def parse_forwarded(header_value, only_standard_parameters=False):
    """
    Parse RFC7239 Forwarded header.

    :param str header_value: value to parse
    :keyword bool only_standard_parameters: if this keyword is specified
        and given a *truthy* value, then a non-standard parameter name
        will result in :exc:`~ietfparse.errors.StrictHeaderParsingFailure`
    :return: an ordered :class:`list` of :class:`dict` instances
    :raises: :exc:`ietfparse.errors.StrictHeaderParsingFailure` is
        raised if `only_standard_parameters` is enabled and a non-standard
        parameter name is encountered

    This function parses a :rfc:`7239` HTTP header into a :class:`list`
    of :class:`dict` instances with each instance containing the param
    values.  The list is ordered as received from left to right and the
    parameter names are folded to lower case strings.

    """
    result = []
    for entry in parse_list(header_value):
        param_tuples = _parse_parameter_list(entry.split(';'),
                                             normalize_parameter_names=True,
                                             normalize_parameter_values=False)
        if only_standard_parameters:
            for name, _ in param_tuples:
                if name not in ('for', 'proto', 'by', 'host'):
                    raise errors.StrictHeaderParsingFailure('Forwarded',
                                                            header_value)
        result.append(dict(param_tuples))
    return result
Parse RFC7239 Forwarded header.

    :param str header_value: value to parse
    :keyword bool only_standard_parameters: if this keyword is specified
        and given a *truthy* value, then a non-standard parameter name
        will result in :exc:`~ietfparse.errors.StrictHeaderParsingFailure`
    :return: an ordered :class:`list` of :class:`dict` instances
    :raises: :exc:`ietfparse.errors.StrictHeaderParsingFailure` is
        raised if `only_standard_parameters` is enabled and a non-standard
        parameter name is encountered

    This function parses a :rfc:`7239` HTTP header into a :class:`list`
    of :class:`dict` instances with each instance containing the param
    values.  The list is ordered as received from left to right and the
    parameter names are folded to lower case strings.