Question

我有以下针对websockets的测试html页面

＆＃13;

<!DOCTYPE html>
<html>

<head>
  <title>Apache Tomcat WebSocket Example</title>
  <script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
  <script type="text/javascript">
    var ws = null;
    var target = 'ws://some_ip_addr:8080/gameserv-1.0/endpoint';

    function connect() {
      if ('WebSocket' in window) {
        ws = new WebSocket(target);
      } else if ('MozWebSocket' in window) {
        ws = new MozWebSocket(target);
      } else {
        alert('WebSocket is not supported by this browser.');
        return;
      }
      ws.onopen = function() {
        log('Info: WebSocket connection opened.');
      };
      ws.onmessage = function(event) {
        log('Received: ' + event.data);
      };
      ws.onclose = function() {
        log('Info: WebSocket connection closed.');
      };
    }

    function disconnect() {
      if (ws != null) {
        ws.close();
        ws = null;
      }
      //            setConnected(false);
    }

    function log(message) {
      $("#mydiv").append($("<p>").text(message));
    }

    function testButtonSend() {
      var message = {
        'commandType': 'TEST',
        'command': 'AUCTIONLIST'
      };
      ws.send(message);
    }

    $(document).ready(function() {
      connect();
    });
  </script>
</head>

<body>
  <div id="mydiv">
    <input type="button" onclick="testButtonSend()">
  </div>
</body>

</html>

＆＃13;

负责此websocket的java类是：

@ServerEndpoint("/endpoint")
public final class Websocket {

    Gson gson = new Gson();
    private boolean connectionOpen;
    private Session session;

    public Websocket(int byteBufferMaxSize, int charBufferMaxSize) {
        super();
        setConnectionOpen(false);
    }

    @OnOpen
    public void onOpen(final Session session, EndpointConfig config) {
        this.connectionOpen = true;
        this.session = session;
    }

    @OnClose
    public void close(Session session,
                      CloseReason reason) {
        this.connectionOpen = false;
        this.session = null;
    }

    @OnMessage
    public void onTextMessage(Session session, String message) throws IOException {
        MessageFromClientAPI messageFromClient = gson.fromJson(message, MessageFromClientAPI.class);

        Integer pID = messageFromClient.getpID();
        ....
    }

    public boolean send(MessageToClientAPI message) {
        if (!connectionOpen)
            return false;
        try {
            session.getBasicRemote().sendText(gson.toJson(message));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return true;
    }

    public boolean isConnectionOpen() {
        return connectionOpen;
    }

    public void setConnectionOpen(boolean connectionOpen) {
        this.connectionOpen = connectionOpen;
    }
}

问题是连接在打开后立即关闭。此外，调试器不会停止onOpen方法（以及任何其他方法）。

错误是什么？

Answer 1

问题已解决。它的原因是在构造函数中。这是不正确的。我刚删除它，现在它可以工作了。

Websocket在打开后关闭连接

1 个答案: