Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0334.py @ 4242:8acf46ed7f36

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frontends: remote control implementation: This is the frontends common part of remote control implementation. It handle the creation of WebRTC session, and management of inputs. For now the reception use freedesktop.org Desktop portal, and works mostly with Wayland based Desktop Environments. rel 436
author Goffi <goffi@goffi.org>
date Sat, 11 May 2024 13:52:43 +0200
parents 3b3cd9453d9b
children 0d7bb4df2343
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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 Delayed Delivery (XEP-0334)
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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 Iterable
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22 from libervia.backend.core.i18n import _, D_
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23 from libervia.backend.core.log import getLogger
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24
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25 log = getLogger(__name__)
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26 from libervia.backend.core.constants import Const as C
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27
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28 from libervia.backend.tools.common import data_format
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29
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30 from wokkel import disco, iwokkel
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31
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32 from twisted.words.protocols.jabber import xmlstream
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33 from twisted.words.xish import domish
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34 from zope.interface import implementer
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35 from textwrap import dedent
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37
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38 PLUGIN_INFO = {
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39 C.PI_NAME: "Message Processing Hints",
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40 C.PI_IMPORT_NAME: "XEP-0334",
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41 C.PI_TYPE: "XEP",
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42 C.PI_MODES: C.PLUG_MODE_BOTH,
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43 C.PI_PROTOCOLS: ["XEP-0334"],
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44 C.PI_MAIN: "XEP_0334",
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45 C.PI_HANDLER: "yes",
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46 C.PI_DESCRIPTION: D_("""Implementation of Message Processing Hints"""),
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47 C.PI_USAGE: dedent(
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48 D_(
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49 """\
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50 Frontends can use HINT_* constants in mess_data['extra'] in a serialized 'hints' dict.
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51 Internal plugins can use directly add_hint([HINT_* constant]).
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52 Will set mess_data['extra']['history'] to 'skipped' when no store is requested and message is not saved in history."""
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53 )
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54 ),
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55 }
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56
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57 NS_HINTS = "urn:xmpp:hints"
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58
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59
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60 class XEP_0334(object):
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61 HINT_NO_PERMANENT_STORE = "no-permanent-store"
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62 HINT_NO_STORE = "no-store"
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63 HINT_NO_COPY = "no-copy"
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64 HINT_STORE = "store"
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65 HINTS = (HINT_NO_PERMANENT_STORE, HINT_NO_STORE, HINT_NO_COPY, HINT_STORE)
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66
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67 def __init__(self, host):
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68 log.info(_("Message Processing Hints plugin initialization"))
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69 self.host = host
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70 host.trigger.add("sendMessage", self.send_message_trigger)
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71 host.trigger.add("message_received", self.message_received_trigger, priority=-1000)
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72
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73 def get_handler(self, client):
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74 return XEP_0334_handler()
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75
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76 def add_hint(self, mess_data, hint):
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77 if hint == self.HINT_NO_COPY and not mess_data["to"].resource:
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78 log.error(
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79 "{hint} can only be used with full jids! Ignoring it.".format(hint=hint)
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80 )
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81 return
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82 hints = mess_data.setdefault("hints", set())
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83 if hint in self.HINTS:
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84 hints.add(hint)
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85 else:
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86 log.error("Unknown hint: {}".format(hint))
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87
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88 def add_hint_elements(self, message_elt: domish.Element, hints: Iterable[str]) -> None:
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89 """Add hints elements to message stanza
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90
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91 @param message_elt: stanza where hints must be added
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92 @param hints: hints to add
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93 """
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94 for hint in hints:
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95 if not list(message_elt.elements(NS_HINTS, hint)):
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96 message_elt.addElement((NS_HINTS, hint))
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97 else:
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98 log.debug(f'Not adding {hint!r} hint: it is already present in <message>')
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99
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100 def _send_post_xml_treatment(self, mess_data):
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101 if "hints" in mess_data:
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102 self.add_hint_elements(mess_data["xml"], mess_data["hints"])
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103 return mess_data
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104
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105 def send_message_trigger(
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106 self, client, mess_data, pre_xml_treatments, post_xml_treatments
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107 ):
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108 """Add the hints element to the message to be sent"""
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109 if "hints" in mess_data["extra"]:
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110 for hint in data_format.dict2iter("hints", mess_data["extra"], pop=True):
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111 self.add_hint(hint)
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112
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113 post_xml_treatments.addCallback(self._send_post_xml_treatment)
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114 return True
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115
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116 def _received_skip_history(self, mess_data):
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117 mess_data["history"] = C.HISTORY_SKIP
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118 return mess_data
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119
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120 def message_received_trigger(self, client, message_elt, post_treat):
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121 """Check for hints in the received message"""
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122 for elt in message_elt.elements():
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123 if elt.uri == NS_HINTS and elt.name in (
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124 self.HINT_NO_PERMANENT_STORE,
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125 self.HINT_NO_STORE,
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126 ):
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127 log.debug("history will be skipped for this message, as requested")
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128 post_treat.addCallback(self._received_skip_history)
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129 break
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130 return True
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131
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132
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133 @implementer(iwokkel.IDisco)
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134 class XEP_0334_handler(xmlstream.XMPPHandler):
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135
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136 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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137 return [disco.DiscoFeature(NS_HINTS)]
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138
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139 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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140 return []