code: def check_service(service):
      
      # Try HTTP
      service.add_tag('header_scan')
      http = False
      try:
          result = requests.head('http://{}:{}'.format(service.address, service.port), timeout=1)
          print_success("Found http service on {}:{}".format(service.address, service.port))
          service.add_tag('http')
          http = True
          try:
              service.banner = result.headers['Server']
          except KeyError:
              pass
      except (ConnectionError, ConnectTimeout, ReadTimeout, Error):
          pass
  
      if not http:
          # Try HTTPS
          try:
              result = requests.head('https://{}:{}'.format(service.address, service.port), verify=False, timeout=3)
              service.add_tag('https')
              print_success("Found https service on {}:{}".format(service.address, service.port))
              try:
                  service.banner = result.headers['Server']
              except KeyError:
                  pass
          except (ConnectionError, ConnectTimeout, ReadTimeout, Error):
              pass
      service.save()
docs: Connect to a service to see if it is a http or https server.