如何在 Jetty 中指定 WebSocketServlet 的 URL？

发布于 2025-01-04 13:24:21 字数 1737 浏览 1 评论 0原文

我已阅读使用 Jetty 创建 WebSocket 聊天应用程序，我想在 Jetty 上使用 WebSocketServlet 创建一个简单的 echo websocket。

我已经像这样创建了我的 WebSocketServlet：

public class ChatSocketServlet extends WebSocketServlet {

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) 
        throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        out.println("<!DOCTYPE html><html><body><h1>Chat</h1></body></html>");
    }

    @Override
    public WebSocket doWebSocketConnect(HttpServletRequest request, String protocol) {
        return new ChatWebSocket();
    }

    class ChatWebSocket implements OnTextMessage {

        private Connection connection;

        @Override
        public void onClose(int closeCode, String message) {
            System.out.println("onClose");
        }

        @Override
        public void onOpen(Connection connection) {
            this.connection = connection;
        }

        @Override
        public void onMessage(String data) {
            try {
                connection.sendMessage(data);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

}

但是我应该使用什么 URL 来连接到这个 websocket？看来我不能像使用 HttpServlet 那样使用 @WebServlet （例如 @WebServlet("/HelloServlet")）。我尝试连接到：

ws://localhost:8080/MyJavaWeb/ChatWebSocket

但它返回 Not Found。是否有其他注释来指定 WebSocketServlet 的 URL？我也不知道从该 servlet 上的 doGet 获取输出的 URL。

原文

I have read Creating a WebSocket-Chat-Application with Jetty and I would like to create a simple echo websocket using a WebSocketServlet on Jetty.

I have created my WebSocketServlet like this:

public class ChatSocketServlet extends WebSocketServlet {

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) 
        throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        out.println("<!DOCTYPE html><html><body><h1>Chat</h1></body></html>");
    }

    @Override
    public WebSocket doWebSocketConnect(HttpServletRequest request, String protocol) {
        return new ChatWebSocket();
    }

    class ChatWebSocket implements OnTextMessage {

        private Connection connection;

        @Override
        public void onClose(int closeCode, String message) {
            System.out.println("onClose");
        }

        @Override
        public void onOpen(Connection connection) {
            this.connection = connection;
        }

        @Override
        public void onMessage(String data) {
            try {
                connection.sendMessage(data);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

}

But what URL should I use to connect to this websocket? It seems that I can't use the @WebServlet (e.g. @WebServlet("/HelloServlet")) as I can with HttpServlet. I have tried to connect to:

ws://localhost:8080/MyJavaWeb/ChatWebSocket

but it returns Not Found. Is there any other annotation to specify the URLs for WebSocketServlet? And I don't know the URL for getting the output from doGet on this servlet either.

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