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annotate sat/plugins/plugin_xep_0352.py @ 2886:b06cb71079fa

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core (xmpp): new networkEnabled() and networkDisabled() methods: those methods can be called by platform specific plugins when network is known to be (un)available. This way, connection attempts can be cancelled when no network is available, saving resources (notably battery on mobile devices), or attempts can be restarted immediately when network is known to be available again.
author Goffi <goffi@goffi.org>
date Sat, 06 Apr 2019 19:05:57 +0200
parents 0c54970d8e6e
children ab2696e34d29
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9a019db21f3c plugin XEP-0352: implementation of Client State Indication
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for Explicit Message Encryption
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5 # Copyright (C) 2009-2019 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 sat.core.i18n import _, D_
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22 from sat.core.constants import Const as C
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23 from sat.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: u"Client State Indication",
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29 C.PI_IMPORT_NAME: u"XEP-0352",
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30 C.PI_TYPE: C.PLUG_TYPE_XEP,
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31 C.PI_PROTOCOLS: [u"XEP-0352"],
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32 C.PI_DEPENDENCIES: [],
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33 C.PI_MAIN: u"XEP_0352",
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34 C.PI_HANDLER: u"no",
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35 C.PI_DESCRIPTION: D_(u"Notify server when frontend is not actively used, to limit "
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36 u"traffic and save bandwidth and battery life"),
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37 }
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38
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39 NS_CSI = u"urn:xmpp:csi:0"
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40
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41
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42 class XEP_0352(object):
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43
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44 def __init__(self, host):
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45 log.info(_(u"Client State Indication plugin initialization"))
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46 self.host = host
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47 host.registerNamespace(u"csi", NS_CSI)
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48
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49 def isActive(self, client):
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50 try:
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51 if not client._xep_0352_enabled:
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52 return True
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53 return client._xep_0352_active
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54 except AttributeError:
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55 # _xep_0352_active can not be set if isActive is called before
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56 # profileConnected has been called
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57 log.debug(u"isActive called when XEP-0352 plugin has not yet set the "
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58 u"attributes")
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59 return True
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60
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61 def profileConnected(self, client):
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62 if (NS_CSI, u'csi') in client.xmlstream.features:
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63 log.info(_(u"Client State Indication is available on this server"))
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64 client._xep_0352_enabled = True
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65 client._xep_0352_active = True
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66 else:
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67 log.warning(_(u"Client State Indication is not available on this server, some"
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68 u" bandwidth optimisations can't be used."))
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69 client._xep_0352_enabled = False
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70
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71 def setInactive(self, client):
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72 if self.isActive(client):
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73 inactive_elt = domish.Element((NS_CSI, u'inactive'))
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74 client.send(inactive_elt)
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75 client._xep_0352_active = False
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76 log.info(u"inactive state set")
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77
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78 def setActive(self, client):
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79 if not self.isActive(client):
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80 active_elt = domish.Element((NS_CSI, u'active'))
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81 client.send(active_elt)
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82 client._xep_0352_active = True
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83 log.info(u"active state set")