verse
3112a9e450ac
init.lua

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init.lua @ 173:3112a9e450ac

verse: Make add_plugin only load a plugin once per stream
author Matthew Wild <mwild1@gmail.com>
date Thu, 30 Dec 2010 22:59:23 +0000
parent 163:48a47bca9a63
child 205:cbcd45be11a8
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1
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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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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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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 t.plugins = {};
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26 return t;
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27 end
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29 verse.add_task = require "util.timer".add_task;
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31 verse.logger = logger.init;
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32 verse.log = verse.logger("verse");
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34 function verse.set_logger(logger)
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35 verse.log = logger;
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36 server.setlogger(logger);
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37 end
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39 function verse.filter_log(levels, logger)
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40 local level_set = {};
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41 for _, level in ipairs(levels) do
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42 level_set[level] = true;
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43 end
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44 return function (level, name, ...)
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45 if level_set[level] then
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46 return logger(level, name, ...);
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47 end
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48 end;
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49 end
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51 local function error_handler(err)
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52 verse.log("error", "Error: %s", err);
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53 verse.log("error", "Traceback: %s", debug.traceback());
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54 end
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56 function verse.set_error_handler(new_error_handler)
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57 error_handler = new_error_handler;
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58 end
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59
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60 function verse.loop()
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61 return xpcall(server.loop, error_handler);
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62 end
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63
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64 function verse.step()
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65 return xpcall(server.step, error_handler);
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66 end
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68 function verse.quit()
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69 return server.setquitting(true);
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70 end
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71
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72 function stream:connect(connect_host, connect_port)
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73 connect_host = connect_host or "localhost";
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74 connect_port = tonumber(connect_port) or 5222;
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75
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76 -- Create and initiate connection
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77 local conn = socket.tcp()
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78 conn:settimeout(0);
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79 local success, err = conn:connect(connect_host, connect_port);
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80
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81 if not success and err ~= "timeout" then
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82 self:warn("connect() to %s:%d failed: %s", connect_host, connect_port, err);
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83 return self:event("disconnected", { reason = err }) or false, err;
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84 end
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85
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86 local conn = server.wrapclient(conn, connect_host, connect_port, new_listener(self), "*a");
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87 if not conn then
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88 self:warn("connection initialisation failed: %s", err);
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89 return self:event("disconnected", { reason = err }) or false, err;
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90 end
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92 self.conn = conn;
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93 self.send = function (stream, data)
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94 self:event("outgoing", data);
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95 data = tostring(data);
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96 self:event("outgoing-raw", data);
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97 return conn:write(data);
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98 end;
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99 return true;
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100 end
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101
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102 function stream:close()
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103 if not self.conn then
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104 verse.log("error", "Attempt to close disconnected connection - possibly a bug");
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105 return;
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106 end
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107 local on_disconnect = self.conn.disconnect();
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108 self.conn:close();
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109 on_disconnect(conn, reason);
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110 end
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111
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112 -- Logging functions
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113 function stream:debug(...)
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114 if self.logger and self.log.debug then
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115 return self.logger("debug", ...);
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116 end
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117 end
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118
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119 function stream:warn(...)
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120 if self.logger and self.log.warn then
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121 return self.logger("warn", ...);
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122 end
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123 end
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124
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125 function stream:error(...)
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126 if self.logger and self.log.error then
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127 return self.logger("error", ...);
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128 end
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129 end
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130
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131 function stream:set_logger(logger, levels)
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132 local old_logger = self.logger;
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133 if logger then
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134 self.logger = logger;
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135 end
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136 if levels then
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137 if levels == true then
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138 levels = { "debug", "info", "warn", "error" };
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139 end
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140 self.log = {};
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141 for _, level in ipairs(levels) do
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142 self.log[level] = true;
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143 end
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144 end
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145 return old_logger;
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146 end
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147
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148 function stream_mt:set_log_levels(levels)
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149 self:set_logger(nil, levels);
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150 end
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151
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152 -- Event handling
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153 function stream:event(name, ...)
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154 self:debug("Firing event: "..tostring(name));
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155 return self.events.fire_event(name, ...);
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156 end
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157
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158 function stream:hook(name, ...)
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159 return self.events.add_handler(name, ...);
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160 end
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161
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162 function stream:unhook(name, handler)
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163 return self.events.remove_handler(name, handler);
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164 end
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165
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166 function verse.eventable(object)
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167 object.events = events.new();
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168 object.hook, object.unhook = stream.hook, stream.unhook;
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169 local fire_event = object.events.fire_event;
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170 function object:event(name, ...)
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171 return fire_event(name, ...);
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172 end
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173 return object;
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174 end
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175
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176 function stream:add_plugin(name)
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177 if self.plugins[name] then return true; end
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178 if require("verse.plugins."..name) then
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179 local ok, err = verse.plugins[name](self);
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180 if ok ~= false then
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181 self:debug("Loaded %s plugin", name);
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182 self.plugins[name] = true;
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183 else
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184 self:warn("Failed to load %s plugin: %s", name, err);
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185 end
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186 end
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187 return self;
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188 end
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189
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190 -- Listener factory
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191 function new_listener(stream)
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192 local conn_listener = {};
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193
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194 function conn_listener.onconnect(conn)
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195 stream.connected = true;
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196 stream:event("connected");
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197 end
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198
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199 function conn_listener.onincoming(conn, data)
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200 stream:event("incoming-raw", data);
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201 end
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202
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203 function conn_listener.ondisconnect(conn, err)
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204 stream.connected = false;
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205 stream:event("disconnected", { reason = err });
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206 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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207
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208 function conn_listener.ondrain(conn)
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209 stream:event("drained");
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210 end
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211
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1f47ddab3499 verse: Fire "status" event for connection status changes (notably SSL handshake complete)
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212 function conn_listener.onstatus(conn, new_status)
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213 stream:event("status", new_status);
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214 end
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215
0
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216 return conn_listener;
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217 end
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218
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219
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220 local log = require "util.logger".init("verse");
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221
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222 return verse;