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annotate libervia/backend/plugins/plugin_xep_0428.py @ 4219:1b5cf2ee1d86

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plugin XEP-0384, XEP-0391: download missing devices list: when a peer jid was not in our roster, devices list was not retrieved, resulting in failed en/decryption. This patch does check it and download missing devices list in necessary. There is no subscription managed yet, so the list won't be updated in case of new devices, this should be addressed at some point.
author Goffi <goffi@goffi.org>
date Tue, 05 Mar 2024 17:31:36 +0100
parents a1f7040b5a15
children 0d7bb4df2343
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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
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19
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20 from twisted.words.protocols.jabber import xmlstream
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21 from twisted.words.xish import domish
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22 from wokkel import disco
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23 from zope.interface import implementer
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24
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25 from libervia.backend.core.constants import Const as C
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26 from libervia.backend.core.i18n import _
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27 from libervia.backend.core.log import getLogger
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28
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29 log = getLogger(__name__)
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30
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31
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32 PLUGIN_INFO = {
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33 C.PI_NAME: "Fallback Indication",
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34 C.PI_IMPORT_NAME: "XEP-0428",
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35 C.PI_TYPE: "XEP",
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36 C.PI_MODES: C.PLUG_MODE_BOTH,
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37 C.PI_PROTOCOLS: ["XEP-0428"],
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38 C.PI_MAIN: "XEP_0428",
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39 C.PI_HANDLER: "yes",
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40 C.PI_DESCRIPTION: _("""Implementation of XEP-0428 (Fallback Indication)"""),
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41 }
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42
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43 NS_FALLBACK = "urn:xmpp:fallback:0"
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44
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45
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46 class XEP_0428(object):
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47
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48 def __init__(self, host):
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49 log.info(_("XEP-0428 (Fallback Indication) plugin initialization"))
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50 host.register_namespace("fallback", NS_FALLBACK)
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51
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52 def add_fallback_elt(
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53 self,
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54 message_elt: domish.Element,
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55 msg: Optional[str] = None
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56 ) -> None:
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57 """Add the fallback indication element
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58
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59 @param message_elt: <message> element where the indication must be
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60 set
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61 @param msg: message to show as fallback
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62 Will be added as <body>
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63 """
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64 message_elt.addElement((NS_FALLBACK, "fallback"))
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65 if msg is not None:
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66 message_elt.addElement("body", content=msg)
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67
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68 def has_fallback(self, message_elt: domish.Element) -> bool:
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69 """Tell if a message has a fallback indication"""
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70 try:
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71 next(message_elt.elements(NS_FALLBACK, "fallback"))
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72 except StopIteration:
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73 return False
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74 else:
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75 return True
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76
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77 def get_handler(self, __):
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78 return XEP_0428_handler()
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79
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80
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81 @implementer(disco.IDisco)
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82 class XEP_0428_handler(xmlstream.XMPPHandler):
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83
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84 def getDiscoInfo(self, __, target, nodeIdentifier=""):
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85 return [disco.DiscoFeature(NS_FALLBACK)]
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86
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87 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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88 return []