diff options
author | Don Stewart <dons@galois.com> | 2008-01-04 16:23:04 -0800 |
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committer | Don Stewart <dons@galois.com> | 2008-01-04 16:23:04 -0800 |
commit | 35f0f40cfabeb49b468c6ae3c68fedded145a022 (patch) | |
tree | 0d4fa2b367a987c86ef5c14a06b7b91aee2dc6a7 /MIME/Decode.hs | |
parent | 62e3911810c18e77a13794cb5899a9ebc6b0bbb3 (diff) |
Move MIME stuff into proper Codec.* namespace.
Add copyrights where missing.
Diffstat (limited to 'MIME/Decode.hs')
-rw-r--r-- | MIME/Decode.hs | 56 |
1 files changed, 0 insertions, 56 deletions
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 - - |