source: titan/mediathek/localhoster/lib/python2.7/email/encoders.py @ 40114

Last change on this file since 40114 was 40094, checked in by obi, 5 years ago

tithek add yoztube-dl support

File size: 2.0 KB
Line 
1# Copyright (C) 2001-2006 Python Software Foundation
2# Author: Barry Warsaw
3# Contact: email-sig@python.org
4
5"""Encodings and related functions."""
6
7__all__ = [
8    'encode_7or8bit',
9    'encode_base64',
10    'encode_noop',
11    'encode_quopri',
12    ]
13
14import base64
15
16from quopri import encodestring as _encodestring
17
18
19
20def _qencode(s):
21    enc = _encodestring(s, quotetabs=True)
22    # Must encode spaces, which quopri.encodestring() doesn't do
23    return enc.replace(' ', '=20')
24
25
26def _bencode(s):
27    # We can't quite use base64.encodestring() since it tacks on a "courtesy
28    # newline".  Blech!
29    if not s:
30        return s
31    hasnewline = (s[-1] == '\n')
32    value = base64.encodestring(s)
33    if not hasnewline and value[-1] == '\n':
34        return value[:-1]
35    return value
36
37
38
39def encode_base64(msg):
40    """Encode the message's payload in Base64.
41
42    Also, add an appropriate Content-Transfer-Encoding header.
43    """
44    orig = msg.get_payload()
45    encdata = _bencode(orig)
46    msg.set_payload(encdata)
47    msg['Content-Transfer-Encoding'] = 'base64'
48
49
50
51def encode_quopri(msg):
52    """Encode the message's payload in quoted-printable.
53
54    Also, add an appropriate Content-Transfer-Encoding header.
55    """
56    orig = msg.get_payload()
57    encdata = _qencode(orig)
58    msg.set_payload(encdata)
59    msg['Content-Transfer-Encoding'] = 'quoted-printable'
60
61
62
63def encode_7or8bit(msg):
64    """Set the Content-Transfer-Encoding header to 7bit or 8bit."""
65    orig = msg.get_payload()
66    if orig is None:
67        # There's no payload.  For backwards compatibility we use 7bit
68        msg['Content-Transfer-Encoding'] = '7bit'
69        return
70    # We play a trick to make this go fast.  If encoding to ASCII succeeds, we
71    # know the data must be 7bit, otherwise treat it as 8bit.
72    try:
73        orig.encode('ascii')
74    except UnicodeError:
75        msg['Content-Transfer-Encoding'] = '8bit'
76    else:
77        msg['Content-Transfer-Encoding'] = '7bit'
78
79
80
81def encode_noop(msg):
82    """Do nothing."""
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