通过feign调用微服务传递header

由于我们项目开发中前台调用后台接口是要在请求头中携带token令牌的,但是通过feign调用其他微服务时敏感头信息是不会向下游微服务传递的,这时就要配置拦截器实现header的传递,代码如下:

package com.cyclothes.interceptor;


import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

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

/**
 * spirng cloud feign传递header
 *
 * @author 梁建朝
 * @date 2019/4/3
 */
@Component
public class FeignHeaderInterceptor implements RequestInterceptor {

    @Override
    public void apply(RequestTemplate template) {
        /**
         * 获取头部带盐的token
         */
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
        Enumeration headerNames = request.getHeaderNames();
        if (headerNames != null) {
            while (headerNames.hasMoreElements()) {
                String name = headerNames.nextElement();
                String values = request.getHeader(name);
                template.header(name, values);
            }
        }
    }
}