module Yesod.Helpers.Static
(
Static (..)
, StaticRoute (..)
, fileLookupDir
, staticFiles
#if TEST
, testSuite
#endif
) where
import System.Directory
import Control.Monad
import Data.Maybe (fromMaybe)
import Yesod
import Data.List (intercalate)
import Language.Haskell.TH.Syntax
#if TEST
import Test.Framework (testGroup, Test)
import Test.Framework.Providers.HUnit
import Test.HUnit hiding (Test)
#endif
data Static = Static
{ staticLookup :: FilePath -> IO (Maybe (Either FilePath Content))
, staticTypes :: [(String, ContentType)]
}
mkYesodSub "Static" [] [$parseRoutes|
*Strings StaticRoute GET
|]
fileLookupDir :: FilePath -> [(String, ContentType)] -> Static
fileLookupDir dir = Static $ \fp -> do
let fp' = dir ++ '/' : fp
exists <- doesFileExist fp'
if exists
then return $ Just $ Left fp'
else return Nothing
getStaticRoute :: [String]
-> GHandler Static master (ContentType, Content)
getStaticRoute fp' = do
Static fl ctypes <- getYesodSub
when (any isUnsafe fp') notFound
let fp = intercalate "/" fp'
content <- liftIO $ fl fp
case content of
Nothing -> notFound
Just (Left fp'') -> do
let ctype = fromMaybe typeOctet $ lookup (ext fp'') ctypes
sendFile ctype fp''
Just (Right bs) -> do
let ctype = fromMaybe typeOctet $ lookup (ext fp) ctypes
return (ctype, bs)
where
isUnsafe [] = True
isUnsafe ('.':_) = True
isUnsafe _ = False
notHidden :: FilePath -> Bool
notHidden ('.':_) = False
notHidden _ = True
getFileList :: FilePath -> IO [[String]]
getFileList = flip go id
where
go :: String -> ([String] -> [String]) -> IO [[String]]
go fp front = do
allContents <- filter notHidden `fmap` getDirectoryContents fp
let fullPath :: String -> String
fullPath f = fp ++ '/' : f
files <- filterM (doesFileExist . fullPath) allContents
let files' = map (front . return) files
dirs <- filterM (doesDirectoryExist . fullPath) allContents
dirs' <- mapM (\f -> go (fullPath f) (front . (:) f)) dirs
return $ concat $ files' : dirs'
staticFiles :: FilePath -> Q [Dec]
staticFiles fp = do
fs <- qRunIO $ getFileList fp
concat `fmap` mapM go fs
where
replace' '.' = '_'
replace' '-' = '_'
replace' c = c
go f = do
let name = mkName $ intercalate "_" $ map (map replace') f
f' <- lift f
let sr = ConE $ mkName "StaticRoute"
return
[ SigD name $ ConT ''Route `AppT` ConT ''Static
, FunD name
[ Clause [] (NormalB $ sr `AppE` f') []
]
]
#if TEST
testSuite :: Test
testSuite = testGroup "Yesod.Helpers.Static"
[ testCase "get file list" caseGetFileList
]
caseGetFileList :: Assertion
caseGetFileList = do
x <- getFileList "test"
x @?= [["foo"], ["bar", "baz"]]
#endif