Engine.IO transport close when a polling data request is active

index.js

var Client = require('engine.io-client')
  , Engine = require('engine.io')
  , http = require('http');

var server = http.createServer()
  , engine = new Engine();

engine.on('connection', function connection(socket) {
  var onDataRequest = socket.transport.onDataRequest;

  socket.transport.onDataRequest = function (req, res) {
    onDataRequest.call(socket.transport, req, res);
    socket.close();
  };

  socket.on('message', function (data) {
    console.log(data);
  });
});

server.on('request', function request(req, res) {
  engine.handleRequest(req, res);
});

server.listen(function () {
  var client = new Client('http://localhost:' + server.address().port, {
    transports: [ 'polling' ]
  });

  client.on('open', function open() {
    client.send('bar');
  });

  client.on('close', function close() {
    server.close();
  });
});

package.json

{
  "name": "eio",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "MIT",
  "dependencies": {
    "engine.io": "^1.4.3",
    "engine.io-client": "^1.4.3"
  }
}