annotate twisted/plugins/pubsub.py @ 422:c21f31355ab9

configuration: "max_items" option: "max_items" is implemented using a text-single field, as it is done in the XEP-0060 example (there is no real formal description). When changing the node configuration, the max_items can't be set to a number lower than the total number of items in the node (the configuration will then be rejected), this is to avoid accidental deletion of items.
author Goffi <goffi@goffi.org>
date Tue, 10 Mar 2020 11:11:38 +0100
parents 89736353f6be
children 6f8e1c180c83
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1 #!/usr/bin/env python3
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2 #-*- coding: utf-8 -*-
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3
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4 # Copyright (c) 2012-2019 Jérôme Poisson
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5 # Copyright (c) 2003-2011 Ralph Meijer
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8 # This program is free software: you can redistribute it and/or modify
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9 # it under the terms of the GNU Affero General Public License as published by
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10 # the Free Software Foundation, either version 3 of the License, or
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11 # (at your option) any later version.
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13 # This program is distributed in the hope that it will be useful,
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14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 # GNU Affero General Public License for more details.
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17
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18 # You should have received a copy of the GNU Affero General Public License
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19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 # --
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21
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22 # This program is based on Idavoll (http://idavoll.ik.nu/),
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23 # originaly written by Ralph Meijer (http://ralphm.net/blog/)
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24 # It is sublicensed under AGPL v3 (or any later version) as allowed by the original
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25 # license.
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27 # --
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29 # Here is a copy of the original license:
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30
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31 # Copyright (c) 2003-2011 Ralph Meijer
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32
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33 # Permission is hereby granted, free of charge, to any person obtaining
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34 # a copy of this software and associated documentation files (the
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35 # "Software"), to deal in the Software without restriction, including
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36 # without limitation the rights to use, copy, modify, merge, publish,
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37 # distribute, sublicense, and/or sell copies of the Software, and to
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38 # permit persons to whom the Software is furnished to do so, subject to
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39 # the following conditions:
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41 # The above copyright notice and this permission notice shall be
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42 # included in all copies or substantial portions of the Software.
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44 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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45 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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46 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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47 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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48 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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49 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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50 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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53 import sys
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54 import csv
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55 from os.path import expanduser, realpath
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56 import configparser
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57 # patch for Python 3.8 compatibility
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58 from sat_tmp.twisted import install as install_twisted_patches
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59 install_twisted_patches()
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60 from zope.interface import implementer
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61 from twisted.application.service import IServiceMaker
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62 from twisted.application import service
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63 from twisted.python import usage, log
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64 from twisted.plugin import IPlugin
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65 from twisted.words.protocols.jabber.jid import JID
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66 import sat_pubsub
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71 def coerceListType(value):
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72 return next(csv.reader(
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73 [value], delimiter=",", quotechar='"', skipinitialspace=True
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74 ))
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77 def coerceJidListType(value):
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78 values = [JID(v) for v in coerceListType(value)]
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79 if any((j.resource for j in values)):
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80 raise ValueError("you must use bare jids")
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81 return values
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85 OPT_PARAMETERS_BOTH = [
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86 ['jid', None, None, 'JID this component will be available at'],
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87 ['xmpp_pwd', None, None, 'XMPP server component password'],
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88 ['rhost', None, '127.0.0.1', 'XMPP server host'],
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89 ['rport', None, '5347', 'XMPP server port'],
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90 ['backend', None, 'pgsql', 'Choice of storage backend'],
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91 ['db_user', None, None, 'Database user (pgsql backend)'],
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92 ['db_name', None, 'pubsub', 'Database name (pgsql backend)'],
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93 ['db_pass', None, None, 'Database password (pgsql backend)'],
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94 ['db_host', None, None, 'Database host (pgsql backend)'],
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95 ['db_port', None, None, 'Database port (pgsql backend)'],
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96 ]
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97 # here for future use
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98 OPT_PARAMETERS_CFG = [
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99 ["admins_jids_list", None, [], "List of administrators' bare jids",
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100 coerceJidListType]
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101 ]
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102
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103 CONFIG_FILENAME = 'sat'
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104 # List of the configuration filenames sorted by ascending priority
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105 CONFIG_FILES = [realpath(expanduser(path) + CONFIG_FILENAME + '.conf') for path in (
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106 '/etc/', '/etc/{}/'.format(CONFIG_FILENAME),
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107 '~/', '~/.',
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108 '.config/', '.config/.',
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109 '', '.')]
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110 CONFIG_SECTION = 'pubsub'
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111
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112
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113 class Options(usage.Options):
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114 optParameters = OPT_PARAMETERS_BOTH
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115
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116 optFlags = [
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117 ('verbose', 'v', 'Show traffic'),
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118 ('hide-nodes', None, 'Hide all nodes for disco')
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119 ]
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120
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121 def __init__(self):
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122 """Read SàT Pubsub configuration file in order to overwrite the hard-coded default values.
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123
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124 Priority for the usage of the values is (from lowest to highest):
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125 - hard-coded default values
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126 - values from SàT configuration files
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127 - values passed on the command line
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128 """
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129 # If we do it the reading later: after the command line options have been parsed, there's no good way to know
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130 # if the options values are the hard-coded ones or if they have been passed on the command line.
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131
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132 # FIXME: must be refactored + code can be factorised with backend
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133 config_parser = configparser.ConfigParser()
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134 config_parser.read(CONFIG_FILES)
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135 for param in self.optParameters + OPT_PARAMETERS_CFG:
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136 name = param[0]
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137 try:
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138 value = config_parser.get(CONFIG_SECTION, name)
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139 try:
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140 param[2] = param[4](value)
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141 except IndexError: # the coerce method is optional
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142 param[2] = value
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143 except Exception as e:
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144 log.err('Invalid value for setting "{name}": {msg}'.format(
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145 name=name, msg=e))
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146 sys.exit(1)
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147 except (configparser.NoSectionError, configparser.NoOptionError):
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148 pass
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149 usage.Options.__init__(self)
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150 for opt_data in OPT_PARAMETERS_CFG:
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151 self[opt_data[0]] = opt_data[2]
155
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152
369
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153 def postOptions(self):
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154 if self['backend'] not in ['pgsql', 'memory']:
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155 raise usage.UsageError("Unknown backend!")
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156 if self['backend'] == 'memory':
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157 raise NotImplementedError('memory backend is not available at the moment')
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158
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159 self['jid'] = JID(self['jid']) if self['jid'] else None
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160
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161
414
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162 @implementer(IServiceMaker, IPlugin)
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163 class SatPubsubMaker(object):
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164 tapname = "sat-pubsub"
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165 description = "Salut à Toi Publish-Subscribe Service Component"
369
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166 options = Options
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167
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168 def makeService(self, config):
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169 from wokkel.component import Component
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170 from wokkel.disco import DiscoHandler
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171 from wokkel.generic import FallbackHandler, VersionHandler
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172 from wokkel.iwokkel import IPubSubResource
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173 from wokkel import data_form
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174 from wokkel import pubsub
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175 from wokkel import rsm
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176 from wokkel import mam
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177 from sat_pubsub import const
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178 from sat_pubsub import mam as pubsub_mam
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179 from sat_pubsub import pubsub_admin
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180 from sat_pubsub.backend import BackendService, ExtraDiscoHandler
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181 from sat_pubsub.schema import SchemaHandler
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182 from sat_pubsub.privilege import PrivilegesHandler
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183 from sat_pubsub.delegation import DelegationsHandler
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184
369
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185 if not config['jid'] or not config['xmpp_pwd']:
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186 raise usage.UsageError("You must specify jid and xmpp_pwd")
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187 s = service.MultiService()
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188
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189 # Create backend service with storage
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190
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191 if config['backend'] == 'pgsql':
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192 from twisted.enterprise import adbapi
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193 from sat_pubsub.pgsql_storage import Storage
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194 from psycopg2.extras import NamedTupleConnection
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195 keys_map = {
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196 'db_user': 'user',
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197 'db_pass': 'password',
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198 'db_name': 'database',
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199 'db_host': 'host',
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200 'db_port': 'port',
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201 }
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202 kwargs = {}
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203 for config_k, k in keys_map.items():
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204 v = config.get(config_k)
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205 if v is None:
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206 continue
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207 kwargs[k] = v
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208 dbpool = adbapi.ConnectionPool('psycopg2',
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209 cp_reconnect=True,
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210 client_encoding='utf-8',
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211 connection_factory=NamedTupleConnection,
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212 **kwargs
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213 )
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214 st = Storage(dbpool)
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215 elif config['backend'] == 'memory':
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216 raise NotImplementedError('memory backend is not available at the moment')
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217
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218 bs = BackendService(st, config)
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219 bs.setName('backend')
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220 bs.setServiceParent(s)
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221
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222 # Set up XMPP server-side component with publish-subscribe capabilities
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223
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224 cs = Component(config["rhost"], int(config["rport"]),
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225 config["jid"].full(), config["xmpp_pwd"])
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226 cs.setName('component')
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227 cs.setServiceParent(s)
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228
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229 cs.factory.maxDelay = 900
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230
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231 if config["verbose"]:
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232 cs.logTraffic = True
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233
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234 FallbackHandler().setHandlerParent(cs)
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235 VersionHandler('SàT Pubsub', sat_pubsub.__version__).setHandlerParent(cs)
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236 DiscoHandler().setHandlerParent(cs)
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237
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238 ph = PrivilegesHandler(config['jid'])
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239 ph.setHandlerParent(cs)
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240 bs.privilege = ph
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241
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242 resource = IPubSubResource(bs)
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243 resource.hideNodes = config["hide-nodes"]
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244 resource.serviceJID = config["jid"]
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245
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246 ps = (rsm if const.FLAG_ENABLE_RSM else pubsub).PubSubService(resource)
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247 ps.setHandlerParent(cs)
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248 resource.pubsubService = ps
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249
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250 if const.FLAG_ENABLE_MAM:
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251 mam_resource = pubsub_mam.MAMResource(bs)
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252 mam_s = mam.MAMService(mam_resource)
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253 mam_s.addFilter(data_form.Field(var=const.MAM_FILTER_CATEGORY))
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254 mam_s.setHandlerParent(cs)
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255
382
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256 pa = pubsub_admin.PubsubAdminHandler(bs)
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257 pa.setHandlerParent(cs)
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258
369
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259 sh = SchemaHandler()
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260 sh.setHandlerParent(cs)
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261
375
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262 # wokkel.pubsub doesn't handle non pubsub# disco
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263 # and we need to announce other feature, so this is a workaround
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264 # to add them
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265 # FIXME: propose a patch upstream to fix this situation
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266 ed = ExtraDiscoHandler()
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267 ed.setHandlerParent(cs)
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268
369
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269 # XXX: delegation must be instancied at the end,
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270 # because it does some MonkeyPatching on handlers
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271 dh = DelegationsHandler()
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272 dh.setHandlerParent(cs)
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273 bs.delegation = dh
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274
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275 return s
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276
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277 serviceMaker = SatPubsubMaker()