zero-length response in Node

gistfile1.js

var http = require('http');

var server = http.createServer(function (request, response) {
  response.setHeader('content-length', 0);
  response.end();
});

server.listen(8000, function() {
  console.log("Server running at http://127.0.0.1:8000/");


  var req = http.request({
    host: 'localhost',
    port: 8000
  }, function(res) {
    console.log('HEADERS: ' + JSON.stringify(res.headers));
    res.on('data', function (chunk) {
      console.log('BODY: ' + chunk);
    });
    res.on('end', function() {
      console.log('END');
    });
  });

  req.end();
});