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annotate libervia/backend/tools/config.py @ 4118:07370d2a9bde

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plugin XEP-0167: keep media order when starting a call: media content order is relevant when building Jingle contents/SDP notably for bundling. This patch fixes the previous behaviour of always using the same order by keeping the order of the data (i.e. order of original SDP offer). Previous behaviour could lead to call failure. rel 424
author Goffi <goffi@goffi.org>
date Tue, 03 Oct 2023 15:15:24 +0200
parents 4b842c1fb686
children 0d7bb4df2343
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT: a jabber client
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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6 # Copyright (C) 2013-2016 Adrien Cossa (souliane@mailoo.org)
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7
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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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12
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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 """ Configuration related useful methods """
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22
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23 import os
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24 import csv
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25 import json
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26 from typing import Any
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27 from configparser import ConfigParser, DEFAULTSECT, NoOptionError, NoSectionError
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28 from xdg import BaseDirectory
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29 from libervia.backend.core.log import getLogger
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30 from libervia.backend.core.constants import Const as C
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31 from libervia.backend.core.i18n import _
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32 from libervia.backend.core import exceptions
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33
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34 log = getLogger(__name__)
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35
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36
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37 def fix_config_option(section, option, value, silent=True):
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38 """Force a configuration option value
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39
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40 the option will be written in the first found user config file, a new user
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41 config will be created if none is found.
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42
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43 @param section (str): the config section
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44 @param option (str): the config option
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45 @param value (str): the new value
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46 @param silent (boolean): toggle logging output (must be True when called from sat.sh)
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47 """
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48 config = ConfigParser()
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49 target_file = None
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50 for file_ in C.CONFIG_FILES[::-1]:
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51 # we will eventually update the existing file with the highest priority,
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52 # if it's a user personal file...
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53 if not silent:
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54 log.debug(_("Testing file %s") % file_)
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55 if os.path.isfile(file_):
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56 if file_.startswith(os.path.expanduser("~")):
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57 config.read([file_])
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58 target_file = file_
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59 break
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60 if not target_file:
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61 # ... otherwise we create a new config file for that user
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62 target_file = (
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63 f"{BaseDirectory.save_config_path(C.APP_NAME_FILE)}/{C.APP_NAME_FILE}.conf"
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64 )
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65 if section and section.upper() != DEFAULTSECT and not config.has_section(section):
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66 config.add_section(section)
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67 config.set(section, option, value)
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68 with open(target_file, "wb") as configfile:
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69 config.write(configfile) # for the next time that user launches sat
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70 if not silent:
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71 if option in ("passphrase",): # list here the options storing a password
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72 value = "******"
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73 log.warning(_("Config auto-update: {option} set to {value} in the file "
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74 "{config_file}.").format(option=option, value=value,
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75 config_file=target_file))
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76
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77
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78 def parse_main_conf(log_filenames=False):
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79 """Look for main .ini configuration file, and parse it
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80
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81 @param log_filenames(bool): if True, log filenames of read config files
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82 """
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83 config = ConfigParser(defaults=C.DEFAULT_CONFIG)
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84 try:
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85 filenames = config.read(C.CONFIG_FILES)
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86 except Exception as e:
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87 log.error(_("Can't read main config: {msg}").format(msg=e), exc_info=True)
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88 else:
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89 if log_filenames:
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90 if filenames:
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91 log.info(
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92 _("Configuration was read from: {filenames}").format(
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93 filenames=', '.join(filenames)))
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94 else:
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95 log.warning(
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96 _("No configuration file found, using default settings")
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97 )
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98
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99 return config
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100
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101
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102 def config_get(config, section, name, default=None):
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103 """Get a configuration option
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104
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105 @param config (ConfigParser): the configuration instance
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106 @param section (str): section of the config file (None or '' for DEFAULT)
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107 @param name (str): name of the option
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108 @param default: value to use if not found, or Exception to raise an exception
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109 @return (unicode, list, dict): parsed value
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110 @raise: NoOptionError if option is not present and default is Exception
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111 NoSectionError if section doesn't exists and default is Exception
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112 exceptions.ParsingError error while parsing value
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113 """
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114 if not section:
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115 section = DEFAULTSECT
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116
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117 try:
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118 value = config.get(section, name)
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119 except (NoOptionError, NoSectionError) as e:
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120 if default is Exception:
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121 raise e
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122 return default
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123
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124 if name.endswith("_path") or name.endswith("_dir"):
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125 value = os.path.expanduser(value)
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126 # thx to Brian (http://stackoverflow.com/questions/186857/splitting-a-semicolon-separated-string-to-a-dictionary-in-python/186873#186873)
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127 elif name.endswith("_list"):
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128 value = next(csv.reader(
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129 [value], delimiter=",", quotechar='"', skipinitialspace=True
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130 ))
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131 elif name.endswith("_dict"):
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132 try:
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133 value = json.loads(value)
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134 except ValueError as e:
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135 raise exceptions.ParsingError("Error while parsing data: {}".format(e))
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136 if not isinstance(value, dict):
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137 raise exceptions.ParsingError(
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138 "{name} value is not a dict: {value}".format(name=name, value=value)
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139 )
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140 elif name.endswith("_json"):
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141 try:
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142 value = json.loads(value)
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143 except ValueError as e:
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144 raise exceptions.ParsingError("Error while parsing data: {}".format(e))
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145 return value
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146
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147
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148 def get_conf(
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149 conf: ConfigParser,
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150 prefix: str,
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151 section: str,
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152 name: str,
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153 default: Any
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154 ) -> Any:
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155 """Get configuration value from environment or config file
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156
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157 @param str: prefix to use for the varilable name (see `name` below)
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158 @param section: config section to use
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159 @param name: unsuffixed name.
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160 For environment variable, `LIBERVIA_<prefix>_` will be prefixed (and name
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161 will be set to uppercase).
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162 For config file, `<prefix>_` will be prefixed (and DEFAULT section will be
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163 used).
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164 Environment variable has priority over config values. If Environment variable
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165 is set but empty string, config value will be used.
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166 @param default: default value to use if varilable is set neither in environment,
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167 nor in config
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168 """
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169 # XXX: This is a temporary method until parameters are refactored
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170 value = os.getenv(f"LIBERVIA_{prefix}_{name}".upper())
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171 return value or config_get(conf, section, f"{prefix}_{name}", default)