--- #prune
+{-# LANGUAGE
+ UnboxedTuples
+ , UnicodeSyntax
+ #-}
+{-# OPTIONS_HADDOCK prune #-}
-- |Manipulation of MIME Types.
module Network.HTTP.Lucu.MIMEType
( MIMEType(..)
- , (</>)
- , (<:>)
- , (<=>)
+ , parseMIMEType
, mimeTypeP
, mimeTypeListP
)
where
+import qualified Data.ByteString.Lazy as B
import Network.HTTP.Lucu.Parser
import Network.HTTP.Lucu.Parser.Http
import Network.HTTP.Lucu.Utils
+import Prelude hiding (min)
-- |@'MIMEType' \"major\" \"minor\" [(\"name\", \"value\")]@
-- represents \"major\/minor; name=value\".
value
-infix 9 </>, <=>
-infixl 8 <:>
+instance Read MIMEType where
+ readsPrec _ s = [(parseMIMEType s, "")]
--- |@\"major\" \<\/\> \"minor\"@ constructs a MIME Type
--- \"major\/minor\".
-(</>) :: String -> String -> MIMEType
-maj </> min
- = MIMEType maj min []
-
--- |This operator appends a @(name, value)@ pair to a MIME Type.
-(<:>) :: MIMEType -> (String, String) -> MIMEType
-mt@(MIMEType _ _ params) <:> pair
- = pair `seq`
- mt {
- mtParams = mtParams mt ++ [pair]
- }
-
--- |This operator takes two strings and makes a tuple of them. So you
--- can say
---
--- > "text" </> "xml" <:> "charset" <=> "UTF-8" <:> "q" <=> "0.9"
---
--- to represent \"text\/xml; charset=UTF-8; q=0.9\".
-(<=>) :: String -> String -> (String, String)
-name <=> value = (name, value)
+-- |Parse 'MIMEType' from a 'Prelude.String'. This function throws an
+-- exception for parse error.
+parseMIMEType :: String -> MIMEType
+parseMIMEType str = case parseStr mimeTypeP str of
+ (# Success t, r #) -> if B.null r
+ then t
+ else error ("unparsable MIME Type: " ++ str)
+ (# _ , _ #) -> error ("unparsable MIME Type: " ++ str)
mimeTypeP :: Parser MIMEType
mimeTypeP = allowEOF $!
- do maj <- token
- char '/'
- min <- token
+ do maj <- token
+ _ <- char '/'
+ min <- token
params <- many paramP
return $ MIMEType maj min params
where
paramP :: Parser (String, String)
- paramP = do many lws
- char ';'
- many lws
- name <- token
- char '='
+ paramP = do _ <- many lws
+ _ <- char ';'
+ _ <- many lws
+ name <- token
+ _ <- char '='
value <- token <|> quotedStr
return (name, value)