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annotate sat_pubsub/pubsub_admin.py @ 451:0e6e176cb572

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pgsql: fix items order: Due to a misinterpretation, items where returned in wrong order when RSM was used. Pubsub vanilla `max_items` is reversing the items order to get last items, but when this attribute is not used (RSM being used or not), the items must be in chronological order. This patch fixes it, so RSM returns oldest items by defaut, and empty `<before/>` must be used to get last page (and thus most recent items). Items are always finally ordered chronologically inside the returned page (default by `update` time, but this can be modified when a specific order is requested). Reference field is also fixed to use `updated` instead of `item_id` when item are ordered by `update`.
author Goffi <goffi@goffi.org>
date Sun, 06 Jun 2021 19:42:57 +0200
parents 412d26a9b2c2
children b544109ab4c4
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) 2019 Jérôme Poisson
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5 #
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10 #
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15 #
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 """
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20 Pubsub Admin experimental protocol implementation
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21
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22 """
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23
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24 from zope.interface import implementer
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25 from twisted.python import log
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26 from twisted.internet import defer
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27 from twisted.words.protocols.jabber import jid, error as jabber_error, xmlstream
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28 from sat_pubsub import error
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29 from wokkel.subprotocols import XMPPHandler
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30 from wokkel import disco, iwokkel, pubsub
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31
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32 NS_PUBSUB_ADMIN = "https://salut-a-toi.org/spec/pubsub_admin:0"
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33 ADMIN_REQUEST = '/iq[@type="set"]/admin[@xmlns="{}"]'.format(NS_PUBSUB_ADMIN)
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34
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35
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36 @implementer(iwokkel.IDisco)
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37 class PubsubAdminHandler(XMPPHandler):
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38
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39 def __init__(self, backend):
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40 super(PubsubAdminHandler, self).__init__()
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41 self.backend = backend
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42
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43 def connectionInitialized(self):
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44 self.xmlstream.addObserver(ADMIN_REQUEST, self.onAdminRequest)
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45
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46 def sendError(self, iq_elt, condition='bad-request'):
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47 stanza_error = jabber_error.StanzaError(condition)
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48 iq_error = stanza_error.toResponse(iq_elt)
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49 self.parent.xmlstream.send(iq_error)
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50
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51 @defer.inlineCallbacks
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52 def onAdminRequest(self, iq_elt):
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53 """Pubsub Admin request received"""
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54 iq_elt.handled = True
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55 try:
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56 pep = bool(iq_elt.delegated)
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57 except AttributeError:
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58 pep = False
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59
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60 # is the sender really an admin?
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61 admins = self.backend.config['admins_jids_list']
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62 from_jid = jid.JID(iq_elt['from'])
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63 if from_jid.userhostJID() not in admins:
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64 log.msg("WARNING: admin request done by non admin entity {from_jid}"
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65 .format(from_jid=from_jid.full()))
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66 self.sendError(iq_elt, 'forbidden')
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67 return
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68
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69 # alright, we can proceed
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70 recipient = jid.JID(iq_elt['to'])
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71 admin_elt = iq_elt.admin
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72 try:
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73 pubsub_elt = next(admin_elt.elements(pubsub.NS_PUBSUB, 'pubsub'))
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74 publish_elt = next(pubsub_elt.elements(pubsub.NS_PUBSUB, 'publish'))
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75 except StopIteration:
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76 self.sendError(iq_elt)
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77 return
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78 try:
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79 node = publish_elt['node']
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80 except KeyError:
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81 self.sendError(iq_elt)
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82 return
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83
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84 # we prepare the result IQ request, we will fill it with item ids
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85 iq_result_elt = xmlstream.toResponse(iq_elt, 'result')
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86 result_admin_elt = iq_result_elt.addElement((NS_PUBSUB_ADMIN, 'admin'))
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87 result_pubsub_elt = result_admin_elt.addElement((pubsub.NS_PUBSUB, 'pubsub'))
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88 result_publish_elt = result_pubsub_elt.addElement('publish')
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89 result_publish_elt['node'] = node
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90
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91 # now we can send the items
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92 for item in publish_elt.elements(pubsub.NS_PUBSUB, 'item'):
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93 try:
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94 requestor = jid.JID(item.attributes.pop('publisher'))
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95 except Exception as e:
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96 log.msg("WARNING: invalid jid in publisher ({requestor}): {msg}"
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97 .format(requestor=requestor, msg=e))
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98 self.sendError(iq_elt)
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99 return
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100 except KeyError:
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101 requestor = from_jid
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102
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103 # we don't use a DeferredList because we want to be sure that
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104 # each request is done in order
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105 try:
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106 payload = yield self.backend.publish(
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107 nodeIdentifier=node,
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108 items=[item],
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109 requestor=requestor,
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110 pep=pep,
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111 recipient=recipient)
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112 except (error.Forbidden, error.ItemForbidden):
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113 self.sendError(iq_elt, "forbidden")
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114 return
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115 except Exception as e:
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116 self.sendError(iq_elt, "internal-server-error")
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117 log.msg("INTERNAL ERROR: {msg}".format(msg=e))
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118 return
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119
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120 result_item_elt = result_publish_elt.addElement('item')
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121 # either the id was given and it is available in item
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122 # either it's a new item, and we can retrieve it from return payload
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123 try:
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124 result_item_elt['id'] = item['id']
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125 except KeyError:
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126 result_item_elt = payload.publish.item['id']
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127
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128 self.xmlstream.send(iq_result_elt)
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129
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130 def getDiscoInfo(self, requestor, service, nodeIdentifier=''):
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131 return [disco.DiscoFeature(NS_PUBSUB_ADMIN)]
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132
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parents:
diff changeset
133 def getDiscoItems(self, requestor, service, nodeIdentifier=''):
77b52dbda89a pubsub_admin: Pubsub Admin experimental protocol first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
134 return []