Primus WebSocket not opened issue

client.js

'use strict';

var Ws = require('ws')
  , ws = new Ws('ws://localhost:3000/primus');

ws.on('open', function() {
  var buf = new Buffer([
    0x88, // state.lastFragment = true && opcode = 8
    0x02, // state.masked = false && length = 2
    0x03, // this byte and the next => code = 1000
    0xe8
  ]);
  this._socket.write(buf); // cause WebSocket#close to be called
  process.send('write to the spark');
});

server.js

'use strict';

var fork = require('child_process').fork
  , server = require('http').createServer()
  , Primus = require('primus')
  , primus = new Primus(server, {transformer: 'websockets'});

primus.on('log', function(type) {
  if (type === 'error') {
    var err = arguments[1];
    console.error(err.message);
  }
});

server.listen(3000);

var child = fork(__dirname + '/client.js');
child.on('message', function() {
  primus.forEach(function(spark) {
    spark.write('foo');
  });
});