服务器不解码数据包

时间:2016-02-20 19:32:46

标签: java sockets networking tcp bufferedreader

我正在为我的项目设计一个通信系统。但是,我在处理数据包时遇到了一些麻烦。我的通信系统是使用ServerSocket,Socket,BufferedReader和PrintWriter在java.net中编写的。

目前,我的系统每500ms侦听一次数据包。它处理登录数据包很好,但它无法处理登录后的数据包(发送ID,断开连接)。每隔500ms,我需要我的服务器来监听登录和登录后的数据包(发送id,断开连接)。我如何设计一种检测和处理登录后数据包的方法?登录数据包由握手代码,用户名和密码组成。登录后数据包(打印ID,断开连接)包括握手代码,用户ID,事件ID和其他事件参数。

使用bufferedreader和printwriter作为一行文本发送和接收数据包。

这是我的服务器端解码器

    protected void decode(Socket server) throws Exception {
    final BufferedReader reader = new BufferedReader(new InputStreamReader(server.getInputStream()));
    final int handshake = Integer.parseInt(reader.readLine());
    if (handshake == LOGIN) {
        final Session session = new LoginSession(server, reader);
        session.read(-1);
    } else if (handshake == POST_LOGIN) {
        final int index = Integer.parseInt(reader.readLine());
        final int opcode = Integer.parseInt(reader.readLine());
        final Session session = store.get(index).getSession();
        session.reader = reader;
        session.read(opcode);
    }

}

@Override
public void run() {
    Socket server;
    try {
        server = serverSocket.accept();
        server.setTcpNoDelay(false);
        decode(server);
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

这些是我的客户 - >服务器数据包

    public void sendLogin() {
    write.write("100");
    write.write('\n');
    write.write("raees2");
    write.write('\n');
    write.write("LOL2");
    write.write('\n');
    write.flush();
}

public void sendPrintId() throws NumberFormatException, IOException {
    final BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream()));
    final int id = Integer.parseInt(reader.readLine());
    System.out.println(id);

    write.write("101");
    write.write('\n');
    write.write(Integer.toString(id));
    write.write('\n');
    write.write(Integer.toString(0));
    write.write('\n');
    write.write(Integer.toString(10003));
    write.write('\n');
    write.flush();
}

public void sendDisconnection() throws NumberFormatException, IOException {
    final BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream()));
    final int id = Integer.parseInt(reader.readLine());
    System.out.println(id);

    write.write("101");
    write.write('\n');
    write.write(Integer.toString(id));
    write.write('\n');
    write.write(Integer.toString(1));
    write.write('\n');
    write.flush();
}

1 个答案:

答案 0 :(得分:1)

基本上,您只需要一个循环来继续从流中读取,直到对话完成。现在,它会读取一条消息并终止。

我不确定你的协议是如何工作的,但这样的事情可以给出一个起点:

protected void decode(Socket server) throws Exception {
    final BufferedReader reader = new BufferedReader(new InputStreamReader(server.getInputStream()));

    /*
     * Somewhere in this loop, detect your protocol's termination condition
     * and break out.
     */

    for (;;) {
        final int handshake = Integer.parseInt(reader.readLine());
        if (handshake == LOGIN) {
            final Session session = new LoginSession(server, reader);
            session.read(-1);
        } else if (handshake == POST_LOGIN) {
            final int index = Integer.parseInt(reader.readLine());
            final int opcode = Integer.parseInt(reader.readLine());
            final Session session = store.get(index).getSession();
            session.reader = reader;
            session.read(opcode);
        }
    }
}

如果您需要同时处理多个连接,您可能希望您的acceptor线程为成功连接的每个连接启动一个新的客户端线程,因为decode将在等待下一条消息时阻塞。