RouteServiceForwardingFilter.java

@Component
public class RouteServiceForwardingFilter implements GatewayFilter {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        try {
            String forwardUrl = exchange.getRequest().getHeaders().get(FORWARDED_URL).get(0);
            exchange.getAttributes().put(GATEWAY_REQUEST_URL_ATTR, new URI(forwardUrl));
            return chain.filter(exchange);
        } catch (URISyntaxException e) {
            exchange.getResponse().setStatusCode(HttpStatus.INTERNAL_SERVER_ERROR);
            return Mono.empty();
        }
    }
}