Transit from client to another server by POST multipart form

public String sendPostMultipart(HttpServletRequest request, InputStream uploadedInputStream, FormDataBodyPart body) {
        try {
            String fileName = body.getFormDataContentDisposition().getFileName();

            HttpPost httpPost = new HttpPost(ME_URL);
            httpPost.setHeader("enctype", "multipart/form-data");

            MultipartEntityBuilder builder = MultipartEntityBuilder.create();
            builder.addBinaryBody("avatar", uploadedInputStream, ContentType.create(body.getMediaType().toString(), "UTF-8"), fileName);
            Enumeration<String> parameterNames = request.getParameterNames();

            while (parameterNames.hasMoreElements()) {
                String paramName = parameterNames.nextElement();
                String paramValue = request.getParameter(paramName);
                builder.addTextBody(paramName, paramValue);
            }
            HttpEntity entity = builder.build();
            httpPost.setEntity(entity);
            CloseableHttpClient httpClient = HttpClients.createDefault();
            CloseableHttpResponse httpResponse = httpClient.execute(httpPost);
            HttpEntity responseEntity = httpResponse.getEntity();
            if (responseEntity != null) {
                json_result = EntityUtils.toString(responseEntity);
            }
        } catch (IOException ex) {
            WriteLog("[IOException] - className:" + ProcessRequest.class.getName() + " --- exception:" + ex);
        }
        return json_result;
    }