code: public static InputStream doPOST(URL url, String data) throws IOException
  	{
  		return doPOST(url,data,DEFAULT_CONNECTION_TIMEOUT);
  	}
docs: Do a POST to a URL and return the response stream for further processing elsewhere.
  <p>
  The caller is responsible to close the returned InputStream not to cause
  resource leaks.
  @param url  the input URL to be read
  @param data the post data
  @return an {@link InputStream} of response
  @throws IOException due to an error opening the URL