springcloud gateway 获取post请求的请求体和返回的响应内容

最新推荐文章于 2025-06-17 12:29:56 发布

原创

最新推荐文章于 2025-06-17 12:29:56 发布 · 2w 阅读

11 ·

CC 4.0 BY-SA版权

本文介绍如何在SpringCloud Gateway中处理POST请求的请求体和响应内容。通过实现GlobalFilter，重写响应和请求，实现了获取下游微服务的响应内容并进行操作，以及读取POST请求体。同时，指出了在处理请求体时需注意的只允许读取一次的问题，并提供了解决方案。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1. 获取post请求的下游微服务返回的响应内容：

import java.nio.charset.Charset;
import org.reactivestreams.Publisher;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.core.io.buffer.DataBufferUtils;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.http.server.reactive.ServerHttpResponseDecorator;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import lombok.extern.slf4j.Slf4j;

@Component
@Slf4j
public class WrapperResponseGlobalFilter implements GlobalFilter, Ordered {
   @Override
public int getOrder() {
//-1 is response write filter, must be called before that
return -2;
}

@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
   //获取response的返回数据
ServerHttpResponse originalResponse = exchange.getResponse();
DataBufferFactory bufferFactory = originalResponse.bufferFactory();
ServerHttpResponseDecorator decoratedResponse = new ServerHttpResponseDecorator(originalResponse) {
   @Override
public Mono<Void> writeWith(Publisher<? extends DataBuffer> body) {
if (getStatusCode().equals(HttpStatus.OK) && body instanceof Flux) {
Flux<? extends DataBuffer> fluxBody = Flux.from(body);