text: import socket
  from gevent.wsgi import WSGIServer
  
  import signal
  from gevent import signal as gevent_signal
  from chaussette.util import create_socket
  
  
  class Server(WSGIServer):
  
      address_family = socket.AF_INET
      socket_type = socket.SOCK_STREAM
  
      def __init__(self, listener, application=None, backlog=None,
                   spawn='default', log='default', handler_class=None,
                   environ=None, socket_type=socket.SOCK_STREAM,
                   address_family=socket.AF_INET, graceful_timeout=None,
                   **ssl_args):
          host, port = listener
          self.socket = create_socket(host, port, self.address_family,
                                      self.socket_type, backlog=backlog)
          self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
          self.server_address = self.socket.getsockname()
  
          if graceful_timeout is not None:
              self.stop_timeout = graceful_timeout
              gevent_signal(signal.SIGTERM, self.stop)
  
          super(Server, self).__init__(self.socket, application, None, spawn,
                                       log, handler_class, environ, **ssl_args)
  