prosody
82cfc1ec4a7c
core/configmanager.lua

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core/configmanager.lua @ 2637:82cfc1ec4a7c

configmanager: Error when a component and host clash hostnames
author Matthew Wild <mwild1@gmail.com>
date Sun, 14 Feb 2010 18:41:44 +0000
parent 2552:8dda55217e83
child 2640:2dace3e87dd1
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) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 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 trb = debug.traceback
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17
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18 local eventmanager = require "core.eventmanager";
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19
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20 module "configmanager"
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21
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22 local parsers = {};
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23
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24 local config = { ["*"] = { core = {} } };
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25
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26 local global_config = config["*"];
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27
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28 -- When host not found, use global
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29 setmetatable(config, { __index = function () return global_config; end});
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30 local host_mt = { __index = global_config };
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31
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32 -- When key not found in section, check key in global's section
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33 function section_mt(section_name)
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34 return { __index = function (t, k)
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35 local section = rawget(global_config, section_name);
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36 if not section then return nil; end
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37 return section[k];
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38 end };
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39 end
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40
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41 function getconfig()
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42 return config;
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43 end
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44
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45 function get(host, section, key)
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46 local sec = config[host][section];
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47 if sec then
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48 return sec[key];
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49 end
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50 return nil;
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51 end
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52
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53 function set(host, section, key, value)
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54 if host and section and key then
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55 local hostconfig = rawget(config, host);
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56 if not hostconfig then
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57 hostconfig = rawset(config, host, setmetatable({}, host_mt))[host];
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58 end
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59 if not rawget(hostconfig, section) then
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60 hostconfig[section] = setmetatable({}, section_mt(section));
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61 end
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62 hostconfig[section][key] = value;
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63 return true;
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64 end
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65 return false;
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66 end
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67
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68 function load(filename, format)
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69 format = format or filename:match("%w+$");
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70
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71 if parsers[format] and parsers[format].load then
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72 local f, err = io.open(filename);
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73 if f then
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74 local ok, err = parsers[format].load(f:read("*a"), filename);
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75 f:close();
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76 if ok then
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77 eventmanager.fire_event("config-reloaded", { filename = filename, format = format });
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78 end
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79 return ok, "parser", err;
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80 end
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81 return f, "file", err;
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82 end
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83
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84 if not format then
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85 return nil, "file", "no parser specified";
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86 else
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87 return nil, "file", "no parser for "..(format);
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88 end
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89 end
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90
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91 function save(filename, format)
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92 end
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93
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94 function addparser(format, parser)
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95 if format and parser then
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96 parsers[format] = parser;
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97 end
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98 end
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99
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100 -- _M needed to avoid name clash with local 'parsers'
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101 function _M.parsers()
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102 local p = {};
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103 for format in pairs(parsers) do
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104 table.insert(p, format);
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105 end
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106 return p;
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107 end
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108
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109 -- Built-in Lua parser
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110 do
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111 local loadstring, pcall, setmetatable = _G.loadstring, _G.pcall, _G.setmetatable;
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112 local setfenv, rawget, tostring = _G.setfenv, _G.rawget, _G.tostring;
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113 parsers.lua = {};
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114 function parsers.lua.load(data, filename)
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115 local env;
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116 -- The ' = true' are needed so as not to set off __newindex when we assign the functions below
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117 env = setmetatable({ Host = true; host = true; Component = true, component = true,
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118 Include = true, include = true, RunScript = dofile }, { __index = function (t, k)
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119 return rawget(_G, k) or
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120 function (settings_table)
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121 config[__currenthost or "*"][k] = settings_table;
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122 end;
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123 end,
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124 __newindex = function (t, k, v)
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125 set(env.__currenthost or "*", "core", k, v);
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126 end});
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127
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128 rawset(env, "__currenthost", "*") -- Default is global
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129 function env.Host(name)
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130 if rawget(config, name) and rawget(config[name].core, "component_module") then
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131 error(format("Host %q clashes with previously defined %s Component %q, for services use a sub-domain like conference.%s",
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132 name, config[name].core.component_module:gsub("^%a+$", { component = "external", muc = "MUC"}), name, name), 0);
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133 end
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134 rawset(env, "__currenthost", name);
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135 -- Needs at least one setting to logically exist :)
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136 set(name or "*", "core", "defined", true);
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137 end
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138 env.host = env.Host;
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139
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140 function env.Component(name)
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141 if rawget(config, name) and rawget(config[name].core, "defined") and not rawget(config[name].core, "component_module") then
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142 error(format("Component %q clashes with previously defined Host %q, for services use a sub-domain like conference.%s",
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143 name, name, name), 0);
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144 end
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145 set(name, "core", "component_module", "component");
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146 -- Don't load the global modules by default
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147 set(name, "core", "load_global_modules", false);
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148 rawset(env, "__currenthost", name);
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149
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150 return function (module)
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151 if type(module) == "string" then
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152 set(name, "core", "component_module", module);
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153 end
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154 end
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155 end
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156 env.component = env.Component;
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157
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158 function env.Include(file)
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159 local f, err = io.open(file);
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160 if f then
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161 local data = f:read("*a");
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162 local ok, err = parsers.lua.load(data, file);
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163 if not ok then error(err:gsub("%[string.-%]", file), 0); end
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164 end
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165 if not f then error("Error loading included "..file..": "..err, 0); end
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166 return f, err;
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167 end
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168 env.include = env.Include;
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169
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170 local chunk, err = loadstring(data, "@"..filename);
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171
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172 if not chunk then
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173 return nil, err;
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174 end
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175
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176 setfenv(chunk, env);
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177
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178 local ok, err = pcall(chunk);
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179
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180 if not ok then
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181 return nil, err;
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182 end
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183
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184 return true;
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185 end
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186
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187 end
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188
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189 return _M;