text: #!/usr/bin/env python
  
  """
  An RFC-4217 asynchronous FTPS server supporting both SSL and TLS.
  Requires PyOpenSSL module (http://pypi.python.org/pypi/pyOpenSSL).
  """
  
  from pyftpdlib.servers import FTPServer
  from pyftpdlib.authorizers import DummyAuthorizer
  from pyftpdlib.handlers import TLS_FTPHandler,FTPHandler
  
  
  def main():
      authorizer = DummyAuthorizer()
      authorizer.add_user('user', '12345', '.', perm='elradfmw')
      authorizer.add_anonymous('.')
      handler = TLS_FTPHandler
      handler.certfile = 'keycert.pem'
      handler.authorizer = authorizer
      # requires SSL for both control and data channel
      #handler.tls_control_required = True
      #handler.tls_data_required = True
      server = FTPServer(('', 21), handler)
      server.serve_forever()
  
  if __name__ == '__main__':
      main()
  