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annotate libervia/backend/plugins/plugin_xep_0352.py @ 4340:ea72364131d5 default tip @

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doc (components): Update Email Gateway documentation: A section has been added to explain how attachments are handled. fix 453
author Goffi <goffi@goffi.org>
date Tue, 03 Dec 2024 00:53:18 +0100
parents 0d7bb4df2343
children
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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 Explicit Message Encryption
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from twisted.words.xish import domish
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21 from libervia.backend.core.i18n import _, D_
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22 from libervia.backend.core.constants import Const as C
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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
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27 PLUGIN_INFO = {
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28 C.PI_NAME: "Client State Indication",
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29 C.PI_IMPORT_NAME: "XEP-0352",
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30 C.PI_TYPE: C.PLUG_TYPE_XEP,
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31 C.PI_PROTOCOLS: ["XEP-0352"],
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32 C.PI_DEPENDENCIES: [],
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33 C.PI_MAIN: "XEP_0352",
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34 C.PI_HANDLER: "no",
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35 C.PI_DESCRIPTION: D_(
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36 "Notify server when frontend is not actively used, to limit "
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37 "traffic and save bandwidth and battery life"
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38 ),
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39 }
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40
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41 NS_CSI = "urn:xmpp:csi:0"
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42
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43
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44 class XEP_0352(object):
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45
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46 def __init__(self, host):
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47 log.info(_("Client State Indication plugin initialization"))
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48 self.host = host
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49 host.register_namespace("csi", NS_CSI)
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50
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51 def is_active(self, client):
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52 try:
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53 if not client._xep_0352_enabled:
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54 return True
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55 return client._xep_0352_active
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56 except AttributeError:
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57 # _xep_0352_active can not be set if is_active is called before
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58 # profile_connected has been called
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59 log.debug(
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60 "is_active called when XEP-0352 plugin has not yet set the " "attributes"
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61 )
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62 return True
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63
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64 def profile_connected(self, client):
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65 if (NS_CSI, "csi") in client.xmlstream.features:
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66 log.info(_("Client State Indication is available on this server"))
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67 client._xep_0352_enabled = True
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68 client._xep_0352_active = True
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69 else:
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70 log.warning(
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71 _(
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72 "Client State Indication is not available on this server, some"
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73 " bandwidth optimisations can't be used."
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74 )
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75 )
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76 client._xep_0352_enabled = False
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77
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78 def set_inactive(self, client):
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79 if self.is_active(client):
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80 inactive_elt = domish.Element((NS_CSI, "inactive"))
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81 client.send(inactive_elt)
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82 client._xep_0352_active = False
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83 log.info("inactive state set")
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84
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85 def set_active(self, client):
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86 if not self.is_active(client):
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87 active_elt = domish.Element((NS_CSI, "active"))
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88 client.send(active_elt)
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89 client._xep_0352_active = True
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90 log.info("active state set")