From 35f0f40cfabeb49b468c6ae3c68fedded145a022 Mon Sep 17 00:00:00 2001 From: Don Stewart Date: Fri, 4 Jan 2008 16:23:04 -0800 Subject: Move MIME stuff into proper Codec.* namespace. Add copyrights where missing. --- MIME/Decode.hs | 56 -------------------------------------------------------- 1 file changed, 56 deletions(-) delete mode 100644 MIME/Decode.hs (limited to 'MIME/Decode.hs') diff --git a/MIME/Decode.hs b/MIME/Decode.hs deleted file mode 100644 index f23454a..0000000 --- a/MIME/Decode.hs +++ /dev/null @@ -1,56 +0,0 @@ -module MIME.Decode where - -import Data.Char -import MIME.QuotedPrintable as QP -import MIME.Base64 as Base64 - -decodeBody :: String -> String -> String -decodeBody enc body = - case map toLower enc of - "base64" -> map (chr.fromIntegral) $ Base64.decode body - "quoted-printable" -> QP.decode body - _ -> body - --- Decoding of RFC 2047's "encoded-words' production --- (as used in email-headers and some HTTP header cases --- (AtomPub's Slug: header)) -decodeWord :: String -> Maybe (String, String) -decodeWord str = - case str of - '=':'?':xs -> - case dropLang $ break (\ch -> ch =='?' || ch == '*') xs of - (cs,_:x:'?':bs) - | isKnownCharset (map toLower cs) -> - case toLower x of - 'q' -> decodeQ cs (break (=='?') bs) - 'b' -> decodeB cs (break (=='?') bs) - _ -> Nothing - _ -> Nothing - _ -> Nothing - where - isKnownCharset cs = cs `elem` ["iso-8859-1", "us-ascii"] - - -- ignore RFC 2231 extension of permitting a language tag to be supplied - -- after the charset. - dropLang (as,'*':bs) = (as,dropWhile (/='?') bs) - dropLang (as,bs) = (as,bs) - - decodeQ cset (fs,'?':'=':rs) = Just (fromCharset cset (QP.decode fs),rs) - decodeQ _ _ = Nothing - - decodeB cset (fs,'?':'=':rs) = - Just (fromCharset cset (Base64.decodeToString fs),rs) - decodeB _ _ = Nothing - - fromCharset _cset cs = cs - -decodeWords :: String -> String -decodeWords "" = "" -decodeWords (x:xs) - | isSpace x = x : decodeWords xs - | otherwise = - case decodeWord (x:xs) of - Nothing -> x : decodeWords xs - Just (as,bs) -> as ++ decodeWords bs - - -- cgit v1.2.3