code: def stop_serve_forever(self):
          
          assert hasattr(
              self, "stop_request"
          ), "serve_forever_stoppable() must be called before"
          assert not self.stop_request, "stop_serve_forever() must only be called once"
  
          #        # Flag stop request
          self.stop_request = True
          time.sleep(0.1)
          if self.stopped:
              # _logger.info "stop_serve_forever() 'stopped'."
              return
  
          # Add a do_SHUTDOWN method to to the ExtHandler class
          def _shutdownHandler(self):
              """Send 200 OK response, and set server.stop_request to True.
  
              http://code.activestate.com/recipes/336012/
              """
              #            _logger.info "Handling do_SHUTDOWN request"
              self.send_response(200)
              self.end_headers()
              self.server.stop_request = True
  
          if not hasattr(ExtHandler, "do_SHUTDOWN"):
              ExtHandler.do_SHUTDOWN = _shutdownHandler
  
          # Send request, so socket is unblocked
          (host, port) = self.server_address
          #        _logger.info "stop_serve_forever() sending {}:{}/ SHUTDOWN...".format(host, port)
          conn = http_client.HTTPConnection("{}:{}".format(host, port))
          conn.request("SHUTDOWN", "/")
          #        _logger.info "stop_serve_forever() sent SHUTDOWN request, reading response..."
          conn.getresponse()
          #        _logger.info "stop_serve_forever() received SHUTDOWN response."
          assert self.stop_request
docs: Stop serve_forever_stoppable().