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"""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,
)
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