summaryrefslogtreecommitdiffstats
path: root/Lib/encodings/quopri_codec.py
blob: 9243fc443b02180888cc3be1d9e029b6779e0d5d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
"""Codec for quoted-printable encoding.

This codec de/encodes from bytes to bytes and is therefore usable with
bytes.transform() and bytes.untransform().
"""

import codecs
import quopri
from io import BytesIO

def quopri_encode(input, errors='strict'):
    assert errors == 'strict'
    f = BytesIO(input)
    g = BytesIO()
    quopri.encode(f, g, 1)
    return (g.getvalue(), len(input))

def quopri_decode(input, errors='strict'):
    assert errors == 'strict'
    f = BytesIO(input)
    g = BytesIO()
    quopri.decode(f, g)
    return (g.getvalue(), len(input))

class Codec(codecs.Codec):
    def encode(self, input, errors='strict'):
        return quopri_encode(input, errors)
    def decode(self, input, errors='strict'):
        return quopri_decode(input, errors)

class IncrementalEncoder(codecs.IncrementalEncoder):
    def encode(self, input, final=False):
        return quopri_encode(input, self.errors)[0]

class IncrementalDecoder(codecs.IncrementalDecoder):
    def decode(self, input, final=False):
        return quopri_decode(input, self.errors)[0]

class StreamWriter(Codec, codecs.StreamWriter):
    charbuffertype = bytes

class StreamReader(Codec, codecs.StreamReader):
    charbuffertype = bytes

# encodings module API

def getregentry():
    return codecs.CodecInfo(
        name='quopri',
        encode=quopri_encode,
        decode=quopri_decode,
        incrementalencoder=IncrementalEncoder,
        incrementaldecoder=IncrementalDecoder,
        streamwriter=StreamWriter,
        streamreader=StreamReader,
    )