Georg Brandl | 0252462 | 2010-12-02 18:06:51 +0000 | [diff] [blame] | 1 | """Codec for quoted-printable encoding. |
| 2 | |
R David Murray | e5cb836 | 2014-03-13 20:54:30 -0400 | [diff] [blame] | 3 | This codec de/encodes from bytes to bytes. |
Georg Brandl | 0252462 | 2010-12-02 18:06:51 +0000 | [diff] [blame] | 4 | """ |
| 5 | |
| 6 | import codecs |
| 7 | import quopri |
| 8 | from io import BytesIO |
| 9 | |
| 10 | def quopri_encode(input, errors='strict'): |
| 11 | assert errors == 'strict' |
| 12 | f = BytesIO(input) |
| 13 | g = BytesIO() |
Martin Panter | 06171bd | 2015-09-12 00:34:28 +0000 | [diff] [blame] | 14 | quopri.encode(f, g, quotetabs=True) |
Georg Brandl | 0252462 | 2010-12-02 18:06:51 +0000 | [diff] [blame] | 15 | return (g.getvalue(), len(input)) |
| 16 | |
| 17 | def quopri_decode(input, errors='strict'): |
| 18 | assert errors == 'strict' |
| 19 | f = BytesIO(input) |
| 20 | g = BytesIO() |
| 21 | quopri.decode(f, g) |
| 22 | return (g.getvalue(), len(input)) |
| 23 | |
| 24 | class Codec(codecs.Codec): |
| 25 | def encode(self, input, errors='strict'): |
| 26 | return quopri_encode(input, errors) |
| 27 | def decode(self, input, errors='strict'): |
| 28 | return quopri_decode(input, errors) |
| 29 | |
| 30 | class IncrementalEncoder(codecs.IncrementalEncoder): |
| 31 | def encode(self, input, final=False): |
| 32 | return quopri_encode(input, self.errors)[0] |
| 33 | |
| 34 | class IncrementalDecoder(codecs.IncrementalDecoder): |
| 35 | def decode(self, input, final=False): |
| 36 | return quopri_decode(input, self.errors)[0] |
| 37 | |
| 38 | class StreamWriter(Codec, codecs.StreamWriter): |
| 39 | charbuffertype = bytes |
| 40 | |
| 41 | class StreamReader(Codec, codecs.StreamReader): |
| 42 | charbuffertype = bytes |
| 43 | |
| 44 | # encodings module API |
| 45 | |
| 46 | def getregentry(): |
| 47 | return codecs.CodecInfo( |
| 48 | name='quopri', |
| 49 | encode=quopri_encode, |
| 50 | decode=quopri_decode, |
| 51 | incrementalencoder=IncrementalEncoder, |
| 52 | incrementaldecoder=IncrementalDecoder, |
| 53 | streamwriter=StreamWriter, |
| 54 | streamreader=StreamReader, |
Serhiy Storchaka | 94ee389 | 2014-02-24 14:43:03 +0200 | [diff] [blame] | 55 | _is_text_encoding=False, |
Georg Brandl | 0252462 | 2010-12-02 18:06:51 +0000 | [diff] [blame] | 56 | ) |