To pass a parameter in HTML5 web sockets to java class

Question

How to pass parameter in HTML5 web-sockets and get this values in java class

I passed parameter like this in Chat.initialize function

  Chat.connect('ws://' + window.location.host + '/examples/websocket/chat?id=man');

my JS code is:

    var Chat = {};

    Chat.socket = null;

    Chat.connect = (function(host) {
        if ('WebSocket' in window) {
            Chat.socket = new WebSocket(host);
        } else if ('MozWebSocket' in window) {
            Chat.socket = new MozWebSocket(host);
        } else {
            Console.log('Error: WebSocket is not supported by this browser.');
            return;
        }

        Chat.socket.onopen = function () {
            Console.log('Info: WebSocket connection opened.');
            document.getElementById('chat').onkeydown = function(event) {
                if (event.keyCode == 13) {
                    Chat.sendMessage();
                }
            };
        };

        Chat.socket.onclose = function () {
            document.getElementById('chat').onkeydown = null;
            Console.log('Info: WebSocket closed.');
        };

        Chat.socket.onmessage = function (message) {
            Console.log(message.data);
        };
    });

    Chat.initialize = function() {
        if (window.location.protocol == 'http:') {
            Chat.connect('ws://' + window.location.host + '/examples/websocket/chat?id=man');
        } else {
            Chat.connect('wss://' + window.location.host + '/examples/websocket/chat?id=man');
        }
    };

    Chat.sendMessage = (function() {
        var message = document.getElementById('chat').value;
        if (message != '') {
            Chat.socket.send(message);
            document.getElementById('chat').value = '';
        }
    });

    var Console = {};

    Console.log = (function(message) {
        var console = document.getElementById('console');
        var p = document.createElement('p');
        p.style.wordWrap = 'break-word';
        p.innerHTML = message;
        console.appendChild(p);
        while (console.childNodes.length > 25) {
            console.removeChild(console.firstChild);
        }
        console.scrollTop = console.scrollHeight;
    });

    Chat.initialize();


    document.addEventListener("DOMContentLoaded", function() {
        // Remove elements with "noscript" class - <noscript> is not allowed in XHTML
        var noscripts = document.getElementsByClassName("noscript");
        for (var i = 0; i < noscripts.length; i++) {
            noscripts[i].parentNode.removeChild(noscripts[i]);
        }
    }, false);

And my java class is like this,But request.getParameter("id"); giving null value.

       public class ChatAnnotation extends HttpServlet{
String name;

protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
             name = request.getParameter("id");

          //giving null values here.                    
}
private static final Log log = LogFactory.getLog(ChatAnnotation.class);

private static final String GUEST_PREFIX = "Guest";
private static final AtomicInteger connectionIds = new AtomicInteger(0);
private static final Set<ChatAnnotation> connections =
        new CopyOnWriteArraySet<>();

private final String nickname;
private Session session;


public ChatAnnotation() {
    nickname = name;
}


@OnOpen
public void start(Session session) {
    this.session = session;
    connections.add(this);
    String message = String.format("* %s %s", nickname, "has joined.");
    broadcast(message);
}


@OnClose
public void end() {
    connections.remove(this);
    String message = String.format("* %s %s",
            nickname, "has disconnected.");
    broadcast(message);
}


@OnMessage
public void incoming(String message) {
    // Never trust the client
    String filteredMessage = String.format("%s: %s",
            nickname, HTMLFilter.filter(message.toString()));
    broadcast(filteredMessage);
}




@OnError
public void onError(Throwable t) throws Throwable {
    log.error("Chat Error: " + t.toString(), t);
}


private static void broadcast(String msg) {
    for (ChatAnnotation client : connections) {
        try {
            synchronized (client) {
                client.session.getBasicRemote().sendText(msg);
            }
        } catch (IOException e) {
            log.debug("Chat Error: Failed to send message to client", e);
            connections.remove(client);
            try {
                client.session.close();
            } catch (IOException e1) {
                // Ignore
            }
            String message = String.format("* %s %s",
                    client.nickname, "has been disconnected.");
            broadcast(message);
           }
       }
    }
  }

How can I overcome this problem.
Thanks for any help.