Spring Websocket 配置：一起使用 WebSocketMessageBrokerConfigurationSupport 和 WebSocketConfigurer - 如何？

Question

我目前正在使用该类配置我的 Spring Websocket

public class WebSocketConfig extends WebSocketMessageBrokerConfigurationSupport

现在我遇到了Spring STOMP Websockets: any way to enable permessage-deflate on server side?的建议

利用

public class SampleJettyWebSocketsApplication implements WebSocketConfigurer 

并覆盖

@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry)

和优惠

@Bean
public DefaultHandshakeHandler handshakeHandler() 

问题，WebSocketConfigurer和WebSocketMessageBrokerConfigurationSupport是什么关系？换句话说，我是否可以通过第一类的 API WebSocketMessageBrokerConfigurationSupport 以某种方式从 WebSocketConfigurer 实现添加配置，因此所有配置都保留在一个文件中？

Answer 1

WebSocketMessageBrokerConfigurationSupport 的实现是DelegatingWebSocketMessageBrokerConfiguration，它是通过@EnableWebSocketMessageBroker 配置的。您在自定义代码中只需要WebSocketMessageBrokerConfigurer 实现。而那个被注入到DelegatingWebSocketMessageBrokerConfiguration：

@Autowired(required = false)
public void setConfigurers(List<WebSocketMessageBrokerConfigurer> configurers) {

这是我的测试用例中的示例配置：

@Configuration
@EnableWebSocketMessageBroker
static class ServerConfig extends AbstractWebSocketMessageBrokerConfigurer {

    @Bean
    public DefaultHandshakeHandler handshakeHandler() {
        return new DefaultHandshakeHandler(new TomcatRequestUpgradeStrategy());
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/ws")
                .setHandshakeHandler(handshakeHandler())
                .setAllowedOrigins("http://foo.com")
                .addInterceptors(new HandshakeInterceptor() {

                    @Override
                    public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response,
                            WebSocketHandler wsHandler, Map<String, Object> attributes) throws Exception {
                        return request.getHeaders().getOrigin() != null;
                    }

                    @Override
                    public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response,
                            WebSocketHandler wsHandler, Exception exception) {

                    }

                })
                .withSockJS();
    }

    @Override
    public void configureMessageBroker(MessageBrokerRegistry configurer) {
        configurer.setApplicationDestinationPrefixes("/app")
                .enableSimpleBroker("/topic", "/queue");
    }


}