java - spring tcp 套接字，授权客户端并处理未决响应

Question

Spring 框架也支持 tcp 连接，我在下面编写了代码来设置一个简单的套接字服务器，我对将以下 future 添加到我的套接字服务器感到困惑:

• 根据唯一标识符授权客户端(例如从客户端收到的客户端 secret ，可能使用 TCP Connection Events)
• 直接向特定客户端发送消息(基于标识符)
• 广播消息

更新:

• Config.sendMessage 添加到单个客户端发送消息

• Config.broadCast 添加到广播消息

• authorizeIncomingConnection 授权客户端，接受或拒绝连接

• tcpConnections 添加静态文件以保留 tcpEvent 源

问题!

• 正在使用 tcpConnections HashMap 好主意？!

• 我实现的授权方法好吗？!

主.java

@SpringBootApplication
public class Main {

    public static void main(final String[] args) {
        SpringApplication.run(Main.class, args);
    }

}

配置.java

@EnableIntegration
@IntegrationComponentScan
@Configuration
public class Config implements ApplicationListener<TcpConnectionEvent> {

    private static final Logger LOGGER = Logger.getLogger(Config.class.getName());

    @Bean
    public AbstractServerConnectionFactory AbstractServerConnectionFactory() {
        return new TcpNetServerConnectionFactory(8181);
    }

    @Bean
    public TcpInboundGateway TcpInboundGateway(AbstractServerConnectionFactory connectionFactory) {
        TcpInboundGateway inGate = new TcpInboundGateway();
        inGate.setConnectionFactory(connectionFactory);
        inGate.setRequestChannel(getMessageChannel());
        return inGate;
    }

    @Bean
    public MessageChannel getMessageChannel() {
        return new DirectChannel();
    }

    @MessageEndpoint
    public class Echo {

        @Transformer(inputChannel = "getMessageChannel")
        public String convert(byte[] bytes) throws Exception {
            return new String(bytes);
        }

    }

    private static ConcurrentHashMap<String, TcpConnection> tcpConnections = new ConcurrentHashMap<>();

    @Override
    public void onApplicationEvent(TcpConnectionEvent tcpEvent) {
        TcpConnection source = (TcpConnection) tcpEvent.getSource();
        if (tcpEvent instanceof TcpConnectionOpenEvent) {

            LOGGER.info("Socket Opened " + source.getConnectionId());
            tcpConnections.put(tcpEvent.getConnectionId(), source);

            if (!authorizeIncomingConnection(source.getSocketInfo())) {
                LOGGER.warn("Socket Rejected " + source.getConnectionId());
                source.close();
            }

        } else if (tcpEvent instanceof TcpConnectionCloseEvent) {
            LOGGER.info("Socket Closed " + source.getConnectionId());
            tcpConnections.remove(source.getConnectionId());
        }
    }

    private boolean authorizeIncomingConnection(SocketInfo socketInfo) {
        //Authorization Logic , Like Ip,Mac Address WhiteList or anyThing else !
        return (System.currentTimeMillis() / 1000) % 2 == 0;
    }

    public static String broadCast(String message) {
        Set<String> connectionIds = tcpConnections.keySet();
        int successCounter = 0;
        int FailureCounter = 0;
        for (String connectionId : connectionIds) {
            try {
                sendMessage(connectionId, message);
                successCounter++;
            } catch (Exception e) {
                FailureCounter++;
            }
        }
        return "BroadCast Result , Success : " + successCounter + " Failure : " + FailureCounter;
    }

    public static void sendMessage(String connectionId, final String message) throws Exception {
        tcpConnections.get(connectionId).send(new Message<String>() {
            @Override
            public String getPayload() {
                return message;
            }

            @Override
            public MessageHeaders getHeaders() {
                return null;
            }
        });
    }
}

主 Controller .java

@Controller
public class MainController {

    @RequestMapping("/notify/{connectionId}/{message}")
    @ResponseBody
    public String home(@PathVariable String connectionId, @PathVariable String message) {
        try {
            Config.sendMessage(connectionId, message);
            return "Client Notified !";
        } catch (Exception e) {
            return "Failed To Notify Client , cause : \n " + e.toString();
        }
    }


    @RequestMapping("/broadCast/{message}")
    @ResponseBody
    public String home(@PathVariable String message) {
        return Config.broadCast(message);
    }

}

用法:

1. 套接字请求/响应模式

2. 通知单个客户

   http://localhost:8080/notify/{connectionId}/{message}

3. 广播

   http://localhost:8080/broadCast/{message}

Answer 1

TcpConnectionOpenEvent 包含一个 connectionId 属性。来自该客户端的每条消息在 IpHeaders.CONNECTION_ID 消息 header 中都将具有相同的属性。

1. 添加一个自定义路由器来跟踪每个连接的登录状态。
2. 查找连接 ID，如果未通过身份验证，则路由到质询/响应子流。
3. 通过身份验证后，路由到正常流程。

要使用任意消息(而不是请求/响应)，请使用 TcpReceivingChannelAdapter 和 TcpSendingMessageHandler 而不是入站网关。两者都配置为使用相同的连接工厂。对于发送到消息处理程序的每条消息，添加 IpHeaders.CONNECTION_ID header 以针对特定客户端。

要广播，请为每个连接 ID 发送一条消息。