node.js - socket.io listen / listening event -

i surprised looking @ socket.io docs there no event fired socket.io when bound port...i looking "listen" / "listening" event...

http://socket.io/docs/server-api/

i have simple module initialized http.server instance:

var io = require('socket.io');  var socketserver = null;  function getsocketserver(httpserver) {      if (socketserver === null) {          if (httpserver == null) {             throw new error('need init socketserver http.server instance');         }          socketserver = io.listen(httpserver);     }      return socketserver;  }   module.exports = {     getsocketserver:getsocketserver }; 

when require module, want listen 'listening' event.

something like:

var socket = require('./socket-cnx').getsocketserver();  socket.on('listening',function(err){  }); 

i suppose primary reason because on api used event names.

so socket.io doesn't listen. http server listens, , that's object emit listening event.

if allow socket.io create http server instance you, instance published httpserver property of io instance should able io.httpserver.on('listening', myonlisteninghandler)

here's working sample program:

var io = require('socket.io')(4001)  io.httpserver.on('listening', function () {   console.log('listening on port', io.httpserver.address().port) })