Function _validate_xtext

Lib/email/_header_value_parser.py:1021–1029

If input token contains ASCII non-printables, register a defect.

(xtext)

    re.escape(''.join(EXTENDED_ATTRIBUTE_ENDS)))).match

def _validate_xtext(xtext):
    """If input token contains ASCII non-printables, register a defect."""

    non_printables = _non_printable_finder(xtext)
    if non_printables:
        xtext.defects.append(errors.NonPrintableDefect(non_printables))
    if utils._has_surrogates(xtext):
        xtext.defects.append(errors.UndecodableBytesDefect(
            "Non-ASCII characters found in header token"))

def _get_ptext_to_endchars(value, endchars):
    """Scan printables/quoted-pairs until endchars and return unquoted ptext.