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"""Python 'base64_codec' Codec - base64 content transfer encoding.
This codec de/encodes from bytes to bytes and is therefore usable with
bytes.transform() and bytes.untransform().
Written by Marc-Andre Lemburg (mal@lemburg.com).
"""
import codecs
import base64
### Codec APIs
def base64_encode(input, errors='strict'):
assert errors == 'strict'
return (base64.encodebytes(input), len(input))
def base64_decode(input, errors='strict'):
assert errors == 'strict'
return (base64.decodebytes(input), len(input))
class Codec(codecs.Codec):
def encode(self, input, errors='strict'):
return base64_encode(input, errors)
def decode(self, input, errors='strict'):
return base64_decode(input, errors)
class IncrementalEncoder(codecs.IncrementalEncoder):
def encode(self, input, final=False):
assert self.errors == 'strict'
return base64.encodebytes(input)
class IncrementalDecoder(codecs.IncrementalDecoder):
def decode(self, input, final=False):
assert self.errors == 'strict'
return base64.decodebytes(input)
class StreamWriter(Codec, codecs.StreamWriter):
charbuffertype = bytes
class StreamReader(Codec, codecs.StreamReader):
charbuffertype = bytes
### encodings module API
def getregentry():
return codecs.CodecInfo(
name='base64',
encode=base64_encode,
decode=base64_decode,
incrementalencoder=IncrementalEncoder,
incrementaldecoder=IncrementalDecoder,
streamwriter=StreamWriter,
streamreader=StreamReader,
)
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