SpringBoot 2 Feign内部调用时带上请求头(header)信息

最新推荐文章于 2025-06-04 15:30:33 发布

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#SpringBoot 2 #SpringCloud

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本文介绍了解决Feign内部模块调用时Token信息丢失的问题，通过配置FeignConfiguration类，确保请求头信息在跨模块调用时能够完整传递，避免了因Token缺失导致的数据保存不全问题。

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项目中经常涉及内部模块之间的相互调用，导致在用A模块调用B模块的方法时，请求头里面的token信息传递不到B模块，从而获取不到用户信息，导致保存数据时，保存的数据不全，根据网上一些博客写此篇博客以作记录，代码中如有错漏之处，请各位大神海涵!
（下面的操作步骤没关系，只要有就可以）

1.Configuration代码

package com.xxx.demo;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.Enumeration;

/**
 * @description: Feign内部调用时带上请求头信息
 * @author: xxx
 * @create: 2019-08-09 10:02
 * 注意：要去yml里面改变hystrix Feign的隔离策为strategy: SEMAPHORE
 **/
@Configuration
public class FeignConfiguration implements RequestInterceptor {

    @Override
    public void apply(RequestTemplate template) {
        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);
                template.header(name, values);
            }
        }
        Enumeration<String> bodyNames = request.getParameterNames();
        StringBuffer body =new StringBuffer();
        if (bodyNames != null) {
            while (bodyNames.hasMoreElements()) {
                String name = bodyNames.nextElement();
                String values = request.getParameter(name);
                body.append(name).append("=").append(values).append("&");
            }
        }
        if(body.length()!=0) {
            body.deleteCharAt(body.length()-1);
            template.body(body.toString());
        }
    }
}

2.yml配置

feign:
  hystrix:
    enabled: true
  client:
    config:
      default:
        connectTimeout: 60000
        readTimeout: 60000

hystrix:
  command:
    default:
      execution:
        timeout:
          enabled: true
        isolation:
          strategy: SEMAPHORE
          thread:
            timeoutInMilliseconds: 60000

3.Feignclient调用的时候指定configuration

package com.xxx.service;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.util.Map;

@FeignClient(name = "device", configuration = FeignConfiguration.class)
public interface MonitorNetService {

    @RequestMapping(value = "api/monitorNetImport", method = RequestMethod.POST)
    public Map<String, Object> monitorNetImport(@RequestBody Map<String, String> params);
}