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authorRaúl Benencia <rul@kalgan.cc>2013-09-05 19:36:33 -0300
committerRaúl Benencia <rul@kalgan.cc>2013-09-05 19:36:33 -0300
commit41b53ca04b6d52457f331930e8fea68416498882 (patch)
treeee63ce86ab4d9a4fc09637a0d5d4015e9f3c9956 /Rfc1342.hs
parent84fa12fef1736d04ee79e40cebaadadda262f063 (diff)
New project tree structure
Diffstat (limited to 'Rfc1342.hs')
-rw-r--r--Rfc1342.hs57
1 files changed, 0 insertions, 57 deletions
diff --git a/Rfc1342.hs b/Rfc1342.hs
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--- a/Rfc1342.hs
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-{- A simple RFC1342 decoder.
- -
- - Copyright 2013 Raúl Benencia <rul@kalgan.cc>
- -
- - Licensed under the GNU GPL version 3 or higher
- -
- -}
-module Rfc1342 (decodeField) where
-
-import qualified Codec.Binary.Base64 as B64
-import qualified Codec.Binary.QuotedPrintable as QP
-
-import Data.Char (toLower, isSpace, chr)
-import Data.List(isPrefixOf)
-import Data.Word (Word8)
-
-import Data.Encoding(decodeString)
-
--- Encoding imports. If you want to support more encodings, just add'em here.
-import Data.Encoding.UTF8
-import Data.Encoding.ISO88591
-import Data.Encoding.ISO88592
-import Data.Encoding.ISO88598
-import Data.Encoding.ISO88599
-
-decodeField :: String -> String
-decodeField ('=':'?':cs) = decodeWithCharset dec rest
- where (encoding, rest) = span (\c -> c /= '?') cs
- dec = case (map toLower encoding) of
- "utf-8" -> decodeString UTF8
- "iso-8859-1" -> decodeString ISO88591
- "iso-8859-2" -> decodeString ISO88592
- "iso-8859-8" -> decodeString ISO88598
- "iso-8859-9" -> decodeString ISO88599
- _ -> id
-decodeField [] = []
-decodeField (c:cs) = c:decodeField cs
-
-decodeWithCharset dec [] = []
-decodeWithCharset dec ('?':c:'?':cs) | toLower c == 'b' = dataDecodeWith B64.decode
- | toLower c == 'q' = dataDecodeWith QP.decode
- | otherwise = cs
- where (encoded, rest') = span (\c -> c /= '?') cs
- rest = if "?=" `isPrefixOf` rest'
- then drop 2 rest'
- else rest'
- dataDecodeWith datadec = (_2spc . dec . unwrap . datadec $ encoded) ++ decodeField rest -- ++ (decodeField $ dropWhile isSpace rest)
-
-unwrap :: Maybe [Word8] -> String
-unwrap Nothing = []
-unwrap (Just str) = bytesToString str
-
-bytesToString :: [Word8] -> String
-bytesToString = map (chr . fromIntegral)
-
--- Sometimes an underscore represents the SPACE character
-_2spc = map (\x -> if x == '_' then ' ' else x) \ No newline at end of file
nihil fit ex nihilo