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