问如何计算Spring WebFlux中每个请求的总执行时间和在响应头(即x运行时)中的设置？

EN

package request.middlewares;

import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.WebFilterChain;
import reactor.core.publisher.Mono;

@Component
public class ResponseTimeCalculator implements WebFilter {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
        // is it possible here?
        exchange.getResponse().getHeaders().add("X-Runtime", "10ms");
        return chain.filter(exchange);
    }
}