private URL buildSearchString(String searchString)
	{
		URL result = null;
		try
		{
			searchString = URLEncoder.encode(searchString, CHARSET).replaceAll("[ \t\n\f\r]", "+");
			String url = URL + URL_ARG_SEARCH + searchString + URL_ARGS + URL_ARG_AUTH;
			_logger.debug(url);
			result = new URL(url);
		}
		catch (UnsupportedEncodingException e)
		{
			_logger.fatal(e.getMessage(), e);
			e.printStackTrace();
		}
		catch (MalformedURLException e)
		{
			_logger.fatal(e.getMessage(), e);
			e.printStackTrace();
		}
		return result;
	}