{-# LANGUAGE
BangPatterns
+ , OverloadedStrings
, UnicodeSyntax
#-}
module Network.HTTP.Lucu.Postprocess
, completeUnconditionalHeaders
)
where
-
+import Control.Applicative
import Control.Concurrent.STM
import Control.Monad
+import Control.Monad.Unicode
+import Data.Ascii (Ascii, CIAscii)
+import qualified Data.Ascii as A
import qualified Data.ByteString as Strict (ByteString)
import qualified Data.ByteString.Char8 as C8 hiding (ByteString)
import Data.IORef
import Network.HTTP.Lucu.Interaction
import Network.HTTP.Lucu.Request
import Network.HTTP.Lucu.Response
+import Prelude.Unicode
import System.IO.Unsafe
{-
-}
-postprocess :: Interaction -> STM ()
+postprocess ∷ Interaction → STM ()
postprocess !itr
- = do reqM <- readItr itr itrRequest id
- res <- readItr itr itrResponse id
+ = do reqM ← readItr itr itrRequest id
+ res ← readItr itr itrResponse id
let sc = resStatus res
- unless (any (\ p -> p sc) [isSuccessful, isRedirection, isError])
+ unless (any (\ p → p sc) [isSuccessful, isRedirection, isError])
$ abortSTM InternalServerError []
$ Just ("The status code is not good for a final status: "
++ show sc)
- when (sc == MethodNotAllowed && getHeader (C8.pack "Allow") res == Nothing)
+ when (sc ≡ MethodNotAllowed ∧ getHeader (C8.pack "Allow") res ≡ Nothing)
$ abortSTM InternalServerError []
$ Just ("The status was " ++ show sc ++ " but no Allow header.")
- when (sc /= NotModified && isRedirection sc && getHeader (C8.pack "Location") res == Nothing)
+ when (sc /= NotModified ∧ isRedirection sc ∧ getHeader (C8.pack "Location") res ≡ Nothing)
$ abortSTM InternalServerError []
$ Just ("The status code was " ++ show sc ++ " but no Location header.")
-- itrResponse の内容は relyOnRequest によって變へられてゐる可
-- 能性が高い。
- do oldRes <- readItr itr itrResponse id
- newRes <- unsafeIOToSTM
- $ completeUnconditionalHeaders (itrConfig itr) oldRes
+ do oldRes ← readItr itr itrResponse id
+ newRes ← unsafeIOToSTM
+ $ completeUnconditionalHeaders (itrConfig itr) oldRes
writeItr itr itrResponse newRes
where
- relyOnRequest :: STM ()
+ relyOnRequest ∷ STM ()
relyOnRequest
- = do status <- readItr itr itrResponse resStatus
- req <- readItr itr itrRequest fromJust
+ = do status ← readItr itr itrResponse resStatus
+ req ← readItr itr itrRequest fromJust
let reqVer = reqVersion req
- canHaveBody = if reqMethod req == HEAD then
+ canHaveBody = if reqMethod req ≡ HEAD then
False
else
- not (isInformational status ||
- status == NoContent ||
- status == ResetContent ||
- status == NotModified )
+ not (isInformational status ∨
+ status ≡ NoContent ∨
+ status ≡ ResetContent ∨
+ status ≡ NotModified )
- updateRes $! deleteHeader (C8.pack "Content-Length")
- updateRes $! deleteHeader (C8.pack "Transfer-Encoding")
+ updateRes $ deleteHeader "Content-Length"
+ updateRes $ deleteHeader "Transfer-Encoding"
- cType <- readHeader (C8.pack "Content-Type")
- when (cType == Nothing)
- $ updateRes $ setHeader (C8.pack "Content-Type") defaultPageContentType
+ cType ← readHeader "Content-Type"
+ when (cType ≡ Nothing)
+ $ updateRes $ setHeader "Content-Type" defaultPageContentType
if canHaveBody then
- when (reqVer == HttpVersion 1 1)
- $ do updateRes $! setHeader (C8.pack "Transfer-Encoding") (C8.pack "chunked")
+ when (reqVer ≡ HttpVersion 1 1)
+ $ do updateRes $ setHeader "Transfer-Encoding" "chunked"
writeItr itr itrWillChunkBody True
else
-- body 関連のヘッダを削除。但し HEAD なら Content-* は殘す
when (reqMethod req /= HEAD)
- $ do updateRes $! deleteHeader (C8.pack "Content-Type")
- updateRes $! deleteHeader (C8.pack "Etag")
- updateRes $! deleteHeader (C8.pack "Last-Modified")
+ $ do updateRes $ deleteHeader "Content-Type"
+ updateRes $ deleteHeader "Etag"
+ updateRes $ deleteHeader "Last-Modified"
- conn <- readHeader (C8.pack "Connection")
+ conn ← readHeader "Connection"
case conn of
- Nothing -> return ()
- Just value -> when (value `noCaseEq` C8.pack "close")
+ Nothing → return ()
+ Just value → when (A.toCIAscii value ≡ "close")
$ writeItr itr itrWillClose True
- willClose <- readItr itr itrWillClose id
+ willClose ← readItr itr itrWillClose id
when willClose
- $ updateRes $! setHeader (C8.pack "Connection") (C8.pack "close")
+ $ updateRes $ setHeader "Connection" "close"
- when (reqMethod req == HEAD || not canHaveBody)
+ when (reqMethod req ≡ HEAD ∨ not canHaveBody)
$ writeTVar (itrWillDiscardBody itr) True
- readHeader :: Strict.ByteString -> STM (Maybe Strict.ByteString)
- readHeader !name
- = readItr itr itrResponse $ getHeader name
-
- updateRes :: (Response -> Response) -> STM ()
- updateRes !updator
- = updateItr itr itrResponse updator
+ readHeader ∷ CIAscii → STM (Maybe Ascii)
+ readHeader = readItr itr itrResponse ∘ getHeader
+ updateRes ∷ (Response → Response) → STM ()
+ updateRes = updateItr itr itrResponse
-completeUnconditionalHeaders :: Config -> Response -> IO Response
-completeUnconditionalHeaders !conf !res
- = compServer res >>= compDate
+completeUnconditionalHeaders ∷ Config → Response → IO Response
+completeUnconditionalHeaders conf = (compDate =≪) ∘ compServer
where
compServer res'
- = case getHeader (C8.pack "Server") res' of
- Nothing -> return $ setHeader (C8.pack "Server") (cnfServerSoftware conf) res'
- Just _ -> return res'
+ = case getHeader "Server" res' of
+ Nothing → return $ setHeader "Server" (cnfServerSoftware conf) res'
+ Just _ → return res'
compDate res'
- = case getHeader (C8.pack "Date") res' of
- Nothing -> do date <- getCurrentDate
- return $ setHeader (C8.pack "Date") date res'
- Just _ -> return res'
-
-
-cache :: IORef (UTCTime, Strict.ByteString)
-cache = unsafePerformIO $
- newIORef (UTCTime (ModifiedJulianDay 0) 0, undefined)
-{-# NOINLINE cache #-}
-
-getCurrentDate :: IO Strict.ByteString
-getCurrentDate = do now <- getCurrentTime
- (cachedTime, cachedStr) <- readIORef cache
-
- if now `mostlyEq` cachedTime then
- return cachedStr
- else
- do let dateStr = C8.pack $ HTTP.format now
- writeIORef cache (now, dateStr)
- return dateStr
- where
- mostlyEq :: UTCTime -> UTCTime -> Bool
- mostlyEq a b
- = (utctDay a == utctDay b)
- &&
- (fromEnum (utctDayTime a) == fromEnum (utctDayTime b))
+ = case getHeader "Date" res' of
+ Nothing → do date ← getCurrentDate
+ return $ setHeader "Date" date res'
+ Just _ → return res'
+
+getCurrentDate ∷ IO Ascii
+getCurrentDate = HTTP.format <$> getCurrentTime
projects / Lucu.git / blobdiff