content: package com.jiron.gateway.filter;
  
  import java.util.Collections;
  import java.util.List;
  import org.springframework.cloud.gateway.filter.GatewayFilter;
  import org.springframework.cloud.gateway.filter.GatewayFilterChain;
  import org.springframework.cloud.gateway.filter.OrderedGatewayFilter;
  import org.springframework.cloud.gateway.filter.factory.AbstractGatewayFilterFactory;
  import org.springframework.cloud.gateway.support.ServerWebExchangeUtils;
  import org.springframework.http.HttpMethod;
  import org.springframework.stereotype.Component;
  import org.springframework.web.server.ServerWebExchange;
  import reactor.core.publisher.Mono;
  
  /**
   * 获取body请求数据（解决流不能重复读取问题）
   *
   * @author ruoyi
   */
  @Component
  public class CacheRequestFilter extends AbstractGatewayFilterFactory<CacheRequestFilter.Config>
  {
      public CacheRequestFilter()
      {
          super(Config.class);
      }
  
      @Override
      public String name()
      {
          return "CacheRequestFilter";
      }
  
      @Override
      public GatewayFilter apply(Config config)
      {
          CacheRequestGatewayFilter cacheRequestGatewayFilter = new CacheRequestGatewayFilter();
          Integer order = config.getOrder();
          if (order == null)
          {
              return cacheRequestGatewayFilter;
          }
          return new OrderedGatewayFilter(cacheRequestGatewayFilter, order);
      }
  
      public static class CacheRequestGatewayFilter implements GatewayFilter
      {
          @Override
          public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain)
          {
              // GET DELETE 不过滤
              HttpMethod method = exchange.getRequest().getMethod();
              if (method == null || method == HttpMethod.GET || method == HttpMethod.DELETE)
              {
                  return chain.filter(exchange);
              }
              return ServerWebExchangeUtils.cacheRequestBodyAndRequest(exchange, (serverHttpRequest) -> {
                  if (serverHttpRequest == exchange.getRequest())
                  {
                      return chain.filter(exchange);
                  }
                  return chain.filter(exchange.mutate().request(serverHttpRequest).build());
              });
          }
      }
  
      @Override
      public List<String> shortcutFieldOrder()
      {
          return Collections.singletonList("order");
      }
  
      static class Config
      {
          private Integer order;
  
          public Integer getOrder()
          {
              return order;
          }
  
          public void setOrder(Integer order)
          {
              this.order = order;
          }
      }
  }
  