code: StringBuilder readBody(final InputStream inputStream) throws IOException {
          StringBuilder body = new StringBuilder();
          BufferedReader in = new BufferedReader(new InputStreamReader(inputStream));
  
          String inputLine;
          while ((inputLine = in.readLine()) != null) {
              body.append(inputLine);
          }
          in.close();
  
          return body;
      }
docs: This method is used to read a {@code InputStream} and build a body object with this stream.
  
  @param   inputStream
  {@code InputStream} the stream that will charge the body object.
  
  @return  {@code StringBuilder}
  
  @throws  IOException
  This method throws a {@code IOException} if the inputted stream isn't correctly.