-- |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
-- |@'MIMEType' \"major\" \"minor\" [(\"name\", \"value\")]@
-- represents \"major\/minor; name=value\".
data MIMEType = MIMEType {
- mtMajor :: String
- , mtMinor :: String
- , mtParams :: [ (String, String) ]
+ mtMajor :: !String
+ , mtMinor :: !String
+ , mtParams :: ![ (String, String) ]
} deriving (Eq)
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 []
-
--- |\<\:\> appends a @(name, value)@ pair to a MIME Type.
-(<:>) :: MIMEType -> (String, String) -> MIMEType
-mt@(MIMEType _ _ params) <:> pair
- = mt {
- mtParams = mtParams mt ++ [pair]
- }
-
--- |\<\=\> 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 $
+mimeTypeP = allowEOF $!
do maj <- token
char '/'
min <- token
return (name, value)
mimeTypeListP :: Parser [MIMEType]
-mimeTypeListP = allowEOF $ listOf mimeTypeP
+mimeTypeListP = allowEOF $! listOf mimeTypeP