_header_value_parser.py 文件源码

def get_value(value):
    """ quoted-string / attribute

    """
    v = Value()
    if not value:
        raise errors.HeaderParseError("Expected value but found end of string")
    leader = None
    if value[0] in CFWS_LEADER:
        leader, value = get_cfws(value)
    if not value:
        raise errors.HeaderParseError("Expected value but found "
                                      "only {}".format(leader))
    if value[0] == '"':
        token, value = get_quoted_string(value)
    else:
        token, value = get_extended_attribute(value)
    if leader is not None:
        token[:0] = [leader]
    v.append(token)
    return v, value