annotate sat/plugins/plugin_exp_pubsub_hook.py @ 2613:9680cd958529

plugin XEP-0045: fixed crash when muc service is not found
author Goffi <goffi@goffi.org>
date Thu, 21 Jun 2018 01:21:44 +0200
parents 26edcf3a30eb
children 56f94936df1e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for Pubsub Hooks
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5 # Copyright (C) 2009-2018 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 import exceptions
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23 from sat.core.log import getLogger
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24 from sat.memory import persistent
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25 from twisted.words.protocols.jabber import jid
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26 from twisted.internet import defer
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27 log = getLogger(__name__)
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28
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29 NS_PUBSUB_HOOK = 'PUBSUB_HOOK'
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30
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31 PLUGIN_INFO = {
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32 C.PI_NAME: "PubSub Hook",
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33 C.PI_IMPORT_NAME: NS_PUBSUB_HOOK,
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34 C.PI_TYPE: "EXP",
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35 C.PI_PROTOCOLS: [],
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36 C.PI_DEPENDENCIES: ["XEP-0060"],
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37 C.PI_MAIN: "PubsubHook",
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38 C.PI_HANDLER: "no",
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39 C.PI_DESCRIPTION: _("""Experimental plugin to launch on action on Pubsub notifications""")
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40 }
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41
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42 # python module
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43 HOOK_TYPE_PYTHON = u'python'
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44 # python file path
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45 HOOK_TYPE_PYTHON_FILE = u'python_file'
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46 # python code directly
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47 HOOK_TYPE_PYTHON_CODE = u'python_code'
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48 HOOK_TYPES = (HOOK_TYPE_PYTHON, HOOK_TYPE_PYTHON_FILE, HOOK_TYPE_PYTHON_CODE)
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49
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50
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51 class PubsubHook(object):
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52
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53 def __init__(self, host):
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54 log.info(_(u"PubSub Hook initialization"))
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55 self.host = host
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56 self.node_hooks = {} # keep track of the number of hooks per node (for all profiles)
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57 host.bridge.addMethod("psHookAdd", ".plugin",
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58 in_sign='ssssbs', out_sign='',
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59 method=self._addHook
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60 )
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61 host.bridge.addMethod("psHookRemove", ".plugin",
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62 in_sign='sssss', out_sign='i',
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63 method=self._removeHook
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64 )
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65 host.bridge.addMethod("psHookList", ".plugin",
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66 in_sign='s', out_sign='aa{ss}',
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67 method=self._listHooks
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68 )
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69
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70 @defer.inlineCallbacks
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71 def profileConnected(self, client):
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72 hooks = client._hooks = persistent.PersistentBinaryDict(NS_PUBSUB_HOOK, client.profile)
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73 client._hooks_temporary = {}
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74 yield hooks.load()
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75 for node in hooks:
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76 self._installNodeManager(client, node)
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77
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78 def profileDisconnected(self, client):
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79 for node in client._hooks:
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80 self._removeNodeManager(client, node)
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81
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82 def _installNodeManager(self, client, node):
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83 if node in self.node_hooks:
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84 log.debug(_(u"node manager already set for {node}").format(node=node))
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85 self.node_hooks[node] += 1
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86 else:
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87 # first hook on this node
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88 self.host.plugins['XEP-0060'].addManagedNode(node, items_cb=self._itemsReceived)
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89 self.node_hooks[node] = 0
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90 log.info(_(u"node manager installed on {node}").format(
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91 node = node))
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92
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93 def _removeNodeManager(self, client, node):
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94 try:
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95 self.node_hooks[node] -= 1
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96 except KeyError:
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97 log.error(_(u"trying to remove a {node} without hook").format(node=node))
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98 else:
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99 if self.node_hooks[node] == 0:
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100 del self.node_hooks[node]
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101 self.host.plugins['XEP-0060'].removeManagedNode(node, self._itemsReceived)
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102 log.debug(_(u"hook removed"))
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103 else:
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104 log.debug(_(u"node still needed for an other hook"))
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105
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106 def installHook(self, client, service, node, hook_type, hook_arg, persistent):
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107 if hook_type not in HOOK_TYPES:
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108 raise exceptions.DataError(_(u'{hook_type} is not handled').format(hook_type=hook_type))
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109 if hook_type != HOOK_TYPE_PYTHON_FILE:
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110 raise NotImplementedError(_(u'{hook_type} hook type not implemented yet').format(hook_type=hook_type))
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111 self._installNodeManager(client, node)
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112 hook_data = {'service': service,
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113 'type': hook_type,
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114 'arg': hook_arg
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115 }
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116
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117 if persistent:
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118 hooks_list = client._hooks.setdefault(node,[])
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119 hooks_list.append(hook_data)
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120 client._hooks.force(node)
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121 else:
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122 hooks_list = client._hooks_temporary.setdefault(node,[])
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123 hooks_list.append(hook_data)
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124
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125 log.info(_(u"{persistent} hook installed on {node} for {profile}").format(
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126 persistent = _(u'persistent') if persistent else _(u'temporary'),
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127 node = node,
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128 profile = client.profile))
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129
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130 def _itemsReceived(self, client, itemsEvent):
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131 node = itemsEvent.nodeIdentifier
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132 for hooks in (client._hooks, client._hooks_temporary):
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133 if node not in hooks:
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134 continue
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135 hooks_list = hooks[node]
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136 for hook_data in hooks_list[:]:
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137 if hook_data['service'] != itemsEvent.sender.userhostJID():
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138 continue
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139 try:
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140 callback = hook_data['callback']
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141 except KeyError:
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142 # first time we get this hook, we create the callback
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143 hook_type = hook_data['type']
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144 try:
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145 if hook_type == HOOK_TYPE_PYTHON_FILE:
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146 hook_globals = {}
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147 execfile(hook_data['arg'], hook_globals)
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148 callback = hook_globals['hook']
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149 else:
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150 raise NotImplementedError(_(u'{hook_type} hook type not implemented yet').format(
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151 hook_type=hook_type))
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152 except Exception as e:
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153 log.warning(_(u"Can't load Pubsub hook at node {node}, it will be removed: {reason}").format(
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154 node=node, reason=e))
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155 hooks_list.remove(hook_data)
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156 continue
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157
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158 for item in itemsEvent.items:
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159 try:
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160 callback(self.host, client, item)
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161 except Exception as e:
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162 log.warning(_(u"Error while running Pubsub hook for node {node}: {msg}").format(
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163 node = node,
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164 msg = e))
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165
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166 def _addHook(self, service, node, hook_type, hook_arg, persistent, profile):
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167 client = self.host.getClient(profile)
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168 service = jid.JID(service) if service else client.jid.userhostJID()
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169 return self.addHook(client, service, unicode(node), unicode(hook_type), unicode(hook_arg), persistent)
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170
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171 def addHook(self, client, service, node, hook_type, hook_arg, persistent):
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172 r"""Add a hook which will be triggered on a pubsub notification
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173
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174 @param service(jid.JID): service of the node
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175 @param node(unicode): Pubsub node
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176 @param hook_type(unicode): type of the hook, one of:
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177 - HOOK_TYPE_PYTHON: a python module (must be in path)
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178 module must have a "hook" method which will be called
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179 - HOOK_TYPE_PYTHON_FILE: a python file
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180 file must have a "hook" method which will be called
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181 - HOOK_TYPE_PYTHON_CODE: direct python code
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182 /!\ Python hooks will be executed in SàT context,
2307
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183 with host, client and item as arguments, it means that:
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184 - they can do whatever they wants, so don't run untrusted hooks
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185 - they MUST NOT BLOCK, they are run in Twisted async environment and blocking would block whole SàT process
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186 - item are domish.Element
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187 @param hook_arg(unicode): argument of the hook, depending on the hook_type
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188 can be a module path, file path, python code
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189 """
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190 assert service is not None
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191 return self.installHook(client, service, node, hook_type, hook_arg, persistent)
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192
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193 def _removeHook(self, service, node, hook_type, hook_arg, profile):
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194 client = self.host.getClient(profile)
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195 service = jid.JID(service) if service else client.jid.userhostJID()
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196 return self.removeHook(client, service, node, hook_type or None, hook_arg or None)
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197
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198 def removeHook(self, client, service, node, hook_type=None, hook_arg=None):
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199 """Remove a persistent or temporaty root
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200
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201 @param service(jid.JID): service of the node
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202 @param node(unicode): Pubsub node
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203 @param hook_type(unicode, None): same as for [addHook]
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204 match all if None
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205 @param hook_arg(unicode, None): same as for [addHook]
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206 match all if None
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207 @return(int): number of hooks removed
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208 """
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209 removed = 0
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210 for hooks in (client._hooks, client._hooks_temporary):
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211 if node in hooks:
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212 for hook_data in hooks[node]:
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213 if (service != hook_data[u'service']
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214 or hook_type is not None and hook_type != hook_data[u'type']
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215 or hook_arg is not None and hook_arg != hook_data[u'arg']):
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216 continue
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217 hooks[node].remove(hook_data)
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218 removed += 1
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219 if not hooks[node]:
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220 # no more hooks, we can remove the node
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221 del hooks[node]
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222 self._removeNodeManager(client, node)
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223 else:
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224 if hooks == client._hooks:
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225 hooks.force(node)
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226 return removed
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227
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228 def _listHooks(self, profile):
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229 hooks_list = self.listHooks(self.host.getClient(profile))
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230 for hook in hooks_list:
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231 hook[u'service'] = hook[u'service'].full()
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232 hook[u'persistent'] = C.boolConst(hook[u'persistent'])
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233 return hooks_list
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234
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235 def listHooks(self, client):
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236 """return list of registered hooks"""
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237 hooks_list = []
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238 for hooks in (client._hooks, client._hooks_temporary):
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239 persistent = hooks is client._hooks
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240 for node, hooks_data in hooks.iteritems():
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241 for hook_data in hooks_data:
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242 hooks_list.append({u'service': hook_data[u'service'],
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243 u'node': node,
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244 u'type': hook_data[u'type'],
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245 u'arg': hook_data[u'arg'],
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246 u'persistent': persistent
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247 })
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248 return hooks_list
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249