Mercurial > libervia-pubsub

annotate idavoll/pubsub.py @ 41:ea3d3544a52e

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Rewrite using separated backend interfaces. The backend also uses a separate class for the actual storage.
author Ralph Meijer <ralphm@ik.nu>
date Sun, 31 Oct 2004 21:11:03 +0000
parents c9ddca3cce20
children 31eb00734cc5
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1 from twisted.protocols.jabber import component,jid
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2 from twisted.xish import utility, domish
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3 from twisted.python import components
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4 from twisted.internet import defer
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5
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6 import backend
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7 import xmpp_error
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8
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9 NS_COMPONENT = 'jabber:component:accept'
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10 NS_PUBSUB = 'http://jabber.org/protocol/pubsub'
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11 NS_PUBSUB_EVENT = NS_PUBSUB + '#event'
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ce3d0db64da1 Implemented basic subscribing.
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12 NS_PUBSUB_ERRORS = NS_PUBSUB + '#errors'
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13
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14 IQ_GET = '/iq[@type="get"]'
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15 IQ_SET = '/iq[@type="set"]'
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16 PUBSUB_ELEMENT = '/pubsub[@xmlns="' + NS_PUBSUB + '"]'
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17 PUBSUB_GET = IQ_GET + PUBSUB_ELEMENT
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18 PUBSUB_SET = IQ_SET + PUBSUB_ELEMENT
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19 PUBSUB_CREATE = PUBSUB_SET + '/create'
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20 PUBSUB_PUBLISH = PUBSUB_SET + '/publish'
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21 PUBSUB_SUBSCRIBE = PUBSUB_SET + '/subscribe'
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22 PUBSUB_UNSUBSCRIBE = PUBSUB_SET + '/unsubscribe'
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23 PUBSUB_OPTIONS_GET = PUBSUB_GET + '/options'
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24 PUBSUB_OPTIONS_SET = PUBSUB_SET + '/options'
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25 PUBSUB_CONFIGURE_GET = PUBSUB_GET + '/configure'
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26 PUBSUB_CONFIGURE_SET = PUBSUB_SET + '/configure'
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28 class Error(Exception):
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29 pubsub_error = None
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30 stanza_error = None
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31 msg = ''
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32
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33 class NotImplemented(Error):
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34 stanza_error = 'feature-not-implemented'
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35
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36 class OptionsUnavailable(Error):
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37 stanza_error = 'feature-not-implemented'
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38 pubsub_error = 'subscription-options-unavailable'
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40 class SubscriptionOptionsUnavailable(Error):
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41 stanza_error = 'not-acceptable'
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42 pubsub_error = 'subscription-options-unavailable'
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43
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44 class NodeNotConfigurable(Error):
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45 stanza_error = 'feature-not-implemented'
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46 pubsub_error = 'node-not-configurable'
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47
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48 class CreateNodeNotConfigurable(Error):
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49 stanza_error = 'not-acceptable'
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50 pubsub_error = 'node-not-configurable'
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51
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52 error_map = {
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53 backend.NotAuthorized: ('not-authorized', None),
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54 backend.NodeNotFound: ('item-not-found', None),
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55 backend.NoPayloadAllowed: ('bad-request', None),
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56 backend.PayloadExpected: ('bad-request', None),
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57 backend.NoInstantNodes: ('not-acceptable', None),
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58 backend.NodeExists: ('conflict', None),
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59 backend.NotImplemented: ('feature-not-implemented', None),
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60 backend.NotSubscribed: ('not-authorized', 'requestor-not-subscribed'),
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61 }
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62
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63 class Service(component.Service):
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64
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65 __implements__ = component.IService
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66
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67 def __init__(self, backend):
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68 self.backend = backend
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69
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70 def error(self, failure, iq):
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71 try:
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72 e = failure.trap(Error, *error_map.keys())
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73
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74 if e == Error:
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75 stanza_error = failure.value.stanza_error
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76 pubsub_error = failure.value.pubsub_error
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77 msg = ''
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78 else:
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79 stanza_error, pubsub_error = error_map[e]
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80 msg = failure.value.msg
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81
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82 xmpp_error.error_from_iq(iq, stanza_error, msg)
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83 if pubsub_error:
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84 iq.error.addElement((NS_PUBSUB_ERRORS, pubsub_error))
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85 return iq
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86 except:
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87 xmpp_error.error_from_iq(iq, 'internal-server-error')
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88 self.send(iq)
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89 raise
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90
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91 def success(self, result, iq):
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92 iq.swapAttributeValues("to", "from")
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93 iq["type"] = 'result'
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94 iq.children = result or []
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95 return iq
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96
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97 def handler_wrapper(self, handler, iq):
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98 try:
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99 d = handler(iq)
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100 except:
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101 d = defer.fail()
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102
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103 d.addCallback(self.success, iq)
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104 d.addErrback(self.error, iq)
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105 d.addCallback(self.send)
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106 iq.handled = True
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107
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108 class ComponentServiceFromService(Service):
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109
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110 def getIdentities(self, node):
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111 results = []
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112 if not node:
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113 results.append({
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114 'category': 'pubsub',
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115 'type': 'generic',
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116 'name': 'Generic Pubsub Service'
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117 })
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118 return results
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119
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120 def getFeatures(self, node):
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121 features = []
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122
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123 affiliations = self.backend.get_supported_affiliations()
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124 if 'outcast' in affiliations:
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125 features.append("http://jabber.org/protocol/pubsub#outcast-affil")
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126
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127 if 'publisher' in affiliations:
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128 features.append("http://jabber.org/protocol/pubsub#publisher-affil")
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129
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130 # "http://jabber.org/protocol/pubsub#persistent-items"
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131
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132 return features
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133
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134 components.registerAdapter(ComponentServiceFromService, backend.IBackendService, component.IService)
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135
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136 class ComponentServiceFromNotificationService(Service):
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137
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138 def componentConnected(self, xmlstream):
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139 self.backend.register_notifier(self.notify)
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140
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141 def notify(self, object):
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142 node_id = object["node_id"]
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143 items = object["items"]
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144 d = self.backend.get_notification_list(node_id, items)
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145 d.addCallback(self._notify, node_id)
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146
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147 def _notify(self, list, node_id):
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148 print list
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149 for recipient, items in list.items():
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150 self._notify_recipient(recipient, node_id, items)
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151
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152 def _notify_recipient(self, recipient, node_id, itemlist):
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153 message = domish.Element((NS_COMPONENT, "message"))
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154 message["from"] = self.parent.jabberId
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155 message["to"] = recipient
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156 event = message.addElement((NS_PUBSUB_EVENT, "event"))
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157 items = event.addElement("items")
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158 items["node"] = node_id
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159 items.children.extend(itemlist)
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160 self.send(message)
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161
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162 components.registerAdapter(ComponentServiceFromNotificationService, backend.INotificationService, component.IService)
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163
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164 class ComponentServiceFromPublishService(Service):
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165
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166 def componentConnected(self, xmlstream):
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167 xmlstream.addObserver(PUBSUB_PUBLISH, self.onPublish)
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168
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169 def onPublish(self, iq):
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170 self.handler_wrapper(self._onPublish, iq)
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171
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172 def _onPublish(self, iq):
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173 node = iq.pubsub.publish["node"]
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174
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175 items = []
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176 for child in iq.pubsub.publish.children:
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177 if child.__class__ == domish.Element and child.name == 'item':
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178 items.append(child)
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179
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180 print items
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181
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182 return self.backend.publish(node, items,
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183 jid.JID(iq["from"]).userhostJID())
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e01bbbfa8a46 Implemented node creation.
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184
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185 components.registerAdapter(ComponentServiceFromPublishService, backend.IPublishService, component.IService)
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186
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187 class ComponentServiceFromSubscriptionService(Service):
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ce3d0db64da1 Implemented basic subscribing.
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188
31
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189 def componentConnected(self, xmlstream):
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190 xmlstream.addObserver(PUBSUB_SUBSCRIBE, self.onSubscribe)
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191 xmlstream.addObserver(PUBSUB_UNSUBSCRIBE, self.onUnsubscribe)
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192 xmlstream.addObserver(PUBSUB_OPTIONS_GET, self.onOptionsGet)
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193 xmlstream.addObserver(PUBSUB_OPTIONS_SET, self.onOptionsSet)
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194
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195 def onSubscribe(self, iq):
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196 self.handler_wrapper(self._onSubscribe, iq)
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197
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198 def _onSubscribe(self, iq):
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199 if iq.pubsub.options:
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200 raise SubscribeOptionsUnavailable
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201
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202 node_id = iq.pubsub.subscribe["node"]
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203 subscriber = jid.JID(iq.pubsub.subscribe["jid"])
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204 requestor = jid.JID(iq["from"]).userhostJID()
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205 d = self.backend.subscribe(node_id, subscriber, requestor)
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206 d.addCallback(self.return_subscription)
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207 return d
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208
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209 def return_subscription(self, result):
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210 reply = domish.Element((NS_PUBSUB, "pubsub"), NS_PUBSUB)
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211 entity = reply.addElement("entity")
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212 entity["node"] = result["node"]
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213 entity["jid"] = result["jid"].full()
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214 entity["affiliation"] = result["affiliation"]
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215 entity["subscription"] = result["subscription"]
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216 return [reply]
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217
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218 def onUnsubscribe(self, iq):
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219 self.handler_wrapper(self._onUnsubscribe, iq)
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220
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221 def _onUnsubscribe(self, iq):
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222 node_id = iq.pubsub.unsubscribe["node"]
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223 subscriber = jid.JID(iq.pubsub.unsubscribe["jid"])
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224 requestor = jid.JID(iq["from"]).userhostJID()
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225 return self.backend.unsubscribe(node_id, subscriber, requestor)
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226
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227 def onOptionsGet(self, iq):
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228 self.handler_wrapper(self._onOptionsGet, iq)
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229
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230 def _onOptionsGet(self, iq):
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231 raise OptionsUnavailable
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232
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233 def onOptionsSet(self, iq):
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234 self.handler_wrapper(self._onOptionsSet, iq)
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235
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236 def _onOptionsSet(self, iq):
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237 raise OptionsUnavailable
23
884268687229 Simplify call chain by mapping incoming requests directly to method
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238
31
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239 components.registerAdapter(ComponentServiceFromSubscriptionService, backend.ISubscriptionService, component.IService)
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240
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241 class ComponentServiceFromNodeCreationService(Service):
23
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242
31
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243 def componentConnected(self, xmlstream):
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244 xmlstream.addObserver(PUBSUB_CREATE, self.onCreate)
38
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245 xmlstream.addObserver(PUBSUB_CONFIGURE_GET, self.onConfigureGet)
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246 xmlstream.addObserver(PUBSUB_CONFIGURE_SET, self.onConfigureSet)
31
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247
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248 def onCreate(self, iq):
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249 self.handler_wrapper(self._onCreate, iq)
23
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diff changeset
250
31
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251 def _onCreate(self, iq):
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252 if iq.pubsub.options:
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253 raise CreateNodeNotConfigurable
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diff changeset
254
31
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255 node = iq.pubsub.create["node"]
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diff changeset
256 owner = jid.JID(iq["from"]).userhostJID()
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diff changeset
257
31
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258 d = self.backend.create_node(node, owner)
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diff changeset
259 d.addCallback(self.return_create_response, iq)
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diff changeset
260 return d
2
9701df89c534 First take at notifications
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parents: 1
diff changeset
261
31
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diff changeset
262 def return_create_response(self, result, iq):
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diff changeset
263 if iq.pubsub.create["node"] is None:
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diff changeset
264 reply = domish.Element('pubsub', NS_PUBSUB)
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diff changeset
265 entity = reply.addElement('create')
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266 entity['node'] = result['node_id']
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diff changeset
267 return reply
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parents: 25
diff changeset
268
38
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diff changeset
269 def onConfigureGet(self, iq):
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diff changeset
270 self.handler_wrapper(self._onConfigureGet, iq)
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diff changeset
271
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diff changeset
272 def _onConfigureGet(self, iq):
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diff changeset
273 raise NodeNotConfigurable
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parents: 31
diff changeset
274
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diff changeset
275 def onConfigureSet(self, iq):
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diff changeset
276 self.handler_wrapper(self._onConfigureSet, iq)
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diff changeset
277
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diff changeset
278 def _onConfigureSet(self, iq):
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diff changeset
279 raise NodeNotConfigurable
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diff changeset
280
31
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diff changeset
281 components.registerAdapter(ComponentServiceFromNodeCreationService, backend.INodeCreationService, component.IService)