verse
fa3ddadb8364
init.lua

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init.lua @ 126:fa3ddadb8364

verse: verse.loop() and new verse.step() use the new error handler to, er, handle errors.
author Matthew Wild <mwild1@gmail.com>
date Mon, 13 Sep 2010 14:08:41 +0100
parent 125:b46921de1e03
child 132:b38397163737
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ec6b0b94826c verse: Include LuaRocks packages if we can
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2 -- Use LuaRocks if available
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3 pcall(require, "luarocks.require");
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5 -- Load LuaSec if available
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6 pcall(require, "ssl");
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9c96318913f7 Revert module names throughout to their Prosody equivalents
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8 local server = require "net.server";
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9 local events = require "util.events";
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11 module("verse", package.seeall);
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12 local verse = _M;
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14 local stream = {};
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15 stream.__index = stream;
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16 stream_mt = stream;
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18 verse.plugins = {};
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19
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20 function verse.new(logger, base)
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21 local t = setmetatable(base or {}, stream);
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22 t.id = tostring(t):match("%x*$");
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23 t:set_logger(logger, true);
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24 t.events = events.new();
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25 return t;
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26 end
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28 verse.add_task = require "util.timer".add_task;
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30 verse.logger = logger.init;
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31 verse.log = verse.logger("verse");
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b46921de1e03 verse: Add verse.log() to log a message using the default logger. Also add verse.set_error_handler() to, er, set an error handler.
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33 function verse.set_logger(logger)
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34 verse.log = logger("verse");
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35 server.setlogger(logger);
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36 end
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38 local function error_handler(err)
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39 verse.log("error", "Error: %s", err);
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40 verse.log("error", "Traceback: %s", debug.traceback());
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41 end
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43 function verse.set_error_handler(new_error_handler)
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44 error_handler = new_error_handler;
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45 end
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46
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47 function verse.loop()
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48 return xpcall(server.loop, error_handler);
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49 end
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50
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51 function verse.step()
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52 return xpcall(server.step, error_handler);
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53 end
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55 function verse.quit()
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56 return server.setquitting(true);
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57 end
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58
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59 function stream:connect(connect_host, connect_port)
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60 connect_host = connect_host or "localhost";
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61 connect_port = tonumber(connect_port) or 5222;
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63 -- Create and initiate connection
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64 local conn = socket.tcp()
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65 conn:settimeout(0);
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66 local success, err = conn:connect(connect_host, connect_port);
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67
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68 if not success and err ~= "timeout" then
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69 self:warn("connect() to %s:%d failed: %s", connect_host, connect_port, err);
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70 return false, err;
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71 end
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72
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73 local conn = server.wrapclient(conn, connect_host, connect_port, new_listener(self), "*a");
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74 if not conn then
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75 self:warn("connection initialisation failed: %s", err);
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76 return false, err;
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77 end
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79 self.conn = conn;
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80 local w, t = conn.write, tostring;
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81 self.send = function (_, data) return w(conn, t(data)); end
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82 return true;
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83 end
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84
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85 function stream:close()
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86 local on_disconnect = self.conn.disconnect();
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87 self.conn:close();
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88 on_disconnect(conn, reason);
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89 end
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90
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91 -- Logging functions
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92 function stream:debug(...)
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93 if self.logger and self.log.debug then
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94 return self.logger("debug", ...);
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95 end
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96 end
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97
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98 function stream:warn(...)
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99 if self.logger and self.log.warn then
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100 return self.logger("warn", ...);
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101 end
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102 end
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103
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104 function stream:error(...)
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105 if self.logger and self.log.error then
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106 return self.logger("error", ...);
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107 end
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108 end
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109
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110 function stream:set_logger(logger, levels)
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111 local old_logger = self.logger;
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112 if logger then
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113 self.logger = logger;
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114 end
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115 if levels then
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116 if levels == true then
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117 levels = { "debug", "info", "warn", "error" };
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118 end
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119 self.log = {};
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120 for _, level in ipairs(levels) do
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121 self.log[level] = true;
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122 end
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123 end
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124 return old_logger;
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125 end
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126
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127 function stream_mt:set_log_levels(levels)
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128 self:set_logger(nil, levels);
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129 end
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130
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131 -- Event handling
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132 function stream:event(name, ...)
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133 self:debug("Firing event: "..tostring(name));
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134 return self.events.fire_event(name, ...);
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135 end
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136
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137 function stream:hook(name, ...)
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138 return self.events.add_handler(name, ...);
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139 end
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140
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141 function stream:unhook(name, handler)
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142 return self.events.remove_handler(name, handler);
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143 end
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144
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145 function verse.eventable(object)
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146 object.events = events.new();
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147 object.hook, object.unhook = stream.hook, stream.unhook;
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148 local fire_event = object.events.fire_event;
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149 function object:event(name, ...)
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150 return fire_event(name, ...);
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151 end
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152 return object;
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153 end
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154
3
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155 function stream:add_plugin(name)
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156 if require("verse.plugins."..name) then
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157 local ok, err = verse.plugins[name](self);
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158 if ok then
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159 self:debug("Loaded %s plugin", name);
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160 else
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161 self:warn("Failed to load %s plugin: %s", name, err);
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162 end
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163 end
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164 return self;
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165 end
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166
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167 -- Listener factory
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168 function new_listener(stream)
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169 local conn_listener = {};
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170
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171 function conn_listener.onconnect(conn)
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172 stream.connected = true;
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173 stream.send = function (stream, data) stream:debug("Sending data: "..tostring(data)); return conn:write(tostring(data)); end;
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174 stream:event("connected");
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175 end
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176
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177 function conn_listener.onincoming(conn, data)
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178 stream:event("incoming-raw", data);
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179 end
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180
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181 function conn_listener.ondisconnect(conn, err)
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182 stream.connected = false;
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183 stream:event("disconnected", { reason = err });
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184 end
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185
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186 function conn_listener.ondrain(conn)
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187 stream:event("drained");
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188 end
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189
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190 function conn_listener.onstatus(conn, new_status)
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191 stream:event("status", new_status);
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192 end
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193
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194 return conn_listener;
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195 end
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196
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197
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198 local log = require "util.logger".init("verse");
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199
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200 return verse;