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annotate sat/plugins/plugin_xep_0359.py @ 3857:7d11e42b150e

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author Goffi <goffi@goffi.org>
date Thu, 14 Jul 2022 12:55:30 +0200
parents cc653b2685f0
children 8289ac1b34f4
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT plugin for Message Archive Management (XEP-0359)
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5 # Copyright (C) 2009-2021 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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12
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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 import uuid
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22 from zope.interface import implementer
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23 from twisted.words.protocols.jabber import xmlstream
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24 from wokkel import disco
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25 from sat.core.constants import Const as C
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26 from sat.core import exceptions
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27 from sat.core.i18n import _
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28 from sat.core.log import getLogger
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29
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30 log = getLogger(__name__)
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31
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32
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33 PLUGIN_INFO = {
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34 C.PI_NAME: "Unique and Stable Stanza IDs",
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35 C.PI_IMPORT_NAME: "XEP-0359",
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36 C.PI_TYPE: "XEP",
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37 C.PI_PROTOCOLS: ["XEP-0359"],
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38 C.PI_MAIN: "XEP_0359",
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39 C.PI_HANDLER: "yes",
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40 C.PI_DESCRIPTION: _("""Implementation of Unique and Stable Stanza IDs"""),
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41 }
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42
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43 NS_SID = "urn:xmpp:sid:0"
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45
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46 class XEP_0359(object):
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47
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48 def __init__(self, host):
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49 log.info(_("Unique and Stable Stanza IDs plugin initialization"))
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50 self.host = host
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51 host.registerNamespace("stanza_id", NS_SID)
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52 host.trigger.add("message_parse", self._message_parseTrigger)
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53 host.trigger.add("sendMessageData", self._sendMessageDataTrigger)
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54
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55 def _message_parseTrigger(self, client, message_elt, mess_data):
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56 """Check if message has a stanza-id"""
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57 stanza_id = self.getStanzaId(message_elt, client.jid.userhostJID())
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58 if stanza_id is not None:
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59 mess_data['extra']['stanza_id'] = stanza_id
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60 origin_id = self.getOriginId(message_elt)
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61 if origin_id is not None:
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62 mess_data['extra']['origin_id'] = origin_id
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63 return True
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64
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65 def _sendMessageDataTrigger(self, client, mess_data):
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66 origin_id = mess_data["extra"].get("origin_id")
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67 if not origin_id:
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68 origin_id = str(uuid.uuid4())
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69 mess_data["extra"]["origin_id"] = origin_id
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70 message_elt = mess_data["xml"]
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71 self.addOriginId(message_elt, origin_id)
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72
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73 def getStanzaId(self, element, by):
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74 """Return stanza-id if found in element
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75
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76 @param element(domish.Element): element to parse
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77 @param by(jid.JID): entity which should have set a stanza-id
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78 @return (unicode, None): stanza-id if found
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79 """
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80 stanza_id = None
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81 for stanza_elt in element.elements(NS_SID, "stanza-id"):
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82 if stanza_elt.getAttribute("by") == by.full():
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83 if stanza_id is not None:
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84 # we must not have more than one element (§3 #4)
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85 raise exceptions.DataError(
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86 "More than one corresponding stanza-id found!")
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87 stanza_id = stanza_elt.getAttribute("id")
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88 # we don't break to be sure that there is no more than one element
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89 # with this "by" attribute
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90
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91 return stanza_id
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92
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93 def addStanzaId(self, client, element, stanza_id, by=None):
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94 """Add a <stanza-id/> to a stanza
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95
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96 @param element(domish.Element): stanza where the <stanza-id/> must be added
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97 @param stanza_id(unicode): id to use
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98 @param by(jid.JID, None): jid to use or None to use client.jid
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99 """
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100 sid_elt = element.addElement((NS_SID, "stanza-id"))
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101 sid_elt["by"] = client.jid.userhost() if by is None else by.userhost()
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102 sid_elt["id"] = stanza_id
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103
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104 def getOriginId(self, element):
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105 """Return origin-id if found in element
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106
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107 @param element(domish.Element): element to parse
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108 @return (unicode, None): origin-id if found
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109 """
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110 try:
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111 origin_elt = next(element.elements(NS_SID, "origin-id"))
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112 except StopIteration:
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113 return None
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114 else:
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115 return origin_elt.getAttribute("id")
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116
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117 def addOriginId(self, element, origin_id=None):
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118 """Add a <origin-id/> to a stanza
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119
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120 @param element(domish.Element): stanza where the <origin-id/> must be added
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121 @param origin_id(str): id to use, None to automatically generate
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122 @return (str): origin_id
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123 """
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124 if origin_id is None:
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125 origin_id = str(uuid.uuid4())
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126 sid_elt = element.addElement((NS_SID, "origin-id"))
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127 sid_elt["id"] = origin_id
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128 return origin_id
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129
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130 def getHandler(self, client):
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131 return XEP_0359_handler()
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132
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133
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134 @implementer(disco.IDisco)
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135 class XEP_0359_handler(xmlstream.XMPPHandler):
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136
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137 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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138 return [disco.DiscoFeature(NS_SID)]
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139
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140 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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141 return []