var http = require('http');
http.createServer(function(req, res) {
    res.writeHead(200, {
        'Content-Type': 'text/html'
    });

    res.write('first chunk');

    setTimeout(function () {
        res.end('after 2000 ms. this line will appear');
    }, 2000);
}).listen(process.env.C9_PORT, "0.0.0.0");