mina和websocket通信的问题

2016-12-06 04:19:27 665 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Spring Boot集成WebSSH：从浏览器直连服务器的完整实践传统SSH客户端在安装配置、权限管理和协作方面存在天然短板，而WebSSH技术通过浏览器直接连接服务器，正在成为运维平台、云厂商控制台和内网管理系统的核心能力。其原理是在浏览器和SSH服务之间引入WebSocket全双工通信，由后端充当代理完成数据转发，既保证了实时交互，又将权限控制收口到服务端。基于Spring Boot框架，配合JSch连接SSH、Xterm.js渲染终端，可以快速搭建一套生产可用的WebSSH方案。然而实际操作中，字符集乱码、WebSocket会话泄漏、跨网络断线以及Nginx代理适配阅读详情

	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);

	    }