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annotate sat/plugins/plugin_xep_0334.py @ 2646:712cb4ff3e13

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core: new EncryptionHandler class which manage encrypted session as a core feature: Plugin handling encryption can now register using host.registerEncryptionPlugin, and an encryption session can now be started using messageEncryptionStart bridge method. This will make encryption handling more easy, as we now know if a session is clear or e2e encrypted, and which plugin handle it.
author Goffi <goffi@goffi.org>
date Sun, 29 Jul 2018 19:22:56 +0200
parents 56f94936df1e
children baccc27d5c5c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1934
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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 Delayed Delivery (XEP-0334)
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5 # Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org)
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6 # Copyright (C) 2013-2016 Adrien Cossa (souliane@mailoo.org)
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7
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8 # This program is free software: you can redistribute it and/or modify
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9 # it under the terms of the GNU Affero General Public License as published by
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10 # the Free Software Foundation, either version 3 of the License, or
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11 # (at your option) any later version.
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13 # This program is distributed in the hope that it will be useful,
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14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 # GNU Affero General Public License for more details.
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17
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18 # You should have received a copy of the GNU Affero General Public License
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19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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20
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21 from sat.core.i18n import _, D_
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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 sat.core.constants import Const as C
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26
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27 from sat.tools.common import data_format
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29 from wokkel import disco, iwokkel
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30
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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 from zope.interface import implements
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36 from textwrap import dedent
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39 PLUGIN_INFO = {
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40 C.PI_NAME: u"Message Processing Hints",
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41 C.PI_IMPORT_NAME: u"XEP-0334",
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42 C.PI_TYPE: u"XEP",
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43 C.PI_PROTOCOLS: [u"XEP-0334"],
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44 C.PI_MAIN: "XEP_0334",
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45 C.PI_HANDLER: u"yes",
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46 C.PI_DESCRIPTION: D_(u"""Implementation of Message Processing Hints"""),
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47 C.PI_USAGE: dedent(
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48 D_(
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49 u"""\
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50 Frontends can use HINT_* constants in mess_data['extra'] in a serialized 'hints' dict.
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51 Internal plugins can use directly addHint([HINT_* constant]).
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52 Will set mess_data['extra']['history'] to 'skipped' when no store is requested and message is not saved in history."""
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53 )
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54 ),
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55 }
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56
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57 NS_HINTS = u"urn:xmpp:hints"
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58
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59
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60 class XEP_0334(object):
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61 HINT_NO_PERMANENT_STORE = u"no-permanent-store"
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62 HINT_NO_STORE = u"no-store"
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63 HINT_NO_COPY = u"no-copy"
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64 HINT_STORE = u"store"
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65 HINTS = (HINT_NO_PERMANENT_STORE, HINT_NO_STORE, HINT_NO_COPY, HINT_STORE)
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66
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67 def __init__(self, host):
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68 log.info(_("Message Processing Hints plugin initialization"))
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69 self.host = host
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70 host.trigger.add("sendMessage", self.sendMessageTrigger)
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71 host.trigger.add("MessageReceived", self.messageReceivedTrigger, priority=-1000)
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72
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73 def getHandler(self, client):
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74 return XEP_0334_handler()
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75
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76 def addHint(self, mess_data, hint):
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77 if hint == self.HINT_NO_COPY and not mess_data["to"].resource:
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78 log.error(
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79 u"{hint} can only be used with full jids! Ignoring it.".format(hint=hint)
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80 )
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81 return
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82 hints = mess_data.setdefault("hints", set())
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83 if hint in self.HINTS:
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84 hints.add(hint)
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85 else:
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86 log.error(u"Unknown hint: {}".format(hint))
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87
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88 def _sendPostXmlTreatment(self, mess_data):
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89 if "hints" in mess_data:
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90 for hint in mess_data["hints"]:
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91 mess_data[u"xml"].addElement((NS_HINTS, hint))
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92 return mess_data
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93
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94 def sendMessageTrigger(
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95 self, client, mess_data, pre_xml_treatments, post_xml_treatments
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96 ):
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97 """Add the hints element to the message to be sent"""
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98 if u"hints" in mess_data[u"extra"]:
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99 for hint in data_format.dict2iter(u"hints", mess_data[u"extra"], pop=True):
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100 self.addHint(hint)
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101
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102 post_xml_treatments.addCallback(self._sendPostXmlTreatment)
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103 return True
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104
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105 def _receivedSkipHistory(self, mess_data):
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106 mess_data[u"history"] = C.HISTORY_SKIP
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107 return mess_data
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108
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109 def messageReceivedTrigger(self, client, message_elt, post_treat):
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110 """Check for hints in the received message"""
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111 for elt in message_elt.elements():
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112 if elt.uri == NS_HINTS and elt.name in (
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113 self.HINT_NO_PERMANENT_STORE,
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114 self.HINT_NO_STORE,
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115 ):
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116 log.debug(u"history will be skipped for this message, as requested")
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117 post_treat.addCallback(self._receivedSkipHistory)
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118 break
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119 return True
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120
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121
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122 class XEP_0334_handler(XMPPHandler):
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123 implements(iwokkel.IDisco)
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124
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125 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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126 return [disco.DiscoFeature(NS_HINTS)]
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127
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128 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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129 return []