public static String read_file_from_URL(String url){
		try{
		  URL target_url = new URL(url);
		  BufferedReader in = new BufferedReader(
		        new InputStreamReader(
		        target_url.openStream()));
 
		  StringBuffer sb = new StringBuffer();
		  String inputLine;
 
		  while ((inputLine = in.readLine()) != null){
				sb.append(inputLine);
				sb.append(" ");
		  }
		  return sb.toString();
		}catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		}
		return null;
	}