websocket binary data test - websocket-node

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);

  var buffer = new Uint8Array(message.data);
  console.dir(buffer);
}

server

    var connection = request.accept(null, request.origin);
    console.log((new Date()) + " Connection accepted.");
    connection.on('message', function(message) {
        if (message.type === 'utf8') {
            console.log("Received Message: " + message.utf8Data);
            connection.sendUTF(message.utf8Data);
        }
        else if (message.type === 'binary') {
            console.log("Received Binary Message of " + message.binaryData.length + " bytes");

            console.log(Buffer.isBuffer(message.binaryData));
            console.log(message.binaryData);

            for (var i = 0; i < message.binaryData.byteLength; 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)

            connection.sendBytes(buf);
        }
    });