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//lib64/python3.12/email/encoders.py

# Copyright (C) 2001-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org

"""Encodings and related functions."""

__all__ = [
    'encode_7or8bit',
    'encode_base64',
    'encode_noop',
    'encode_quopri',
    ]


from base64 import encodebytes as _bencode
from quopri import encodestring as _encodestring


def _qencode(s):
    enc = _encodestring(s, quotetabs=True)
    # Must encode spaces, which quopri.encodestring() doesn't do
    return enc.replace(b' ', b'=20')


def encode_base64(msg):
    """Encode the message's payload in Base64.

    Also, add an appropriate Content-Transfer-Encoding header.
    """
    orig = msg.get_payload(decode=True)
    encdata = str(_bencode(orig), 'ascii')
    msg.set_payload(encdata)
    msg['Content-Transfer-Encoding'] = 'base64'


def encode_quopri(msg):
    """Encode the message's payload in quoted-printable.

    Also, add an appropriate Content-Transfer-Encoding header.
    """
    orig = msg.get_payload(decode=True)
    encdata = _qencode(orig)
    msg.set_payload(encdata)
    msg['Content-Transfer-Encoding'] = 'quoted-printable'


def encode_7or8bit(msg):
    """Set the Content-Transfer-Encoding header to 7bit or 8bit."""
    orig = msg.get_payload(decode=True)
    if orig is None:
        # There's no payload.  For backwards compatibility we use 7bit
        msg['Content-Transfer-Encoding'] = '7bit'
        return
    # We play a trick to make this go fast.  If decoding from ASCII succeeds,
    # we know the data must be 7bit, otherwise treat it as 8bit.
    try:
        orig.decode('ascii')
    except UnicodeError:
        msg['Content-Transfer-Encoding'] = '8bit'
    else:
        msg['Content-Transfer-Encoding'] = '7bit'


def encode_noop(msg):
    """Do nothing."""

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architecture.rst	9.34 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
base64mime.py	3.47 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
charset.py	16.66 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
contentmanager.py	10.34 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
encoders.py	1.74 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
errors.py	3.72 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
feedparser.py	22.26 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
generator.py	20.33 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
header.py	23.53 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
headerregistry.py	20.33 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
iterators.py	2.08 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
message.py	47.08 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
parser.py	4.86 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
policy.py	10.37 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
quoprimime.py	9.63 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
utils.py	15.69 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
_encoded_words.py	8.34 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
_header_value_parser.py	108.52 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
_parseaddr.py	17.40 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
_policybase.py	15.17 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive
__init__.py	1.72 KB	lrw-r--r--	2025-10-09 11:07:00	Edit Download recursive recursive

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