*/
        private void writeContent(final Supplier<InputStream> handler) {
            try (BufferedInputStream bis = new BufferedInputStream(handler.get());
                    ContentOutputStream dfos = new ContentOutputStream(threshold, Curl.tmpDir)) {
                final byte[] bytes = new byte[4096];
                int length = bis.read(bytes);
                while (length != -1) {
                    if (length != 0) {