_header_value_parser.py 文件源码

def get_dot_atom_text(value):
    """ dot-text = 1*atext *("." 1*atext)

    """
    dot_atom_text = DotAtomText()
    if not value or value[0] in ATOM_ENDS:
        raise errors.HeaderParseError("expected atom at a start of "
            "dot-atom-text but found '{}'".format(value))
    while value and value[0] not in ATOM_ENDS:
        token, value = get_atext(value)
        dot_atom_text.append(token)
        if value and value[0] == '.':
            dot_atom_text.append(DOT)
            value = value[1:]
    if dot_atom_text[-1] is DOT:
        raise errors.HeaderParseError("expected atom at end of dot-atom-text "
            "but found '{}'".format('.'+value))
    return dot_atom_text, value