Stream support

[Hugolarson]

Hi,

Thank you for this library.
Have a question how to accomplish this with it.

I dont want to write to ByteArrayOutputStream and then send it.

URL url = new URL(urlStr);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

ObjectOutputStream objOut = new ObjectOutputStream(new BufferedOutputStream(urlConnection.getOutputStream()));
objOut.writeObject("Hello");

objOut.flush();
objOut.close();