"""Codec for quoted-printable encoding.
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Like base64 and rot13, this returns Python strings, not Unicode.
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"""
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import codecs, quopri
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try:
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from cStringIO import StringIO
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except ImportError:
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from StringIO import StringIO
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def quopri_encode(input, errors='strict'):
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"""Encode the input, returning a tuple (output object, length consumed).
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errors defines the error handling to apply. It defaults to
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'strict' handling which is the only currently supported
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error handling for this codec.
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"""
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assert errors == 'strict'
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# using str() because of cStringIO's Unicode undesired Unicode behavior.
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f = StringIO(str(input))
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g = StringIO()
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quopri.encode(f, g, 1)
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output = g.getvalue()
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return (output, len(input))
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def quopri_decode(input, errors='strict'):
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"""Decode the input, returning a tuple (output object, length consumed).
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errors defines the error handling to apply. It defaults to
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'strict' handling which is the only currently supported
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error handling for this codec.
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"""
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assert errors == 'strict'
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f = StringIO(str(input))
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g = StringIO()
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quopri.decode(f, g)
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output = g.getvalue()
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return (output, 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 quopri_encode(input,errors)
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def decode(self, input,errors='strict'):
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return quopri_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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return quopri_encode(input, self.errors)[0]
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class IncrementalDecoder(codecs.IncrementalDecoder):
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def decode(self, input, final=False):
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return quopri_decode(input, self.errors)[0]
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class StreamWriter(Codec, codecs.StreamWriter):
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pass
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class StreamReader(Codec,codecs.StreamReader):
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pass
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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='quopri',
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encode=quopri_encode,
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decode=quopri_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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