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core/modulemanager.lua @ 1231:6f251813f1e5
modulemanager: Added hook(event, handler) to the plugin API
author | Waqas Hussain <waqas20@gmail.com> |
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date | Sat, 30 May 2009 17:35:32 +0500 (2009-05-30) |
parent | 1183:565e16ee0c74 |
child | 1247:4721e4124692 |
rev | line source |
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896 | 1 -- Prosody IM v0.4 |
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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 -- |
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 |
30 | 10 |
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11 local plugin_dir = CFG_PLUGINDIR or "./plugins/"; |
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12 |
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13 local logger = require "util.logger"; |
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14 local log = logger.init("modulemanager"); |
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15 local addDiscoInfoHandler = require "core.discomanager".addDiscoInfoHandler; |
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16 local eventmanager = require "core.eventmanager"; |
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17 local config = require "core.configmanager"; |
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18 local multitable_new = require "util.multitable".new; |
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19 local register_actions = require "core.actions".register; |
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20 local st = require "util.stanza"; |
30 | 21 |
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22 local hosts = hosts; |
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23 |
30 | 24 local loadfile, pcall = loadfile, pcall; |
25 local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv; | |
26 local pairs, ipairs = pairs, ipairs; | |
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27 local t_insert, t_concat = table.insert, table.concat; |
30 | 28 local type = type; |
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29 local next = next; |
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30 local rawget = rawget; |
30 | 31 |
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32 local tostring = tostring; |
30 | 33 |
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34 -- We need this to let modules access the real global namespace |
30 | 35 local _G = _G; |
36 | |
37 module "modulemanager" | |
38 | |
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39 local api = {}; -- Module API container |
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40 |
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41 local modulemap = { ["*"] = {} }; |
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42 |
591 | 43 local stanza_handlers = multitable_new(); |
30 | 44 local handler_info = {}; |
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45 |
30 | 46 local modulehelpers = setmetatable({}, { __index = _G }); |
47 | |
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48 local features_table = multitable_new(); |
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49 local handler_table = multitable_new(); |
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50 local hooked = multitable_new(); |
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51 local event_hooks = multitable_new(); |
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52 |
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53 local NULL = {}; |
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54 |
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55 -- Load modules when a host is activated |
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56 function load_modules_for_host(host) |
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57 if config.get(host, "core", "modules_enable") == false then |
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58 return; -- Only load for hosts, not components, etc. |
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59 end |
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60 |
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61 -- Load modules from global section |
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62 local modules_enabled = config.get("*", "core", "modules_enabled"); |
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63 local modules_disabled = config.get(host, "core", "modules_disabled"); |
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64 local disabled_set = {}; |
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65 if modules_enabled then |
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66 if modules_disabled then |
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67 for _, module in ipairs(modules_disabled) do |
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68 disabled_set[module] = true; |
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69 end |
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70 end |
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71 for _, module in ipairs(modules_enabled) do |
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72 if not disabled_set[module] then |
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73 load(host, module); |
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74 end |
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75 end |
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76 end |
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77 |
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78 -- Load modules from just this host |
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79 local modules_enabled = config.get(host, "core", "modules_enabled"); |
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80 if modules_enabled then |
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81 for _, module in pairs(modules_enabled) do |
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82 if not is_loaded(host, module) then |
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83 load(host, module); |
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84 end |
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85 end |
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86 end |
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87 end |
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88 eventmanager.add_event_hook("host-activated", load_modules_for_host); |
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89 -- |
30 | 90 |
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91 function load(host, module_name, config) |
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92 if not (host and module_name) then |
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93 return nil, "insufficient-parameters"; |
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94 end |
30 | 95 |
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96 if not modulemap[host] then |
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97 modulemap[host] = {}; |
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98 end |
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99 |
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100 if modulemap[host][module_name] then |
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101 log("warn", "%s is already loaded for %s, so not loading again", module_name, host); |
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102 return nil, "module-already-loaded"; |
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103 elseif modulemap["*"][module_name] then |
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104 return nil, "global-module-already-loaded"; |
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105 end |
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106 |
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107 |
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108 local mod, err = loadfile(get_module_filename(module_name)); |
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109 if not mod then |
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110 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil"); |
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111 return nil, err; |
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112 end |
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113 |
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114 local _log = logger.init(host..":"..module_name); |
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115 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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116 |
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117 local pluginenv = setmetatable({ module = api_instance }, { __index = _G }); |
30 | 118 |
119 setfenv(mod, pluginenv); | |
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120 if not hosts[host] then hosts[host] = { type = "component", host = host, connected = false, s2sout = {} }; end |
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121 |
30 | 122 local success, ret = pcall(mod); |
123 if not success then | |
124 log("error", "Error initialising module '%s': %s", name or "nil", ret or "nil"); | |
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125 return nil, ret; |
30 | 126 end |
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127 |
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128 -- Use modified host, if the module set one |
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129 modulemap[api_instance.host][module_name] = pluginenv; |
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130 |
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131 if api_instance.host == "*" and host ~= "*" then |
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132 api_instance:set_global(); |
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133 end |
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134 |
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135 return true; |
30 | 136 end |
137 | |
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138 function get_module(host, name) |
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139 return modulemap[host] and modulemap[host][name]; |
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140 end |
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141 |
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142 function is_loaded(host, name) |
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143 return modulemap[host] and modulemap[host][name] and true; |
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144 end |
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145 |
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146 function unload(host, name, ...) |
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147 local mod = get_module(host, name); |
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148 if not mod then return nil, "module-not-loaded"; end |
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149 |
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150 if module_has_method(mod, "unload") then |
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151 local ok, err = call_module_method(mod, "unload"); |
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152 if (not ok) and err then |
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153 log("warn", "Non-fatal error unloading module '%s' on '%s': %s", name, host, err); |
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154 end |
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155 end |
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156 modulemap[host][name] = nil; |
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157 features_table:remove(host, name); |
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158 local params = handler_table:get(host, name); -- , {module.host, origin_type, tag, xmlns} |
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159 for _, param in pairs(params or NULL) do |
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160 local handlers = stanza_handlers:get(param[1], param[2], param[3], param[4]); |
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161 if handlers then |
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162 handler_info[handlers[1]] = nil; |
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163 stanza_handlers:remove(param[1], param[2], param[3], param[4]); |
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164 end |
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165 end |
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166 event_hooks:remove(host, name); |
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167 return true; |
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168 end |
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169 |
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170 function reload(host, name, ...) |
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171 local mod = get_module(host, name); |
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172 if not mod then return nil, "module-not-loaded"; end |
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173 |
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174 local _mod, err = loadfile(get_module_filename(name)); -- checking for syntax errors |
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175 if not _mod then |
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176 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil"); |
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177 return nil, err; |
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178 end |
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179 |
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180 local saved; |
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181 |
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182 if module_has_method(mod, "save") then |
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183 local ok, ret, err = call_module_method(mod, "save"); |
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184 if ok then |
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185 saved = ret; |
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186 else |
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187 log("warn", "Error saving module '%s:%s' state: %s", host, module, ret); |
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188 if not config.get(host, "core", "force_module_reload") then |
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189 log("warn", "Aborting reload due to error, set force_module_reload to ignore this"); |
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190 return nil, "save-state-failed"; |
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191 else |
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192 log("warn", "Continuing with reload (using the force)"); |
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193 end |
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194 end |
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195 end |
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196 |
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197 unload(host, name, ...); |
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198 local ok, err = load(host, name, ...); |
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199 if ok then |
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200 mod = get_module(host, name); |
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201 if module_has_method(mod, "restore") then |
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202 local ok, err = call_module_method(mod, "restore", saved or {}) |
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203 if (not ok) and err then |
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204 log("warn", "Error restoring module '%s' from '%s': %s", name, host, err); |
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205 end |
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206 end |
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207 return true; |
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208 end |
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209 return ok, err; |
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210 end |
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211 |
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212 function handle_stanza(host, origin, stanza) |
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213 local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type; |
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214 if name == "iq" and xmlns == "jabber:client" then |
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215 if stanza.attr.type == "get" or stanza.attr.type == "set" then |
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216 xmlns = stanza.tags[1].attr.xmlns or "jabber:client"; |
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217 log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns); |
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218 else |
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219 log("debug", "Discarding %s from %s of type: %s", name, origin_type, stanza.attr.type); |
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220 return true; |
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221 end |
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|
222 end |
591 | 223 local handlers = stanza_handlers:get(host, origin_type, name, xmlns); |
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224 if not handlers then handlers = stanza_handlers:get("*", origin_type, name, xmlns); end |
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225 if handlers then |
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226 log("debug", "Passing stanza to mod_%s", handler_info[handlers[1]].name); |
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227 (handlers[1])(origin, stanza); |
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228 return true; |
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229 else |
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230 log("debug", "Unhandled %s stanza: %s; xmlns=%s", origin.type, stanza.name, xmlns); -- we didn't handle it |
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231 if stanza.attr.xmlns == "jabber:client" then |
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232 if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then |
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233 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); |
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234 end |
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|
235 elseif not(name == "features" and xmlns == "http://etherx.jabber.org/streams") then -- FIXME remove check once we handle S2S features |
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|
236 origin:close("unsupported-stanza-type"); |
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237 end |
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238 end |
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239 end |
39
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240 |
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241 function module_has_method(module, method) |
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242 return type(module.module[method]) == "function"; |
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243 end |
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244 |
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245 function call_module_method(module, method, ...) |
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246 if module_has_method(module, method) then |
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247 local f = module.module[method]; |
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248 return pcall(f, ...); |
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249 else |
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250 return false, "no-such-method"; |
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251 end |
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252 end |
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253 |
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254 local _modulepath = { plugin_dir, "mod_", nil, ".lua"}; |
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255 function get_module_filename(name) |
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256 _modulepath[3] = name; |
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257 return t_concat(_modulepath); |
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258 end |
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259 |
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260 ----- API functions exposed to modules ----------- |
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261 -- Must all be in api.* |
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262 |
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263 -- Returns the name of the current module |
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264 function api:get_name() |
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265 return self.name; |
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266 end |
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267 |
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268 -- Returns the host that the current module is serving |
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269 function api:get_host() |
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270 return self.host; |
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271 end |
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272 |
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273 function api:get_host_type() |
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274 return hosts[self.host].type; |
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275 end |
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276 |
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277 function api:set_global() |
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278 self.host = "*"; |
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279 -- Update the logger |
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280 local _log = logger.init("mod_"..self.name); |
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281 self.log = function (self, ...) return _log(...); end; |
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282 self._log = _log; |
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283 end |
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284 |
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285 local function _add_handler(module, origin_type, tag, xmlns, handler) |
591 | 286 local handlers = stanza_handlers:get(module.host, origin_type, tag, xmlns); |
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287 local msg = (tag == "iq") and "namespace" or "payload namespace"; |
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288 if not handlers then |
591 | 289 stanza_handlers:add(module.host, origin_type, tag, xmlns, handler); |
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290 handler_info[handler] = module; |
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291 handler_table:add(module.host, module.name, {module.host, origin_type, tag, xmlns}); |
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292 --module:log("debug", "I now handle tag '%s' [%s] with %s '%s'", tag, origin_type, msg, xmlns); |
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293 else |
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294 module:log("warn", "I wanted to handle tag '%s' [%s] with %s '%s' but mod_%s already handles that", tag, origin_type, msg, xmlns, handler_info[handlers[1]].module.name); |
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295 end |
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296 end |
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297 |
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298 function api:add_handler(origin_type, tag, xmlns, handler) |
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299 if not (origin_type and tag and xmlns and handler) then return false; end |
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300 if type(origin_type) == "table" then |
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301 for _, origin_type in ipairs(origin_type) do |
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302 _add_handler(self, origin_type, tag, xmlns, handler); |
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303 end |
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304 else |
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305 _add_handler(self, origin_type, tag, xmlns, handler); |
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306 end |
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307 end |
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308 function api:add_iq_handler(origin_type, xmlns, handler) |
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309 self:add_handler(origin_type, "iq", xmlns, handler); |
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310 end |
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311 |
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312 addDiscoInfoHandler("*host", function(reply, to, from, node) |
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313 if #node == 0 then |
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314 local done = {}; |
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315 for module, features in pairs(features_table:get(to) or NULL) do -- for each module |
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316 for feature in pairs(features) do |
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317 if not done[feature] then |
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318 reply:tag("feature", {var = feature}):up(); -- TODO cache |
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319 done[feature] = true; |
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320 end |
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321 end |
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322 end |
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323 for module, features in pairs(features_table:get("*") or NULL) do -- for each module |
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324 for feature in pairs(features) do |
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325 if not done[feature] then |
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326 reply:tag("feature", {var = feature}):up(); -- TODO cache |
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327 done[feature] = true; |
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328 end |
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329 end |
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330 end |
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331 return next(done) ~= nil; |
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332 end |
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333 end); |
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334 |
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335 function api:add_feature(xmlns) |
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336 features_table:set(self.host, self.name, xmlns, true); |
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337 end |
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338 |
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339 local event_hook = function(host, mod_name, event_name, ...) |
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340 if type((...)) == "table" and (...).host and (...).host ~= host then return; end |
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341 for handler in pairs(event_hooks:get(host, mod_name, event_name) or NULL) do |
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342 handler(...); |
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343 end |
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344 end; |
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345 function api:add_event_hook(name, handler) |
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346 if not hooked:get(self.host, self.name, name) then |
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347 eventmanager.add_event_hook(name, function(...) event_hook(self.host, self.name, name, ...); end); |
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348 hooked:set(self.host, self.name, name, true); |
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349 end |
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350 event_hooks:set(self.host, self.name, name, handler, true); |
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351 end |
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352 |
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353 function api:fire_event(...) |
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354 return eventmanager.fire_event(...); |
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355 end |
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356 |
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357 function api:hook(event, handler) |
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358 if self.host ~= '*' then |
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359 hosts[self.host].events.add_handler(event, handler); |
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360 else |
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361 self:log("error", "Global module attempting to hook a host-specific event: %s", event); |
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362 end |
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363 end |
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modulemanager: Added hook(event, handler) to the plugin API
Waqas Hussain <waqas20@gmail.com>
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1183
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364 |
438
193f9dd64f17
Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
Matthew Wild <mwild1@gmail.com>
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400
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365 -------------------------------------------------------------------- |
193f9dd64f17
Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
Matthew Wild <mwild1@gmail.com>
parents:
400
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366 |
698
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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367 local actions = {}; |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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changeset
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368 |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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369 function actions.load(params) |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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370 --return true, "Module loaded ("..params.module.." on "..params.host..")"; |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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371 return load(params.host, params.module); |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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372 end |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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changeset
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373 |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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374 function actions.unload(params) |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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375 return unload(params.host, params.module); |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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376 end |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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377 |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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378 register_actions("/modules", actions); |
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
Matthew Wild <mwild1@gmail.com>
parents:
695
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379 |
39
89877d61ac51
Add support for arbitrary events and event hooks
Matthew Wild <mwild1@gmail.com>
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38
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380 return _M; |