websocket binary data test - websocket.io

browser

var socket = null;

$(function() {
  socket = new WebSocket('ws://localhost:3000');
  socket.binaryType = 'arraybuffer';
  socket.onmessage = function(message) {
    receiveBinary(message);
  };

  setTimeout(sendBinary, 1000);
});

function sendBinary() {
  var byteArray = new Uint8Array(4);
  byteArray[0] = 0x01;
  byteArray[1] = 0x10;
  byteArray[2] = 0xff;
  byteArray[3] = 0xde;
  
  socket.send(byteArray.buffer);
} 

function receiveBinary(message) {
  console.dir(message);
}

server

server.on('connection', function (client) {
  console.log('connedted!');
  client.on('message', function(data) {
    console.log(Buffer.isBuffer(data));
    console.log(data);

    for (var i = 0; i < data.length; i++) {
      console.log(data.readUInt8(i));
    }

    var buf = new Buffer(5);
    buf.writeUInt8(0x3, 0);
    buf.writeUInt8(0x4, 1);
    buf.writeUInt8(0x23, 2);
    buf.writeUInt8(0x42, 3);
    buf.writeUInt8(0xff, 4)

    // it fails and it seems like it tried to convert to text internally
    client.send(buf);
  });
});