Director::on not working as expected

gistfile1.md

This does not fire on http://127.0.0.1:8080/hello:

var http = require('http'),
    director = require('director');

var router = new director.http.Router({
  '/hello': {
    on: function() {
    	this.res.end('Hellow World')
    	console.log('Hellow World');
    }
  }
});

http.createServer(router.dispatch.bind(router)).listen(8080);

But this does:

var http = require('http'),
    director = require('director');

var router = new director.http.Router({
  '/hello': {
    get: function() {
    	this.res.end('Hellow World')
    	console.log('Hellow World');
    }
  }
});

http.createServer(router.dispatch.bind(router)).listen(8080);