code: def options(self, *args, **kwargs):
          
          if getattr(options, 'cors', False):
              self.set_header('Access-Control-Allow-Headers',
                              'Content-Type, Authorization, '
                              'Accept, X-Requested-With')
              self.set_header('Access-Control-Allow-Methods',
                              'OPTIONS, TRACE, GET, HEAD, POST, '
                              'PUT, PATCH, DELETE')
  
          self.finish()
docs: Default OPTIONS response
  
          If the 'cors' option is True, will respond with an empty response and
          set the 'Access-Control-Allow-Headers' and
          'Access-Control-Allow-Methods' headers