/**

* Module dependencies.

*/

var eio = require('..');

/**

* Listen shortcut that fires a callback on an ephemeral port.

*/

exports.listen = function (opts, fn) {

if ('function' === typeof opts) {

fn = opts;

opts = {};

}

var e = eio.listen(0, opts, function () {

fn(e.httpServer.address().port);

});

return e;

};

/**

* Sprintf util.

*/

require('s').extend();