docs: public static String readContent(InputStream is) {
      String ret = "";
      try {
        String line;
        BufferedReader in = new BufferedReader(new InputStreamReader(is));
        StringBuffer out = new StringBuffer();
  
        while ((line = in.readLine()) != null) {
          out.append(line).append(CARRIAGE_RETURN);
        }
        ret = out.toString();
      } catch (Exception e) {
        e.printStackTrace();
      }
  
      return ret;
    }