Mercurial > libervia-backend
annotate src/plugins/plugin_xep_0060.py @ 1451:9b88b19b1ca8
plugins xep-0060, xep-0277: added methods to serialise getItems result (before bridge transmission):
serItemsData is used for normal callbacks, and serItemsDataD for callbacks which return deferred. These methods simplifly the code by making the re-use of getItems more easy.
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Sat, 15 Aug 2015 22:20:56 +0200 |
| parents | 389357fd79ce |
| children | 5116d70ddd1c |
| 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) |
| 1396 | 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 |
| 771 | 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 |
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25 from sat.tools import sat_defer |
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26 |
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27 from twisted.words.protocols.jabber import jid |
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28 from twisted.internet import defer |
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29 from wokkel import disco |
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30 from wokkel import pubsub |
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31 from wokkel import rsm |
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32 from zope.interface import implements |
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33 # from twisted.internet import defer |
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34 import uuid |
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35 |
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36 UNSPECIFIED = "unspecified error" |
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37 |
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38 |
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39 PLUGIN_INFO = { |
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40 "name": "Publish-Subscribe", |
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41 "import_name": "XEP-0060", |
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42 "type": "XEP", |
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43 "protocols": ["XEP-0060"], |
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44 "dependencies": [], |
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45 "recommendations": ["XEP-0059"], |
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46 "main": "XEP_0060", |
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47 "handler": "yes", |
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48 "description": _("""Implementation of PubSub Protocol""") |
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49 } |
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50 |
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51 |
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52 class XEP_0060(object): |
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53 OPT_ACCESS_MODEL = 'pubsub#access_model' |
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54 OPT_PERSIST_ITEMS = 'pubsub#persist_items' |
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55 OPT_MAX_ITEMS = 'pubsub#max_items' |
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56 OPT_DELIVER_PAYLOADS = 'pubsub#deliver_payloads' |
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57 OPT_SEND_ITEM_SUBSCRIBE = 'pubsub#send_item_subscribe' |
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58 OPT_NODE_TYPE = 'pubsub#node_type' |
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59 OPT_SUBSCRIPTION_TYPE = 'pubsub#subscription_type' |
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60 OPT_SUBSCRIPTION_DEPTH = 'pubsub#subscription_depth' |
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61 OPT_ROSTER_GROUPS_ALLOWED = 'pubsub#roster_groups_allowed' |
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62 OPT_PUBLISH_MODEL = 'pubsub#publish_model' |
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63 |
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64 def __init__(self, host): |
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65 log.info(_(u"PubSub plugin initialization")) |
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66 self.host = host |
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67 self.managedNodes = [] |
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68 self.rt_sessions = sat_defer.RTDeferredSessions() |
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69 host.bridge.addMethod("subscribeToMany", ".plugin", in_sign='a(ss)sa{ss}s', out_sign='s', method=self._subscribeToMany) |
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70 host.bridge.addMethod("getSubscribeRTResult", ".plugin", in_sign='ss', out_sign='(ua(sss))', method=self._manySubscribeRTResult, async=True) |
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71 |
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72 def getHandler(self, profile): |
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73 client = self.host.getClient(profile) |
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74 client.pubsub_client = SatPubSubClient(self.host, self) |
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75 return client.pubsub_client |
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76 |
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77 def addManagedNode(self, node_name, callback): |
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78 """Add a handler for a namespace |
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79 |
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80 @param namespace: NS of the handler (will appear in disco info) |
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81 @param callback: method to call when the handler is found |
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82 @param profile: profile which manage this handler""" |
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83 self.managedNodes.append((node_name, callback)) |
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84 |
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85 # def listNodes(self, service, nodeIdentifier='', profile=C.PROF_KEY_NONE): |
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86 # """Retrieve the name of the nodes that are accessible on the target service. |
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87 |
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88 # @param service (JID): target service |
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89 # @param nodeIdentifier (str): the parent node name (leave empty to retrieve first-level nodes) |
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90 # @param profile (str): %(doc_profile)s |
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91 # @return: deferred which fire a list of nodes |
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92 # """ |
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93 # d = self.host.getDiscoItems(service, nodeIdentifier, profile_key=profile) |
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94 # d.addCallback(lambda result: [item.getAttribute('node') for item in result.toElement().children if item.hasAttribute('node')]) |
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95 # return d |
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96 |
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97 # def listSubscribedNodes(self, service, nodeIdentifier='', filter_='subscribed', profile=C.PROF_KEY_NONE): |
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98 # """Retrieve the name of the nodes to which the profile is subscribed on the target service. |
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99 |
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100 # @param service (JID): target service |
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101 # @param nodeIdentifier (str): the parent node name (leave empty to retrieve all subscriptions) |
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102 # @param filter_ (str): filter the result according to the given subscription type: |
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103 # - None: do not filter |
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104 # - 'pending': subscription has not been approved yet by the node owner |
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105 # - 'unconfigured': subscription options have not been configured yet |
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106 # - 'subscribed': subscription is complete |
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107 # @param profile (str): %(doc_profile)s |
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108 # @return: Deferred list[str] |
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109 # """ |
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110 # d = self.subscriptions(service, nodeIdentifier, profile_key=profile) |
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111 # d.addCallback(lambda subs: [sub.getAttribute('node') for sub in subs if sub.getAttribute('subscription') == filter_]) |
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112 # return d |
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113 |
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114 def publish(self, service, nodeIdentifier, items=None, profile_key=C.PROF_KEY_NONE): |
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115 client = self.host.getClient(profile_key) |
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116 return client.pubsub_client.publish(service, nodeIdentifier, items, client.pubsub_client.parent.jid) |
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117 |
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118 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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119 """Retrieve pubsub items from a node. |
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120 |
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121 @param service (JID): target service. |
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122 @param node (str): node id. |
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123 @param max_items (int): optional limit on the number of retrieved items. |
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124 @param item_ids (list[str]): identifiers of the items to be retrieved (can't be used with rsm). |
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125 @param sub_id (str): optional subscription identifier. |
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126 @param rsm (dict): RSM request data |
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127 @param profile_key (str): %(doc_profile_key)s |
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128 @return: a deferred couple (list[dict], dict) containing: |
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129 - list of items |
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130 - metadata with the following keys: |
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131 - rsm_first, rsm_last, rsm_count, rsm_index: first, last, count and index value of RSMResponse |
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132 """ |
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133 if rsm and item_ids: |
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134 raise ValueError("items_id can't be used with rsm") |
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135 client = self.host.getClient(profile_key) |
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136 ext_data = {'id': unicode(uuid.uuid4()), 'rsm': rsm} if rsm else None |
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137 d = client.pubsub_client.items(service, node, max_items, item_ids, sub_id, client.pubsub_client.parent.jid, ext_data) |
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138 def addMetadata(items): |
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139 if not rsm: |
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140 metadata = {} |
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141 else: |
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142 rsm_data = client.pubsub_client.getRSMResponse(ext_data['id']) |
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143 metadata = {'rsm_{}'.format(key): value for key, value in rsm_data} |
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144 return (items, metadata) |
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145 |
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146 d.addCallback(addMetadata) |
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147 return d |
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148 |
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149 # @defer.inlineCallbacks |
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150 # def getItemsFromMany(self, service, data, max_items=None, sub_id=None, rsm=None, profile_key=C.PROF_KEY_NONE): |
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151 # """Massively retrieve pubsub items from many nodes. |
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152 |
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153 # @param service (JID): target service. |
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154 # @param data (dict): dictionnary binding some arbitrary keys to the node identifiers. |
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155 # @param max_items (int): optional limit on the number of retrieved items *per node*. |
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156 # @param sub_id (str): optional subscription identifier. |
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157 # @param rsm (dict): RSM request data |
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158 # @param profile_key (str): %(doc_profile_key)s |
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159 # @return: a deferred dict with: |
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160 # - key: a value in (a subset of) data.keys() |
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161 # - couple (list[dict], dict) containing: |
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162 # - list of items |
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163 # - RSM response data |
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164 # """ |
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165 # client = self.host.getClient(profile_key) |
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166 # found_nodes = yield self.listNodes(service, profile=client.profile) |
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167 # d_dict = {} |
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168 # for publisher, node in data.items(): |
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169 # if node not in found_nodes: |
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170 # log.debug(u"Skip the items retrieval for [{node}]: node doesn't exist".format(node=node)) |
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171 # continue # avoid pubsub "item-not-found" error |
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172 # d_dict[publisher] = self.getItems(service, node, max_items, None, sub_id, rsm, client.profile) |
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173 # defer.returnValue(d_dict) |
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174 |
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175 def getOptions(self, service, nodeIdentifier, subscriber, subscriptionIdentifier=None, profile_key=C.PROF_KEY_NONE): |
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176 client = self.host.getClient(profile_key) |
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177 return client.pubsub_client.getOptions(service, nodeIdentifier, subscriber, subscriptionIdentifier) |
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178 |
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179 def setOptions(self, service, nodeIdentifier, subscriber, options, subscriptionIdentifier=None, profile_key=C.PROF_KEY_NONE): |
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180 client = self.host.getClient(profile_key) |
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181 return client.pubsub_client.setOptions(service, nodeIdentifier, subscriber, options, subscriptionIdentifier) |
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182 |
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183 def createNode(self, service, nodeIdentifier, options, profile_key=C.PROF_KEY_NONE): |
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184 client = self.host.getClient(profile_key) |
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185 return client.pubsub_client.createNode(service, nodeIdentifier, options) |
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186 |
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187 def deleteNode(self, service, nodeIdentifier, profile_key=C.PROF_KEY_NONE): |
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188 client = self.host.getClient(profile_key) |
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189 return client.pubsub_client.deleteNode(service, nodeIdentifier) |
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190 |
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191 def retractItems(self, service, nodeIdentifier, itemIdentifiers, profile_key=C.PROF_KEY_NONE): |
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192 client = self.host.getClient(profile_key) |
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193 return client.pubsub_client.retractItems(service, nodeIdentifier, itemIdentifiers) |
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194 |
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195 def subscribe(self, service, nodeIdentifier, sub_jid=None, options=None, profile_key=C.PROF_KEY_NONE): |
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196 client = self.host.getClient(profile_key) |
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197 return client.pubsub_client.subscribe(service, nodeIdentifier, sub_jid or client.pubsub_client.parent.jid.userhostJID(), options=options) |
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198 |
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199 def subscriptions(self, service, nodeIdentifier='', profile_key=C.PROF_KEY_NONE): |
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200 client = self.host.getClient(profile_key) |
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201 return client.pubsub_client.subscriptions(service, nodeIdentifier) |
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202 |
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203 ## methods to manage several stanzas/jids at once ## |
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204 |
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205 def serItemsData(self, items_data, item_cb=lambda item: item.toXml()): |
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206 """Helper method to serialise result from [getItems] |
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207 |
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208 the items_data must be a tuple(list[domish.Element], dict[unicode, unicode]) |
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209 as returned by [getItems]. metadata values are then casted to unicode and |
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210 each item is passed to items_cb |
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211 @param items_data(tuple): tuple returned by [getItems] |
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212 @param item_cb(callable): method to transform each item |
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213 @return (tuple): a serialised form ready to go throught bridge |
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214 """ |
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215 items, metadata = items_data |
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216 return [item_cb(item) for item in items], {key: unicode(value) for key, value in metadata.iteritems()} |
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217 |
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218 def serItemsDataD(self, items_data, item_cb): |
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219 """Helper method to serialise result from [getItems], deferred version |
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220 |
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221 the items_data must be a tuple(list[domish.Element], dict[unicode, unicode]) |
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222 as returned by [getItems]. metadata values are then casted to unicode and |
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223 each item is passed to items_cb |
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224 An errback is added to item_cb, and when it is fired the value is filtered from final items |
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225 @param items_data(tuple): tuple returned by [getItems] |
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226 @param item_cb(callable): method to transform each item (must return a deferred) |
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227 @return (tuple): a deferred which fire a serialised form ready to go throught bridge |
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228 """ |
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229 items, metadata = items_data |
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230 def eb(failure): |
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231 log.warning("Error while serialising/parsing item: {}".format(unicode(failure.value))) |
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232 d = defer.gatherResults([item_cb(item).addErrback(eb) for item in items]) |
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233 def finishSerialisation(serialised_items): |
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234 return [item for item in serialised_items if item is not None], {key: unicode(value) for key, value in metadata.iteritems()} |
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235 d.addCallback(finishSerialisation) |
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236 return d |
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237 |
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238 def serDList(self, results, failure_result=None): |
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239 """Serialise a DeferredList result |
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240 |
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241 @param results: DeferredList results |
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242 @param failure_result: value to use as value for failed Deferred |
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243 (default: empty tuple) |
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244 @return (list): list with: |
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245 - failure: empty in case of success, else error message |
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246 - result |
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247 """ |
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248 if failure_result is None: |
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249 failure_result = () |
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250 return [('', result) if success else (unicode(result.result) or UNSPECIFIED, failure_result) for success, result in results] |
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251 |
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252 # subscribe # |
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253 |
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254 def _manySubscribeRTResult(self, session_id, profile_key=C.PROF_KEY_DEFAULT): |
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255 """Get real-time results for subcribeToManu session |
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256 |
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257 @param session_id: id of the real-time deferred session |
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258 @param return (tuple): (remaining, results) where: |
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259 - remaining is the number of still expected results |
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260 - results is a list of tuple(unicode, unicode, bool, unicode) with: |
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261 - service: pubsub service |
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262 - and node: pubsub node |
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263 - failure(unicode): empty string in case of success, error message else |
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264 @param profile_key: %(doc_profile_key)s |
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265 """ |
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266 profile = self.host.getClient(profile_key).profile |
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267 d = self.rt_sessions.getResults(session_id, on_success=lambda result:'', on_error=lambda failure:unicode(failure.value), profile=profile) |
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268 # we need to convert jid.JID to unicode with full() to serialise it for the bridge |
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269 d.addCallback(lambda ret: (ret[0], [(service.full(), node, '' if success else failure or UNSPECIFIED) |
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270 for (service, node), (success, failure) in ret[1].iteritems()])) |
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271 return d |
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272 |
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273 def _subscribeToMany(self, node_data, subscriber=None, options=None, profile_key=C.PROF_KEY_NONE): |
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274 return self.subscribeToMany([(jid.JID(service), unicode(node)) for service, node in node_data], jid.JID(subscriber), options, profile_key) |
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275 |
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276 def subscribeToMany(self, node_data, subscriber, options=None, profile_key=C.PROF_KEY_NONE): |
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277 """Subscribe to several nodes at once. |
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278 |
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279 @param node_data (iterable[tuple]): iterable of tuple (service, node) where: |
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280 - service (jid.JID) is the pubsub service |
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281 - node (unicode) is the node to subscribe to |
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282 @param subscriber (jid.JID): optional subscription identifier. |
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283 @param options (dict): subscription options |
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284 @param profile_key (str): %(doc_profile_key)s |
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285 @return (str): RT Deferred session id |
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286 """ |
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287 client = self.host.getClient(profile_key) |
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288 deferreds = {} |
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289 for service, node in node_data: |
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290 deferreds[(service, node)] = client.pubsub_client.subscribe(service, node, subscriber, options=options) |
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291 return self.rt_sessions.newSession(deferreds, client.profile) |
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292 # found_nodes = yield self.listNodes(service, profile=client.profile) |
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293 # subscribed_nodes = yield self.listSubscribedNodes(service, profile=client.profile) |
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294 # d_list = [] |
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295 # for nodeIdentifier in (set(nodeIdentifiers) - set(subscribed_nodes)): |
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296 # if nodeIdentifier not in found_nodes: |
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297 # log.debug(u"Skip the subscription to [{node}]: node doesn't exist".format(node=nodeIdentifier)) |
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298 # continue # avoid sat-pubsub "SubscriptionExists" error |
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299 # d_list.append(client.pubsub_client.subscribe(service, nodeIdentifier, sub_jid or client.pubsub_client.parent.jid.userhostJID(), options=options)) |
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300 # defer.returnValue(d_list) |
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301 |
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302 |
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303 class SatPubSubClient(rsm.PubSubClient): |
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304 implements(disco.IDisco) |
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305 |
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306 def __init__(self, host, parent_plugin): |
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307 self.host = host |
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308 self.parent_plugin = parent_plugin |
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309 rsm.PubSubClient.__init__(self) |
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310 |
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311 def connectionInitialized(self): |
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312 rsm.PubSubClient.connectionInitialized(self) |
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313 |
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314 def itemsReceived(self, event): |
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315 if not self.host.trigger.point("PubSubItemsReceived", event, self.parent.profile): |
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316 return |
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317 for node in self.parent_plugin.managedNodes: |
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318 if event.nodeIdentifier == node[0]: |
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319 node[1](event, self.parent.profile) |
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320 |
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321 def deleteReceived(self, event): |
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322 #TODO: manage delete event |
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323 log.debug(_(u"Publish node deleted")) |
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324 |
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325 # def purgeReceived(self, event): |
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326 |
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327 def subscriptions(self, service, nodeIdentifier, sender=None): |
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328 """Return the list of subscriptions to the given service and node. |
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329 |
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330 @param service: The publish subscribe service to retrieve the subscriptions from. |
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331 @type service: L{JID<twisted.words.protocols.jabber.jid.JID>} |
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332 @param nodeIdentifier: The identifier of the node (leave empty to retrieve all subscriptions). |
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333 @type nodeIdentifier: C{unicode} |
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334 """ |
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335 request = pubsub.PubSubRequest('subscriptions') |
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336 request.recipient = service |
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337 request.nodeIdentifier = nodeIdentifier |
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338 request.sender = sender |
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339 d = request.send(self.xmlstream) |
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340 |
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341 def cb(iq): |
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342 # FIXME: to be checked |
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343 return [sub for sub in iq.pubsub.subscriptions.elements() if |
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344 (sub.uri == pubsub.NS_PUBSUB and sub.name == 'subscription')] |
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345 |
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346 return d.addCallback(cb) |
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347 |
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348 def getDiscoInfo(self, requestor, service, nodeIdentifier=''): |
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349 disco_info = [] |
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350 self.host.trigger.point("PubSub Disco Info", disco_info, self.parent.profile) |
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351 return disco_info |
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352 |
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353 def getDiscoItems(self, requestor, service, nodeIdentifier=''): |
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354 return [] |