--- |MIME Type guesser which guesses by a file extension. This is a
--- poor man's way of guessing MIME Types. It is simple and fast.
+{-# LANGUAGE
+ UnboxedTuples
+ , UnicodeSyntax
+ #-}
+-- |MIME Type guessing by a file extension. This is a poor man's way
+-- of guessing MIME Types. It is simple and fast.
--
-- In general you don't have to use this module directly.
module Network.HTTP.Lucu.MIMEType.Guess
where
import qualified Data.ByteString.Lazy.Char8 as B
-import Data.ByteString.Lazy.Char8 (ByteString)
import qualified Data.Map as M
import Data.Map (Map)
import Data.Maybe
import Network.HTTP.Lucu.Parser
import Network.HTTP.Lucu.Parser.Http
import Network.HTTP.Lucu.Utils
-import System.IO
--- |Map from extension to MIME Type.
+-- |'Data.Map.Map' from extension to MIME Type.
type ExtMap = Map String MIMEType
-- |Guess the MIME Type of file.
= fpath `seq`
do file <- B.readFile fpath
case parse (allowEOF extMapP) file of
- (Success xs, _) -> return $ compile xs
- (_, input') -> let near = B.unpack $ B.take 100 input'
- in
- fail ("Failed to parse: " ++ fpath ++ " (near: " ++ near ++ ")")
+ (# Success xs, _ #)
+ -> return $ compile xs
+
+ (# _, input' #)
+ -> let near = B.unpack $ B.take 100 input'
+ in
+ fail ("Failed to parse: " ++ fpath ++ " (near: " ++ near ++ ")")
extMapP :: Parser [ (MIMEType, [String]) ]
where
spc = oneOf " \t"
- comment = do many spc
- char '#'
- many $ satisfy (/= '\n')
- return Nothing
+ comment = many spc >>
+ char '#' >>
+ ( many $ satisfy (/= '\n') ) >>
+ return Nothing
- validLine = do many spc
+ validLine = do _ <- many spc
mime <- mimeTypeP
- many spc
+ _ <- many spc
exts <- sepBy token (many spc)
return $ Just (mime, exts)
= let hsModule = HsModule undefined modName (Just exports) imports decls
modName = Module moduleName
exports = [HsEVar (UnQual (HsIdent variableName))]
- imports = [ HsImportDecl undefined (Module "Network.HTTP.Lucu.MIMEType") False Nothing Nothing
+ imports = [ HsImportDecl undefined (Module "Network.HTTP.Lucu.MIMEType") False Nothing (Just (False, []))
, HsImportDecl undefined (Module "Network.HTTP.Lucu.MIMEType.Guess") False Nothing Nothing
, HsImportDecl undefined (Module "Data.Map") True (Just (Module "M")) Nothing
- , HsImportDecl undefined (Module "Data.Map") False Nothing (Just (False, [HsIAbs (HsIdent "Map")]))
]
decls = [ HsTypeSig undefined [HsIdent variableName]
(HsQualType []
[] (HsUnGuardedRhs extMapExp) []]
]
extMapExp = HsApp (HsVar (Qual (Module "M") (HsIdent "fromList"))) (HsList records)
- comment = "{- !!! WARNING !!!\n"
- ++ " This file is automatically generated.\n"
- ++ " DO NOT EDIT BY HAND OR YOU WILL REGRET -}\n\n"
+ comment = "{- !!! WARNING !!!\n"
+ ++ " This file is automatically generated.\n"
+ ++ " DO NOT EDIT BY HAND OR YOU WILL REGRET -}\n\n"
in
comment ++ prettyPrint hsModule ++ "\n"
where
= HsTuple [HsLit (HsString ext), mimeToExp mime]
mimeToExp :: MIMEType -> HsExp
- mimeToExp (MIMEType maj min params)
- = foldl appendParam (HsInfixApp
- (HsLit (HsString maj))
- (HsQVarOp (UnQual (HsSymbol "</>")))
- (HsLit (HsString min))) params
-
- appendParam :: HsExp -> (String, String) -> HsExp
- appendParam x param
- = HsInfixApp x (HsQVarOp (UnQual (HsSymbol "<:>"))) $ paramToExp param
-
- paramToExp :: (String, String) -> HsExp
- paramToExp (name, value)
- = HsInfixApp
- (HsLit (HsString name))
- (HsQVarOp (UnQual (HsSymbol "<=>")))
- (HsLit (HsString value))
\ No newline at end of file
+ mimeToExp mt
+ = HsApp (HsVar (UnQual (HsIdent "read"))) (HsLit (HsString $ show mt))