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();
}