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