在WebSocketHandler中访问HTTP会话(Spring-websocket)

Question

亲爱的，我正试着在我的WebSocketHandler里装个HTTPSession。当我使用'javax.websocket-api‘的时候，我可以成功地做到这一点，但我现在使用的是'Spring-Websocket’。

配置：

@ConditionalOnWebApplication
@Configuration
@EnableWebSocket
public class WebSocketConfigurator implements WebSocketConfigurer {

    @Autowired
    private ApplicationContext context;

    @Override
    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
        MyEndpoint endpoint = context.getBean(MyEndpoint.class);
        registry.addHandler(endpoint, "/signaling");
    }
}

连接建立后：

    @Component
    public class MyEndpoint implements WebSocketHandler {

        private WebSocketSession wsSession;

        @Override
        public void afterConnectionEstablished(WebSocketSession webSocketSession) throws Exception {
            this.wsSession = webSocketSession;
            // need to get the HTTP SESSION HERE        
            log.info("Opening: " + webSocketSession.getId());
        }
    }

现在这是一个我如何使用'javax.websocket-api‘来实现它的例子：

配置：

@ServerEndpoint(value = "/signaling", //
        decoders = MessageDecoder.class, //
        encoders = MessageEncoder.class,
        configurator = MyEndpointConfigurator.class)
/***
 * define signaling endpoint         
 */
public class MyEndpoint extends NextRTCEndpoint {

}

然后我注入了修改握手的HTTPSession：

public class MyEndpointConfigurator extends ServerEndpointConfig.Configurator {
    @Override
    public void modifyHandshake(ServerEndpointConfig config,
            HandshakeRequest request,
            HandshakeResponse response) {
        HttpSession httpSession = (HttpSession) request.getHttpSession();
        config.getUserProperties().put(HttpSession.class.getName(), httpSession);
    }
}

最后，当WS连接建立时，它是可访问的：

    @OnOpen
    public void onOpen(Session session, EndpointConfig config) {
        this.wsSession = session;
        this.httpSession = (HttpSession) config.getUserProperties().get(HttpSession.class.getName());
        log.info("Opening: " + session.getId());

        server.register(session, httpSession);
    }

我不能用'Spring Websocket‘成功做类似的事情。有什么解决方案吗？请不要建议使用StompJS中的类，因为我没有使用它。

Answer 1

这里有一个可以使用的：

**
 * An interceptor to copy information from the HTTP session to the "handshake
 * attributes" map to made available via{@link WebSocketSession#getAttributes()}.
 *
 * <p>Copies a subset or all HTTP session attributes and/or the HTTP session id
 * under the key {@link #HTTP_SESSION_ID_ATTR_NAME}.
 *
 * @author Rossen Stoyanchev
 * @since 4.0
 */
public class HttpSessionHandshakeInterceptor implements HandshakeInterceptor {

Reference Manual中有一个如何配置它的示例：

@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
    registry.addHandler(new MyHandler(), "/myHandler")
        .addInterceptors(new HttpSessionHandshakeInterceptor());
}

因此，您从HTTP session中需要的任何东西都将在WebSocketSession.getAttributes()中可用。