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annotate sat_pubsub/pubsub_admin.py @ 414:ccb2a22ea0fc

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Python 3 port: /!\ Python 3.6+ is now needed to use SàT Pubsub /!\ instability may occur and features may not be working anymore, this will improve with time The same procedure as in backend has been applied (check backend commit ab2696e34d29 logs for details). Python minimal version has been updated in setup.py
author Goffi <goffi@goffi.org>
date Fri, 16 Aug 2019 12:53:33 +0200
parents c56a728412f1
children 412d26a9b2c2
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 __import__('pudb').set_trace()
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114 self.sendError(iq_elt, "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, "internal-server-error")
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118 log.msg("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('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['id'] = item['id']
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126 except KeyError:
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127 result_item_elt = payload.publish.item['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
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134 def getDiscoItems(self, requestor, service, nodeIdentifier=''):
77b52dbda89a pubsub_admin: Pubsub Admin experimental protocol first draft:
Goffi <goffi@goffi.org>
parents:
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135 return []