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.requ

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国家一级键盘手操作表演艺术家 · 2021-02-04 14:59:24 发布

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 {

    @Override
    public 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 {

    @Override
    public 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-length
                if (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?