Thu, 20 May 2010 10:46:08 +0100
net.dns: Remove redundant locals declaration
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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 | -- |
758 | 5 | -- This project is MIT/X11 licensed. Please see the |
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; |