def set_default_host(cls, value):
        """
        Default: "http://127.0.0.1:80"

        A string that will be automatically included at the beginning of the url generated for doing each http request.
        """
        if value is None:
            cls.DEFAULT_HOST = "http://127.0.0.1:80"
        else:
            scheme, host, port = get_hostname_parameters_from_url(value)
            cls.DEFAULT_HOST = "%s://%s:%s" % (scheme, host, port)