prosody
917a5ffb73f1
core/portmanager.lua

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core/portmanager.lua @ 4726:917a5ffb73f1

net.http.server: Correctly cache results of handler indexing, and also cache failures
author Matthew Wild <mwild1@gmail.com>
date Fri, 27 Apr 2012 20:00:06 +0100
parent 4687:bd3a852b949a
child 4741:0653476ac3a3
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1
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2 local multitable = require "util.multitable";
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3 local fire_event = prosody.events.fire_event;
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4
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5 --- Config
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6
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7 local default_interfaces = { "*" };
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8 local default_local_interfaces = { "127.0.0.1" };
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9 if config.get("*", "use_ipv6") then
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10 table.insert(default_interfaces, "::");
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11 table.insert(default_local_interfaces, "::1");
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12 end
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13
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14 --- Private state
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15
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16 -- service_name -> { service_info, ... }
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17 local services = setmetatable({}, { __index = function (t, k) rawset(t, k, {}); return rawget(t, k); end });
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18
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19 -- service_name, interface (string), port (number)
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20 local active_services = multitable.new();
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21
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22 --- Private helpers
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23
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24 local function error_to_friendly_message(service_name, port, err)
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25 local friendly_message = err;
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26 if err:match(" in use") then
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27 -- FIXME: Use service_name here
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28 if port == 5222 or port == 5223 or port == 5269 then
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29 friendly_message = "check that Prosody or another XMPP server is "
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30 .."not already running and using this port";
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31 elseif port == 80 or port == 81 then
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32 friendly_message = "check that a HTTP server is not already using "
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33 .."this port";
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34 elseif port == 5280 then
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35 friendly_message = "check that Prosody or a BOSH connection manager "
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36 .."is not already running";
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37 else
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38 friendly_message = "this port is in use by another application";
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39 end
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40 elseif err:match("permission") then
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41 friendly_message = "Prosody does not have sufficient privileges to use this port";
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42 elseif err == "no ssl context" then
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43 if not config.get("*", "core", "ssl") then
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44 friendly_message = "there is no 'ssl' config under Host \"*\" which is "
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45 .."require for legacy SSL ports";
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46 else
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47 friendly_message = "initializing SSL support failed, see previous log entries";
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48 end
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49 end
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50 return friendly_message;
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51 end
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52
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53 module("portmanager", package.seeall);
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54
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55 prosody.events.add_handler("item-added/net-provider", function (event)
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56 local item = event.item;
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57 register_service(item.name, item);
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58 end);
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59 prosody.events.add_handler("item-removed/net-provider", function (event)
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60 local item = event.item;
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61 unregister_service(item.name, item);
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62 end);
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63
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64 --- Public API
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65
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66 function activate_service(service_name)
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67 local service_info = services[service_name][1];
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68 if not service_info then
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69 return nil, "Unknown service: "..service_name;
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70 end
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71
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72 local listener = service_info.listener;
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73
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74 local config_prefix = (service_info.config_prefix or service_name).."_";
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75 if config_prefix == "_" then
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76 config_prefix = "";
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77 end
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78
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79 local bind_interfaces = config.get("*", config_prefix.."interfaces")
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80 or config.get("*", config_prefix.."interface") -- COMPAT w/pre-0.9
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81 or (service_info.private and default_local_interfaces)
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82 or config.get("*", "interfaces")
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83 or config.get("*", "interface") -- COMPAT w/pre-0.9
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84 or listener.default_interface -- COMPAT w/pre0.9
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85 or default_interfaces
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86 bind_interfaces = set.new(type(bind_interfaces)~="table" and {bind_interfaces} or bind_interfaces);
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87
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88 local bind_ports = set.new(config.get("*", config_prefix.."ports")
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89 or service_info.default_ports
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90 or {service_info.default_port
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91 or listener.default_port -- COMPAT w/pre-0.9
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92 });
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93
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94 local mode = listener.default_mode or "*a";
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95 local ssl;
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96 if service_info.encryption == "ssl" then
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97 ssl = prosody.global_ssl_ctx;
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98 if not ssl then
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99 return nil, "global-ssl-context-required";
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100 end
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101 end
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102
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103 for interface in bind_interfaces do
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104 for port in bind_ports do
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105 if #active_services:search(nil, interface, port) > 0 then
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106 log("error", "Multiple services configured to listen on the same port ([%s]:%d): %s, %s", interface, port, active_services:search(nil, interface, port)[1][1].service.name or "<unnamed>", service_name or "<unnamed>");
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107 else
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108 local handler, err = server.addserver(interface, port, listener, mode, ssl);
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109 if not handler then
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110 log("error", "Failed to open server port %d on %s, %s", port, interface, error_to_friendly_message(service_name, port, err));
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111 else
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112 log("debug", "Added listening service %s to [%s]:%d", service_name, interface, port);
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113 active_services:add(service_name, interface, port, {
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114 server = handler;
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115 service = service_info;
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116 });
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117 end
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118 end
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119 end
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120 end
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121 log("info", "Activated service '%s'", service_name);
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122 return true;
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123 end
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124
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125 function deactivate(service_name)
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126 local active = active_services:search(service_name)[1];
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127 if not active then return; end
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128 for interface, ports in pairs(active) do
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129 for port, active_service in pairs(ports) do
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130 close(interface, port);
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131 end
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132 end
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133 log("info", "Deactivated service '%s'", service_name);
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134 end
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135
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136 function register_service(service_name, service_info)
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137 table.insert(services[service_name], service_info);
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138
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139 if not active_services:get(service_name) then
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140 log("debug", "No active service for %s, activating...", service_name);
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141 local ok, err = activate_service(service_name);
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142 if not ok then
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143 log("error", "Failed to activate service '%s': %s", service_name, err or "unknown error");
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144 end
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145 end
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146
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147 fire_event("service-added", { name = service_name, service = service_info });
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148 return true;
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149 end
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150
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151 function unregister_service(service_name, service_info)
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152 local service_info_list = services[service_name];
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153 for i, service in ipairs(service_info_list) do
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154 if service == service_info then
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155 table.remove(service_info_list, i);
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156 end
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157 end
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158 if active_services[service_name] == service_info then
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159 deactivate(service_name);
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160 if #service_info_list > 0 then -- Other services registered with this name
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161 activate(service_name); -- Re-activate with the next available one
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162 end
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163 end
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164 fire_event("service-removed", { name = service_name, service = service_info });
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165 end
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166
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167 function close(interface, port)
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168 local service, server = get_service_at(interface, port);
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169 if not service then
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170 return false, "port-not-open";
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171 end
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172 server:close();
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173 active_services:remove(service.name, interface, port);
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174 log("debug", "Removed listening service %s from [%s]:%d", service.name, interface, port);
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175 return true;
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176 end
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177
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178 function get_service_at(interface, port)
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179 local data = active_services:search(nil, interface, port)[1][1];
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180 return data.service, data.server;
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181 end
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182
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183 function get_service(service_name)
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184 return services[service_name];
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185 end
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186
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187 function get_active_services(...)
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188 return active_services;
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189 end
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190
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191 function get_registered_services()
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192 return services;
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193 end
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194
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195 return _M;