Mercurial > libervia-backend

annotate sat/plugins/plugin_xep_0115.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 be6d91572633
children 524856bd7b19
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1 #!/usr/bin/env python3
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2
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4 # SAT plugin for managing xep-0115
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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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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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 from sat.core.i18n import _
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21 from sat.core.constants import Const as C
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22 from sat.core.log import getLogger
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23
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24 log = getLogger(__name__)
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25 from twisted.words.xish import domish
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26 from twisted.words.protocols.jabber import jid
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27 from twisted.internet import defer, error
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28 from zope.interface import implementer
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29 from wokkel import disco, iwokkel
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31 try:
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32 from twisted.words.protocols.xmlstream import XMPPHandler
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33 except ImportError:
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34 from wokkel.subprotocols import XMPPHandler
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35
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36 PRESENCE = "/presence"
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37 NS_ENTITY_CAPABILITY = "http://jabber.org/protocol/caps"
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38 NS_CAPS_OPTIMIZE = "http://jabber.org/protocol/caps#optimize"
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39 CAPABILITY_UPDATE = PRESENCE + '/c[@xmlns="' + NS_ENTITY_CAPABILITY + '"]'
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41 PLUGIN_INFO = {
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42 C.PI_NAME: "XEP 0115 Plugin",
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43 C.PI_IMPORT_NAME: "XEP-0115",
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44 C.PI_TYPE: "XEP",
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45 C.PI_MODES: C.PLUG_MODE_BOTH,
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46 C.PI_PROTOCOLS: ["XEP-0115"],
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47 C.PI_DEPENDENCIES: [],
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48 C.PI_MAIN: "XEP_0115",
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49 C.PI_HANDLER: "yes",
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50 C.PI_DESCRIPTION: _("""Implementation of entity capabilities"""),
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51 }
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53
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54 class XEP_0115(object):
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55 cap_hash = None # capabilities hash is class variable as it is common to all profiles
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57 def __init__(self, host):
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58 log.info(_("Plugin XEP_0115 initialization"))
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59 self.host = host
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60 host.trigger.add("Presence send", self._presenceTrigger)
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61
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62 def getHandler(self, client):
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63 return XEP_0115_handler(self)
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64
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65 @defer.inlineCallbacks
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66 def _prepareCaps(self, client):
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67 # we have to calculate hash for client
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68 # because disco infos/identities may change between clients
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69
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70 # optimize check
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71 client._caps_optimize = yield self.host.hasFeature(client, NS_CAPS_OPTIMIZE)
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72 if client._caps_optimize:
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73 log.info(_("Caps optimisation enabled"))
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74 client._caps_sent = False
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75 else:
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76 log.warning(_("Caps optimisation not available"))
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77
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78 # hash generation
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79 _infos = yield client.discoHandler.info(client.jid, client.jid, "")
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80 disco_infos = disco.DiscoInfo()
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81 for item in _infos:
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82 disco_infos.append(item)
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83 cap_hash = client._caps_hash = self.host.memory.disco.generateHash(disco_infos)
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84 log.info(
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85 "Our capability hash has been generated: [{cap_hash}]".format(
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86 cap_hash=cap_hash
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87 )
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88 )
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89 log.debug("Generating capability domish.Element")
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90 c_elt = domish.Element((NS_ENTITY_CAPABILITY, "c"))
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91 c_elt["hash"] = "sha-1"
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92 c_elt["node"] = C.APP_URL
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93 c_elt["ver"] = cap_hash
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94 client._caps_elt = c_elt
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95 if client._caps_optimize:
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96 client._caps_sent = False
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97 if cap_hash not in self.host.memory.disco.hashes:
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98 self.host.memory.disco.hashes[cap_hash] = disco_infos
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99 self.host.memory.updateEntityData(
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100 client, client.jid, C.ENTITY_CAP_HASH, cap_hash
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101 )
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102
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103 def _presenceAddElt(self, client, obj):
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104 if client._caps_optimize:
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105 if client._caps_sent:
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106 return
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107 client.caps_sent = True
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108 obj.addChild(client._caps_elt)
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109
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110 def _presenceTrigger(self, client, obj, presence_d):
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111 if not hasattr(client, "_caps_optimize"):
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112 presence_d.addCallback(lambda __: self._prepareCaps(client))
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113
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114 presence_d.addCallback(lambda __: self._presenceAddElt(client, obj))
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115 return True
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116
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117
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118 @implementer(iwokkel.IDisco)
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119 class XEP_0115_handler(XMPPHandler):
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120
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121 def __init__(self, plugin_parent):
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122 self.plugin_parent = plugin_parent
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123 self.host = plugin_parent.host
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124
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125 @property
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126 def client(self):
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127 return self.parent
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128
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129 def connectionInitialized(self):
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130 self.xmlstream.addObserver(CAPABILITY_UPDATE, self.update)
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131
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132 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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133 return [
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134 disco.DiscoFeature(NS_ENTITY_CAPABILITY),
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135 disco.DiscoFeature(NS_CAPS_OPTIMIZE),
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136 ]
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137
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138 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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139 return []
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140
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141 def update(self, presence):
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142 """
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143 Manage the capabilities of the entity
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144
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145 Check if we know the version of this capabilities and get the capabilities if necessary
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146 """
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147 from_jid = jid.JID(presence["from"])
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148 c_elem = next(presence.elements(NS_ENTITY_CAPABILITY, "c"))
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149 try:
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150 c_ver = c_elem["ver"]
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151 c_hash = c_elem["hash"]
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152 c_node = c_elem["node"]
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153 except KeyError:
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154 log.warning(_("Received invalid capabilities tag: %s") % c_elem.toXml())
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155 return
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156
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157 if c_ver in self.host.memory.disco.hashes:
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158 # we already know the hash, we update the jid entity
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159 log.debug(
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160 "hash [%(hash)s] already in cache, updating entity [%(jid)s]"
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161 % {"hash": c_ver, "jid": from_jid.full()}
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162 )
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163 self.host.memory.updateEntityData(
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164 self.client, from_jid, C.ENTITY_CAP_HASH, c_ver
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165 )
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166 return
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167
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168 if c_hash != "sha-1": # unknown hash method
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169 log.warning(
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170 _(
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171 "Unknown hash method for entity capabilities: [{hash_method}] "
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172 "(entity: {entity_jid}, node: {node})"
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173 )
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174 .format(hash_method = c_hash, entity_jid = from_jid, node = c_node)
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175 )
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176
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177 def cb(__):
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178 computed_hash = self.host.memory.getEntityDatum(
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179 self.client, from_jid, C.ENTITY_CAP_HASH
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180 )
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181 if computed_hash != c_ver:
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182 log.warning(
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183 _(
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184 "Computed hash differ from given hash:\n"
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185 "given: [{given}]\n"
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186 "computed: [{computed}]\n"
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187 "(entity: {entity_jid}, node: {node})"
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188 ).format(
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189 given = c_ver,
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190 computed = computed_hash,
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191 entity_jid = from_jid,
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diff changeset
192 node = c_node,
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193 )
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194 )
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195
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196 def eb(failure):
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197 if isinstance(failure.value, error.ConnectionDone):
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198 return
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199 msg = (
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200 failure.value.condition
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201 if hasattr(failure.value, "condition")
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202 else failure.getErrorMessage()
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203 )
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204 log.error(
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diff changeset
205 _("Couldn't retrieve disco info for {jid}: {error}").format(
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206 jid=from_jid.full(), error=msg
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207 )
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parents: 2587
diff changeset
208 )
1244
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souliane <souliane@mailoo.org>
parents: 1232
diff changeset
209
2148
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Goffi <goffi@goffi.org>
parents: 2145
diff changeset
210 d = self.host.getDiscoInfos(self.parent, from_jid)
1244
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souliane <souliane@mailoo.org>
parents: 1232
diff changeset
211 d.addCallbacks(cb, eb)
944
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parents: 941
diff changeset
212 # TODO: me must manage the full algorithm described at XEP-0115 #5.4 part 3