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annotate sat/plugins/plugin_xep_0352.py @ 2947:05339e9acfd4

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changelog: added setup.py and VERSION
author Goffi <goffi@goffi.org>
date Sun, 05 May 2019 20:20:46 +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")