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annotate sat/plugins/plugin_xep_0280.py @ 2656:8cacf7929f3c

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tools (common/data_format): added serialise and deserialise methods (using json for now)
author Goffi <goffi@goffi.org>
date Sat, 11 Aug 2018 18:24:55 +0200
parents 56f94936df1e
children 5060cbeec01e
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rev   line source
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for managing xep-0280
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5 # Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org)
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6
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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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11
ad88808591ef plugin XEP-0280: Message Carbons first draft
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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 _, D_
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21 from sat.core.log import getLogger
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22
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23 log = getLogger(__name__)
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24 from sat.core import exceptions
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25 from sat.core.constants import Const as C
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26 from sat.core.xmpp import SatMessageProtocol
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27 from twisted.words.protocols.jabber.error import StanzaError
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28 from twisted.internet import defer
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29 from wokkel import disco, iwokkel
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30 from zope.interface import implements
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31
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32 try:
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33 from twisted.words.protocols.xmlstream import XMPPHandler
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34 except ImportError:
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35 from wokkel.subprotocols import XMPPHandler
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36
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37
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38 PARAM_CATEGORY = "Misc"
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39 PARAM_NAME = "carbon"
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40 PARAM_LABEL = D_(u"Message carbons")
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41 NS_CARBONS = "urn:xmpp:carbons:2"
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42
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43 PLUGIN_INFO = {
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44 C.PI_NAME: u"XEP-0280 Plugin",
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45 C.PI_IMPORT_NAME: u"XEP-0280",
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46 C.PI_TYPE: u"XEP",
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47 C.PI_PROTOCOLS: [u"XEP-0280"],
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48 C.PI_DEPENDENCIES: [],
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49 C.PI_MAIN: u"XEP_0280",
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50 C.PI_HANDLER: u"yes",
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51 C.PI_DESCRIPTION: D_(u"""Implementation of Message Carbons"""),
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52 }
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53
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54
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55 class XEP_0280(object):
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56 #  TODO: param is only checked at profile connection
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57 # activate carbons on param change even after profile connection
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58 # TODO: chat state notifications are not handled yet (and potentially other XEPs?)
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59
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60 params = """
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61 <params>
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62 <individual>
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63 <category name="{category_name}" label="{category_label}">
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64 <param name="{param_name}" label="{param_label}" value="true" type="bool" security="0" />
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65 </category>
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66 </individual>
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67 </params>
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68 """.format(
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69 category_name=PARAM_CATEGORY,
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70 category_label=D_(PARAM_CATEGORY),
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71 param_name=PARAM_NAME,
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72 param_label=PARAM_LABEL,
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73 )
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74
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75 def __init__(self, host):
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76 log.info(_("Plugin XEP_0280 initialization"))
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77 self.host = host
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78 host.memory.updateParams(self.params)
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79 host.trigger.add("MessageReceived", self.messageReceivedTrigger, priority=1000)
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80
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81 def getHandler(self, client):
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82 return XEP_0280_handler()
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83
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84 def setPrivate(self, message_elt):
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85 """Add a <private/> element to a message
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86
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87 this method is intented to be called on final domish.Element by other plugins
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88 (in particular end 2 end encryption plugins)
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89 @param message_elt(domish.Element): <message> stanza
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90 """
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91 if message_elt.name != u"message":
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92 log.error(u"addPrivateElt must be used with <message> stanzas")
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93 return
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94 message_elt.addElement((NS_CARBONS, u"private"))
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95
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96 @defer.inlineCallbacks
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97 def profileConnected(self, client):
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98 """activate message carbons on connection if possible and activated in config"""
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99 activate = self.host.memory.getParamA(
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100 PARAM_NAME, PARAM_CATEGORY, profile_key=client.profile
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101 )
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102 if not activate:
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103 log.info(_(u"Not activating message carbons as requested in params"))
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104 return
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105 try:
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106 yield self.host.checkFeatures(client, (NS_CARBONS,))
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107 except exceptions.FeatureNotFound:
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108 log.warning(_(u"server doesn't handle message carbons"))
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109 else:
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110 log.info(_(u"message carbons available, enabling it"))
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111 iq_elt = client.IQ()
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112 iq_elt.addElement((NS_CARBONS, "enable"))
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113 try:
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114 yield iq_elt.send()
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115 except StanzaError as e:
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116 log.warning(u"Can't activate message carbons: {}".format(e))
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117 else:
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118 log.info(_(u"message carbons activated"))
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119
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120 def messageReceivedTrigger(self, client, message_elt, post_treat):
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121 """get message and handle it if carbons namespace is present"""
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122 carbons_elt = None
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123 for e in message_elt.elements():
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124 if e.uri == NS_CARBONS:
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125 carbons_elt = e
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126 break
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127
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128 if carbons_elt is None:
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129 # this is not a message carbons,
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130 # we continue normal behaviour
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131 return True
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132
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133 if message_elt["from"] != client.jid.userhost():
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134 log.warning(
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135 u"The message carbon received is not from our server, hack attempt?\n{xml}".format(
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136 xml=message_elt.toXml()
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137 )
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138 )
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139 return
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140 forwarded_elt = next(carbons_elt.elements(C.NS_FORWARD, "forwarded"))
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141 cc_message_elt = next(forwarded_elt.elements(C.NS_CLIENT, "message"))
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142 if carbons_elt.name == "received":
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143 # on receive we replace the wrapping message with the CCed one
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144 # and continue the normal behaviour
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145 message_elt["from"] = cc_message_elt["from"]
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146 del message_elt.children[:]
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147 for c in cc_message_elt.children:
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148 message_elt.addChild(c)
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149 return True
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150 elif carbons_elt.name == "sent":
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151 # on send we parse the message and just add it to history
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152 # and send it to frontends (without normal sending treatments)
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153 mess_data = SatMessageProtocol.parseMessage(cc_message_elt, client)
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154 if not mess_data["message"] and not mess_data["subject"]:
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155 return False
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156 client.messageAddToHistory(mess_data)
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157 client.messageSendToBridge(mess_data)
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158 else:
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159 log.warning(
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160 u"invalid message carbons received:\n{xml}".format(
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161 xml=message_elt.toXml()
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162 )
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163 )
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164 return False
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165
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166
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167 class XEP_0280_handler(XMPPHandler):
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168 implements(iwokkel.IDisco)
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169
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170 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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171 return [disco.DiscoFeature(NS_CARBONS)]
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172
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173 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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174 return []