springboot feign 攔截器 RequestInterceptor,攔截feign請求

spring boot 版本  2.2.2.RELEASE
spring cloud版本 Hoxton.SR1

攔截feign的請求

package cn.zhangfusheng.base.feign.interceptor;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

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

/**
 * @author fusheng.zhang
 * @Description feign 攔截器
 * @create 2020-04-16 11:04:00
 */
@Slf4j
@Component
public class FeignRequestInterceptor implements RequestInterceptor {

    @Override
    public void apply(RequestTemplate template) {
        try {
            RequestAttributes requestAttributes = RequestContextHolder.currentRequestAttributes();
            ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) requestAttributes;
            HttpServletRequest httpServletRequest = servletRequestAttributes.getRequest();
            Enumeration<String> headerNames = httpServletRequest.getHeaderNames();
            while (headerNames.hasMoreElements()) {
                String name = headerNames.nextElement();
                template.header(name, httpServletRequest.getHeader(name));
            }
        } catch (Exception e) {
            log.error("服務之間的調用,處理請求頭髮生異常:{}", e.getMessage(), e);
        }
    }
}