private void sendAsChunked(OutputStream outputStream, PrintWriter pw) throws IOException {
            pw.print("Transfer-Encoding: chunked\r\n");
            pw.print("\r\n");
            pw.flush();
            int BUFFER_SIZE = 16 * 1024;
            byte[] CRLF = "\r\n".getBytes();
            byte[] buff = new byte[BUFFER_SIZE];
            int read;
            while ((read = data.read(buff)) > 0) {
                outputStream.write(String.format("%x\r\n", read).getBytes());
                outputStream.write(buff, 0, read);
                outputStream.write(CRLF);
            }
            outputStream.write(String.format("0\r\n\r\n").getBytes());
        }