curl node repl (possibly dangerous?)

repl.js

var http = require('http');
var pty = require('pty.js');

var server = http.createServer(function(req, res) {
  var ua = req.headers['user-agent'] || '';
  if (!~ua.indexOf('curl/')) {
    res.setHeader('Content-Type', 'text/plain');
    return res.end('curl -sSNT. localhost:8000');
  }

  var ps = pty.fork('irssi', [], {
    name: 'xterm',
    cols: 80,
    rows: 24
  });

  res.setHeader('Content-Type', 'multipart/octet-stream');

  var iv = setInterval(function () {
    res.write('\0');
  }, 100);

  req.on('end', function () {
    clearInterval(iv);
    ps.destroy();
  });

  ps.pipe(res);
  req.pipe(ps);
});

server.listen(8000, 'localhost', function() {
  console.log('curl -sSNT. localhost:8000');
});