feign调用之请求头的数据

request的header信息在通过feign调用的时候，不能直接传过去，可以写一个拦截器，给他发过去，但是中间出了个小bug，报错too many bytes written，经百度，找了如下https://blog.csdn.net/qq_39986681/article/details/107138740解决，最后的参考代码如下

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);
                if (name.equals("content-length")){
                    continue;
                }
                requestTemplate.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);
            requestTemplate.body(body.toString());
//            log.info("feign interceptor body:{}",body.toString());
        }
//        log.info("feign interceptor method:{}",request.getMethod());
    }
}