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annotate sat/plugins/plugin_xep_0422.py @ 3913:944f51f9c2b4

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core (xmpp): make `send` a blocking method, fix `sendMessageData` calls: original `send` method is blocking, and it is used as such by Wokkel and thus can't be changed to an async method easily. However, an Async method is necessary to have an async trigger at the very end of the send workflow for end-to-end encryption. To workaround that, `send` is an async method which call `a_send`, an async method which actually does the sending. This way legacy method can still call `send` while `a_send` can be await otherwise. Fix calls to `sendMessageData`: the method now being an `async` one, `ensureDeferred` had to be used in some calls.
author Goffi <goffi@goffi.org>
date Sat, 24 Sep 2022 16:31:39 +0200
parents 60724ff3f273
children 524856bd7b19
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3799
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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 sat.core.constants import Const as C
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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 from sat.core.core_types import SatXMPPEntity
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30 from sat.memory.sqla_mapping import History
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31 from sat.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.registerNamespace("fasten", NS_FASTEN)
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64
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65 def getHandler(self, __):
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66 return XEP_0422_handler()
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67
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68 def applyToElt(
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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.boolConst(clear)
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97 if shell is not None:
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98 apply_to_elt["shell"] = C.boolConst(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 getFastenedElts(
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115 self,
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116 client: SatXMPPEntity,
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117 message_elt: domish.Element
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118 ) -> Optional[FastenMetadata]:
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119 """Get fastened elements
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120
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121 if the message contains no <apply-to> element, None is returned
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122 """
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123 try:
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124 apply_to_elt = next(message_elt.elements(NS_FASTEN, "apply-to"))
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125 except StopIteration:
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126 return None
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127 else:
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128 origin_id = apply_to_elt.getAttribute("id")
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129 if not origin_id:
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130 log.warning(
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131 f"Received invalid fastening message: {message_elt.toXml()}"
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132 )
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133 return None
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134 elements = apply_to_elt.children
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135 if not elements:
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136 log.warning(f"No element to fasten: {message_elt.toXml()}")
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137 return None
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138 history = await self.host.memory.storage.get(
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139 client,
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140 History,
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141 History.origin_id,
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142 origin_id,
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143 (History.messages, History.subjects, History.thread)
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144 )
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145 return FastenMetadata(
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146 elements,
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147 origin_id,
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148 history,
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149 C.bool(apply_to_elt.getAttribute("clear", C.BOOL_FALSE)),
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150 C.bool(apply_to_elt.getAttribute("shell", C.BOOL_FALSE)),
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151 )
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152
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153
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154 @implementer(disco.IDisco)
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155 class XEP_0422_handler(xmlstream.XMPPHandler):
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156
60724ff3f273 plugin XEP-0422: Message Fastening implementation:
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157 def getDiscoInfo(self, __, target, nodeIdentifier=""):
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158 return [disco.DiscoFeature(NS_FASTEN)]
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159
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160 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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161 return []