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annotate src/plugins/plugin_xep_0060.py @ 1420:7c0acb966fd6

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plugins groupblog, xep-0060: first pass of simplification
author Goffi <goffi@goffi.org>
date Wed, 22 Apr 2015 20:21:55 +0200
parents 069ad98b360d
children e8c8e467964b
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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 # SAT plugin for Publish-Subscribe (xep-0060)
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Jérôme Poisson (goffi@goffi.org)
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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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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 from sat.core.i18n import _
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21 from sat.core.constants import Const as C
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22 from sat.core.log import getLogger
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23 log = getLogger(__name__)
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24 from sat.memory.memory import Sessions
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26 from wokkel import disco, pubsub, rsm
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27 from zope.interface import implements
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28 from twisted.internet import defer
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29 import uuid
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31
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32 PLUGIN_INFO = {
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33 "name": "Publish-Subscribe",
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34 "import_name": "XEP-0060",
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35 "type": "XEP",
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36 "protocols": ["XEP-0060"],
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37 "dependencies": [],
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38 "recommendations": ["XEP-0059"],
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39 "main": "XEP_0060",
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40 "handler": "yes",
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41 "description": _("""Implementation of PubSub Protocol""")
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42 }
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44
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45 class XEP_0060(object):
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46 OPT_ACCESS_MODEL = 'pubsub#access_model'
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47 OPT_PERSIST_ITEMS = 'pubsub#persist_items'
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48 OPT_MAX_ITEMS = 'pubsub#max_items'
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49 OPT_DELIVER_PAYLOADS = 'pubsub#deliver_payloads'
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50 OPT_SEND_ITEM_SUBSCRIBE = 'pubsub#send_item_subscribe'
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51 OPT_NODE_TYPE = 'pubsub#node_type'
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52 OPT_SUBSCRIPTION_TYPE = 'pubsub#subscription_type'
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53 OPT_SUBSCRIPTION_DEPTH = 'pubsub#subscription_depth'
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54 OPT_ROSTER_GROUPS_ALLOWED = 'pubsub#roster_groups_allowed'
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55 OPT_PUBLISH_MODEL = 'pubsub#publish_model'
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56
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57 def __init__(self, host):
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58 log.info(_(u"PubSub plugin initialization"))
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59 self.host = host
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60 self.managedNodes = []
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61 self.node_cache = Sessions(timeout=60, resettable_timeout=False)
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63 def getHandler(self, profile):
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64 client = self.host.getClient(profile)
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65 client.pubsub_client = SatPubSubClient(self.host, self)
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66 return client.pubsub_client
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67
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68 def addManagedNode(self, node_name, callback):
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69 """Add a handler for a namespace
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70
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71 @param namespace: NS of the handler (will appear in disco info)
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72 @param callback: method to call when the handler is found
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73 @param profile: profile which manage this handler"""
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74 self.managedNodes.append((node_name, callback))
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75
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76 def _getDeferredNodeCache(self, session_id, init, profile):
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77 """Manage a node cache with deferred initialisation and concurrent access.
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78
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79 @param session_id (string): node cache session ID
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80 @param init (Deferred): deferred list of strings to initialise the cache.
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81 @param profile (str): %(doc_profile)s
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82 @return: Deferred list[str]
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83 """
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84 if session_id in self.node_cache:
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85 cache = self.node_cache.profileGet(session_id, profile)
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86 if cache['nodes'] is None:
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87 # init is still running
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88 d = defer.Deferred()
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89 cache['waiting'].append(d)
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90 return d
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91 return defer.succeed(cache['nodes'])
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92
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93 cache = {'init': init, 'waiting': [], 'nodes': None}
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94 self.node_cache.newSession(cache, session_id=session_id, profile=profile)
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95
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96 def cb(nodes):
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97 cache['nodes'] = nodes
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98 for d in cache['waiting']:
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99 d.callback(nodes)
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100 return nodes
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101
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102 return init.addCallback(cb)
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103
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104 def listNodes(self, service, nodeIdentifier='', profile=C.PROF_KEY_NONE):
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105 """Retrieve the name of the nodes that are accessible on the target service.
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106
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107 @param service (JID): target service
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108 @param nodeIdentifier (str): the parent node name (leave empty to retrieve first-level nodes)
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109 @param profile (str): %(doc_profile)s
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110 @return: Deferred list[str]
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111 """
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112 session_id = profile + '@found@' + service.userhost()
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113 d = self.host.getDiscoItems(service, nodeIdentifier, profile_key=profile)
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114 d.addCallback(lambda result: [item.getAttribute('node') for item in result.toElement().children if item.hasAttribute('node')])
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115 return self._getDeferredNodeCache(session_id, d, profile)
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116
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117 def listSubscribedNodes(self, service, nodeIdentifier='', filter_='subscribed', profile=C.PROF_KEY_NONE):
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118 """Retrieve the name of the nodes to which the profile is subscribed on the target service.
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119
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120 @param service (JID): target service
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121 @param nodeIdentifier (str): the parent node name (leave empty to retrieve all subscriptions)
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122 @param filter_ (str): filter the result according to the given subscription type:
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123 - None: do not filter
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124 - 'pending': subscription has not been approved yet by the node owner
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125 - 'unconfigured': subscription options have not been configured yet
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126 - 'subscribed': subscription is complete
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127 @param profile (str): %(doc_profile)s
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128 @return: Deferred list[str]
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129 """
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130 session_id = profile + '@subscriptions@' + service.userhost()
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131 d = self.subscriptions(service, nodeIdentifier, profile_key=profile)
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132 d.addCallback(lambda subs: [sub.getAttribute('node') for sub in subs if sub.getAttribute('subscription') == filter_])
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133 return self._getDeferredNodeCache(session_id, d, profile)
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134
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135 def publish(self, service, nodeIdentifier, items=None, profile_key=C.PROF_KEY_NONE):
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136 client = self.host.getClient(profile_key)
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137 return client.pubsub_client.publish(service, nodeIdentifier, items, client.pubsub_client.parent.jid)
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138
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139 def getItems(self, service, node, max_items=None, item_ids=None, sub_id=None, rsm=None, profile_key=C.PROF_KEY_NONE):
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140 """Retrieve pubsub items from a node.
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141
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142 @param service (JID): target service.
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143 @param node (str): node id.
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144 @param max_items (int): optional limit on the number of retrieved items.
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145 @param item_ids (list[str]): identifiers of the items to be retrieved (should not be used).
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146 @param sub_id (str): optional subscription identifier.
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147 @param rsm (dict): RSM request data
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148 @param profile_key (str): %(doc_profile_key)s
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149 @return: a deferred couple (list[dict], dict) containing:
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150 - list of items
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151 - RSM response data
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152 """
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153 client = self.host.getClient(profile_key)
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154 ext_data = {'id': unicode(uuid.uuid4()), 'rsm': rsm} if rsm else None
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155 d = client.pubsub_client.items(service, node, max_items, item_ids, sub_id, client.pubsub_client.parent.jid, ext_data)
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156 d.addCallback(lambda items: (items, client.pubsub_client.getRSMResponse(ext_data['id']) if rsm else {}))
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157 return d
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158
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159 @defer.inlineCallbacks
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160 def getItemsFromMany(self, service, data, max_items=None, sub_id=None, rsm=None, profile_key=C.PROF_KEY_NONE):
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161 """Massively retrieve pubsub items from many nodes.
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162
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163 @param service (JID): target service.
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164 @param data (dict): dictionnary binding some arbitrary keys to the node identifiers.
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165 @param max_items (int): optional limit on the number of retrieved items *per node*.
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166 @param sub_id (str): optional subscription identifier.
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167 @param rsm (dict): RSM request data
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168 @param profile_key (str): %(doc_profile_key)s
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169 @return: a deferred dict with:
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170 - key: a value in (a subset of) data.keys()
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171 - couple (list[dict], dict) containing:
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172 - list of items
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173 - RSM response data
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174 """
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175 client = self.host.getClient(profile_key)
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176 found_nodes = yield self.listNodes(service, profile=client.profile)
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177 d_dict = {}
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178 for publisher, node in data.items():
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179 if node not in found_nodes:
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180 log.debug(u"Skip the items retrieval for [{node}]: node doesn't exist".format(node=node))
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181 continue # avoid pubsub "item-not-found" error
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182 d_dict[publisher] = self.getItems(service, node, max_items, None, sub_id, rsm, client.profile)
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183 defer.returnValue(d_dict)
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184
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185 def getOptions(self, service, nodeIdentifier, subscriber, subscriptionIdentifier=None, profile_key=C.PROF_KEY_NONE):
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186 client = self.host.getClient(profile_key)
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187 return client.pubsub_client.getOptions(service, nodeIdentifier, subscriber, subscriptionIdentifier)
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188
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189 def setOptions(self, service, nodeIdentifier, subscriber, options, subscriptionIdentifier=None, profile_key=C.PROF_KEY_NONE):
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190 client = self.host.getClient(profile_key)
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191 return client.pubsub_client.setOptions(service, nodeIdentifier, subscriber, options, subscriptionIdentifier)
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192
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193 def createNode(self, service, nodeIdentifier, options, profile_key=C.PROF_KEY_NONE):
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194 client = self.host.getClient(profile_key)
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195 return client.pubsub_client.createNode(service, nodeIdentifier, options)
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196
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197 def deleteNode(self, service, nodeIdentifier, profile_key=C.PROF_KEY_NONE):
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198 client = self.host.getClient(profile_key)
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199 return client.pubsub_client.deleteNode(service, nodeIdentifier)
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200
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201 def retractItems(self, service, nodeIdentifier, itemIdentifiers, profile_key=C.PROF_KEY_NONE):
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202 client = self.host.getClient(profile_key)
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203 return client.pubsub_client.retractItems(service, nodeIdentifier, itemIdentifiers)
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204
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205 def subscribe(self, service, nodeIdentifier, sub_jid=None, options=None, profile_key=C.PROF_KEY_NONE):
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206 client = self.host.getClient(profile_key)
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207 return client.pubsub_client.subscribe(service, nodeIdentifier, sub_jid or client.pubsub_client.parent.jid.userhostJID(), options=options)
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208
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209 @defer.inlineCallbacks
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210 def subscribeToMany(self, service, nodeIdentifiers, sub_jid=None, options=None, profile_key=C.PROF_KEY_NONE):
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211 """Massively subscribe to many nodes.
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212
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213 @param service (JID): target service.
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214 @param nodeIdentifiers (list): the list of node identifiers to subscribe to.
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215 @param sub_id (str): optional subscription identifier.
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216 @param options (list): optional list of subscription options
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217 @param profile_key (str): %(doc_profile_key)s
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218 @return: list of Deferred instances.
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219 """
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220 client = self.host.getClient(profile_key)
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221 found_nodes = yield self.listNodes(service, profile=client.profile)
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222 subscribed_nodes = yield self.listSubscribedNodes(service, profile=client.profile)
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223 d_list = []
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224 for nodeIdentifier in (set(nodeIdentifiers) - set(subscribed_nodes)):
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225 if nodeIdentifier not in found_nodes:
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226 log.debug(u"Skip the subscription to [{node}]: node doesn't exist".format(node=nodeIdentifier))
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227 continue # avoid sat-pubsub "SubscriptionExists" error
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228 d_list.append(client.pubsub_client.subscribe(service, nodeIdentifier, sub_jid or client.pubsub_client.parent.jid.userhostJID(), options=options))
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229 defer.returnValue(d_list)
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230
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231 def subscriptions(self, service, nodeIdentifier='', profile_key=C.PROF_KEY_NONE):
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232 client = self.host.getClient(profile_key)
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233 return client.pubsub_client.subscriptions(service, nodeIdentifier)
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234
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235
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236 class SatPubSubClient(rsm.PubSubClient):
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237 implements(disco.IDisco)
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238
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239 def __init__(self, host, parent_plugin):
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240 self.host = host
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241 self.parent_plugin = parent_plugin
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242 rsm.PubSubClient.__init__(self)
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243
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244 def connectionInitialized(self):
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245 rsm.PubSubClient.connectionInitialized(self)
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246
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247 def itemsReceived(self, event):
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248 if not self.host.trigger.point("PubSubItemsReceived", event, self.parent.profile):
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249 return
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250 for node in self.parent_plugin.managedNodes:
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251 if event.nodeIdentifier == node[0]:
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252 node[1](event, self.parent.profile)
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253
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254 def deleteReceived(self, event):
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255 #TODO: manage delete event
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256 log.debug(_(u"Publish node deleted"))
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257
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258 # def purgeReceived(self, event):
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259
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260 def subscriptions(self, service, nodeIdentifier, sender=None):
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261 """Return the list of subscriptions to the given service and node.
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262
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263 @param service: The publish subscribe service to retrieve the subscriptions from.
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264 @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
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265 @param nodeIdentifier: The identifier of the node (leave empty to retrieve all subscriptions).
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266 @type nodeIdentifier: C{unicode}
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267 """
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268 request = pubsub.PubSubRequest('subscriptions')
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269 request.recipient = service
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270 request.nodeIdentifier = nodeIdentifier
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271 request.sender = sender
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272 d = request.send(self.xmlstream)
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273
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274 def cb(iq):
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275 return [sub for sub in iq.pubsub.subscriptions.elements() if
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276 (sub.uri == pubsub.NS_PUBSUB and sub.name == 'subscription')]
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277
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278 return d.addCallback(cb)
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279
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280 def getDiscoInfo(self, requestor, service, nodeIdentifier=''):
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281 disco_info = []
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282 self.host.trigger.point("PubSub Disco Info", disco_info, self.parent.profile)
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283 return disco_info
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284
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285 def getDiscoItems(self, requestor, service, nodeIdentifier=''):
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286 return []