如何使用spring-boot在websocket连接中访问请求？

Question

我正在尝试为graphql-java-demo设置授权，因此我必须从请求中提取Cookie，以使其可用于graphql的查询（即http请求）：

String cookie = request.getHeader("Cookie");

我通过添加获得请求

@Autowired
private HttpServletRequest request;

进入我的服务班级：

@Service
@Transactional
@Configuration
@WebListener
public class ServiceImpl extends RequestContextListener implements MyService  {
    @Autowired
    NetworkService networkService;

    // I had it previously when using just request.getHeader("Cookie");
    // @Autowired
    // private HttpServletRequest request;

    @Override
    public Optional<Foo> foo() {
        String responseContent = networkService.send(..., getCookie());
        ...
    }

    // https://stackoverflow.com/questions/24025924/java-lang-illegalstateexception-no-thread-bound-request-found-exception-in-asp
    private Optional<String> getCookie() {
        RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
        if (attributes != null) { // it's always null
            HttpServletRequest request = ((ServletRequestAttributes) attributes).getRequest();
            return Optional.ofNullable(request.getHeader("Cookie"));
        }
        return Optional.empty();
    }
}

问题是，当我启动graphql的订阅（基本上启动了websocket连接）时，我收到：

java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.

我看到了一些类似的questions，说我应该修改项目中没有的web.xml，但是我确实尝试添加（使用该问题的可接受答案）：

@Configuration
@WebListener
public class MyRequestContextListener extends RequestContextListener {
}

但以下行仍为我返回null：

RequestAttributes attributes = RequestContextHolder.getRequestAttributes();

那么如何在Spring Boot中使用websocket连接访问请求？