我爱java系列---【微服务中feign拦截器的使用】

@Component
public class FeignInterceptor implements RequestInterceptor {

    @Override
    public void apply(RequestTemplate requestTemplate) {

        RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();

        if (requestAttributes!=null){

            HttpServletRequest request = ((ServletRequestAttributes) requestAttributes).getRequest();
            if (request!=null){
                Enumeration<String> headerNames = request.getHeaderNames();
                if (headerNames!=null){
                    while (headerNames.hasMoreElements()){
                        String headerName = headerNames.nextElement();
                        if (headerName.equals("authorization")){
                            String headerValue = request.getHeader(headerName);//Bearer jwt
                            requestTemplate.header(headerName,headerValue);//向下传递令牌
                        }
                    }
                }
            }
        }
        }
}

@Bean
public FeignInterceptor feignInterceptor(){
    return new FeignInterceptor();
}