try (CloseableHttpResponse response = httpClient.execute(httpPost)) {
            if (response.getStatusLine().getStatusCode() != Constants.OK_STATUS_CODE) {
                logger.warn("Failed to access API extractor endpoint: url={}, statusCode={}", url,
                        response.getStatusLine().getStatusCode());
                return null;
            }

        try {
            // get a content
            final HttpResponse response = executeHttpClient(httpGet);
            httpEntity = response.getEntity();

            final int httpStatusCode = response.getStatusLine().getStatusCode();
            if (httpStatusCode == 200) {

                // check file size
                final Header contentLengthHeader = response.getFirstHeader("Content-Length");