annotate twisted/plugins/pubsub.py @ 468:445a2f67be4a

doc: update following renaming and delegation changes
author Goffi <goffi@goffi.org>
date Fri, 15 Oct 2021 15:54:15 +0200
parents 607616f9ef5b
children b544109ab4c4
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1 #!/usr/bin/env python3
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2
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3 # Copyright (c) 2012-2021 Jérôme Poisson
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4 # Copyright (c) 2003-2011 Ralph Meijer
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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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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
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21 # This program is based on Idavoll (http://idavoll.ik.nu/),
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22 # originaly written by Ralph Meijer (http://ralphm.net/blog/)
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23 # It is sublicensed under AGPL v3 (or any later version) as allowed by the original
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24 # license.
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25
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26 # --
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27
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28 # Here is a copy of the original license:
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29
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30 # Copyright (c) 2003-2011 Ralph Meijer
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31
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32 # Permission is hereby granted, free of charge, to any person obtaining
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33 # a copy of this software and associated documentation files (the
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34 # "Software"), to deal in the Software without restriction, including
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35 # without limitation the rights to use, copy, modify, merge, publish,
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36 # distribute, sublicense, and/or sell copies of the Software, and to
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37 # permit persons to whom the Software is furnished to do so, subject to
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38 # the following conditions:
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39
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40 # The above copyright notice and this permission notice shall be
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41 # included in all copies or substantial portions of the Software.
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42
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43 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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44 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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45 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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46 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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47 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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48 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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49 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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50
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51
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52 import sys
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53 import csv
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54 import os
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55 from os.path import expanduser, realpath
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56 import configparser
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57 from zope.interface import implementer
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58 from twisted.application.service import IServiceMaker
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59 from twisted.application import service
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60 from twisted.python import usage, log
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61 from twisted.plugin import IPlugin
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62 from twisted.words.protocols.jabber.jid import JID
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63 import sat_pubsub
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64 from sat_pubsub import const
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66
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67 def coerceListType(value):
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68 return next(csv.reader(
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69 [value], delimiter=",", quotechar='"', skipinitialspace=True
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70 ))
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73 def coerceJidListType(value):
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74 values = [JID(v) for v in coerceListType(value)]
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75 if any((j.resource for j in values)):
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76 raise ValueError("you must use bare jids")
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77 return values
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78
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79
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80 def coerceJidDomainType(value):
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81 try:
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82 jid_ = JID(value)
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83 except Exception as e:
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84 raise ValueError(f"JID set in configuration ({value!r}) is invalid: {e}")
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85 if jid_.resource or jid_.user:
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86 raise ValueError(
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87 f"JID in configuration ({jid_!r}) must have no local part and no resource"
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88 )
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89 return jid_
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91
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92 OPT_PARAMETERS_BOTH = [
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93 ['jid', None, None, 'JID this component will be available at', coerceJidDomainType],
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94 ['xmpp_pwd', None, None, 'XMPP server component password'],
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95 ['server_jid', None, None, 'jid of the server this component is plugged to',
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96 coerceJidDomainType],
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97 ['rhost', None, '127.0.0.1', 'XMPP server host'],
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98 ['rport', None, '5347', 'XMPP server port'],
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99 ['backend', None, 'pgsql', 'Choice of storage backend'],
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100 ['db_user', None, None, 'Database user (pgsql backend)'],
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101 ['db_name', None, 'pubsub', 'Database name (pgsql backend)'],
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102 ['db_pass', None, None, 'Database password (pgsql backend)'],
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103 ['db_host', None, None, 'Database host (pgsql backend)'],
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104 ['db_port', None, None, 'Database port (pgsql backend)'],
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105 ['service_name', None, const.SERVICE_NAME, 'Name of this Pubsub service'],
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106 ]
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107
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108 OPT_PARAMETERS_CFG = [
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109 ["admins_jids_list", None, [], "List of administrators' bare jids",
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110 coerceJidListType]
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111 ]
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112
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113 # prefix used for environment variables
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114 ENV_PREFIX = "LIBERVIA_PUBSUB_"
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115 # mapping from option name to environment variables to use
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116 # each parameter name links to a list of variable environment name
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117 # if an environment variable of one of the names exists it will be used
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118 # as default value, with priority over config file
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119 ENV_OPT_MAP = {
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120 # we use the same environment variables as PostgreSQL
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121 'db_user': ['PGUSER'],
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122 'db_name': ['PGDATABASE'],
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123 'db_pass': ['PGPASSWORD'],
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124 'db_host': ['PGHOST'],
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125 'db_port': ['PGPORT'],
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126 }
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127 for opt in OPT_PARAMETERS_BOTH + OPT_PARAMETERS_CFG:
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128 name = opt[0]
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129 env_name = f"{ENV_PREFIX}{name.upper()}"
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130 ENV_OPT_MAP.setdefault(name, []).append(env_name)
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131
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132 CONFIG_FILENAME = 'libervia'
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133 # List of the configuration filenames sorted by ascending priority
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134 CONFIG_FILES = (
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135 [realpath(expanduser(path) + CONFIG_FILENAME + '.conf') for path in (
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136 '/etc/', '/etc/{}/'.format(CONFIG_FILENAME),
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137 '~/', '~/.',
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138 '.config/', '.config/.',
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139 '.config/{}/'.format(CONFIG_FILENAME),
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140 '', '.')]
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141 +
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142 # "sat.conf" is the legacy name of the config file
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143 [realpath(expanduser(path) + "sat.conf") for path in (
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144 '/etc/', '/etc/{}/'.format("sat"),
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145 '~/', '~/.',
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146 '.config/', '.config/.',
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147 '.config/{}/'.format("sat"),
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148 '', '.')]
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149 )
369
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150 CONFIG_SECTION = 'pubsub'
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151
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152
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153 class Options(usage.Options):
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154 optParameters = OPT_PARAMETERS_BOTH
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155
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156 optFlags = [
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157 ('verbose', 'v', 'Show traffic'),
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158 ('hide-nodes', None, 'Hide all nodes for disco')
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159 ]
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160
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161 def __init__(self):
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162 """Read Libervia Pubsub configuration file in order to overwrite the hard-coded default values.
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163
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164 Priority for the usage of the values is (from lowest to highest):
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165 - hard-coded default values
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166 - values from SàT configuration files
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167 - values passed on the command line
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168 """
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169 # 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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170 # if the options values are the hard-coded ones or if they have been passed on the command line.
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171
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172 # FIXME: must be refactored + code can be factorised with backend
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173 config_parser = configparser.ConfigParser()
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174 config_parser.read(CONFIG_FILES)
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175 for param in self.optParameters + OPT_PARAMETERS_CFG:
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176 name = param[0]
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177 for env_name in ENV_OPT_MAP[name]:
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178 # we first check if value is set as an environment variable
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179 value = os.getenv(env_name)
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180 if value is not None:
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181 self.setDefaultOption(param, value)
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182 break
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183 else:
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184 # no environment variable set, let's try with configuration
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185 try:
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186 value = config_parser.get(CONFIG_SECTION, name)
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187 self.setDefaultOption(param, value)
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188 except (configparser.NoSectionError, configparser.NoOptionError):
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189 pass
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190 usage.Options.__init__(self)
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191 for opt_data in OPT_PARAMETERS_CFG:
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192 self[opt_data[0]] = opt_data[2]
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193
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194 def setDefaultOption(self, param, value):
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195 """Set default option value using coerce method when needed
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196
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197 If the value is invalid, we quit the program with exit code 1
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198 """
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199 try:
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200 param[2] = param[4](value)
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201 except IndexError: # the coerce method is optional
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202 param[2] = value
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203 except Exception as e:
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204 log.err('Invalid value for setting "{name}": {msg}'.format(
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205 name=name, msg=e))
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206 sys.exit(1)
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207
369
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208 def postOptions(self):
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209 if self['backend'] not in ['pgsql', 'memory']:
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210 raise usage.UsageError("Unknown backend!")
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211 if self['backend'] == 'memory':
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212 raise NotImplementedError('memory backend is not available at the moment')
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213
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214
414
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215 @implementer(IServiceMaker, IPlugin)
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216 class SatPubsubMaker(object):
447
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217 tapname = "libervia-pubsub"
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218 description = "Libervia's Publish-Subscribe Service Component"
369
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219 options = Options
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220
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221 def makeService(self, config):
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412d26a9b2c2 import sat/wokkel modules only when making service:
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222 from wokkel.component import Component
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223 from wokkel.disco import DiscoHandler
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224 from wokkel.generic import FallbackHandler, VersionHandler
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225 from wokkel.iwokkel import IPubSubResource
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226 from wokkel import data_form
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227 from wokkel import pubsub
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228 from wokkel import rsm
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229 from wokkel import mam
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230 from sat_pubsub import mam as pubsub_mam
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231 from sat_pubsub import pubsub_admin
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232 from sat_pubsub.backend import BackendService, ExtraDiscoHandler
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233 from sat_pubsub.privilege import PrivilegesHandler
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234 from sat_pubsub.delegation import DelegationsHandler
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235
369
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236 if not config['jid'] or not config['xmpp_pwd']:
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237 raise usage.UsageError("You must specify jid and xmpp_pwd")
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238 s = service.MultiService()
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239
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240 # Create backend service with storage
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241
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242 if config['backend'] == 'pgsql':
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243 from twisted.enterprise import adbapi
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244 from sat_pubsub.pgsql_storage import Storage
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245 from psycopg2.extras import NamedTupleConnection
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246 keys_map = {
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247 'db_user': 'user',
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248 'db_pass': 'password',
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249 'db_name': 'database',
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250 'db_host': 'host',
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251 'db_port': 'port',
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252 }
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253 kwargs = {}
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254 for config_k, k in keys_map.items():
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255 v = config.get(config_k)
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256 if v is None:
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257 continue
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258 kwargs[k] = v
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259 dbpool = adbapi.ConnectionPool('psycopg2',
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260 cp_reconnect=True,
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261 client_encoding='utf-8',
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262 connection_factory=NamedTupleConnection,
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263 **kwargs
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264 )
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265 st = Storage(dbpool)
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266 elif config['backend'] == 'memory':
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267 raise NotImplementedError('memory backend is not available at the moment')
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268
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e81964db3cd6 administrators entities:
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269 bs = BackendService(st, config)
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270 bs.setName('backend')
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271 bs.setServiceParent(s)
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272
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273 # Set up XMPP server-side component with publish-subscribe capabilities
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274
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275 cs = Component(config["rhost"], int(config["rport"]),
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276 config["jid"].full(), config["xmpp_pwd"])
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277 cs.setName('component')
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278 cs.setServiceParent(s)
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279
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280 cs.factory.maxDelay = 900
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281
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282 if config["verbose"]:
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283 cs.logTraffic = True
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284
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285 FallbackHandler().setHandlerParent(cs)
458
bc2e04a4d3c1 version handler name updated following global renaming
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diff changeset
286 VersionHandler('Libervia Pubsub', sat_pubsub.__version__).setHandlerParent(cs)
369
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287 DiscoHandler().setHandlerParent(cs)
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288
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289 ph = PrivilegesHandler(config['jid'])
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diff changeset
290 ph.setHandlerParent(cs)
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291 bs.privilege = ph
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292
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293 resource = IPubSubResource(bs)
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294 resource.hideNodes = config["hide-nodes"]
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diff changeset
295 resource.serviceJID = config["jid"]
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296
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297 ps = (rsm if const.FLAG_ENABLE_RSM else pubsub).PubSubService(resource)
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298 ps.setHandlerParent(cs)
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299 resource.pubsubService = ps
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300
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301 if const.FLAG_ENABLE_MAM:
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302 mam_resource = pubsub_mam.MAMResource(bs)
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303 mam_s = mam.MAMService(mam_resource)
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304 mam_s.addFilter(data_form.Field(var=const.MAM_FILTER_CATEGORY))
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305 mam_s.addFilter(data_form.Field(var=const.MAM_FILTER_FTS))
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306 mam_s.setHandlerParent(cs)
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307
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308 pa = pubsub_admin.PubsubAdminHandler(bs)
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309 pa.setHandlerParent(cs)
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310
375
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311 # wokkel.pubsub doesn't handle non pubsub# disco
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312 # and we need to announce other feature, so this is a workaround
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313 # to add them
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314 # FIXME: propose a patch upstream to fix this situation
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315 ed = ExtraDiscoHandler()
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316 ed.setHandlerParent(cs)
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317
369
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318 # XXX: delegation must be instancied at the end,
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319 # because it does some MonkeyPatching on handlers
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320 dh = DelegationsHandler()
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321 dh.setHandlerParent(cs)
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322 bs.delegation = dh
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323
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324 return s
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325
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326 serviceMaker = SatPubsubMaker()