Skip to content
Find file
Fetching contributors…
Cannot retrieve contributors at this time
103 lines (87 sloc) 3.74 KB
-- -----------------------------------------------------------------------------
-- Copyright 2002, Simon Marlow.
-- Copyright 2006, Bjorn Bringert.
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are
-- met:
--
-- * Redistributions of source code must retain the above copyright notice,
-- this list of conditions and the following disclaimer.
--
-- * Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
--
-- * Neither the name of the copyright holder(s) nor the names of
-- contributors may be used to endorse or promote products derived from
-- this software without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-- -----------------------------------------------------------------------------
module Turbinado.Environment.MimeTypes (
setMimeTypes,
mimeTypeOf,
addMimeTypesToEnvironment
) where
import Data.List
import Data.Map (Map)
import Data.Typeable
import qualified Data.Map as Map hiding (Map)
import Text.ParserCombinators.Parsec
import Control.Monad.State
import Control.Monad.Trans
import Turbinado.Environment.Types
setMimeTypes :: (HasEnvironment m) => MimeTypes -> m ()
setMimeTypes mi = do e <- getEnvironment
setEnvironment $ e {getMimeTypes = Just mi}
addMimeTypesToEnvironment :: (HasEnvironment m) => FilePath -> m ()
addMimeTypesToEnvironment mime_types_file =
do stuff <- liftIO $ readFile mime_types_file
setMimeTypes (MimeTypes $ Map.fromList (parseMimeTypes stuff))
mimeTypeOf :: MimeTypes -> FilePath -> Maybe MimeType
mimeTypeOf (MimeTypes mime_types) filename =
do let ext = extension filename
if null ext
then Nothing
else Map.lookup ext mime_types
extension :: String -> String
extension fn = go (reverse fn) ""
where go [] _ = ""
go ('.':_) ext = ext
go (x:s) ext = go s (x:ext)
parseMimeTypes :: String -> [(String,MimeType)]
parseMimeTypes file =
[ (ext,val)
| Just (val,exts) <- map (parseMimeLine . takeWhile (/= '#')) (lines file)
, ext <- exts
]
parseMimeLine :: String -> Maybe (MimeType, [String])
parseMimeLine l = case parse pMimeLine "MIME line" l of
Left _ -> Nothing
Right m -> Just m
pMimeLine :: Parser (MimeType, [String])
pMimeLine = do t <- pMimeType
es <- (spaces >> sepBy pToken spaces)
return (t, es)
pMimeType :: Parser MimeType
pMimeType = do part1 <- pToken
char '/'
part2 <- pToken
return $ MimeType part1 part2
especials, tokenchar :: [Char]
especials = "()<>@,;:\\\"/[]?.="
tokenchar = "!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~" \\ especials
pToken :: Parser String
pToken = many1 (oneOf tokenchar)
Something went wrong with that request. Please try again.