Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0465.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 # Libervia plugin for XEP-0465
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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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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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19 from typing import Optional, List, Dict, Union
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21 from twisted.words.protocols.jabber.xmlstream import XMPPHandler
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22 from twisted.words.protocols.jabber import jid
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23 from twisted.words.protocols.jabber import error
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24 from twisted.words.xish import domish
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25 from zope.interface import implementer
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26 from wokkel import disco, iwokkel
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27
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28 from libervia.backend.core.constants import Const as C
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29 from libervia.backend.core.i18n import _
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30 from libervia.backend.core.log import getLogger
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31 from libervia.backend.core import exceptions
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32 from libervia.backend.core.core_types import SatXMPPEntity
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33 from libervia.backend.tools import utils
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34 from libervia.backend.tools.common import data_format
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35
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36 log = getLogger(__name__)
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37
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38 PLUGIN_INFO = {
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39 C.PI_NAME: "Pubsub Public Subscriptions",
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40 C.PI_IMPORT_NAME: "XEP-0465",
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41 C.PI_TYPE: C.PLUG_TYPE_XEP,
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42 C.PI_MODES: C.PLUG_MODE_BOTH,
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43 C.PI_PROTOCOLS: ["XEP-0465"],
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44 C.PI_DEPENDENCIES: ["XEP-0060", "XEP-0376"],
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45 C.PI_MAIN: "XEP_0465",
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46 C.PI_HANDLER: "yes",
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47 C.PI_DESCRIPTION: _("""Pubsub Public Subscriptions implementation"""),
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48 }
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49
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50 NS_PPS = "urn:xmpp:pps:0"
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51 NS_PPS_SUBSCRIPTIONS = "urn:xmpp:pps:subscriptions:0"
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52 NS_PPS_SUBSCRIBERS = "urn:xmpp:pps:subscribers:0"
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53 SUBSCRIBERS_NODE_PREFIX = f"{NS_PPS_SUBSCRIBERS}/"
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54 NOT_IMPLEMENTED_MSG = (
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55 "The service at {service!s} doesn't seem to support Pubsub Public Subscriptions "
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56 "(XEP-0465), please request support from your service administrator."
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57 )
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59
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60 class XEP_0465:
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61
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62 def __init__(self, host):
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63 log.info(_("Pubsub Public Subscriptions initialization"))
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64 host.register_namespace("pps", NS_PPS)
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65 self.host = host
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66 host.bridge.add_method(
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67 "ps_public_subscriptions_get",
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68 ".plugin",
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69 in_sign="sss",
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70 out_sign="s",
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71 method=self._subscriptions,
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72 async_=True,
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73 )
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74 host.bridge.add_method(
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75 "ps_public_subscriptions_get",
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76 ".plugin",
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77 in_sign="sss",
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78 out_sign="s",
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79 method=self._subscriptions,
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80 async_=True,
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81 )
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82 host.bridge.add_method(
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83 "ps_public_node_subscriptions_get",
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84 ".plugin",
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85 in_sign="sss",
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86 out_sign="a{ss}",
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87 method=self._get_public_node_subscriptions,
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88 async_=True,
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89 )
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90
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91 def get_handler(self, client):
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92 return XEP_0465_Handler()
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93
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94 @property
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95 def subscriptions_node(self) -> str:
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96 return NS_PPS_SUBSCRIPTIONS
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97
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98 @property
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99 def subscribers_node_prefix(self) -> str:
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100 return SUBSCRIBERS_NODE_PREFIX
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101
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102 def build_subscription_elt(self, node: str, service: jid.JID) -> domish.Element:
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103 """Generate a <subscriptions> element
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104
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105 This is the element that a service returns on public subscriptions request
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106 """
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107 subscription_elt = domish.Element((NS_PPS, "subscription"))
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108 subscription_elt["node"] = node
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109 subscription_elt["service"] = service.full()
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110 return subscription_elt
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111
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112 def build_subscriber_elt(self, subscriber: jid.JID) -> domish.Element:
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113 """Generate a <subscriber> element
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114
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115 This is the element that a service returns on node public subscriptions request
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116 """
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117 subscriber_elt = domish.Element((NS_PPS, "subscriber"))
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118 subscriber_elt["jid"] = subscriber.full()
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119 return subscriber_elt
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120
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121 @utils.ensure_deferred
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122 async def _subscriptions(
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123 self,
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124 service="",
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125 nodeIdentifier="",
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126 profile_key=C.PROF_KEY_NONE
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127 ) -> str:
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128 client = self.host.get_client(profile_key)
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129 service = None if not service else jid.JID(service)
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130 subs = await self.subscriptions(client, service, nodeIdentifier or None)
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131 return data_format.serialise(subs)
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132
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133 async def subscriptions(
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134 self,
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135 client: SatXMPPEntity,
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136 service: Optional[jid.JID] = None,
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137 node: Optional[str] = None
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138 ) -> List[Dict[str, Union[str, bool]]]:
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139 """Retrieve public subscriptions from a service
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140
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141 @param service(jid.JID): PubSub service
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142 @param nodeIdentifier(unicode, None): node to filter
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143 None to get all subscriptions
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144 """
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145 if service is None:
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146 service = client.jid.userhostJID()
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147 try:
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148 items, __ = await self.host.plugins["XEP-0060"].get_items(
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149 client, service, NS_PPS_SUBSCRIPTIONS
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150 )
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151 except error.StanzaError as e:
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152 if e.condition == "forbidden":
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153 log.warning(NOT_IMPLEMENTED_MSG.format(service=service))
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154 return []
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155 else:
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156 raise e
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157 ret = []
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158 for item in items:
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159 try:
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160 subscription_elt = next(item.elements(NS_PPS, "subscription"))
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161 except StopIteration:
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162 log.warning(f"no <subscription> element found: {item.toXml()}")
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163 continue
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164
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165 try:
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166 sub_dict = {
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167 "service": subscription_elt["service"],
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168 "node": subscription_elt["node"],
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169 "subscriber": service.full(),
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170 "state": subscription_elt.getAttribute("subscription", "subscribed"),
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171 }
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172 except KeyError:
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173 log.warning(
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174 f"invalid <subscription> element: {subscription_elt.toXml()}"
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175 )
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176 continue
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177 if node is not None and sub_dict["node"] != node:
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178 # if not is specified, we filter out any other node
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179 # FIXME: should node filtering be done by server?
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180 continue
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181 ret.append(sub_dict)
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182 return ret
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183
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184 @utils.ensure_deferred
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185 async def _get_public_node_subscriptions(
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186 self,
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187 service: str,
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188 node: str,
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189 profile_key: str
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190 ) -> Dict[str, str]:
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191 client = self.host.get_client(profile_key)
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192 subs = await self.get_public_node_subscriptions(
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193 client, jid.JID(service) if service else None, node
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194 )
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195 return {j.full(): a for j, a in subs.items()}
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196
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197 def get_public_subscribers_node(self, node: str) -> str:
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198 """Return prefixed node to retrieve public subscribers"""
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199 return f"{NS_PPS_SUBSCRIBERS}/{node}"
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200
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201 async def get_public_node_subscriptions(
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202 self,
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203 client: SatXMPPEntity,
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204 service: Optional[jid.JID],
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205 nodeIdentifier: str
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206 ) -> Dict[jid.JID, str]:
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207 """Retrieve public subscriptions to a node
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208
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209 @param nodeIdentifier(unicode): node to get subscriptions from
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210 """
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211 if not nodeIdentifier:
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212 raise exceptions.DataError("node identifier can't be empty")
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213
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214 if service is None:
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215 service = client.jid.userhostJID()
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216
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217 subscribers_node = self.get_public_subscribers_node(nodeIdentifier)
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218
4008
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219 try:
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parents: 4008
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220 items, __ = await self.host.plugins["XEP-0060"].get_items(
4008
56e5b18f4d06 plugin XEP-0465: log a warning and return empty list/dict when `forbidden` error is received:
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parents: 3758
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221 client, service, subscribers_node
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parents: 3758
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222 )
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parents: 3758
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223 except error.StanzaError as e:
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parents: 3758
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224 if e.condition == "forbidden":
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225 log.warning(NOT_IMPLEMENTED_MSG.format(service=service))
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226 return {}
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parents: 3758
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227 else:
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228 raise e
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229 ret = {}
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230 for item in items:
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parents:
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231 try:
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232 subscriber_elt = next(item.elements(NS_PPS, "subscriber"))
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233 except StopIteration:
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234 log.warning(f"no <subscriber> element found: {item.toXml()}")
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parents:
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235 continue
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Goffi <goffi@goffi.org>
parents:
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236
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parents:
diff changeset
237 try:
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Goffi <goffi@goffi.org>
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238 ret[jid.JID(subscriber_elt["jid"])] = "subscribed"
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Goffi <goffi@goffi.org>
parents:
diff changeset
239 except (KeyError, RuntimeError):
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Goffi <goffi@goffi.org>
parents:
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240 log.warning(
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241 f"invalid <subscriber> element: {subscriber_elt.toXml()}"
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Goffi <goffi@goffi.org>
parents:
diff changeset
242 )
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Goffi <goffi@goffi.org>
parents:
diff changeset
243 continue
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Goffi <goffi@goffi.org>
parents:
diff changeset
244 return ret
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Goffi <goffi@goffi.org>
parents:
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245
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diff changeset
246 def set_public_opt(self, options: Optional[dict] = None) -> dict:
3758
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247 """Set option to make a subscription public
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248
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249 @param options: dict where the option must be set
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parents:
diff changeset
250 if None, a new dict will be created
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parents:
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251
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252 @return: the options dict
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parents:
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253 """
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parents:
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254 if options is None:
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parents:
diff changeset
255 options = {}
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parents:
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256 options[f'{{{NS_PPS}}}public'] = True
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parents:
diff changeset
257 return options
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parents:
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258
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parents:
diff changeset
259
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parents:
diff changeset
260 @implementer(iwokkel.IDisco)
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parents:
diff changeset
261 class XEP_0465_Handler(XMPPHandler):
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parents:
diff changeset
262
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Goffi <goffi@goffi.org>
parents:
diff changeset
263 def getDiscoInfo(self, requestor, service, nodeIdentifier=""):
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parents:
diff changeset
264 return [disco.DiscoFeature(NS_PPS)]
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parents:
diff changeset
265
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parents:
diff changeset
266 def getDiscoItems(self, requestor, service, nodeIdentifier=""):
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parents:
diff changeset
267 return []