prosody
bd1397b1dfc9
core/modulemanager.lua

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core/modulemanager.lua @ 443:bd1397b1dfc9

Merge from waqas
author Matthew Wild <mwild1@gmail.com>
date Thu, 27 Nov 2008 17:12:05 +0000
parent 439:6608ad3a72f3
child 467:66f145f5c932
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3 local logger = require "util.logger";
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4 local log = logger.init("modulemanager")
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6 local loadfile, pcall = loadfile, pcall;
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7 local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv;
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8 local pairs, ipairs = pairs, ipairs;
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9 local t_insert = table.insert;
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10 local type = type;
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12 local tostring, print = tostring, print;
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14 local _G = _G;
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15 local debug = debug;
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17 module "modulemanager"
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19 local api = {}; -- Module API container
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21 local modulemap = {};
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23 local handler_info = {};
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24 local stanza_handlers = {};
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26 local modulehelpers = setmetatable({}, { __index = _G });
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29 function load(host, module_name, config)
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30 if not (host and module_name) then
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31 return nil, "insufficient-parameters";
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32 end
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33 local mod, err = loadfile("plugins/mod_"..module_name..".lua");
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34 if not mod then
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35 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
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36 return nil, err;
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37 end
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39 if not modulemap[host] then
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40 modulemap[host] = {};
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41 stanza_handlers[host] = {};
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42 elseif modulemap[host][module_name] then
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43 log("warn", "%s is already loaded for %s, so not loading again", module_name, host);
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44 return nil, "module-already-loaded";
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45 end
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47 local _log = logger.init(host..":"..module_name);
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48 local api_instance = setmetatable({ name = module_name, host = host, config = config, _log = _log, log = function (self, ...) return _log(...); end }, { __index = api });
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50 local pluginenv = setmetatable({ module = api_instance }, { __index = _G });
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52 setfenv(mod, pluginenv);
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53
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54 local success, ret = pcall(mod);
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55 if not success then
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56 log("error", "Error initialising module '%s': %s", name or "nil", ret or "nil");
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57 return nil, ret;
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58 end
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60 modulemap[host][module_name] = mod;
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62 return true;
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63 end
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65 function is_loaded(host, name)
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66 return modulemap[host] and modulemap[host][name] and true;
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67 end
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69 function unload(host, name, ...)
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70 local mod = modulemap[host] and modulemap[host][name];
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71 if not mod then return nil, "module-not-loaded"; end
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73 if type(mod.unload) == "function" then
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74 local ok, err = pcall(mod.unload, ...)
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75 if (not ok) and err then
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76 log("warn", "Non-fatal error unloading module '%s' from '%s': %s", name, host, err);
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77 end
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78 end
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79
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80 end
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81
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82 function handle_stanza(host, origin, stanza)
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83 local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type;
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85 local handlers = stanza_handlers[host];
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86 if not handlers then
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87 log("warn", "No handlers for %s", host);
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88 return false;
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89 end
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90
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91 if name == "iq" and xmlns == "jabber:client" and handlers[origin_type] then
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92 local child = stanza.tags[1];
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93 if child then
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94 local xmlns = child.attr.xmlns or xmlns;
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95 log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
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96 local handler = handlers[origin_type][name] and handlers[origin_type][name][xmlns];
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97 if handler then
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98 log("debug", "Passing stanza to mod_%s", handler_info[handler].name);
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99 return handler(origin, stanza) or true;
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100 end
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101 end
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102 elseif handlers[origin_type] then
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103 local handler = handlers[origin_type][name];
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104 if handler then
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105 handler = handler[xmlns];
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106 if handler then
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107 log("debug", "Passing stanza to mod_%s", handler_info[handler].name);
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108 return handler(origin, stanza) or true;
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109 end
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110 end
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111 end
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112 log("debug", "Stanza unhandled by any modules, xmlns: %s", stanza.attr.xmlns);
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113 return false; -- we didn't handle it
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114 end
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115
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116 ----- API functions exposed to modules -----------
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117 -- Must all be in api.*
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118
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119 -- Returns the name of the current module
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120 function api:get_name()
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121 return self.name;
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122 end
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123
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124 -- Returns the host that the current module is serving
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125 function api:get_host()
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126 return self.host;
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127 end
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128
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129
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130 local function _add_iq_handler(module, origin_type, xmlns, handler)
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131 local handlers = stanza_handlers[module.host];
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132 handlers[origin_type] = handlers[origin_type] or {};
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133 handlers[origin_type].iq = handlers[origin_type].iq or {};
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134 if not handlers[origin_type].iq[xmlns] then
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135 handlers[origin_type].iq[xmlns]= handler;
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136 handler_info[handler] = module;
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137 module:log("debug", "I now handle tag 'iq' [%s] with payload namespace '%s'", origin_type, xmlns);
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138 else
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139 module:log("warn", "I wanted to handle tag 'iq' [%s] with payload namespace '%s' but mod_%s already handles that", origin_type, xmlns, handler_info[handlers[origin_type].iq[xmlns]].name);
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140 end
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141 end
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142
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143 function api:add_iq_handler(origin_type, xmlns, handler)
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144 if not (origin_type and handler and xmlns) then return false; end
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145 if type(origin_type) == "table" then
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146 for _, origin_type in ipairs(origin_type) do
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147 _add_iq_handler(self, origin_type, xmlns, handler);
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148 end
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149 return;
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150 end
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151 _add_iq_handler(self, origin_type, xmlns, handler);
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152 end
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153
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154
39
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155 do
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156 local event_handlers = {};
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157
438
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158 function api:add_event_hook(name, handler)
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159 if not event_handlers[name] then
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160 event_handlers[name] = {};
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161 end
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162 t_insert(event_handlers[name] , handler);
438
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163 self:log("debug", "Subscribed to %s", name);
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164 end
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165
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166 function fire_event(name, ...)
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167 local event_handlers = event_handlers[name];
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168 if event_handlers then
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169 for name, handler in ipairs(event_handlers) do
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170 handler(...);
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171 end
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172 end
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173 end
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174 end
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175
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176
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177 local function _add_handler(module, origin_type, tag, xmlns, handler)
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178 local handlers = stanza_handlers[module.host];
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179 handlers[origin_type] = handlers[origin_type] or {};
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180 if not handlers[origin_type][tag] then
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181 handlers[origin_type][tag] = handlers[origin_type][tag] or {};
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182 handlers[origin_type][tag][xmlns]= handler;
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183 handler_info[handler] = module;
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184 module:log("debug", "I now handle tag '%s' [%s] with xmlns '%s'", tag, origin_type, xmlns);
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185 elseif handler_info[handlers[origin_type][tag]] then
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186 log("warning", "I wanted to handle tag '%s' [%s] but mod_%s already handles that", tag, origin_type, handler_info[handlers[origin_type][tag]].module.name);
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187 end
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188 end
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189
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190 function api:add_handler(origin_type, tag, xmlns, handler)
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191 if not (origin_type and tag and xmlns and handler) then return false; end
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192 if type(origin_type) == "table" then
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193 for _, origin_type in ipairs(origin_type) do
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194 _add_handler(self, origin_type, tag, xmlns, handler);
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195 end
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196 return;
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197 end
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198 _add_handler(self, origin_type, tag, xmlns, handler);
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199 end
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200
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201 --------------------------------------------------------------------
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202
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203 return _M;