@OnMessage
    public void onMessage(final String message, final Session session) {
        try {
            session.getBasicRemote().sendText("ok");
        } catch (IOException e) {
            LOG.error("UpLoadController onMessage error", e);
        }
    }
receive message.
@param message  message content
@param session  session
shenyu-examples/shenyu-examples-websocket/shenyu-example-spring-annotation-websocket/src/main/java/org/apache/shenyu/examples/websocket/ws/UploadController.java