Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0422.py @ 4309:b56b1eae7994

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component email gateway: add multicasting: XEP-0033 multicasting is now supported both for incoming and outgoing messages. XEP-0033 metadata are converted to suitable Email headers and vice versa. Email address and JID are both supported, and delivery is done by the gateway when suitable on incoming messages. rel 450
author Goffi <goffi@goffi.org>
date Thu, 26 Sep 2024 16:12:01 +0200
parents 0d7bb4df2343
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/env python3
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2
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3 # Copyright (C) 2009-2022 Jérôme Poisson (goffi@goffi.org)
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4
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5 # This program is free software: you can redistribute it and/or modify
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6 # it under the terms of the GNU Affero General Public License as published by
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7 # the Free Software Foundation, either version 3 of the License, or
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8 # (at your option) any later version.
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9
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10 # This program is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU Affero General Public License for more details.
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14
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15 # You should have received a copy of the GNU Affero General Public License
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16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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17
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18 from typing import Optional, List, Tuple, Union, NamedTuple
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19 from collections import namedtuple
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20
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21 from twisted.words.protocols.jabber import xmlstream
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22 from twisted.words.xish import domish
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23 from wokkel import disco
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24 from zope.interface import implementer
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25
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26 from libervia.backend.core.constants import Const as C
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27 from libervia.backend.core.i18n import _
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28 from libervia.backend.core.log import getLogger
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29 from libervia.backend.core.core_types import SatXMPPEntity
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30 from libervia.backend.memory.sqla_mapping import History
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31 from libervia.backend.tools.common.async_utils import async_lru
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32
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33 log = getLogger(__name__)
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34
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35
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36 PLUGIN_INFO = {
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37 C.PI_NAME: "Message Fastening",
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38 C.PI_IMPORT_NAME: "XEP-0422",
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39 C.PI_TYPE: "XEP",
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40 C.PI_MODES: C.PLUG_MODE_BOTH,
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41 C.PI_PROTOCOLS: ["XEP-0359", "XEP-0422"],
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42 C.PI_MAIN: "XEP_0422",
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43 C.PI_HANDLER: "yes",
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44 C.PI_DESCRIPTION: _("""Implementation Message Fastening"""),
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45 }
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46
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47 NS_FASTEN = "urn:xmpp:fasten:0"
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48
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49
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50 class FastenMetadata(NamedTuple):
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51 elements: List[domish.Element]
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52 id: str
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53 history: Optional[History]
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54 clear: bool
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55 shell: bool
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56
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57
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58 class XEP_0422(object):
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59
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60 def __init__(self, host):
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61 log.info(_("XEP-0422 (Message Fastening) plugin initialization"))
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62 self.host = host
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63 host.register_namespace("fasten", NS_FASTEN)
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64
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65 def get_handler(self, __):
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66 return XEP_0422_handler()
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67
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68 def apply_to_elt(
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69 self,
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70 message_elt: domish.Element,
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71 origin_id: str,
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72 clear: Optional[bool] = None,
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73 shell: Optional[bool] = None,
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74 children: Optional[List[domish.Element]] = None,
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75 external: Optional[List[Union[str, Tuple[str, str]]]] = None,
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76 ) -> domish.Element:
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77 """Generate, add and return <apply-to> element
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78
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79 @param message_elt: wrapping <message> element
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80 @param origin_id: origin ID of the target message
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81 @param clear: set to True to remove a fastening
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82 @param shell: set to True when using e2ee shell
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83 cf. https://xmpp.org/extensions/xep-0422.html#encryption
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84 @param children: element to fasten to the target message
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85 <apply-to> element is returned, thus children can also easily be added
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86 afterwards
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87 @param external: <external> element to add
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88 cf. https://xmpp.org/extensions/xep-0422.html#external-payloads
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89 the list items can either be a str with only the element name,
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90 or a tuple which must then be (namespace, name)
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91 @return: <apply-to> element, which is already added to the wrapping message_elt
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92 """
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93 apply_to_elt = message_elt.addElement((NS_FASTEN, "apply-to"))
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94 apply_to_elt["id"] = origin_id
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95 if clear is not None:
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96 apply_to_elt["clear"] = C.bool_const(clear)
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97 if shell is not None:
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98 apply_to_elt["shell"] = C.bool_const(shell)
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99 if children is not None:
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100 for child in children:
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101 apply_to_elt.addChild(child)
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102 if external is not None:
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103 for ext in external:
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104 external_elt = apply_to_elt.addElement("external")
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105 if isinstance(ext, str):
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106 external_elt["name"] = ext
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107 else:
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108 ns, name = ext
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109 external_elt["name"] = name
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110 external_elt["element-namespace"] = ns
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111 return apply_to_elt
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112
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113 @async_lru(maxsize=5)
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114 async def get_fastened_elts(
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115 self, client: SatXMPPEntity, message_elt: domish.Element
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116 ) -> Optional[FastenMetadata]:
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117 """Get fastened elements
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118
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119 if the message contains no <apply-to> element, None is returned
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120 """
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121 try:
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122 apply_to_elt = next(message_elt.elements(NS_FASTEN, "apply-to"))
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123 except StopIteration:
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124 return None
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125 else:
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126 origin_id = apply_to_elt.getAttribute("id")
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127 if not origin_id:
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128 log.warning(f"Received invalid fastening message: {message_elt.toXml()}")
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129 return None
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130 elements = apply_to_elt.children
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131 if not elements:
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132 log.warning(f"No element to fasten: {message_elt.toXml()}")
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133 return None
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134 history = await self.host.memory.storage.get(
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135 client,
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136 History,
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137 History.origin_id,
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138 origin_id,
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139 (History.messages, History.subjects, History.thread),
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140 )
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141 return FastenMetadata(
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142 elements,
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143 origin_id,
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144 history,
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145 C.bool(apply_to_elt.getAttribute("clear", C.BOOL_FALSE)),
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146 C.bool(apply_to_elt.getAttribute("shell", C.BOOL_FALSE)),
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147 )
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148
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149
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150 @implementer(disco.IDisco)
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151 class XEP_0422_handler(xmlstream.XMPPHandler):
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152
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153 def getDiscoInfo(self, __, target, nodeIdentifier=""):
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154 return [disco.DiscoFeature(NS_FASTEN)]
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155
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156 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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157 return []