Make use of mimeType quasi-quoter.

[Lucu.git] / Network / HTTP / Lucu / MIMEType.hs

diff --git a/Network/HTTP/Lucu/MIMEType.hs b/Network/HTTP/Lucu/MIMEType.hs
index bd799e0d58f840dc9cb700be51e33e19e6496057..d60b70e5d5f21d4704ee6bb269f271692d35e58e 100644 (file)
--- a/Network/HTTP/Lucu/MIMEType.hs
+++ b/Network/HTTP/Lucu/MIMEType.hs
@@ -1,78 +1,82 @@
+{-# LANGUAGE
+    DeriveDataTypeable
+  , OverloadedStrings
+  , RecordWildCards
+  , TemplateHaskell
+  , UnicodeSyntax
+  #-}
+-- |Parsing and printing MIME Media Types
+-- (<http://tools.ietf.org/html/rfc2046>).
 module Network.HTTP.Lucu.MIMEType
     ( MIMEType(..)
-    , (+/+)         -- String -> String -> MIMEType
-    , (+:+)         -- MIMEType -> (String, String) -> MIMEType
-    , (+=+)         -- String -> String -> (String, String)
-    , mimeTypeP     -- Parser MIMEType
-    , mimeTypeListP -- Parser [MIMEType]
-    )
-    where
-
-import           Network.HTTP.Lucu.Parser
-import           Network.HTTP.Lucu.Parser.Http
-import           Network.HTTP.Lucu.Utils
-
-
-data MIMEType = MIMEType {
-      mtMajor  :: String
-    , mtMinor  :: String
-    , mtParams :: [ (String, String) ]
-    } deriving (Eq)
-
-
-instance Show MIMEType where
-    show (MIMEType maj min params)
-        = maj ++ "/" ++ min ++
-          if null params then
-              ""
-          else
-              "; " ++ joinWith "; " (map showPair params)
-        where
-          showPair :: (String, String) -> String
-          showPair (name, value)
-              = name ++ "=" ++ if any (not . isToken) value then
-                                   quoteStr value
-                               else
-                                   value
-
-
-infix  9 +/+, +=+
-infixl 8 +:+
-
 
-(+/+) :: String -> String -> MIMEType
-maj +/+ min
-    = MIMEType maj min []
+    , parseMIMEType
+    , printMIMEType
 
-
-(+:+) :: MIMEType -> (String, String) -> MIMEType
-mt@(MIMEType _ _ params) +:+ pair
-    = mt {
-        mtParams = mtParams mt ++ [pair]
-      }
-
-
-(+=+) :: String -> String -> (String, String)
-name +=+ value = (name, value)
-
-
-
-mimeTypeP :: Parser MIMEType
-mimeTypeP = allowEOF $
-            do maj <- token
-               char '/'
-               min <- token
-               params <- many paramP
-               return $ MIMEType maj min params
+    , mimeType
+    , mimeTypeList
+    )
     where
-      paramP :: Parser (String, String)
-      paramP = do many lws
-                  char ';'
-                  many lws
-                  name <- token
-                  char '='
-                  value <- token <|> quotedStr
-                  return (name, value)
-
-mimeTypeListP :: Parser [MIMEType]
-mimeTypeListP = allowEOF $ listOf mimeTypeP
+import Control.Applicative
+import Data.Ascii (Ascii, AsciiBuilder, CIAscii)
+import qualified Data.Ascii as A
+import Data.Attoparsec.Char8 as P
+import Data.Monoid.Unicode
+import Data.Typeable
+import Language.Haskell.TH.Syntax
+import Network.HTTP.Lucu.MIMEParams
+import Network.HTTP.Lucu.Parser
+import Network.HTTP.Lucu.Parser.Http
+import Network.HTTP.Lucu.Utils
+import Prelude.Unicode
+
+-- |A media type, subtype, and parameters.
+data MIMEType
+    = MIMEType {
+        mtMedia  ∷ !CIAscii
+      , mtSub    ∷ !CIAscii
+      , mtParams ∷ !MIMEParams
+      }
+    deriving (Eq, Show, Read, Typeable)
+
+instance Lift MIMEType where
+    lift (MIMEType {..})
+        = [| MIMEType {
+               mtMedia  = $(liftCIAscii mtMedia)
+             , mtSub    = $(liftCIAscii mtSub)
+             , mtParams = $(lift mtParams)
+             }
+           |]
+
+-- |Convert a 'MIMEType' to an 'AsciiBuilder'.
+printMIMEType ∷ MIMEType → AsciiBuilder
+{-# INLINEABLE printMIMEType #-}
+printMIMEType (MIMEType {..})
+    = A.toAsciiBuilder (A.fromCIAscii mtMedia) ⊕
+      A.toAsciiBuilder "/" ⊕
+      A.toAsciiBuilder (A.fromCIAscii mtSub) ⊕
+      printMIMEParams mtParams
+
+-- |Parse 'MIMEType' from an 'Ascii'. This function throws an
+-- exception for parse error. For literals consider using
+-- 'Network.HTTP.Lucu.MIMEType.TH.mimeType'.
+parseMIMEType ∷ Ascii → MIMEType
+{-# INLINEABLE parseMIMEType #-}
+parseMIMEType str
+    = case parseOnly (finishOff mimeType) $ A.toByteString str of
+        Right  t → t
+        Left err → error ("unparsable MIME Type: " ⧺ A.toString str ⧺ ": " ⧺ err)
+
+-- |'Parser' for an 'MIMEType'.
+mimeType ∷ Parser MIMEType
+{-# INLINEABLE mimeType #-}
+mimeType = do media  ← A.toCIAscii <$> token
+              _      ← char '/'
+              sub    ← A.toCIAscii <$> token
+              params ← mimeParams
+              return $ MIMEType media sub params
+
+-- |'Parser' for a list of 'MIMEType's.
+mimeTypeList ∷ Parser [MIMEType]
+{-# INLINE mimeTypeList #-}
+mimeTypeList = listOf mimeType