Function parse_content_transfer_encoding_header

Lib/email/_header_value_parser.py:2782–2811

mechanism

(value)

    return disp_header

def parse_content_transfer_encoding_header(value):
    """ mechanism

    """
    # We should probably validate the values, since the list is fixed.
    cte_header = ContentTransferEncoding()
    if not value:
        cte_header.defects.append(errors.HeaderMissingRequiredValue(
            "Missing content transfer encoding"))
        return cte_header
    try:
        token, value = get_token(value)
    except errors.HeaderParseError:
        cte_header.defects.append(errors.InvalidHeaderDefect(
            "Expected content transfer encoding but found {!r}".format(value)))
    else:
        cte_header.append(token)
        cte_header.cte = token.value.strip().lower()
    if not value:
        return cte_header
    while value:
        cte_header.defects.append(errors.InvalidHeaderDefect(
            "Extra text after content transfer encoding"))
        if value[0] in PHRASE_ENDS:
            cte_header.append(ValueTerminal(value[0], 'misplaced-special'))
            value = value[1:]
        else:
            token, value = get_phrase(value)
            cte_header.append(token)
    return cte_header


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