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annotate sat_pubsub/mam.py @ 449:91da42d44ea2

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mam: fix `page_max` calculation, thus `complete` attribute
author Goffi <goffi@goffi.org>
date Thu, 22 Apr 2021 18:26:12 +0200
parents 5e8b8ef5c862
children bcbd2399bfee
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python3
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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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27
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28 from zope.interface import implementer
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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.internet import defer
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33 from twisted.words.protocols.jabber import error
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34
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35 from sat_pubsub import const
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36 from sat_pubsub import backend
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37 from wokkel import pubsub
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38
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39 from wokkel import rsm
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40 from wokkel import mam
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41 from wokkel import delay
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44 @implementer(mam.IMAMResource)
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45 class MAMResource(object):
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46 _errorMap = backend.PubSubResourceFromBackend._errorMap
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47
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48 def __init__(self, backend_):
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49 self.backend = backend_
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50
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51 def _mapErrors(self, failure):
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52 # XXX: come from backend.PubsubResourceFromBackend
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53 e = failure.trap(*list(self._errorMap.keys()))
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55 condition, pubsubCondition, feature = self._errorMap[e]
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56 msg = failure.value.msg
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57
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58 if pubsubCondition:
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59 exc = pubsub.PubSubError(condition, pubsubCondition, feature, msg)
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60 else:
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61 exc = error.StanzaError(condition, text=msg)
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62
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63 raise exc
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64
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65 def onArchiveRequest(self, mam_request):
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66 """
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67
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68 @param mam_request: The MAM archive request.
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69 @type mam_request: L{MAMQueryReques<wokkel.mam.MAMRequest>}
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71 @return: A tuple with list of message data (id, element, data) and RSM element
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72 @rtype: C{tuple}
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73 """
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74 # FIXME: bad result ordering
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75 try:
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76 pep = mam_request.delegated
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77 except AttributeError:
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78 pep = False
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79 ext_data = {'pep': pep}
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80 if mam_request.form:
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81 ext_data['filters'] = list(mam_request.form.fields.values())
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82 if mam_request.rsm is None:
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83 if const.VAL_RSM_MAX_DEFAULT != None:
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84 log.msg("MAM request without RSM limited to {}".format(const.VAL_RSM_MAX_DEFAULT))
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85 ext_data['rsm'] = rsm.RSMRequest(const.VAL_RSM_MAX_DEFAULT)
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86 else:
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87 ext_data['rsm'] = mam_request.rsm
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88
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89 if mam_request.orderBy:
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90 ext_data['order_by'] = mam_request.orderBy
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91
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92 d = defer.ensureDeferred(
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93 self.backend.getItemsData(mam_request.node, mam_request.sender,
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94 mam_request.recipient, None, None, ext_data)
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95 )
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96
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97 def make_message(elt):
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98 # XXX: http://xmpp.org/extensions/xep-0297.html#sect-idp629952 (rule 3)
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99 message = domish.Element((const.NS_CLIENT, "message"))
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100 event = message.addElement((pubsub.NS_PUBSUB_EVENT, "event"))
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101 items = event.addElement('items')
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102 items["node"] = mam_request.node
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103 items.addChild(elt)
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104 return message
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105
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106 def cb(items_data):
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107 msg_data = []
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108 rsm_elt = None
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109 attributes = {}
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110 for item_data in items_data:
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111 if item_data.item.name == 'set' and item_data.item.uri == rsm.NS_RSM:
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112 assert rsm_elt is None
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113 rsm_elt = item_data.item
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114 if rsm_elt.first:
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115 # XXX: we check if it is the last page using initial request data
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116 # and RSM element data. In this case, we must have the
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117 # "complete"
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118 # attribute set to "true".
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119 page_max = int(rsm_elt.first['index']) + mam_request.rsm.max
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120 count = int(str(rsm_elt.count))
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121 if page_max >= count:
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122 # the maximum items which can be displayed is equal to or
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123 # above the total number of items, which means we are complete
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124 attributes['complete'] = "true"
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125 else:
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126 log.msg("WARNING: no <first> element in RSM request: {xml}".format(
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127 xml = rsm_elt.toXml().encode('utf-8')))
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128 elif item_data.item.name == 'item':
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129 msg_data.append([item_data.item['id'], make_message(item_data.item),
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130 item_data.created])
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131 else:
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132 log.msg("WARNING: unknown element: {}".format(item_data.item.name))
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133 if pep:
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134 # we need to send privileged message
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135 # so me manage the sending ourself, and return
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136 # an empty msg_data list to avoid double sending
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137 for data in msg_data:
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138 self.forwardPEPMessage(mam_request, *data)
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139 msg_data = []
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140 return (msg_data, rsm_elt, attributes)
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141
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142 d.addErrback(self._mapErrors)
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143 d.addCallback(cb)
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144 return d
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145
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146 def forwardPEPMessage(self, mam_request, id_, elt, created):
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147 msg = domish.Element((None, 'message'))
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148 msg['from'] = self.backend.privilege.server_jid.full()
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149 msg['to'] = mam_request.sender.full()
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150 result = msg.addElement((mam.NS_MAM, 'result'))
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151 if mam_request.query_id is not None:
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152 result['queryid'] = mam_request.query_id
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153 result['id'] = id_
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154 forward = result.addElement((const.NS_FORWARD, 'forwarded'))
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155 forward.addChild(delay.Delay(created).toElement())
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156 forward.addChild(elt)
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157 self.backend.privilege.sendMessage(msg)
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158
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159 def onPrefsGetRequest(self, requestor):
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160 """
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161
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162 @param requestor: JID of the requestor.
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163 @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
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164
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165 @return: The current settings.
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166 @rtype: L{wokkel.mam.MAMPrefs}
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167 """
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168 # TODO: return the actual current settings
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169 return mam.MAMPrefs()
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170
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171 def onPrefsSetRequest(self, prefs, requestor):
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172 """
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173
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174 @param prefs: The new settings to set.
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175 @type prefs: L{wokkel.mam.MAMPrefs}
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176
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177 @param requestor: JID of the requestor.
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178 @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
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179
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180 @return: The settings that have actually been set.
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181 @rtype: L{wokkel.mam.MAMPrefs}
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182 """
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183 # TODO: set the new settings and return them
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184 return mam.MAMPrefs()