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annotate sat/plugins/plugin_xep_0334.py @ 2624:56f94936df1e

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author Goffi <goffi@goffi.org>
date Wed, 27 Jun 2018 20:14:46 +0200
parents 26edcf3a30eb
children baccc27d5c5c
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rev   line source
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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38
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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 []