Function _get_ptext_to_endchars

Lib/email/_header_value_parser.py:1031–1061

Scan printables/quoted-pairs until endchars and return unquoted ptext. This function turns a run of qcontent, ccontent-without-comments, or dtext-with-quoted-printables into a single string by unquoting any quoted printables. It returns the string, the remaining value, and a flag t

(value, endchars)

            "Non-ASCII characters found in header token"))

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

    This function turns a run of qcontent, ccontent-without-comments, or
    dtext-with-quoted-printables into a single string by unquoting any
    quoted printables.  It returns the string, the remaining value, and
    a flag that is True iff there were any quoted printables decoded.

    """
    if not value:
        return '', '', False
    fragment, *remainder = _wsp_splitter(value, 1)
    vchars = []
    escape = False
    had_qp = False
    for pos in range(len(fragment)):
        if fragment[pos] == '\\':
            if escape:
                escape = False
                had_qp = True
            else:
                escape = True
                continue
        if escape:
            escape = False
        elif fragment[pos] in endchars:
            break
        vchars.append(fragment[pos])
    else:
        pos = pos + 1
    return ''.join(vchars), ''.join([fragment[pos:]] + remainder), had_qp

def get_fws(value):
    """FWS = 1*WSP