Mercurial > libervia-backend

annotate src/plugins/plugin_xep_0060.py @ 1319:781ee3539252 frontends_multi_profiles

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quick frontends(quick app): add a listeners (observer/observable) mechanism to call a callback when a event happen. Implemented an "avatar" event.
author Goffi <goffi@goffi.org>
date Mon, 09 Feb 2015 21:39:51 +0100
parents faa1129559b8
children f71a0fc26886
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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 # SAT plugin for Publish-Subscribe (xep-0060)
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 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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25
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26 from wokkel.compat import IQ
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27 from wokkel import disco, pubsub
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28 from zope.interface import implements
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29 from twisted.internet import defer
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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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43
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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.clients = {}
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62 self.node_cache = Sessions(timeout=60, resettable_timeout=False)
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63
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64 def getHandler(self, profile):
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65 self.clients[profile] = SatPubSubClient(self.host, self)
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66 return self.clients[profile]
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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 @param namespace: NS of the handler (will appear in disco info)
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71 @param callback: method to call when the handler is found
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72 @param profile: profile which manage this handler"""
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73 self.managedNodes.append((node_name, callback))
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74
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75 def __getClientNProfile(self, profile_key, action='do pusbsub'):
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76 """Return a tuple of (client, profile)
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77 raise error when the profile doesn't exists
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78 @param profile_key: as usual :)
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79 @param action: text of action to show in case of error"""
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80 profile = self.host.memory.getProfileName(profile_key)
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81 if not profile:
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82 err_mess = _('Trying to %(action)s with an unknown profile key [%(profile_key)s]') % {
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83 'action': action,
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84 'profile_key': profile_key}
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85 log.error(err_mess)
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86 raise Exception(err_mess)
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87 try:
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88 client = self.clients[profile]
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89 except KeyError:
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90 err_mess = _('INTERNAL ERROR: no handler for required profile')
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91 log.error(err_mess)
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92 raise Exception(err_mess)
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93 return profile, client
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94
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95 def _getDeferredNodeCache(self, session_id, init, profile):
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96 """Manage a node cache with deferred initialisation and concurrent access.
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97
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98 @param session_id (string): node cache session ID
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99 @param init (Deferred): deferred list of strings to initialise the cache.
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100 @param profile (str): %(doc_profile)s
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101 @return: Deferred list[str]
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102 """
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103 if session_id in self.node_cache:
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104 cache = self.node_cache.profileGet(session_id, profile)
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105 if cache['nodes'] is None:
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106 # init is still running
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107 d = defer.Deferred()
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108 cache['waiting'].append(d)
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109 return d
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110 return defer.succeed(cache['nodes'])
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111
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112 cache = {'init': init, 'waiting': [], 'nodes': None}
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113 self.node_cache.newSession(cache, session_id=session_id, profile=profile)
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114
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115 def cb(nodes):
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116 cache['nodes'] = nodes
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117 for d in cache['waiting']:
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118 d.callback(nodes)
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119 return nodes
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120
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121 return init.addCallback(cb)
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122
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123 def listNodes(self, service, nodeIdentifier='', profile=C.PROF_KEY_NONE):
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124 """Retrieve the name of the nodes that are accessible on the target service.
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125
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126 @param service (JID): target service
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127 @param nodeIdentifier (str): the parent node name (leave empty to retrieve first-level nodes)
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128 @param profile (str): %(doc_profile)s
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129 @return: Deferred list[str]
1217
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130 """
1242
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131 session_id = profile + '@found@' + service.userhost()
1261
93bce9e4c9c8 plugin XEP-0060: listNodes should not use SatPubSubClient.getDiscoItems but self.host.getDiscoItems, cf. revs 1217 (318eab3f93f8) and 1259 (633fcd13a7dc)
souliane <souliane@mailoo.org>
parents: 1260
diff changeset
132 d = self.host.getDiscoItems(service, nodeIdentifier, profile_key=profile)
1242
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diff changeset
133 d.addCallback(lambda result: [item.getAttribute('node') for item in result.toElement().children if item.hasAttribute('node')])
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diff changeset
134 return self._getDeferredNodeCache(session_id, d, profile)
1217
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135
1242
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136 def listSubscribedNodes(self, service, nodeIdentifier='', filter_='subscribed', profile=C.PROF_KEY_NONE):
1217
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137 """Retrieve the name of the nodes to which the profile is subscribed on the target service.
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138
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diff changeset
139 @param service (JID): target service
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diff changeset
140 @param nodeIdentifier (str): the parent node name (leave empty to retrieve all subscriptions)
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diff changeset
141 @param filter_ (str): filter the result according to the given subscription type:
1217
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142 - None: do not filter
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143 - 'pending': subscription has been approved yet by the node owner
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diff changeset
144 - 'unconfigured': subscription options have not been configured yet
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diff changeset
145 - 'subscribed': subscription is complete
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146 @param profile (str): %(doc_profile)s
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diff changeset
147 @return: Deferred list[str]
1217
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148 """
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149 session_id = profile + '@subscriptions@' + service.userhost()
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150 d = self.subscriptions(service, nodeIdentifier, profile_key=profile)
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diff changeset
151 d.addCallback(lambda subs: [sub.getAttribute('node') for sub in subs if sub.getAttribute('subscription') == filter_])
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diff changeset
152 return self._getDeferredNodeCache(session_id, d, profile)
1217
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153
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Goffi <goffi@goffi.org>
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diff changeset
154 def publish(self, service, nodeIdentifier, items=None, profile_key=C.PROF_KEY_NONE):
594
e629371a28d3 Fix pep8 support in src/plugins.
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parents: 588
diff changeset
155 profile, client = self.__getClientNProfile(profile_key, 'publish item')
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diff changeset
156 return client.publish(service, nodeIdentifier, items, client.parent.jid)
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3b382fa0ac28 plugin xep-0163: added mood publishing
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parents: 283
diff changeset
157
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1a759096ccbd core: use of Const for profile_key + replaced '@DEFAULT@' default profile_key by '@NONE@'
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diff changeset
158 def getItems(self, service, node, max_items=None, item_ids=None, sub_id=None, profile_key=C.PROF_KEY_NONE):
594
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diff changeset
159 profile, client = self.__getClientNProfile(profile_key, 'get items')
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souliane <souliane@mailoo.org>
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diff changeset
160 return client.items(service, node, max_items, item_ids, sub_id, client.parent.jid)
303
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161
1217
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diff changeset
162 @defer.inlineCallbacks
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163 def getItemsFromMany(self, service, data, max_items=None, item_ids=None, sub_id=None, profile_key=C.PROF_KEY_NONE):
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164 """Massively retrieve pubsub items from many nodes.
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165
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diff changeset
166 @param service (JID): target service.
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diff changeset
167 @param data (dict): dictionnary binding some arbitrary keys to the node identifiers.
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diff changeset
168 @param max_items (int): optional limit on the number of retrieved items *per node*.
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diff changeset
169 @param item_ids (list[str]): identifiers of the items to be retrieved (should not be used).
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170 @param sub_id (str): optional subscription identifier.
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diff changeset
171 @param profile_key (str): %(doc_profile_key)s
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diff changeset
172 @return: dict binding a subset of the keys of data to Deferred instances.
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173 """
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174 profile, client = self.__getClientNProfile(profile_key, 'get items')
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diff changeset
175 found_nodes = yield self.listNodes(service, profile=profile)
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diff changeset
176 d_dict = {}
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diff changeset
177 for publisher, node in data.items():
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diff changeset
178 if node not in found_nodes:
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diff changeset
179 log.debug(u"Skip the items retrieval for [{node}]: node doesn't exist".format(node=node))
1217
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diff changeset
180 continue # avoid pubsub "item-not-found" error
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diff changeset
181 d_dict[publisher] = client.items(service, node, max_items, item_ids, sub_id, client.parent.jid)
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diff changeset
182 defer.returnValue(d_dict)
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183
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Goffi <goffi@goffi.org>
parents: 891
diff changeset
184 def getOptions(self, service, nodeIdentifier, subscriber, subscriptionIdentifier=None, profile_key=C.PROF_KEY_NONE):
594
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parents: 588
diff changeset
185 profile, client = self.__getClientNProfile(profile_key, 'get options')
303
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diff changeset
186 return client.getOptions(service, nodeIdentifier, subscriber, subscriptionIdentifier)
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diff changeset
187
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Goffi <goffi@goffi.org>
parents: 891
diff changeset
188 def setOptions(self, service, nodeIdentifier, subscriber, options, subscriptionIdentifier=None, profile_key=C.PROF_KEY_NONE):
594
e629371a28d3 Fix pep8 support in src/plugins.
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parents: 588
diff changeset
189 profile, client = self.__getClientNProfile(profile_key, 'set options')
303
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parents: 301
diff changeset
190 return client.setOptions(service, nodeIdentifier, subscriber, options, subscriptionIdentifier)
587
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parents: 572
diff changeset
191
916
1a759096ccbd core: use of Const for profile_key + replaced '@DEFAULT@' default profile_key by '@NONE@'
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diff changeset
192 def createNode(self, service, nodeIdentifier, options, profile_key=C.PROF_KEY_NONE):
594
e629371a28d3 Fix pep8 support in src/plugins.
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parents: 588
diff changeset
193 profile, client = self.__getClientNProfile(profile_key, 'create node')
303
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diff changeset
194 return client.createNode(service, nodeIdentifier, options)
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diff changeset
195
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Goffi <goffi@goffi.org>
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diff changeset
196 def deleteNode(self, service, nodeIdentifier, profile_key=C.PROF_KEY_NONE):
594
e629371a28d3 Fix pep8 support in src/plugins.
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parents: 588
diff changeset
197 profile, client = self.__getClientNProfile(profile_key, 'delete node')
303
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parents: 301
diff changeset
198 return client.deleteNode(service, nodeIdentifier)
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
diff changeset
199
916
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Goffi <goffi@goffi.org>
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diff changeset
200 def retractItems(self, service, nodeIdentifier, itemIdentifiers, profile_key=C.PROF_KEY_NONE):
745
812dc38c0094 plugins groupblog (xep-0060, xep-0277): added blog item modification/deletion
souliane <souliane@mailoo.org>
parents: 704
diff changeset
201 profile, client = self.__getClientNProfile(profile_key, 'retract items')
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diff changeset
202 return client.retractItems(service, nodeIdentifier, itemIdentifiers)
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diff changeset
203
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Goffi <goffi@goffi.org>
parents: 891
diff changeset
204 def subscribe(self, service, nodeIdentifier, sub_jid=None, options=None, profile_key=C.PROF_KEY_NONE):
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 588
diff changeset
205 profile, client = self.__getClientNProfile(profile_key, 'subscribe node')
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
diff changeset
206 return client.subscribe(service, nodeIdentifier, sub_jid or client.parent.jid.userhostJID(), options=options)
303
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parents: 301
diff changeset
207
1217
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diff changeset
208 @defer.inlineCallbacks
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diff changeset
209 def subscribeToMany(self, service, nodeIdentifiers, sub_jid=None, options=None, profile_key=C.PROF_KEY_NONE):
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diff changeset
210 """Massively subscribe to many nodes.
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diff changeset
211
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diff changeset
212 @param service (JID): target service.
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diff changeset
213 @param nodeIdentifiers (list): the list of node identifiers to subscribe to.
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diff changeset
214 @param sub_id (str): optional subscription identifier.
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diff changeset
215 @param options (list): optional list of subscription options
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diff changeset
216 @param profile_key (str): %(doc_profile_key)s
1243
b4a264915ea9 plugins groupblogs: fixes the massive retrieval callback (loop variable was misused in a lambda callback)
souliane <souliane@mailoo.org>
parents: 1242
diff changeset
217 @return: list of Deferred instances.
1217
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diff changeset
218 """
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diff changeset
219 profile, client = self.__getClientNProfile(profile_key, 'subscribe nodes')
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diff changeset
220 found_nodes = yield self.listNodes(service, profile=profile)
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diff changeset
221 subscribed_nodes = yield self.listSubscribedNodes(service, profile=profile)
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diff changeset
222 d_list = []
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diff changeset
223 for nodeIdentifier in (set(nodeIdentifiers) - set(subscribed_nodes)):
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diff changeset
224 if nodeIdentifier not in found_nodes:
1290
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parents: 1261
diff changeset
225 log.debug(u"Skip the subscription to [{node}]: node doesn't exist".format(node=nodeIdentifier))
1217
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diff changeset
226 continue # avoid sat-pubsub "SubscriptionExists" error
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diff changeset
227 d_list.append(client.subscribe(service, nodeIdentifier, sub_jid or client.parent.jid.userhostJID(), options=options))
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diff changeset
228 defer.returnValue(d_list)
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diff changeset
229
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diff changeset
230 def subscriptions(self, service, nodeIdentifier='', profile_key=C.PROF_KEY_NONE):
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diff changeset
231 profile, client = self.__getClientNProfile(profile_key, 'retrieve subscriptions')
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diff changeset
232 return client.subscriptions(service, nodeIdentifier)
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diff changeset
233
587
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234
283
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235 class SatPubSubClient(pubsub.PubSubClient):
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236 implements(disco.IDisco)
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237
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238 def __init__(self, host, parent_plugin):
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239 self.host = host
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240 self.parent_plugin = parent_plugin
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241 pubsub.PubSubClient.__init__(self)
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242
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243 def connectionInitialized(self):
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244 pubsub.PubSubClient.connectionInitialized(self)
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245
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246 # FIXME: we have to temporary override this method here just
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247 # to set the attributes itemIdentifiers which is not used
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248 # in pubsub.PubSubClient.items + use the XEP-0059
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249 def items(self, service, nodeIdentifier, maxItems=None, itemIdentifiers=None,
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250 subscriptionIdentifier=None, sender=None):
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251 """
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252 Retrieve previously published items from a publish subscribe node.
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253
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254 @param service: The publish subscribe service that keeps the node.
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255 @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
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256
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257 @param nodeIdentifier: The identifier of the node.
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258 @type nodeIdentifier: C{unicode}
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259
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260 @param maxItems: Optional limit on the number of retrieved items.
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261 @type maxItems: C{int}
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262
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263 @param itemIdentifiers: Identifiers of the items to be retrieved.
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264 @type itemIdentifiers: C{set}
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265
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266 @param subscriptionIdentifier: Optional subscription identifier. In
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267 case the node has been subscribed to multiple times, this narrows
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268 the results to the specific subscription.
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269 @type subscriptionIdentifier: C{unicode}
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270 """
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271 # TODO: add method attributes for RSM: before, after, index
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272 request = PubSubRequest('items', self.host, {'limit': maxItems} if maxItems else {})
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273 request.recipient = service
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274 request.nodeIdentifier = nodeIdentifier
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275 if maxItems:
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276 request.maxItems = str(int(maxItems))
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277 request.subscriptionIdentifier = subscriptionIdentifier
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278 request.sender = sender
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279 request.itemIdentifiers = itemIdentifiers # XXX: this line has been added
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280
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281 def cb(iq):
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282 items = []
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283 for element in iq.pubsub.items.elements():
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284 if element.uri == pubsub.NS_PUBSUB and element.name == 'item':
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285 items.append(element)
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286 # TODO: return (items, self.host.plugins['XEP-0059'].extractMetadata(iq)) ??
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287 return items
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288
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289 d = request.send(self.xmlstream)
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290 d.addCallback(cb)
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291 return d
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292
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293 # FIXME: this should be done in wokkel
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294 def retractItems(self, service, nodeIdentifier, itemIdentifiers, sender=None):
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295 """
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296 Retract items from a publish subscribe node.
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297
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298 @param service: The publish subscribe service to delete the node from.
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299 @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
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300 @param nodeIdentifier: The identifier of the node.
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301 @type nodeIdentifier: C{unicode}
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302 @param itemIdentifiers: Identifiers of the items to be retracted.
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303 @type itemIdentifiers: C{set}
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304 """
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305 request = PubSubRequest('retract')
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306 request.recipient = service
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307 request.nodeIdentifier = nodeIdentifier
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308 request.itemIdentifiers = itemIdentifiers
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309 request.sender = sender
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310 return request.send(self.xmlstream)
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311
283
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312 def itemsReceived(self, event):
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313 if not self.host.trigger.point("PubSubItemsReceived", event, self.parent.profile):
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314 return
283
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315 for node in self.parent_plugin.managedNodes:
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316 if event.nodeIdentifier == node[0]:
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317 node[1](event, self.parent.profile)
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318
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319 def deleteReceived(self, event):
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320 #TODO: manage delete event
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321 log.debug(_(u"Publish node deleted"))
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322
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323 # def purgeReceived(self, event):
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324
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325 @defer.inlineCallbacks
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326 def subscriptions(self, service, nodeIdentifier, sender=None):
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327 """Return the list of subscriptions to the given service and node.
283
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328
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329 @param service: The publish subscribe service to retrieve the subscriptions from.
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330 @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
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331 @param nodeIdentifier: The identifier of the node (leave empty to retrieve all subscriptions).
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332 @type nodeIdentifier: C{unicode}
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333 """
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334 request = PubSubRequest('subscriptions')
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335 request.recipient = service
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336 request.nodeIdentifier = nodeIdentifier
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337 request.sender = sender
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338 iq = yield request.send(self.xmlstream)
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339 defer.returnValue([sub for sub in iq.pubsub.subscriptions.elements() if
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diff changeset
340 (sub.uri == pubsub.NS_PUBSUB and sub.name == 'subscription')])
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341
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342 def getDiscoInfo(self, requestor, service, nodeIdentifier=''):
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343 disco_info = []
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344 self.host.trigger.point("PubSub Disco Info", disco_info, self.parent.profile)
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345 return disco_info
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346
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347 def getDiscoItems(self, requestor, service, nodeIdentifier=''):
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348 return []
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349
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350
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351 class PubSubRequest(pubsub.PubSubRequest):
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352
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353 def __init__(self, verb=None, host=None, page_attrs=None):
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354 """
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355 @param verb (str): the type of pubsub request
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356 @param host (SAT): the SAT instance
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357 @param page_attrs (dict): options for RSM paging:
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358 - limit (int): the maximum number of items in the page
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359 - index (int): the starting index of the requested page
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360 - after (str, int): the element immediately preceding the page
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361 - before (str, int): the element immediately following the page
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362 """
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363 self.verb = verb
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364 self.host = host
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365 self.page_attrs = page_attrs
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366
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367 # FIXME: the redefinition of this wokkel method is the easiest way I found
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368 # to handle RSM. We should find a proper solution, maybe just add in wokkel an
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369 # empty method postProcessMessage, call it before sending and overwrite it here
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370 # instead of overwriting the whole send method.
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371 def send(self, xs):
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372 """
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373 Send this request to its recipient.
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374
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375 This renders all of the relevant parameters for this specific
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376 requests into an L{IQ}, and invoke its C{send} method.
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377 This returns a deferred that fires upon reception of a response. See
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378 L{IQ} for details.
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379
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380 @param xs: The XML stream to send the request on.
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381 @type xs: L{twisted.words.protocols.jabber.xmlstream.XmlStream}
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382 @rtype: L{defer.Deferred}.
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383 """
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384
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385 try:
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386 (self.stanzaType,
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387 childURI,
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388 childName) = self._verbRequestMap[self.verb]
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389 except KeyError:
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390 raise NotImplementedError()
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391
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392 iq = IQ(xs, self.stanzaType)
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393 iq.addElement((childURI, 'pubsub'))
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394 verbElement = iq.pubsub.addElement(childName)
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395
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396 if self.sender:
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397 iq['from'] = self.sender.full()
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398 if self.recipient:
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399 iq['to'] = self.recipient.full()
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400
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401 for parameter in self._parameters[self.verb]:
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402 getattr(self, '_render_%s' % parameter)(verbElement)
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403
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404 # This lines have been added for RSM
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405 if self.host and 'XEP-0059' in self.host.plugins and self.page_attrs:
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406 self.page_attrs['stanza'] = iq
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407 self.host.plugins['XEP-0059'].requestPage(**self.page_attrs)
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408
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409 return iq.send()