code: @Override
      public String getContentType() {
  	URLConnection connection = null;
  	try {
  	    connection = url.openConnection();
  	}
  	catch (IOException e) {}
  	if (connection == null) return DEFAULT_CONTENT_TYPE;
  
  	return connection.getContentType();
  
      }
docs: Returns the value of the URL content-type header field