X-Git-Url: http://git.cielonegro.org/gitweb.cgi?a=blobdiff_plain;f=Network%2FHTTP%2FLucu%2FPostprocess.hs;h=062a3bf6203c303195684999a4198cb510338700;hb=d05d8c883eaca12ee621975a2b95c5ebdc2357d2;hp=929413cd0ce86a19ce389067f98a8e61265aaa0b;hpb=a9e9f50818285bf66cd64e5a248175eecb8e1fea;p=Lucu.git

diff --git a/Network/HTTP/Lucu/Postprocess.hs b/Network/HTTP/Lucu/Postprocess.hs
index 929413c..062a3bf 100644
--- a/Network/HTTP/Lucu/Postprocess.hs
+++ b/Network/HTTP/Lucu/Postprocess.hs
@@ -1,6 +1,6 @@
 module Network.HTTP.Lucu.Postprocess
-    ( postprocess -- Interaction -> STM ()
-    , completeUnconditionalHeaders -- Response -> IO Response
+    ( postprocess
+    , completeUnconditionalHeaders
     )
     where
 
@@ -9,31 +9,36 @@ import           Control.Monad
 import           Data.Char
 import           Data.Maybe
 import           GHC.Conc (unsafeIOToSTM)
+import           Network.HTTP.Lucu.Abortion
+import           Network.HTTP.Lucu.Config
 import           Network.HTTP.Lucu.Headers
 import           Network.HTTP.Lucu.HttpVersion
 import           Network.HTTP.Lucu.Interaction
 import           Network.HTTP.Lucu.RFC1123DateTime
 import           Network.HTTP.Lucu.Request
 import           Network.HTTP.Lucu.Response
-import           Network.HTTP.Lucu.Utils
 import           System.Time
 
 {-
   
-  * Response が未設定なら、HTTP/1.1 500 Internal Server Error にする。
+  * Response が未設定なら、200 OK にする。
 
-  * Content-Length があれば、それを削除する。
+  * ステータスが 2xx, 3xx, 4xx, 5xx のいずれでもなければ 500 にする。
 
-  * HTTP/1.1 であり、且つ body を持つ事が出來る時、Transfer-Encoding の
-    最後の要素が chunked でなければ 500 Internal Error にする。
-    Transfer-Encoding が未設定であれば、chunked に設定する。
+  * 405 Method Not Allowed なのに Allow ヘッダが無ければ 500 にする。
 
-  * HTTP/1.0 なのに Transfer-Encoding が設定濟なら 500 Internal Server
-    Error にする。但し identity だけは許す。
+  * 304 Not Modified 以外の 3xx なのに Location ヘッダが無ければ 500 に
+    する。
 
-  * body を持つ事が出來る時、Content-Type が無ければ
-    application/octet-stream にする。出來ない時、HEAD でなければ
-    Content-Type を削除する。
+  * Content-Length があれば、それを削除する。Transfer-Encoding があって
+    も削除する。
+
+  * HTTP/1.1 であり、body を持つ事が出來る時、Transfer-Encoding を
+    chunked に設定する。
+
+  * body を持つ事が出來る時、Content-Type が無ければデフォルト値にする。
+    出來ない時、HEAD でなければContent-Type, Etag, Last-Modified を削除
+    する。
 
   * body を持つ事が出來ない時、body 破棄フラグを立てる。
 
@@ -47,27 +52,43 @@ import           System.Time
 
 -}
 
-{- Postprocess は body を補完した後で實行する事 -}
-
 postprocess :: Interaction -> STM ()
 postprocess itr
-    = do res <- readItr itr itrResponse id
+    = itr `seq`
+      do reqM <- readItr itr itrRequest id
+         res  <- readItr itr itrResponse id
+         let sc = resStatus res
+
+         when (not $ any (\ p -> p sc) [isSuccessful, isRedirection, isError])
+                  $ abortSTM InternalServerError []
+                        $ Just ("The status code is not good for a final status: "
+                                ++ show sc)
 
-         when (res == Nothing)
-              $ setStatus itr InternalServerError
+         when (sc == MethodNotAllowed && getHeader "Allow" res == Nothing)
+                  $ abortSTM InternalServerError []
+                        $ Just ("The status was " ++ show sc ++ " but no Allow header.")
 
-         when (itrRequest itr /= Nothing)
+         when (sc /= NotModified && isRedirection sc && getHeader "Location" res == Nothing)
+                  $ abortSTM InternalServerError []
+                        $ Just ("The status code was " ++ show sc ++ " but no Location header.")
+
+         when (reqM /= Nothing)
               $ relyOnRequest itr
 
+         -- 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 $ fromJust oldRes
-            writeItr itr itrResponse $ Just newRes
+            newRes <- unsafeIOToSTM
+                      $ completeUnconditionalHeaders (itrConfig itr) oldRes
+            writeItr itr itrResponse newRes
     where
+      relyOnRequest :: Interaction -> STM ()
       relyOnRequest itr
-          = do status <- readItr itr itrResponse (resStatus . fromJust)
+          = itr `seq`
+            do status <- readItr itr itrResponse resStatus
+               req    <- readItr itr itrRequest fromJust
 
-               let req         = fromJust $ itrRequest itr
-                   reqVer      = reqVersion req
+               let reqVer      = reqVersion req
                    canHaveBody = if reqMethod req == HEAD then
                                      False
                                  else
@@ -76,71 +97,55 @@ postprocess itr
                                           status == ResetContent ||
                                           status == NotModified    )
 
-               updateRes itr $ deleteHeader "Content-Length"
+               updateRes itr $! deleteHeader "Content-Length"
+               updateRes itr $! deleteHeader "Transfer-Encoding"
+
+               cType <- readHeader itr "Content-Type"
+               when (cType == Nothing)
+                        $ updateRes itr $ setHeader "Content-Type" defaultPageContentType
 
                if canHaveBody then
-                   do teM <- readHeader itr "Transfer-Encoding"
-                      if reqVer == HttpVersion 1 1 then
-
-                          do case teM of
-                               Nothing -> updateRes itr $ setHeader "Transfer-Encoding" "chunked"
-                               Just te -> let teList = [trim isWhiteSpace x
-                                                            | x <- splitBy (== ',') (map toLower te)]
-                                          in
-                                            when (teList == [] || last teList /= "chunked")
-                                                     $ setStatus itr InternalServerError
-
-                             writeItr itr itrWillChunkBody True
-                        else
-                          case fmap (map toLower) teM of
-                            Nothing         -> return ()
-                            Just "identity" -> return ()
-                            _               -> setStatus itr InternalServerError
-
-                      cType <- readHeader itr "Content-Type"
-                      when (cType == Nothing)
-                               $ updateRes itr $ setHeader "Content-Type" "application/octet-stream"
+                   when (reqVer == HttpVersion 1 1)
+                            $ do updateRes itr $! 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
-                   do updateRes itr $ deleteHeader "Transfer-Encoding"
-                      when (reqMethod req /= HEAD)
-                               $ updateRes itr $ deleteHeader "Content-Type"
+                   when (reqMethod req /= HEAD)
+                            $ do updateRes itr $! deleteHeader "Content-Type"
+                                 updateRes itr $! deleteHeader "Etag"
+                                 updateRes itr $! deleteHeader "Last-Modified"
 
                conn <- readHeader itr "Connection"
                case fmap (map toLower) conn of
                  Just "close" -> writeItr itr itrWillClose True
-                 _            -> updateRes itr $ setHeader "Connection" "close"
+                 _            -> return ()
+
+               willClose <- readItr itr itrWillClose id
+               when willClose
+                        $ updateRes itr $! setHeader "Connection" "close"
 
                when (reqMethod req == HEAD || not canHaveBody)
                         $ writeTVar (itrWillDiscardBody itr) True
 
-      setStatus :: Interaction -> StatusCode -> STM ()
-      setStatus itr status
-          = writeTVar (itrResponse itr) (Just $ Response {
-                                                    resVersion = HttpVersion 1 1
-                                                  , resStatus  = status
-                                                  , resHeaders = []
-                                                  })
-
       readHeader :: Interaction -> String -> STM (Maybe String)
       readHeader itr name
-          = do valueMM <- readItrF itr itrResponse $ getHeader name
-               case valueMM of
-                 Just (Just val) -> return $ Just val
-                 _               -> return Nothing
+          = itr `seq` name `seq`
+            readItr itr itrResponse $ getHeader name
 
       updateRes :: Interaction -> (Response -> Response) -> STM ()
       updateRes itr updator 
-          = updateItrF itr itrResponse updator
+          = itr `seq` updator `seq`
+            updateItr itr itrResponse updator
 
 
-completeUnconditionalHeaders :: Response -> IO Response
-completeUnconditionalHeaders res
-    = return res >>= compServer >>= compDate >>= return
+completeUnconditionalHeaders :: Config -> Response -> IO Response
+completeUnconditionalHeaders conf res
+    = conf `seq` res `seq`
+      return res >>= compServer >>= compDate >>= return
       where
         compServer res
             = case getHeader "Server" res of
-                Nothing -> return $ addHeader "Server" "Lucu/1.0" res
+                Nothing -> return $ addHeader "Server" (cnfServerSoftware conf) res
                 Just _  -> return res
 
         compDate res