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annotate src/pubsub_admin.py @ 403:1dc606612405

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implemented experimental "consistent_publisher" option: /!\ pgsql schema needs to be updated /!\ New "consistent_publisher" option has been implemented to allow node owners + admins to modify an item while preserving the original publisher. This way, original publisher can still edit the item. In addition to `consistent_publisher`, `max_items` has been added to PGQSL schema to prepare for future implementation.
author Goffi <goffi@goffi.org>
date Wed, 12 Jun 2019 21:51:50 +0200
parents 1d2222a91e6b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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 # 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 implements
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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 = u"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 class PubsubAdminHandler(XMPPHandler):
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37 implements(iwokkel.IDisco)
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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=u'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[u'admins_jids_list']
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62 from_jid = jid.JID(iq_elt[u'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, u'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[u'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, u'pubsub'))
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74 publish_elt = next(pubsub_elt.elements(pubsub.NS_PUBSUB, u'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[u'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, u'result')
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86 result_admin_elt = iq_result_elt.addElement((NS_PUBSUB_ADMIN, u'admin'))
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87 result_pubsub_elt = result_admin_elt.addElement((pubsub.NS_PUBSUB, u'pubsub'))
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88 result_publish_elt = result_pubsub_elt.addElement(u'publish')
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89 result_publish_elt[u'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, u'item'):
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93 try:
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94 requestor = jid.JID(item.attributes.pop(u'publisher'))
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95 except Exception as e:
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96 log.msg(u"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 __import__('pudb').set_trace()
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114 self.sendError(iq_elt, u"forbidden")
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115 return
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116 except Exception as e:
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117 self.sendError(iq_elt, u"internal-server-error")
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118 log.msg(u"INTERNAL ERROR: {msg}".format(msg=e))
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119 return
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120
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121 result_item_elt = result_publish_elt.addElement(u'item')
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122 # either the id was given and it is available in item
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123 # either it's a new item, and we can retrieve it from return payload
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124 try:
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125 result_item_elt[u'id'] = item[u'id']
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126 except KeyError:
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127 result_item_elt = payload.publish.item[u'id']
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128
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129 self.xmlstream.send(iq_result_elt)
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130
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131 def getDiscoInfo(self, requestor, service, nodeIdentifier=''):
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132 return [disco.DiscoFeature(NS_PUBSUB_ADMIN)]
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133
77b52dbda89a pubsub_admin: Pubsub Admin experimental protocol first draft:
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134 def getDiscoItems(self, requestor, service, nodeIdentifier=''):
77b52dbda89a pubsub_admin: Pubsub Admin experimental protocol first draft:
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135 return []