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annotate src/plugins/plugin_xep_0060.py @ 1422:be1fccf4854d

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tmp (wokkel): licenses fixes: the licenses headers were wrong, it was fixed: original work from Adrien Cossa is directly under AGPL v3 (with his agreement), work derivated from Wokkel is sublicensed to AGPL v3 as allowed by the original license, to stay consistent with the rest of the code base. Theses files (and only these ones) can be relicensed again to fill Wokkel license if Ralph plan to merge them upstream...
author Goffi <goffi@goffi.org>
date Thu, 23 Apr 2015 10:57:40 +0200
parents 7c0acb966fd6
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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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 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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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 []