Cannot upload a file using HttpUrlConnection

Question

I am trying to upload a zip file to our server along with the params using UrlConnection. This is uploading the file but it is not sending the parameters.

Here is the code.

private static final String CRLF = "\r\n"; // Line separator required by multipart/form-data.
private static final String CHARSET_UTF_8 = "UTF-8";
private static final String TWO_HYPHENS = "--";


public static void uploadReport(String filePath) {
    File binaryFile = new File(filePath);
    String boundary = Long.toHexString(System.currentTimeMillis()); // Just generate some unique random value.
    String urlString = "https://mycompany.com/api/file/uad.json";

    HttpsURLConnection connection = null;
    DataOutputStream dataOutoutStream = null;
    try {
        URL url = new URL(urlString);
        connection = (HttpsURLConnection) url.openConnection();
        connection.setDoOutput(true);

        connection.setRequestProperty("Connection", "Keep-Alive");
        connection.setRequestProperty("Cache-Control", "no-cache");
        connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
        OutputStream output = connection.getOutputStream();
        dataOutoutStream = new DataOutputStream(output);

        // Send normal param.
        writeParameter(dataOutoutStream, boundary, "app_name", "My App Name");
        writeParameter(dataOutoutStream, boundary, "app_version", "2.04");

        // Send binary file.
        writeBinaryFile(output, dataOutoutStream, boundary, binaryFile);

        // End of multipart/form-data.
        dataOutoutStream.writeBytes("--" + boundary + "--" + CRLF);

         Log.v(tag, "response code " +  connection.getResponseCode());
    } catch(FileNotFoundException e) {
        e.printStackTrace();
    }  catch(UnsupportedEncodingException e) {
        e.printStackTrace();
    }  catch(IOException e) {
        e.printStackTrace();
    } finally {
        if (dataOutoutStream != null)
            try {
                dataOutoutStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
    }
}

Here is the code for my writeParameter method

private static void writeParameter(DataOutputStream dataOutputStream, String boundary, String paramName, String paramValue) throws IOException {
    dataOutputStream.writeBytes(TWO_HYPHENS + boundary + CRLF);
    dataOutputStream.writeBytes("Content-Disposition: form-data; name=\"" + paramName + "\"" + CRLF);
    dataOutputStream.writeBytes("Content-Type: text/plain; charset=" + CHARSET_UTF_8 + CRLF);
    dataOutputStream.writeBytes(CRLF);
    dataOutputStream.writeBytes(paramValue + CRLF);
    dataOutputStream.flush();
}

Here is the writeBinaryFile method

private static void writeBinaryFile(OutputStream output, DataOutputStream dataOutputStream, String boundary, File binaryFile) throws IOException {
        dataOutputStream.writeBytes(TWO_HYPHENS + boundary + CRLF);
        dataOutputStream.writeBytes("Content-Disposition: form-data; name=\"binaryFile\"; filename=\"" + binaryFile.getName() + "\"" + CRLF);
        dataOutputStream.writeBytes("Content-Type: " + URLConnection.guessContentTypeFromName(binaryFile.getName()) + CRLF);
        dataOutputStream.writeBytes("Content-Transfer-Encoding: binary" + CRLF);
        dataOutputStream.writeBytes(CRLF);
        dataOutputStream.flush();
        InputStream input = null;
        try {
            input = new FileInputStream(binaryFile);
            byte[] buffer = new byte[1024];
            for (int length = 0; (length = input.read(buffer)) > 0;) {
                output.write(buffer, 0, length);
            }
            // Important! Output cannot be closed. Close of writer will close output as well.
            output.flush();
        } finally {
        if (input != null) 
            input.close();
        }
        dataOutputStream.writeBytes(CRLF);
        dataOutputStream.flush();
    }

May I know what I might be doing wrong.

I did check the Stackoverflow posts here and here.