def calc_web_address(domain_name: str=None,
                     port: str=None,
                     local_location: str=None,
                     http: bool=None,
                     ) -> str:
    if not domain_name or not port:
        return
    if http:
        web_address = f'http://{domain_name}'
        test_port = '80'
    else:
        web_address = f'https://{domain_name}'
        test_port = '443'
    if port != test_port:
        web_address += f':{port}'
    if local_location:
        web_address += local_location
    return web_address