feign.RetryableException: too many bytes written executing POST

在使用feign的时候出现这个错误记录一下

原代码如下

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;import javax.servlet.http.HttpServletRequest;
import java.util.Enumeration;/*** ***************************************************** @Auther: * @Descipion: * @CreateDate: * *****************************************************/
public class FeignBasicAuthRequestInterceptor implements RequestInterceptor {@Overridepublic void apply(RequestTemplate requestTemplate) {ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();HttpServletRequest request = attributes.getRequest();Enumeration<String> headerNames = request.getHeaderNames();if (headerNames != null) {while (headerNames.hasMoreElements()) {String name = headerNames.nextElement();String values = request.getHeader(name);requestTemplate.header(name, values);}}}}

因为服务之间调用需要携带一些用户信息之类的所以实现了Feign的RequestInterceptor拦截器复制请求头，复制的时候是所有头都复制的,可能导致Content-length长度跟body不一致. 所以只需要判断如果是Content-length就跳过

修改后代码如下

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;import javax.servlet.http.HttpServletRequest;
import java.util.Enumeration;/*** ***************************************************** @Auther: zianY* @Descipion: TODO* @CreateDate: 2021-01-22* *****************************************************/
public class FeignBasicAuthRequestInterceptor implements RequestInterceptor {@Overridepublic void apply(RequestTemplate requestTemplate) {ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();HttpServletRequest request = attributes.getRequest();Enumeration<String> headerNames = request.getHeaderNames();if (headerNames != null) {while (headerNames.hasMoreElements()) {String name = headerNames.nextElement();String values = request.getHeader(name);// 跳过 content-lengthif (name.equals("content-length")){continue;}requestTemplate.header(name, values);}}}}

参考文章：

Feign报错feign.RetryableException: too many bytes written executing

用了这么久HTTP, 你是否了解Content-Length?

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