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137 timestamp = time()
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138 self.internal_data[timestamp] = []
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139 defer_list = []
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140 for type_, jid_ in entries:
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141 d = defer.Deferred()
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142 d.addCallback(self.host.requestServerDisco, JID(JID(jid_).host), profile_key=profile)
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143 d.addCallbacks(discoCallback, errback, callbackArgs=[jid_], errbackArgs=[jid_])
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144 d.callback(NS_ADDRESS)
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145 defer_list.append(d)
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146 d = defer.Deferred().addCallback(lambda dummy: self.internal_data.pop(timestamp))
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147 defer.DeferredList(defer_list).chainDeferred(d)
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148
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149 def messageReceivedTrigger(self, message, post_treat, profile):
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150 """In order to save the addressing information in the history"""
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151 def post_treat_addr(data, addresses):
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152 data['extra']['addresses'] = ""
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153 for address in addresses:
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154 data['extra']['addresses'] += '%s:%s\n' % (address['type'], address['jid'])
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155 return data
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156
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157 try:
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158 addresses = message.elements(NS_ADDRESS, 'addresses').next()
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159 post_treat.addCallback(post_treat_addr, addresses.children)
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160 except StopIteration:
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161 pass # no addresses
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162 return True
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163
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164 def getHandler(self, profile):
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165 return XEP_0033_handler(self, profile)
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166
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167
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168 class XEP_0033_handler(XMPPHandler):
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169 implements(iwokkel.IDisco)
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170
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171 def __init__(self, plugin_parent, profile):
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172 self.plugin_parent = plugin_parent
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173 self.host = plugin_parent.host
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174 self.profile = profile
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175
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176 def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
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177 return [disco.DiscoFeature(NS_ADDRESS)]
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178
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179 def getDiscoItems(self, requestor, target, nodeIdentifier=''):
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180 return []