1 """Codec for quoted-printable encoding. 2 3 Like base64 and rot13, this returns Python strings, not Unicode. 4 """ 5 6 import codecs, quopri 7 try: 8 from cStringIO import StringIO 9 except ImportError: 10 from StringIO import StringIO 11 12 def quopri_encode(input, errors='strict'): 13 """Encode the input, returning a tuple (output object, length consumed). 14 15 errors defines the error handling to apply. It defaults to 16 'strict' handling which is the only currently supported 17 error handling for this codec. 18 19 """ 20 assert errors == 'strict' 21 # using str() because of cStringIO's Unicode undesired Unicode behavior. 22 f = StringIO(str(input)) 23 g = StringIO() 24 quopri.encode(f, g, 1) 25 output = g.getvalue() 26 return (output, len(input)) 27 28 def quopri_decode(input, errors='strict'): 29 """Decode the input, returning a tuple (output object, length consumed). 30 31 errors defines the error handling to apply. It defaults to 32 'strict' handling which is the only currently supported 33 error handling for this codec. 34 35 """ 36 assert errors == 'strict' 37 f = StringIO(str(input)) 38 g = StringIO() 39 quopri.decode(f, g) 40 output = g.getvalue() 41 return (output, len(input)) 42 43 class Codec(codecs.Codec): 44 45 def encode(self, input,errors='strict'): 46 return quopri_encode(input,errors) 47 def decode(self, input,errors='strict'): 48 return quopri_decode(input,errors) 49 50 class IncrementalEncoder(codecs.IncrementalEncoder): 51 def encode(self, input, final=False): 52 return quopri_encode(input, self.errors)[0] 53 54 class IncrementalDecoder(codecs.IncrementalDecoder): 55 def decode(self, input, final=False): 56 return quopri_decode(input, self.errors)[0] 57 58 class StreamWriter(Codec, codecs.StreamWriter): 59 pass 60 61 class StreamReader(Codec,codecs.StreamReader): 62 pass 63 64 # encodings module API 65 66 def getregentry(): 67 return codecs.CodecInfo( 68 name='quopri', 69 encode=quopri_encode, 70 decode=quopri_decode, 71 incrementalencoder=IncrementalEncoder, 72 incrementaldecoder=IncrementalDecoder, 73 streamwriter=StreamWriter, 74 streamreader=StreamReader, 75 ) 76
