simple-gateway-route-service

RoutesWithLoggingFilter.java

@Bean
public RouteLocator customRouteLocator(RouteLocatorBuilder builder, SimpleLoggingFilter loggingFilter) {
    return builder.routes()
            .route(r ->
                    r.header(FORWARDED_URL, ".*")
                            .and()
                            .header(PROXY_METADATA, ".*")
                            .and()
                            .header(PROXY_SIGNATURE, ".*")
                            .filters(f -> f.add(loggingFilter))
                            .uri("http://google.com:80"))
            .build();
}

SimpleLoggingFilter.java

@Component
public class SimpleLoggingFilter implements GatewayFilter {

    private static final Logger log = LoggerFactory.getLogger(SimpleLoggingFilter.class);

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("Method:{} Host:{} Path:{} QueryParams:{}",
                exchange.getRequest().getMethod(),
                exchange.getRequest().getURI().getHost(),
                exchange.getRequest().getURI().getPath(),
                exchange.getRequest().getQueryParams());
        return chain.filter(exchange);
    }
}