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annotate sat/plugins/plugin_xep_0334.py @ 2622:8fb99ed47db4

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author Goffi <goffi@goffi.org>
date Wed, 27 Jun 2018 07:50:35 +0200
parents 26edcf3a30eb
children 56f94936df1e
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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 log = getLogger(__name__)
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24 from sat.core.constants import Const as C
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25
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26 from sat.tools.common import data_format
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28 from wokkel import disco, iwokkel
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29 try:
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30 from twisted.words.protocols.xmlstream import XMPPHandler
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31 except ImportError:
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32 from wokkel.subprotocols import XMPPHandler
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33 from zope.interface import implements
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34 from textwrap import dedent
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37 PLUGIN_INFO = {
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38 C.PI_NAME: u"Message Processing Hints",
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39 C.PI_IMPORT_NAME: u"XEP-0334",
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40 C.PI_TYPE: u"XEP",
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41 C.PI_PROTOCOLS: [u"XEP-0334"],
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42 C.PI_MAIN: "XEP_0334",
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43 C.PI_HANDLER: u"yes",
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44 C.PI_DESCRIPTION: D_(u"""Implementation of Message Processing Hints"""),
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45 C.PI_USAGE: dedent(D_(u"""\
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46 Frontends can use HINT_* constants in mess_data['extra'] in a serialized 'hints' dict.
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47 Internal plugins can use directly addHint([HINT_* constant]).
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48 Will set mess_data['extra']['history'] to 'skipped' when no store is requested and message is not saved in history."""))
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49
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50 }
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51
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52 NS_HINTS = u'urn:xmpp:hints'
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53
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54
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55 class XEP_0334(object):
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56 HINT_NO_PERMANENT_STORE = u'no-permanent-store'
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57 HINT_NO_STORE = u'no-store'
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58 HINT_NO_COPY = u'no-copy'
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59 HINT_STORE = u'store'
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60 HINTS = (HINT_NO_PERMANENT_STORE, HINT_NO_STORE, HINT_NO_COPY, HINT_STORE)
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61
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62 def __init__(self, host):
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63 log.info(_("Message Processing Hints plugin initialization"))
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64 self.host = host
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65 host.trigger.add("sendMessage", self.sendMessageTrigger)
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66 host.trigger.add("MessageReceived", self.messageReceivedTrigger, priority=-1000)
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67
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68 def getHandler(self, client):
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69 return XEP_0334_handler()
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70
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71 def addHint(self, mess_data, hint):
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72 if hint == self.HINT_NO_COPY and not mess_data['to'].resource:
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73 log.error(u"{hint} can only be used with full jids! Ignoring it.".format(hint=hint))
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74 return
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75 hints = mess_data.setdefault('hints', set())
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76 if hint in self.HINTS:
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77 hints.add(hint)
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78 else:
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79 log.error(u"Unknown hint: {}".format(hint))
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80
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81 def _sendPostXmlTreatment(self, mess_data):
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82 if 'hints' in mess_data:
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83 for hint in mess_data['hints']:
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84 mess_data[u'xml'].addElement((NS_HINTS, hint))
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85 return mess_data
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86
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87 def sendMessageTrigger(self, client, mess_data, pre_xml_treatments, post_xml_treatments):
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88 """Add the hints element to the message to be sent"""
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89 if u'hints' in mess_data[u'extra']:
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90 for hint in data_format.dict2iter(u'hints', mess_data[u'extra'], pop=True):
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91 self.addHint(hint)
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92
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93 post_xml_treatments.addCallback(self._sendPostXmlTreatment)
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94 return True
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95
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96 def _receivedSkipHistory(self, mess_data):
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97 mess_data[u'history'] = C.HISTORY_SKIP
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98 return mess_data
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99
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100 def messageReceivedTrigger(self, client, message_elt, post_treat):
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101 """Check for hints in the received message"""
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102 for elt in message_elt.elements():
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103 if elt.uri == NS_HINTS and elt.name in (self.HINT_NO_PERMANENT_STORE, self.HINT_NO_STORE):
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104 log.debug(u"history will be skipped for this message, as requested")
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105 post_treat.addCallback(self._receivedSkipHistory)
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106 break
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107 return True
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108
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109
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110 class XEP_0334_handler(XMPPHandler):
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111 implements(iwokkel.IDisco)
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112
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113 def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
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114 return [disco.DiscoFeature(NS_HINTS)]
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115
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116 def getDiscoItems(self, requestor, target, nodeIdentifier=''):
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117 return []