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Marc-André Lemburg2d920412001-05-15 12:00:02 +00001""" Python 'base64_codec' Codec - base64 content transfer encoding
2
3 Unlike most of the other codecs which target Unicode, this codec
4 will return Python string objects for both encode and decode.
5
6 Written by Marc-Andre Lemburg (mal@lemburg.com).
7
8"""
9import codecs, base64
10
11### Codec APIs
12
13def base64_encode(input,errors='strict'):
14
15 """ Encodes the object input and returns a tuple (output
16 object, length consumed).
17
18 errors defines the error handling to apply. It defaults to
19 'strict' handling which is the only currently supported
20 error handling for this codec.
21
22 """
23 assert errors == 'strict'
24 output = base64.encodestring(input)
25 return (output, len(input))
26
27def base64_decode(input,errors='strict'):
28
29 """ Decodes the object input and returns a tuple (output
30 object, length consumed).
31
32 input must be an object which provides the bf_getreadbuf
33 buffer slot. Python strings, buffer objects and memory
34 mapped files are examples of objects providing this slot.
35
36 errors defines the error handling to apply. It defaults to
37 'strict' handling which is the only currently supported
38 error handling for this codec.
39
40 """
41 assert errors == 'strict'
42 output = base64.decodestring(input)
43 return (output, len(input))
44
45class Codec(codecs.Codec):
46
Marc-André Lemburg26e3b682001-09-20 10:33:38 +000047 def encode(self, input,errors='strict'):
48 return base64_encode(input,errors)
49 def decode(self, input,errors='strict'):
50 return base64_decode(input,errors)
Marc-André Lemburg2d920412001-05-15 12:00:02 +000051
52class StreamWriter(Codec,codecs.StreamWriter):
53 pass
54
55class StreamReader(Codec,codecs.StreamReader):
56 pass
57
58### encodings module API
59
60def getregentry():
61
62 return (base64_encode,base64_decode,StreamReader,StreamWriter)