mina和websocket通信的问题

[qq_27447897]

	try {
		var url = "<%=webserviceUrl%>";
		if ('WebSocket' in window) {
			socket = new WebSocket(url);
	    } else if ('MozWebSocket' in window) {
	    	socket = new MozWebSocket(url);
	    }
	} catch (e) {
	    console.warn(e);
	}
  //连接成功时触发
  socket.onopen = function(){
	  socket.send("HEARTBEATRESPONSE");
	  //socket.send("connected successful..."); 
  };
  //监听收到的消息
  socket.onmessage = function(res){
	  alert("onmessage receiver msg:"+res.data);
	  //alert("onmessage:"+res);
	  if(res=="HEARTBEATREQUEST")
		  socket.send("HEARTBEATRESPONSE"); 
  };
  // 监听Socket的关闭
  socket.onclose = function(event) { 
	  //alert('Client notified socket has closed',event); 
	  console.debug("receiver msg:"+event);
  }; 
  socket.onerror=function(event){
	  console.error("receiver error msg:"+event);
  };

});

以上是客户端的js代码,
我服务器端使用的是mina,可是服务器跟websocket握手成功后,服务端能收到客户端的消息,但是服务端给客户端发送消息时就会报错,最后做了心跳处理,这里还是有问题,WebSocket connection to 'ws://127.0.0.1:9012/' failed: Invalid frame header
,

 public void encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception {
		 	boolean isHandshakeResponse = message instanceof String;
//	        boolean isHandshakeResponse = message instanceof WebSocketHandShakeResponse;
	        boolean isDataFramePacket = message instanceof WebSocketCodecPacket;
	        boolean isRemoteWebSocket = session.containsAttribute(WebSocketUtils.SessionAttribute) && (true==(Boolean)session.getAttribute(WebSocketUtils.SessionAttribute));
	        IoBuffer resultBuffer;
	        if(isHandshakeResponse){
//	            WebSocketHandShakeResponse response = (WebSocketHandShakeResponse)message;
//	            resultBuffer = WebSocketEncoder.buildWSResponseBuffer(response);
	            resultBuffer = IoBuffer.allocate(((String)message).getBytes().length, false);
	            resultBuffer.setAutoExpand(true);
	            resultBuffer.put(((String)message).getBytes());
	            resultBuffer.flip();
	        }
	        else if(isDataFramePacket){
	            WebSocketCodecPacket packet = (WebSocketCodecPacket)message;
	            resultBuffer = isRemoteWebSocket ? WebSocketEncoder.buildWSDataFrameBuffer(packet.getPacket()) : packet.getPacket();
	        }
	        else{
	            throw (new Exception("message not a websocket type"));
	        }
	        
	        out.write(resultBuffer);
	    }

以上是encode代码,我怀疑问题就出在这里,但是具体的原因始终找不到,可能是websocket跟mina采用的codec方式不同,请问一下哪位大神可有方法?

[qq_27447897]

代码请看if条件里面的内容即可,