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annotate libervia/backend/plugins/plugin_xep_0359.py @ 4094:c3b68fdc2de7

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component AP gateway: fix handling of XMPP comments authors: the gateway was supposing that comments where emitted from PEP of author. While this is the case for most blog posts, it's not for comments. Instead the component is now using `author_jid` which is retrieved by XEP-0277 plugin, and reject the item if the auhor is not verified (i.e. if `publisher` attribute is not set by XMPP service).
author Goffi <goffi@goffi.org>
date Mon, 12 Jun 2023 14:50:43 +0200
parents 4b842c1fb686
children 2729d424dee7
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rev   line source
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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 from typing import Optional
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22 import uuid
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23 from zope.interface import implementer
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24 from twisted.words.protocols.jabber import xmlstream
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25 from wokkel import disco
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26 from libervia.backend.core.constants import Const as C
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27 from libervia.backend.core import exceptions
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28 from libervia.backend.core.i18n import _
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29 from libervia.backend.core.log import getLogger
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30 from twisted.words.xish import domish
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31
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32 log = getLogger(__name__)
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34
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35 PLUGIN_INFO = {
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36 C.PI_NAME: "Unique and Stable Stanza IDs",
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37 C.PI_IMPORT_NAME: "XEP-0359",
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38 C.PI_TYPE: "XEP",
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39 C.PI_PROTOCOLS: ["XEP-0359"],
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40 C.PI_MAIN: "XEP_0359",
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41 C.PI_HANDLER: "yes",
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42 C.PI_DESCRIPTION: _("""Implementation of Unique and Stable Stanza IDs"""),
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43 }
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44
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45 NS_SID = "urn:xmpp:sid:0"
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47
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48 class XEP_0359(object):
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49
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50 def __init__(self, host):
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51 log.info(_("Unique and Stable Stanza IDs plugin initialization"))
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52 self.host = host
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53 host.register_namespace("stanza_id", NS_SID)
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54 host.trigger.add("message_parse", self._message_parse_trigger)
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55 host.trigger.add("send_message_data", self._send_message_data_trigger)
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56
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57 def _message_parse_trigger(self, client, message_elt, mess_data):
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58 """Check if message has a stanza-id"""
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59 stanza_id = self.get_stanza_id(message_elt, client.jid.userhostJID())
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60 if stanza_id is not None:
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61 mess_data['extra']['stanza_id'] = stanza_id
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62 origin_id = self.get_origin_id(message_elt)
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63 if origin_id is not None:
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64 mess_data['extra']['origin_id'] = origin_id
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65 return True
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66
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67 def _send_message_data_trigger(self, client, mess_data):
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68 origin_id = mess_data["extra"].get("origin_id")
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69 if not origin_id:
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70 origin_id = str(uuid.uuid4())
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71 mess_data["extra"]["origin_id"] = origin_id
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72 message_elt = mess_data["xml"]
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73 self.add_origin_id(message_elt, origin_id)
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74
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75 def get_stanza_id(self, element, by):
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76 """Return stanza-id if found in element
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77
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78 @param element(domish.Element): element to parse
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79 @param by(jid.JID): entity which should have set a stanza-id
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80 @return (unicode, None): stanza-id if found
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81 """
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82 stanza_id = None
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83 for stanza_elt in element.elements(NS_SID, "stanza-id"):
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84 if stanza_elt.getAttribute("by") == by.full():
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85 if stanza_id is not None:
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86 # we must not have more than one element (§3 #4)
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87 raise exceptions.DataError(
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88 "More than one corresponding stanza-id found!")
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89 stanza_id = stanza_elt.getAttribute("id")
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90 # we don't break to be sure that there is no more than one element
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91 # with this "by" attribute
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92
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93 return stanza_id
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94
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95 def add_stanza_id(self, client, element, stanza_id, by=None):
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96 """Add a <stanza-id/> to a stanza
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97
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98 @param element(domish.Element): stanza where the <stanza-id/> must be added
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99 @param stanza_id(unicode): id to use
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100 @param by(jid.JID, None): jid to use or None to use client.jid
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101 """
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102 sid_elt = element.addElement((NS_SID, "stanza-id"))
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103 sid_elt["by"] = client.jid.userhost() if by is None else by.userhost()
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104 sid_elt["id"] = stanza_id
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105
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106 def get_origin_id(self, element: domish.Element) -> Optional[str]:
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107 """Return origin-id if found in element
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108
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109 @param element: element to parse
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110 @return: origin-id if found
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111 """
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112 try:
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113 origin_elt = next(element.elements(NS_SID, "origin-id"))
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114 except StopIteration:
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115 return None
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116 else:
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117 return origin_elt.getAttribute("id")
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118
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119 def add_origin_id(self, element, origin_id=None):
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120 """Add a <origin-id/> to a stanza
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121
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122 @param element(domish.Element): stanza where the <origin-id/> must be added
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123 @param origin_id(str): id to use, None to automatically generate
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124 @return (str): origin_id
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125 """
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126 if origin_id is None:
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127 origin_id = str(uuid.uuid4())
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128 sid_elt = element.addElement((NS_SID, "origin-id"))
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129 sid_elt["id"] = origin_id
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130 return origin_id
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131
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132 def get_handler(self, client):
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133 return XEP_0359_handler()
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134
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135
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136 @implementer(disco.IDisco)
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137 class XEP_0359_handler(xmlstream.XMPPHandler):
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138
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139 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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140 return [disco.DiscoFeature(NS_SID)]
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141
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142 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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143 return []