content: import logging
  
  from websockets.exceptions import WebSocketException
  from websockets.sync.server import serve
  
  
  logging.basicConfig(level=logging.WARNING)
  
  HOST, PORT = "0.0.0.0", 9003
  
  
  def echo(ws):
      try:
          for msg in ws:
              ws.send(msg)
      except WebSocketException:
          pass
  
  
  def main():
      with serve(
          echo,
          HOST,
          PORT,
          server_header="websockets.asyncio",
          max_size=2**25,
      ) as server:
          try:
              server.serve_forever()
          except KeyboardInterrupt:
              pass
  
  
  if __name__ == "__main__":
      main()
  