verse
ab4773b0ef5e
init.lua

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init.lua @ 242:ab4773b0ef5e

verse: Add default log handler for errors
author Matthew Wild <mwild1@gmail.com>
date Sun, 27 Nov 2011 23:00:15 +0000
parent 241:931bf313c691
child 247:7c58c16efa3e
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caf260adc453 Beginning of new verse
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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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a28540d4117a verse: Load LuaSec if possible
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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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d158c97556b4 verse: require('util.logger') (besides being correct, also fixes a silly bug when loading verse twice)
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10 local logger = require "util.logger";
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12 module("verse", package.seeall);
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13 local verse = _M;
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cbcd45be11a8 verse: Expose net.server as verse.server
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14 _M.server = server;
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16 local stream = {};
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17 stream.__index = stream;
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18 stream_mt = stream;
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372ddb5900d3 verse: Support for loading plugins
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20 verse.plugins = {};
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21
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22 local max_id = 0;
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37396504de5f verse: Multiple changes to allow controlling logging for both verse and streams
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24 function verse.new(logger, base)
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25 local t = setmetatable(base or {}, stream);
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26 max_id = max_id + 1;
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27 t.id = tostring(max_id);
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28 t.logger = logger or verse.new_logger("stream"..t.id);
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29 t.events = events.new();
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30 t.plugins = {};
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31 return t;
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32 end
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6006e6bb1c28 verse: Add verse.add_task(delay, callback) to add timer functions using util.timer
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34 verse.add_task = require "util.timer".add_task;
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36 verse.logger = logger.init; -- COMPAT: Deprecated
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d75a209e57fc verse: verse.logger() -> verse.new_logger()
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37 verse.new_logger = logger.init;
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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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38 verse.log = verse.logger("verse");
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40 local function format(format, ...)
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41 local n, arg, maxn = 0, { ... }, select('#', ...);
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42 return (format:gsub("%%(.)", function (c) if n <= maxn then n = n + 1; return tostring(arg[n]); end end));
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43 end
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44
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45 function verse.set_log_handler(log_handler, levels)
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46 levels = levels or { "debug", "info", "warn", "error" };
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47 logger.reset();
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48 local function _log_handler(name, level, message, ...)
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49 return log_handler(name, level, format(message, ...));
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50 end
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e27bf761bea6 verse: set_log_handler(): Allow nil to be passed for log_handler to disable logging (the default).
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51 if log_handler then
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52 for i, level in ipairs(levels) do
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53 logger.add_level_sink(level, _log_handler);
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54 end
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ea753bc81a33 verse: Add verse.filter_log(levels, logger) to filter a logger for certain levels
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55 end
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56 end
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57
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ab4773b0ef5e verse: Add default log handler for errors
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58 function _default_log_handler(name, level, message)
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59 return io.stderr:write(name, "\t", level, "\t", message, "\n");
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60 end
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61 verse.set_log_handler(_default_log_handler, { "error" });
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62
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63 local function error_handler(err)
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64 verse.log("error", "Error: %s", err);
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65 verse.log("error", "Traceback: %s", debug.traceback());
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66 end
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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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68 function verse.set_error_handler(new_error_handler)
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69 error_handler = new_error_handler;
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70 end
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71
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72 function verse.loop()
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fa3ddadb8364 verse: verse.loop() and new verse.step() use the new error handler to, er, handle errors.
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73 return xpcall(server.loop, error_handler);
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74 end
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75
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76 function verse.step()
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77 return xpcall(server.step, error_handler);
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78 end
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80 function verse.quit()
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81 return server.setquitting(true);
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82 end
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83
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84 function stream:connect(connect_host, connect_port)
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85 connect_host = connect_host or "localhost";
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86 connect_port = tonumber(connect_port) or 5222;
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87
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88 -- Create and initiate connection
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89 local conn = socket.tcp()
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90 conn:settimeout(0);
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91 local success, err = conn:connect(connect_host, connect_port);
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92
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93 if not success and err ~= "timeout" then
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94 self:warn("connect() to %s:%d failed: %s", connect_host, connect_port, err);
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95 return self:event("disconnected", { reason = err }) or false, err;
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96 end
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97
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98 local conn = server.wrapclient(conn, connect_host, connect_port, new_listener(self), "*a");
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99 if not conn then
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3659ba3b8dfa verse: Log error when connection fails instantly
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100 self:warn("connection initialisation failed: %s", err);
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101 return self:event("disconnected", { reason = err }) or false, err;
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102 end
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103
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104 self.conn = conn;
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105 self.send = function (stream, data)
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106 self:event("outgoing", data);
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107 data = tostring(data);
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108 self:event("outgoing-raw", data);
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109 return conn:write(data);
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110 end;
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f0aec10023aa verse: Return true from connect() on success, add stream:close()
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111 return true;
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112 end
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113
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114 function stream:close()
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115 if not self.conn then
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116 verse.log("error", "Attempt to close disconnected connection - possibly a bug");
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117 return;
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118 end
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119 local on_disconnect = self.conn.disconnect();
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120 self.conn:close();
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121 on_disconnect(conn, reason);
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122 end
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123
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124 -- Logging functions
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125 function stream:debug(...)
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126 return self.logger("debug", ...);
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127 end
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128
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129 function stream:warn(...)
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130 return self.logger("warn", ...);
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131 end
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132
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133 function stream:error(...)
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134 return self.logger("error", ...);
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b40465267fb5 verse: Add stream:set_loglevels()
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135 end
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136
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137 -- Event handling
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138 function stream:event(name, ...)
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139 self:debug("Firing event: "..tostring(name));
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140 return self.events.fire_event(name, ...);
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141 end
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142
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143 function stream:hook(name, ...)
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144 return self.events.add_handler(name, ...);
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145 end
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146
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147 function stream:unhook(name, handler)
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148 return self.events.remove_handler(name, handler);
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149 end
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150
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151 function verse.eventable(object)
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152 object.events = events.new();
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153 object.hook, object.unhook = stream.hook, stream.unhook;
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154 local fire_event = object.events.fire_event;
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155 function object:event(name, ...)
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156 return fire_event(name, ...);
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157 end
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158 return object;
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159 end
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160
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161 function stream:add_plugin(name)
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162 if self.plugins[name] then return true; end
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163 if require("verse.plugins."..name) then
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164 local ok, err = verse.plugins[name](self);
162
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165 if ok ~= false then
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166 self:debug("Loaded %s plugin", name);
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167 self.plugins[name] = true;
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168 else
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169 self:warn("Failed to load %s plugin: %s", name, err);
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170 end
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171 end
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172 return self;
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173 end
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174
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175 -- Listener factory
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176 function new_listener(stream)
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177 local conn_listener = {};
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178
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179 function conn_listener.onconnect(conn)
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180 stream.connected = true;
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181 stream:event("connected");
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182 end
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183
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184 function conn_listener.onincoming(conn, data)
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185 stream:event("incoming-raw", data);
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186 end
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187
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188 function conn_listener.ondisconnect(conn, err)
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189 stream.connected = false;
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190 stream:event("disconnected", { reason = err });
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191 end
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163beb198646 verse: Add "drained" event to signal when send buffer is empty (new server.lua feature)
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192
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193 function conn_listener.ondrain(conn)
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194 stream:event("drained");
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195 end
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196
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197 function conn_listener.onstatus(conn, new_status)
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198 stream:event("status", new_status);
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199 end
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200
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201 return conn_listener;
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202 end
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203
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204
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205 local log = require "util.logger".init("verse");
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206
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207 return verse;