Spring WebFlux 认证的 WebSocket 连接

Question

我有运行 Spring Boot@2.2.x 服务器公开了 WebSocket 端点。这是我的 WebSocketConfiguration:

@Slf4j
@Configuration
public class WebSocketConfiguration {

    private static final String WS_PATH = "/ws/notifications";

    @Bean
    public HandlerMapping webSocketHandlerMapping() {
        Map<String, WebSocketHandler> handlersMap = new HashMap<>();
        handlersMap.put(WS_PATH, session -> session.send(session.receive()
                                                                .map(WebSocketMessage::getPayloadAsText)
                                                                .doOnEach(logNext(log::info))
                                                                .map(msg -> format("notification for your msg: %s", msg))
                                                                .map(session::textMessage)));

        SimpleUrlHandlerMapping handlerMapping = new SimpleUrlHandlerMapping();
        handlerMapping.setOrder(Ordered.HIGHEST_PRECEDENCE);
        handlerMapping.setUrlMap(handlersMap);
        return handlerMapping;
    }

    @Bean
    public WebSocketHandlerAdapter handlerAdapter(WebSocketService webSocketService) {
        return new WebSocketHandlerAdapter(webSocketService);
    }

    @Bean
    public WebSocketService webSocketService() {
        return new HandshakeWebSocketService(new ReactorNettyRequestUpgradeStrategy());
    }
}

问题是如何使用 Basic Authentication 或 Bearer Authentication 或 access_token 查询参数实现建立 WS 连接的身份验证？

最好的选择是避免使用 Spring 安全。

谢谢。

Answer 1

Websocket 连接以 Upgraded 的 HTTP 请求开始。您可以在升级之前进行 JWT 令牌身份验证。在 spring 引导中，它的工作方式如下：

公开自定义 WebSocketService bean：

@Bean
public WebSocketService webSocketService(RequestUpgradeStrategy upgradeStrategy) {
    return new HandshakeWebSocketService(upgradeStrategy);
}

在你自己的class中实现RequestUpgradeStrategy接口class:

@Override
public Mono<Void> upgrade(ServerWebExchange exchange, WebSocketHandler handler, @Nullable String subProtocol, Supplier<HandshakeInfo> handshakeInfoFactory) {
    ServerHttpResponse response = exchange.getResponse();
    HttpServerResponse reactorResponse = getNativeResponse(response);
    HandshakeInfo handshakeInfo = handshakeInfoFactory.get();
    NettyDataBufferFactory bufferFactory = (NettyDataBufferFactory) response.bufferFactory();

    var authResult = validateAuth(handshakeInfo);
    if (authResult == unauthorised) return Mono.just(reactorResponse.status(rejectedStatus))
                                               .flatMap(HttpServerResponse::send);
    else return reactorResponse.sendWebsocket(subProtocol, //
                                              this.maxFramePayloadLength,//
                                              (in, out) -> {
                                                  ReactorNettyWebSocketSession session = new ReactorNettyWebSocketSession(in, out,
                                                                                                                          handshakeInfo,
                                                                                                                          bufferFactory,
                                                                                                                          this.maxFramePayloadLength);
                                                  return handler.handle(session);
                                              });
}

备注：

以上class是基于ReactorNettyRequestUpgradeStrategy。
返回reactorResponse.sendWebsocket是将连接升级为WebSocket连接的现有行为
reactorResponse.status 可以 returned 来停止正在升级的连接。例如，在未授权连接的情况下，您可以 return 401 响应。
查询参数和Authentication headers可以在握手信息中找到。如何进行身份验证本身不在问题范围内。

Spring WebFlux 认证的 WebSocket 连接

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