text: # Copyright 2015, Google Inc.
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  """The Python implementation of the GRPC interoperability test server."""
  
  import argparse
  import logging
  import time
  
  from grpc.early_adopter import implementations
  
  from interop import methods
  from interop import resources
  
  _ONE_DAY_IN_SECONDS = 60 * 60 * 24
  
  
  def serve():
    parser = argparse.ArgumentParser()
    parser.add_argument(
        '--port', help='the port on which to serve', type=int)
    parser.add_argument(
        '--use_tls', help='require a secure connection', dest='use_tls',
        action='store_true')
    args = parser.parse_args()
  
    if args.use_tls:
      private_key = resources.private_key()
      certificate_chain = resources.certificate_chain()
      server = implementations.secure_server(
          methods.SERVICE_NAME, methods.SERVER_METHODS, args.port, private_key,
          certificate_chain)
    else:
      server = implementations.insecure_server(
          methods.SERVICE_NAME, methods.SERVER_METHODS, args.port)
  
    server.start()
    logging.info('Server serving.')
    try:
      while True:
        time.sleep(_ONE_DAY_IN_SECONDS)
    except BaseException as e:
      logging.info('Caught exception "%s"; stopping server...', e)
      server.stop()
      logging.info('Server stopped; exiting.')
  
  if __name__ == '__main__':
    serve()
  