Mercurial > libervia-backend
annotate src/plugins/plugin_xep_0115.py @ 982:0e80ee1fe9af
plugin XEP-0048: bookmarks (first draft)
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Mon, 07 Apr 2014 16:22:35 +0200 |
| parents | 218149ea1a35 |
| children | 301b342c697a |
| rev | line source |
|---|---|
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1 #!/usr/bin/python |
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2 # -*- coding: utf-8 -*- |
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3 |
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4 # SAT plugin for managing xep-0115 |
| 811 | 5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 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 |
| 771 | 20 from sat.core.i18n import _ |
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21 from sat.core.constants import Const as C |
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22 from logging import debug, info, error, warning |
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23 from twisted.words.xish import domish |
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24 from twisted.words.protocols.jabber import jid |
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25 from twisted.internet import defer |
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26 from zope.interface import implements |
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27 from wokkel import disco, iwokkel |
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28 |
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29 try: |
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30 from twisted.words.protocols.xmlstream import XMPPHandler |
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31 except ImportError: |
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32 from wokkel.subprotocols import XMPPHandler |
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33 |
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34 PRESENCE = '/presence' |
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35 NS_ENTITY_CAPABILITY = 'http://jabber.org/protocol/caps' |
| 953 | 36 NS_CAPS_OPTIMIZE = 'http://jabber.org/protocol/caps#optimize' |
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37 CAPABILITY_UPDATE = PRESENCE + '/c[@xmlns="' + NS_ENTITY_CAPABILITY + '"]' |
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38 |
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39 PLUGIN_INFO = { |
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40 "name": "XEP 0115 Plugin", |
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41 "import_name": "XEP-0115", |
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42 "type": "XEP", |
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43 "protocols": ["XEP-0115"], |
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44 "dependencies": [], |
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45 "main": "XEP_0115", |
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46 "handler": "yes", |
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47 "description": _("""Implementation of entity capabilities""") |
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48 } |
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49 |
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50 |
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51 class XEP_0115(object): |
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52 cap_hash = None # capabilities hash is class variable as it is common to all profiles |
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53 |
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54 def __init__(self, host): |
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55 info(_("Plugin XEP_0115 initialization")) |
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56 self.host = host |
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57 host.trigger.add("Disco handled", self._checkHash) |
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58 host.trigger.add("Presence send", self._presenceTrigger) |
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59 |
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60 def getHandler(self, profile): |
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61 return XEP_0115_handler(self, profile) |
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62 |
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63 def _checkHash(self, disco_d, profile): |
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64 client = self.host.getClient(profile) |
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65 client.caps_optimize = None |
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66 |
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67 if XEP_0115.cap_hash is None: |
| 953 | 68 disco_d.addCallback(lambda dummy: self.host.hasFeature(NS_CAPS_OPTIMIZE, profile_key=profile)) |
| 69 def updateOptimize(optimize): | |
| 70 client.caps_optimize = optimize | |
| 71 if optimize: | |
| 72 info(_("Caps optimisation enabled")) | |
| 73 client.caps_sent = False | |
| 74 else: | |
| 75 warning(_("Caps optimisation not available")) | |
| 76 disco_d.addCallback(updateOptimize) | |
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77 disco_d.addCallback(lambda dummy: self.recalculateHash(profile)) |
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78 return True |
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79 |
| 953 | 80 def _presenceTrigger(self, client, obj): |
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81 if XEP_0115.cap_hash is not None: |
| 953 | 82 if client.caps_optimize: |
| 83 if client.caps_sent: | |
| 84 return True | |
| 85 client.caps_sent = True | |
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86 obj.addChild(XEP_0115.c_elt) |
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87 return True |
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88 |
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89 @defer.inlineCallbacks |
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90 def recalculateHash(self, profile): |
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91 client = self.host.getClient(profile) |
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92 _infos = yield client.discoHandler.info(client.jid, client.jid, '') |
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93 disco_infos = disco.DiscoInfo() |
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94 for item in _infos: |
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95 disco_infos.append(item) |
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96 cap_hash = self.host.memory.disco.generateHash(disco_infos) |
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97 info("Our capability hash has been generated: [%s]" % cap_hash) |
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98 debug("Generating capability domish.Element") |
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99 c_elt = domish.Element((NS_ENTITY_CAPABILITY, 'c')) |
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100 c_elt['hash'] = 'sha-1' |
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101 c_elt['node'] = C.APP_URL |
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102 c_elt['ver'] = cap_hash |
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103 XEP_0115.cap_hash = cap_hash |
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104 XEP_0115.c_elt = c_elt |
| 953 | 105 if client.caps_optimize: |
| 106 client.caps_sent = False | |
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107 if cap_hash not in self.host.memory.disco.hashes: |
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108 self.host.memory.disco.hashes[cap_hash] = disco_infos |
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109 self.host.memory.updateEntityData(client.jid, C.ENTITY_CAP_HASH, cap_hash, profile) |
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110 |
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111 |
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112 class XEP_0115_handler(XMPPHandler): |
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113 implements(iwokkel.IDisco) |
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114 |
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115 def __init__(self, plugin_parent, profile): |
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116 self.plugin_parent = plugin_parent |
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117 self.host = plugin_parent.host |
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118 self.profile = profile |
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119 |
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120 def connectionInitialized(self): |
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121 self.xmlstream.addObserver(CAPABILITY_UPDATE, self.update) |
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122 |
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123 def getDiscoInfo(self, requestor, target, nodeIdentifier=''): |
| 953 | 124 return [disco.DiscoFeature(NS_ENTITY_CAPABILITY), disco.DiscoFeature(NS_CAPS_OPTIMIZE)] |
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125 |
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126 def getDiscoItems(self, requestor, target, nodeIdentifier=''): |
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127 return [] |
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128 |
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129 @defer.inlineCallbacks |
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130 def update(self, presence): |
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131 """ |
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132 Manage the capabilities of the entity |
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133 |
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134 Check if we know the version of this capatilities and get the capibilities if necessary |
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135 """ |
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136 from_jid = jid.JID(presence['from']) |
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137 c_elem = presence.elements(NS_ENTITY_CAPABILITY, 'c').next() |
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138 try: |
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139 c_ver = c_elem['ver'] |
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140 c_hash = c_elem['hash'] |
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141 c_node = c_elem['node'] |
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142 except KeyError: |
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143 warning(_('Received invalid capabilities tag')) |
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144 return |
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145 |
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146 if c_ver in self.host.memory.disco.hashes: |
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147 # we already know the hash, we update the jid entity |
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148 debug ("hash [%(hash)s] already in cache, updating entity [%(jid)s]" % {'hash': c_ver, 'jid': from_jid.full()}) |
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149 self.host.memory.updateEntityData(from_jid, C.ENTITY_CAP_HASH, c_ver, self.profile) |
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150 return |
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151 |
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152 yield self.host.getDiscoInfos(from_jid, self.profile) |
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153 if c_hash != 'sha-1': |
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154 #unknown hash method |
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155 warning(_('Unknown hash method for entity capabilities: [%(hash_method)s] (entity: %(jid)s, node: %(node)s)') % {'hash_method':c_hash, 'jid': from_jid, 'node': c_node}) |
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156 computed_hash = self.host.memory.getEntityDatum(from_jid, C.ENTITY_CAP_HASH, self.profile) |
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157 if computed_hash != c_ver: |
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158 warning(_('Computed hash differ from given hash:\ngiven: [%(given_hash)s]\ncomputed: [%(computed_hash)s]\n(entity: %(jid)s, node: %(node)s)') % {'given_hash':c_ver, 'computed_hash': computed_hash, 'jid': from_jid, 'node': c_node}) |
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159 |
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160 # TODO: me must manage the full algorithm described at XEP-0115 #5.4 part 3 |