prosody
1189a29cd846
core/configmanager.lua

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core/configmanager.lua @ 3011:1189a29cd846

configmanager: Add VirtualHost as an alias for Host (re-applied in trunk due to previous bad merge with 0.7)
author Matthew Wild <mwild1@gmail.com>
date Wed, 14 Apr 2010 12:59:46 +0100
parent 2925:692b3c6c5bd2
child 3012:6d86e26f0923
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
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10
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11 local _G = _G;
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12 local setmetatable, loadfile, pcall, rawget, rawset, io, error, dofile, type, pairs, table, format =
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13 setmetatable, loadfile, pcall, rawget, rawset, io, error, dofile, type, pairs, table, string.format;
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14
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15
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16 local eventmanager = require "core.eventmanager";
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17
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18 module "configmanager"
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19
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20 local parsers = {};
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21
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22 local config = { ["*"] = { core = {} } };
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23
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24 local global_config = config["*"];
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25
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26 -- When host not found, use global
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27 setmetatable(config, { __index = function () return global_config; end});
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28 local host_mt = { __index = global_config };
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29
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30 -- When key not found in section, check key in global's section
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31 function section_mt(section_name)
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32 return { __index = function (t, k)
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33 local section = rawget(global_config, section_name);
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34 if not section then return nil; end
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35 return section[k];
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36 end };
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37 end
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38
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39 function getconfig()
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40 return config;
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41 end
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42
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43 function get(host, section, key)
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44 local sec = config[host][section];
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45 if sec then
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46 return sec[key];
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47 end
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48 return nil;
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49 end
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50
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51 function set(host, section, key, value)
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52 if host and section and key then
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53 local hostconfig = rawget(config, host);
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54 if not hostconfig then
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55 hostconfig = rawset(config, host, setmetatable({}, host_mt))[host];
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56 end
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57 if not rawget(hostconfig, section) then
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58 hostconfig[section] = setmetatable({}, section_mt(section));
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59 end
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60 hostconfig[section][key] = value;
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61 return true;
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62 end
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63 return false;
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64 end
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65
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66 function load(filename, format)
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67 format = format or filename:match("%w+$");
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68
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69 if parsers[format] and parsers[format].load then
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70 local f, err = io.open(filename);
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71 if f then
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72 local ok, err = parsers[format].load(f:read("*a"), filename);
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73 f:close();
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74 if ok then
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75 eventmanager.fire_event("config-reloaded", { filename = filename, format = format });
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76 end
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77 return ok, "parser", err;
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78 end
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79 return f, "file", err;
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80 end
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81
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82 if not format then
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83 return nil, "file", "no parser specified";
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84 else
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85 return nil, "file", "no parser for "..(format);
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86 end
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87 end
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88
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89 function save(filename, format)
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90 end
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91
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92 function addparser(format, parser)
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93 if format and parser then
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94 parsers[format] = parser;
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95 end
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96 end
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97
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98 -- _M needed to avoid name clash with local 'parsers'
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99 function _M.parsers()
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100 local p = {};
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101 for format in pairs(parsers) do
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102 table.insert(p, format);
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103 end
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104 return p;
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105 end
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106
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107 -- Built-in Lua parser
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108 do
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109 local loadstring, pcall, setmetatable = _G.loadstring, _G.pcall, _G.setmetatable;
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110 local setfenv, rawget, tostring = _G.setfenv, _G.rawget, _G.tostring;
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111 parsers.lua = {};
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112 function parsers.lua.load(data, filename)
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113 local env;
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114 -- The ' = true' are needed so as not to set off __newindex when we assign the functions below
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115 env = setmetatable({ Host = true, host = true, VirtualHost = true, Component = true, component = true,
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116 Include = true, include = true, RunScript = dofile }, { __index = function (t, k)
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117 return rawget(_G, k) or
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118 function (settings_table)
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119 config[__currenthost or "*"][k] = settings_table;
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120 end;
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121 end,
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122 __newindex = function (t, k, v)
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123 set(env.__currenthost or "*", "core", k, v);
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124 end});
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125
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126 rawset(env, "__currenthost", "*") -- Default is global
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127 function env.VirtualHost(name)
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128 if rawget(config, name) and rawget(config[name].core, "component_module") then
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129 error(format("Host %q clashes with previously defined %s Component %q, for services use a sub-domain like conference.%s",
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130 name, config[name].core.component_module:gsub("^%a+$", { component = "external", muc = "MUC"}), name, name), 0);
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131 end
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132 rawset(env, "__currenthost", name);
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133 -- Needs at least one setting to logically exist :)
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134 set(name or "*", "core", "defined", true);
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135 end
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136 env.Host, env.host = env.VirtualHost, env.VirtualHost;
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137
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138 function env.Component(name)
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139 if rawget(config, name) and rawget(config[name].core, "defined") and not rawget(config[name].core, "component_module") then
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140 error(format("Component %q clashes with previously defined Host %q, for services use a sub-domain like conference.%s",
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141 name, name, name), 0);
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142 end
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143 set(name, "core", "component_module", "component");
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144 -- Don't load the global modules by default
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145 set(name, "core", "load_global_modules", false);
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146 rawset(env, "__currenthost", name);
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147
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148 return function (module)
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149 if type(module) == "string" then
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150 set(name, "core", "component_module", module);
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151 end
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152 end
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153 end
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154 env.component = env.Component;
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155
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156 function env.Include(file)
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157 local f, err = io.open(file);
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158 if f then
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159 local data = f:read("*a");
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160 local ok, err = parsers.lua.load(data, file);
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161 if not ok then error(err:gsub("%[string.-%]", file), 0); end
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162 end
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163 if not f then error("Error loading included "..file..": "..err, 0); end
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164 return f, err;
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165 end
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166 env.include = env.Include;
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167
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168 local chunk, err = loadstring(data, "@"..filename);
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169
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170 if not chunk then
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171 return nil, err;
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172 end
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173
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174 setfenv(chunk, env);
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175
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176 local ok, err = pcall(chunk);
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177
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178 if not ok then
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179 return nil, err;
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180 end
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181
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182 return true;
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183 end
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184
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185 end
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186
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187 return _M;