docs: public static String execute(HttpURLConnection conn, String charsetName) throws IOException {
  		StringBuilder sb = new StringBuilder();
  		InputStreamReader reader;
  		if (charsetName == null) {
  			reader = new InputStreamReader(conn.getInputStream());
  		}
  		else {
  			reader = new InputStreamReader(conn.getInputStream(), charsetName);
  		}
  		BufferedReader in = new BufferedReader(reader);
  		String str;
  		while ((str = in.readLine()) != null) {
  			if (sb.length() > 0) {
  				sb.append('\n');
  			}
  			sb.append(str);
  		}
  		in.close();
  		conn.disconnect();
  		return sb.toString();
  	}