annotate src/mam.py @ 374:40e5edd7ea11

storage: changed items order: items were so far ordered by item_id, i.e. by order of creation. This has been changed to order them by date of last update, so an item overwritting an old one appears on top (with former behaviour, it was staying at the same place). The XEP is not clear on that, but this seems more in correct with § 6.5.7 which says "implementations SHOULD return the N most recent (as opposed to the N oldest) items".
author Goffi <goffi@goffi.org>
date Thu, 03 Jan 2019 20:31:03 +0100
parents dabee42494ac
children 9a787881b824
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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 # Copyright (c) 2016 Jérôme Poisson
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5 # Copyright (c) 2015-2016 Adrien Cossa
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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 """
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21 XMPP Message Archive Management protocol.
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22
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23 This protocol is specified in
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24 U{XEP-0313<http://xmpp.org/extensions/xep-0313.html>}.
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25 """
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26
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28 from zope.interface import implements
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29
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30 from twisted.words.xish import domish
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31 from twisted.python import log
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32 from twisted.words.protocols.jabber import error
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33
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34 from sat_pubsub import const
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35 from sat_pubsub import backend
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36 from wokkel import pubsub
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37
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38 from wokkel import rsm
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39 from wokkel import mam
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40 from wokkel import delay
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42
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43 class MAMResource(object):
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44 implements(mam.IMAMResource)
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45 _errorMap = backend.PubSubResourceFromBackend._errorMap
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46
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47 def __init__(self, backend_):
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48 self.backend = backend_
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49
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50 def _mapErrors(self, failure):
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51 # XXX: come from backend.PubsubResourceFromBackend
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52 e = failure.trap(*self._errorMap.keys())
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54 condition, pubsubCondition, feature = self._errorMap[e]
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55 msg = failure.value.msg
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56
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57 if pubsubCondition:
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58 exc = pubsub.PubSubError(condition, pubsubCondition, feature, msg)
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59 else:
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60 exc = error.StanzaError(condition, text=msg)
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61
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62 raise exc
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63
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64 def onArchiveRequest(self, mam_request):
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65 """
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66
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67 @param mam_request: The MAM archive request.
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68 @type mam_request: L{MAMQueryReques<wokkel.mam.MAMRequest>}
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70 @return: A tuple with list of message data (id, element, data) and RSM element
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71 @rtype: C{tuple}
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72 """
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73 # FIXME: bad result ordering
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74 try:
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75 pep = mam_request.delegated
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76 except AttributeError:
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77 pep = False
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78 ext_data = {'pep': pep}
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79 if mam_request.form:
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80 ext_data['filters'] = mam_request.form.fields.values()
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81 if mam_request.rsm is None:
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82 if const.VAL_RSM_MAX_DEFAULT != None:
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83 log.msg("MAM request without RSM limited to {}".format(const.VAL_RSM_MAX_DEFAULT))
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84 ext_data['rsm'] = rsm.RSMRequest(const.VAL_RSM_MAX_DEFAULT)
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85 else:
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86 ext_data['rsm'] = mam_request.rsm
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87
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88 d = self.backend.getItemsData(mam_request.node, mam_request.sender, mam_request.recipient, None, None, ext_data)
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89
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90 def make_message(elt):
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91 # XXX: http://xmpp.org/extensions/xep-0297.html#sect-idp629952 (rule 3)
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92 message = domish.Element((const.NS_CLIENT, "message"))
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93 event = message.addElement((pubsub.NS_PUBSUB_EVENT, "event"))
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94 items = event.addElement('items')
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95 items["node"] = mam_request.node
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96 items.addChild(elt)
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97 return message
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98
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99 def cb(items_data):
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100 msg_data = []
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101 rsm_elt = None
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102 for item_data in items_data:
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103 if item_data.item.name == 'set' and item_data.item.uri == rsm.NS_RSM:
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104 assert rsm_elt is None
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105 rsm_elt = item_data.item
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106 elif item_data.item.name == 'item':
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107 msg_data.append([item_data.item['id'], make_message(item_data.item), item_data.created])
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108 else:
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109 log.msg("WARNING: unknown element: {}".format(item_data.item.name))
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110 if pep:
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111 # we need to send privileged message
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112 # so me manage the sending ourself, and return
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113 # an empty msg_data list to avoid double sending
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114 for data in msg_data:
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115 self.forwardPEPMessage(mam_request, *data)
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116 msg_data = []
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117 return (msg_data, rsm_elt)
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118
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119 d.addErrback(self._mapErrors)
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120 d.addCallback(cb)
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121 return d
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122
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123 def forwardPEPMessage(self, mam_request, id_, elt, created):
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124 msg = domish.Element((None, 'message'))
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125 msg['from'] = self.backend.privilege.server_jid.full()
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126 msg['to'] = mam_request.sender.full()
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127 result = msg.addElement((mam.NS_MAM, 'result'))
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128 if mam_request.query_id is not None:
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129 result['queryid'] = mam_request.query_id
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130 result['id'] = id_
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131 forward = result.addElement((const.NS_FORWARD, 'forwarded'))
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132 forward.addChild(delay.Delay(created).toElement())
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133 forward.addChild(elt)
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134 self.backend.privilege.sendMessage(msg)
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135
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136 def onPrefsGetRequest(self, requestor):
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137 """
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138
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139 @param requestor: JID of the requestor.
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140 @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
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141
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142 @return: The current settings.
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143 @rtype: L{wokkel.mam.MAMPrefs}
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144 """
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145 # TODO: return the actual current settings
316
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146 return mam.MAMPrefs()
280
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147
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148 def onPrefsSetRequest(self, prefs, requestor):
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149 """
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150
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151 @param prefs: The new settings to set.
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152 @type prefs: L{wokkel.mam.MAMPrefs}
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153
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154 @param requestor: JID of the requestor.
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155 @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
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156
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157 @return: The settings that have actually been set.
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158 @rtype: L{wokkel.mam.MAMPrefs}
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159 """
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160 # TODO: set the new settings and return them
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161 return mam.MAMPrefs()