Exodus to GHC 6.8.1

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

diff --git a/Network/HTTP/Lucu/Postprocess.hs b/Network/HTTP/Lucu/Postprocess.hs
index 6e8a5e6753b5bafdf6bbebc2448b76730e07afd3..d3659cc78905f89082d70824b5e0f621ab316fb9 100644 (file)
--- a/Network/HTTP/Lucu/Postprocess.hs
+++ b/Network/HTTP/Lucu/Postprocess.hs
@@ -6,10 +6,11 @@ module Network.HTTP.Lucu.Postprocess
 
 import           Control.Concurrent.STM
 import           Control.Monad
-import           Data.ByteString.Base (ByteString)
-import qualified Data.ByteString.Char8 as C8
+import qualified Data.ByteString as Strict (ByteString)
+import qualified Data.ByteString.Char8 as C8 hiding (ByteString)
 import           Data.IORef
 import           Data.Maybe
+import           Data.Time
 import           GHC.Conc (unsafeIOToSTM)
 import           Network.HTTP.Lucu.Abortion
 import           Network.HTTP.Lucu.Config
@@ -19,7 +20,6 @@ import           Network.HTTP.Lucu.Interaction
 import           Network.HTTP.Lucu.RFC1123DateTime
 import           Network.HTTP.Lucu.Request
 import           Network.HTTP.Lucu.Response
-import           System.Time
 import           System.IO.Unsafe
 
 {-
@@ -75,8 +75,7 @@ postprocess itr
                   $ abortSTM InternalServerError []
                         $ Just ("The status code was " ++ show sc ++ " but no Location header.")
 
-         when (reqM /= Nothing)
-              $ relyOnRequest itr
+         when (reqM /= Nothing) relyOnRequest
 
          -- itrResponse の内容は relyOnRequest によって變へられてゐる可
          -- 能性が高い。
@@ -85,10 +84,9 @@ postprocess itr
                       $ completeUnconditionalHeaders (itrConfig itr) oldRes
             writeItr itr itrResponse newRes
     where
-      relyOnRequest :: Interaction -> STM ()
-      relyOnRequest itr
-          = itr `seq`
-            do status <- readItr itr itrResponse resStatus
+      relyOnRequest :: STM ()
+      relyOnRequest
+          = do status <- readItr itr itrResponse resStatus
                req    <- readItr itr itrRequest fromJust
 
                let reqVer      = reqVersion req
@@ -100,25 +98,25 @@ postprocess itr
                                           status == ResetContent ||
                                           status == NotModified    )
 
-               updateRes itr $! deleteHeader (C8.pack "Content-Length")
-               updateRes itr $! deleteHeader (C8.pack "Transfer-Encoding")
+               updateRes $! deleteHeader (C8.pack "Content-Length")
+               updateRes $! deleteHeader (C8.pack "Transfer-Encoding")
 
-               cType <- readHeader itr (C8.pack "Content-Type")
+               cType <- readHeader (C8.pack "Content-Type")
                when (cType == Nothing)
-                        $ updateRes itr $ setHeader (C8.pack "Content-Type") defaultPageContentType
+                        $ updateRes $ setHeader (C8.pack "Content-Type") defaultPageContentType
 
                if canHaveBody then
                    when (reqVer == HttpVersion 1 1)
-                            $ do updateRes itr $! setHeader (C8.pack "Transfer-Encoding") (C8.pack "chunked")
+                            $ do updateRes $! setHeader (C8.pack "Transfer-Encoding") (C8.pack "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 itr $! deleteHeader (C8.pack "Content-Type")
-                                 updateRes itr $! deleteHeader (C8.pack "Etag")
-                                 updateRes itr $! deleteHeader (C8.pack "Last-Modified")
+                            $ do updateRes $! deleteHeader (C8.pack "Content-Type")
+                                 updateRes $! deleteHeader (C8.pack "Etag")
+                                 updateRes $! deleteHeader (C8.pack "Last-Modified")
 
-               conn <- readHeader itr (C8.pack "Connection")
+               conn <- readHeader (C8.pack "Connection")
                case conn of
                  Nothing    -> return ()
                  Just value -> if value `noCaseEq` C8.pack "close" then
@@ -128,19 +126,19 @@ postprocess itr
 
                willClose <- readItr itr itrWillClose id
                when willClose
-                        $ updateRes itr $! setHeader (C8.pack "Connection") (C8.pack "close")
+                        $ updateRes $! setHeader (C8.pack "Connection") (C8.pack "close")
 
                when (reqMethod req == HEAD || not canHaveBody)
                         $ writeTVar (itrWillDiscardBody itr) True
 
-      readHeader :: Interaction -> ByteString -> STM (Maybe ByteString)
-      readHeader itr name
-          = itr `seq` name `seq`
+      readHeader :: Strict.ByteString -> STM (Maybe Strict.ByteString)
+      readHeader name
+          = name `seq`
             readItr itr itrResponse $ getHeader name
 
-      updateRes :: Interaction -> (Response -> Response) -> STM ()
-      updateRes itr updator 
-          = itr `seq` updator `seq`
+      updateRes :: (Response -> Response) -> STM ()
+      updateRes updator 
+          = updator `seq`
             updateItr itr itrResponse updator
 
 
@@ -149,30 +147,37 @@ completeUnconditionalHeaders conf res
     = conf `seq` res `seq`
       return res >>= compServer >>= compDate >>= return
       where
-        compServer res
-            = case getHeader (C8.pack "Server") res of
-                Nothing -> return $ setHeader (C8.pack "Server") (cnfServerSoftware conf) res
-                Just _  -> return res
+        compServer res'
+            = case getHeader (C8.pack "Server") res' of
+                Nothing -> return $ setHeader (C8.pack "Server") (cnfServerSoftware conf) res'
+                Just _  -> return res'
 
-        compDate res
-            = case getHeader (C8.pack "Date") res of
+        compDate res'
+            = case getHeader (C8.pack "Date") res' of
                 Nothing -> do date <- getCurrentDate
-                              return $ setHeader (C8.pack "Date") date res
-                Just _  -> return res
+                              return $ setHeader (C8.pack "Date") date res'
+                Just _  -> return res'
 
 
-cache :: IORef (ClockTime, ByteString)
+cache :: IORef (UTCTime, Strict.ByteString)
 cache = unsafePerformIO $
-        newIORef (TOD 0 0, undefined)
+        newIORef (UTCTime (ModifiedJulianDay 0) 0, undefined)
 {-# NOINLINE cache #-}
 
-getCurrentDate :: IO ByteString
-getCurrentDate = do now@(TOD curSec _)           <- getClockTime
-                    (TOD cachedSec _, cachedStr) <- readIORef cache
+getCurrentDate :: IO Strict.ByteString
+getCurrentDate = do now                     <- getCurrentTime
+                    (cachedTime, cachedStr) <- readIORef cache
 
-                    if curSec == cachedSec then
+                    if now `mostlyEq` cachedTime then
                         return cachedStr
                       else
                         do let dateStr = C8.pack $ formatHTTPDateTime now
                            writeIORef cache (now, dateStr)
-                           return dateStr
\ No newline at end of file
+                           return dateStr
+    where
+      mostlyEq :: UTCTime -> UTCTime -> Bool
+      mostlyEq a b
+          = if utctDay a == utctDay b then
+                fromEnum (utctDayTime a) == fromEnum (utctDayTime b)
+            else
+                False