如何在spring云网关中获取可用滤镜列表？

import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;

@Component
public class CustomFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        // 在这里进行获取可用滤镜列表的逻辑处理
        List<String> availableFilters = exchange.getRequiredAttribute(ServerWebExchangeUtils.GATEWAY_ROUTE_ATTR)
                .getFilters().stream()
                .map(GatewayFilter::toString)
                .collect(Collectors.toList());

        // 将可用滤镜列表保存到请求的属性中，以便后续使用
        exchange.getAttributes().put("availableFilters", availableFilters);

        // 继续执行过滤器链
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        // 设置过滤器的执行顺序
        return Ordered.LOWEST_PRECEDENCE;
    }
}