Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0376.py @ 4230:314d3c02bb67

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core (xmpp): Add a timeout for messages processing to avoid blocking the queue.
author Goffi <goffi@goffi.org>
date Sat, 06 Apr 2024 12:21:04 +0200
parents 4b842c1fb686
children 0d7bb4df2343
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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)
3758
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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 []