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annotate sat/plugins/plugin_xep_0376.py @ 4002:5245b675f7ad

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plugin XEP-0313: don't wait for MAM to be retrieved in connection workflow: MAM retrieval can be long, and can be done after connection, message just need to be sorted when being inserted (i.e. frontends must do insort). To avoid blocking connection for too long and result in bad UX and timeout risk, one2one MAM message are not retrieved in background.
author Goffi <goffi@goffi.org>
date Fri, 10 Mar 2023 17:22:45 +0100
parents b7cef1b24f83
children 524856bd7b19
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3758
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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 sat.core.i18n import _
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25 from sat.core.constants import Const as C
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26 from sat.core import exceptions
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27 from sat.core.xmpp import SatXMPPEntity
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28 from sat.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.registerNamespace("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 getHandler(self, client):
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59 return XEP_0376_Handler()
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60
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61 async def profileConnected(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 _subRequest(
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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._subRequest(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._subRequest(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 []