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annotate sat_pubsub/privilege.py @ 285:a87c155d0fd5

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replaced former roster dirty hack by a XEP-0356 first draft implementation, only roster get is implemented so far
author Goffi <goffi@goffi.org>
date Tue, 31 Mar 2015 17:31:56 +0200
parents sat_pubsub/remote_roster.py@002c59dbc23f
children 2f87fa282dfd
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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 """
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5 Copyright (c) 2003-2011 Ralph Meijer
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6 Copyright (c) 2012, 2013, 2014, 2015 Jérôme Poisson
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7
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8
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9 This program is free software: you can redistribute it and/or modify
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10 it under the terms of the GNU Affero General Public License as published by
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11 the Free Software Foundation, either version 3 of the License, or
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12 (at your option) any later version.
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13
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14 This program is distributed in the hope that it will be useful,
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15 but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 GNU Affero General Public License for more details.
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18
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19 You should have received a copy of the GNU Affero General Public License
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20 along with this program. If not, see <http://www.gnu.org/licenses/>.
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21 --
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22
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23 This program is based on Idavoll (http://idavoll.ik.nu/),
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24 originaly written by Ralph Meijer (http://ralphm.net/blog/)
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25 It is sublicensed under AGPL v3 (or any later version) as allowed by the original
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26 license.
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27
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28 --
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29
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30 Here is a copy of the original license:
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31
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32 Copyright (c) 2003-2011 Ralph Meijer
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33
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34 Permission is hereby granted, free of charge, to any person obtaining
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35 a copy of this software and associated documentation files (the
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36 "Software"), to deal in the Software without restriction, including
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37 without limitation the rights to use, copy, modify, merge, publish,
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38 distribute, sublicense, and/or sell copies of the Software, and to
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39 permit persons to whom the Software is furnished to do so, subject to
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40 the following conditions:
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41
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42 The above copyright notice and this permission notice shall be
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43 included in all copies or substantial portions of the Software.
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44
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45 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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46 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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47 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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48 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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49 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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50 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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51 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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52
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53 """
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54
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55 """
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56 Remote roster client.
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57
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58 This module access roster throught a hacked version of
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59 remote roster management http://jkaluza.fedorapeople.org/remote-roster.html
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60 """
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61
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62 from wokkel import xmppim
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63 from wokkel.compat import IQ
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64 from wokkel.subprotocols import XMPPHandler
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65 from twisted.python import log
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66 from twisted.python import failure
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68 PRIV_ENT_NS = 'urn:xmpp:privilege:1'
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69 PRIV_ENT_ADV_XPATH = '/message/privilege[@xmlns="{}"]'.format(PRIV_ENT_NS)
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70 ROSTER_NS = 'jabber:iq:roster'
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71 PERM_ROSTER = 'roster'
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72 PERM_MESSAGE = 'message'
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73 PERM_PRESENCE = 'presence'
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74 ALLOWED_ROSTER = ('none', 'get', 'set', 'both')
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75 ALLOWED_MESSAGE = ('none', 'outgoing')
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76 ALLOWED_PRESENCE = ('none', 'managed_entity', 'roster')
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77 TO_CHECK = {PERM_ROSTER:ALLOWED_ROSTER, PERM_MESSAGE:ALLOWED_MESSAGE, PERM_PRESENCE:ALLOWED_PRESENCE}
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78
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79
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80 class InvalidStanza(Exception):
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81 pass
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82
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83 class NotAllowedError(Exception):
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84 pass
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85
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86 class PrivilegesHandler(XMPPHandler):
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87 #FIXME: need to manage updates, and database sync
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88 #TODO: cache
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89
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90 def __init__(self):
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91 super(PrivilegesHandler, self).__init__()
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92 self._permissions = {PERM_ROSTER: 'none',
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93 PERM_MESSAGE: 'none',
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94 PERM_PRESENCE: 'none'}
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95
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96 @property
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97 def permissions(self):
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98 return self._permissions
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99
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100 def connectionInitialized(self):
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101 self.xmlstream.addObserver(PRIV_ENT_ADV_XPATH, self.onAdvertise)
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102
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103 def onAdvertise(self, message):
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104 """Managage the <message/> advertising privileges
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105
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106 self._permissions will be updated according to advertised privileged
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107 """
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108 privilege_elt = message.elements(PRIV_ENT_NS, 'privilege').next()
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109 for perm_elt in privilege_elt.elements(PRIV_ENT_NS):
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110 try:
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111 if perm_elt.name != 'perm':
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112 raise InvalidStanza(u'unexpected element {}'.format(perm_elt.name))
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113 perm_access = perm_elt['access']
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114 perm_type = perm_elt['type']
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115 try:
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116 if perm_type not in TO_CHECK[perm_access]:
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117 raise InvalidStanza(u'bad type [{}] for permission {}'.format(perm_type, perm_access))
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118 except KeyError:
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119 raise InvalidStanza(u'bad permission [{}]'.format(perm_access))
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120 except InvalidStanza as e:
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121 log.msg("Invalid stanza received ({}), setting permission to none".format(e))
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122 for perm in self._permissions:
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123 self._permissions[perm] = 'none'
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124 break
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125
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126 self._permissions[perm_access] = perm_type or 'none'
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127
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128 log.msg('Privileges updated: roster={roster}, message={message}, presence={presence}'.format(**self._permissions))
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129
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130
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131 def getRoster(self, to_jid):
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132 """
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133 Retrieve contact list.
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134
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135 @return: Roster as a mapping from L{JID} to L{RosterItem}.
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136 @rtype: L{twisted.internet.defer.Deferred}
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137 """
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138 if self._permissions[PERM_ROSTER] not in ('get', 'both'):
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139 log.msg("WARNING: permission not allowed to get roster")
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140 raise failure.Failure(NotAllowedError('roster get is not allowed'))
242
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141
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142 def processRoster(result):
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143 roster = {}
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144 for element in result.elements(ROSTER_NS, 'item'):
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145 item = xmppim.RosterItem.fromElement(element)
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146 roster[item.entity] = item
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147
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148 return roster
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149
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150 iq = IQ(self.xmlstream, 'get')
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151 iq.addElement((ROSTER_NS, 'query'))
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152 iq["to"] = to_jid.userhost()
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153 d = iq.send()
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154 d.addCallback(processRoster)
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155 return d
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156
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157