Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0376.py @ 4219:1b5cf2ee1d86

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plugin XEP-0384, XEP-0391: download missing devices list: when a peer jid was not in our roster, devices list was not retrieved, resulting in failed en/decryption. This patch does check it and download missing devices list in necessary. There is no subscription managed yet, so the list won't be updated in case of new devices, this should be addressed at some point.
author Goffi <goffi@goffi.org>
date Tue, 05 Mar 2024 17:31:36 +0100
parents 4b842c1fb686
children 0d7bb4df2343
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1 #!/usr/bin/env python3
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2
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3 # SàT plugin for XEP-0376
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4 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 from typing import Dict, List, Tuple, Optional, Any
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20 from zope.interface import implementer
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21 from twisted.words.protocols.jabber import jid
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22 from twisted.words.protocols.jabber.xmlstream import XMPPHandler
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23 from wokkel import disco, iwokkel, pubsub, data_form
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24 from libervia.backend.core.i18n import _
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25 from libervia.backend.core.constants import Const as C
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26 from libervia.backend.core import exceptions
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27 from libervia.backend.core.xmpp import SatXMPPEntity
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28 from libervia.backend.core.log import getLogger
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29
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30 log = getLogger(__name__)
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31
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32 PLUGIN_INFO = {
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33 C.PI_NAME: "Pubsub Account Management",
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34 C.PI_IMPORT_NAME: "XEP-0376",
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35 C.PI_TYPE: C.PLUG_TYPE_XEP,
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36 C.PI_MODES: C.PLUG_MODE_BOTH,
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37 C.PI_PROTOCOLS: ["XEP-0376"],
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38 C.PI_DEPENDENCIES: ["XEP-0060"],
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39 C.PI_MAIN: "XEP_0376",
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40 C.PI_HANDLER: "yes",
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41 C.PI_DESCRIPTION: _("""Pubsub Account Management"""),
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42 }
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43
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44 NS_PAM = "urn:xmpp:pam:0"
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45
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46
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47 class XEP_0376:
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48
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49 def __init__(self, host):
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50 log.info(_("Pubsub Account Management initialization"))
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51 self.host = host
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52 host.register_namespace("pam", NS_PAM)
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53 self._p = self.host.plugins["XEP-0060"]
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54 host.trigger.add("XEP-0060_subscribe", self.subscribe)
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55 host.trigger.add("XEP-0060_unsubscribe", self.unsubscribe)
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56 host.trigger.add("XEP-0060_subscriptions", self.subscriptions)
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57
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58 def get_handler(self, client):
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59 return XEP_0376_Handler()
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60
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61 async def profile_connected(self, client):
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62 if not self.host.hasFeature(client, NS_PAM):
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63 log.warning(
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64 "Your server doesn't support Pubsub Account Management, this is used to "
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65 "track all your subscriptions. You may ask your server administrator to "
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66 "install it."
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67 )
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68
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69 async def _sub_request(
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70 self,
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71 client: SatXMPPEntity,
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72 service: jid.JID,
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73 nodeIdentifier: str,
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74 sub_jid: Optional[jid.JID],
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75 options: Optional[dict],
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76 subscribe: bool
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77 ) -> None:
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78 if sub_jid is None:
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79 sub_jid = client.jid.userhostJID()
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80 iq_elt = client.IQ()
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81 pam_elt = iq_elt.addElement((NS_PAM, "pam"))
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82 pam_elt["jid"] = service.full()
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83 subscribe_elt = pam_elt.addElement(
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84 (pubsub.NS_PUBSUB, "subscribe" if subscribe else "unsubscribe")
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85 )
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86 subscribe_elt["node"] = nodeIdentifier
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87 subscribe_elt["jid"] = sub_jid.full()
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88 if options:
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89 options_elt = pam_elt.addElement((pubsub.NS_PUBSUB, "options"))
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90 options_elt["node"] = nodeIdentifier
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91 options_elt["jid"] = sub_jid.full()
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92 form = data_form.Form(
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93 formType='submit',
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94 formNamespace=pubsub.NS_PUBSUB_SUBSCRIBE_OPTIONS
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95 )
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96 form.makeFields(options)
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97 options_elt.addChild(form.toElement())
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98
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99 await iq_elt.send(client.server_jid.full())
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100
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101 async def subscribe(
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102 self,
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103 client: SatXMPPEntity,
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104 service: jid.JID,
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105 nodeIdentifier: str,
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106 sub_jid: Optional[jid.JID] = None,
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107 options: Optional[dict] = None
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108 ) -> Tuple[bool, Optional[pubsub.Subscription]]:
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109 if not self.host.hasFeature(client, NS_PAM) or client.is_component:
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110 return True, None
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111
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112 await self._sub_request(client, service, nodeIdentifier, sub_jid, options, True)
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113
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114 # TODO: actual result is sent with <message> stanza, we have to get and use them
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115 # to known the actual result. XEP-0376 returns an empty <iq> result, thus we don't
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116 # know here is the subscription actually succeeded
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117
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118 sub_id = None
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119 sub = pubsub.Subscription(nodeIdentifier, sub_jid, "subscribed", options, sub_id)
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120 return False, sub
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121
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122 async def unsubscribe(
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123 self,
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124 client: SatXMPPEntity,
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125 service: jid.JID,
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126 nodeIdentifier: str,
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127 sub_jid: Optional[jid.JID],
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128 subscriptionIdentifier: Optional[str],
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129 sender: Optional[jid.JID] = None,
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130 ) -> bool:
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131 if not self.host.hasFeature(client, NS_PAM) or client.is_component:
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132 return True
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133 await self._sub_request(client, service, nodeIdentifier, sub_jid, None, False)
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134 return False
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135
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136 async def subscriptions(
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137 self,
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138 client: SatXMPPEntity,
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139 service: Optional[jid.JID],
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140 node: str,
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141 ) -> Tuple[bool, Optional[List[Dict[str, Any]]]]:
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142 if not self.host.hasFeature(client, NS_PAM):
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143 return True, None
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144 if service is not None or node is not None:
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145 # if we have service and/or node subscriptions, it's a regular XEP-0060
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146 # subscriptions request
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147 return True, None
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148
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149 iq_elt = client.IQ("get")
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150 subscriptions_elt = iq_elt.addElement((NS_PAM, "subscriptions"))
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151 result_elt = await iq_elt.send()
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152 try:
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153 subscriptions_elt = next(result_elt.elements(NS_PAM, "subscriptions"))
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154 except StopIteration:
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155 raise ValueError(f"invalid PAM response: {result_elt.toXml()}")
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156 subs = []
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157 for subscription_elt in subscriptions_elt.elements(NS_PAM, "subscription"):
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158 sub = {}
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159 try:
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160 for attr, key in (
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161 ("service", "service"),
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162 ("node", "node"),
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163 ("jid", "subscriber"),
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164 ("subscription", "state")
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165 ):
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166 sub[key] = subscription_elt[attr]
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167 except KeyError as e:
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168 log.warning(
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169 f"Invalid <subscription> element (missing {e.args[0]!r} attribute): "
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170 f"{subscription_elt.toXml()}"
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171 )
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172 continue
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173 sub_id = subscription_elt.getAttribute("subid")
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174 if sub_id:
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175 sub["id"] = sub_id
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176 subs.append(sub)
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177
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178 return False, subs
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179
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180
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181 @implementer(iwokkel.IDisco)
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182 class XEP_0376_Handler(XMPPHandler):
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183
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184 def getDiscoInfo(self, requestor, service, nodeIdentifier=""):
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185 return [disco.DiscoFeature(NS_PAM)]
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186
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187 def getDiscoItems(self, requestor, service, nodeIdentifier=""):
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188 return []