+-- #hide
module Network.HTTP.Lucu.Postprocess
- ( postprocess -- Interaction -> STM ()
- , completeUnconditionalHeaders -- Response -> IO Response
+ ( postprocess
+ , completeUnconditionalHeaders
)
where
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
{-
- * 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。
+
+ * ステータスが 2xx, 3xx, 4xx, 5xx のいずれでもなければ 500 にする。
+
+ * 405 Method Not Allowed なのに Allow ヘッダが無ければ 500 にする。
+
+ * 304 Not Modified 以外の 3xx なのに Location ヘッダが無ければ 500 に
+ する。
* Content-Length があれば、それを削除する。
* 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。
- * 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。
+ * 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。
-}
-{- 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
+ 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 (sc /= NotModified && isRedirection sc && getHeader "Location" res == Nothing)
+ $ abortSTM InternalServerError []
+ $ Just ("The status code was " ++ show sc ++ " but no Location header.")
when (itrRequest itr /= Nothing)
$ relyOnRequest itr
- do oldRes <- readItr itr itrResponse id
- newRes <- unsafeIOToSTM $ completeUnconditionalHeaders $ fromJust oldRes
- writeItr itr itrResponse $ Just newRes
+ do newRes <- unsafeIOToSTM
+ $ completeUnconditionalHeaders (itrConfig itr) res
+ writeItr itr itrResponse newRes
where
+ relyOnRequest :: Interaction -> STM ()
relyOnRequest itr
- = do status <- readItr itr itrResponse (resStatus . fromJust)
+ = do status <- readItr itr itrResponse resStatus
let req = fromJust $ itrRequest itr
reqVer = reqVersion req
updateRes itr $ deleteHeader "Content-Length"
+ 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
| x <- splitBy (== ',') (map toLower te)]
in
when (teList == [] || last teList /= "chunked")
- $ setStatus itr InternalServerError
+ $ abortSTM InternalServerError []
+ $ Just ("Transfer-Encoding must end with `chunked' "
+ ++ "because this is an HTTP/1.1 request: "
+ ++ te)
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"
+ Just te -> abortSTM InternalServerError []
+ $ Just ("Transfer-Encoding must be `identity' because "
+ ++ "this is an HTTP/1.0 request: "
+ ++ te)
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"
+ $ 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
+ = readItr itr itrResponse $ getHeader name
updateRes :: Interaction -> (Response -> Response) -> STM ()
updateRes itr updator
- = updateItrF itr itrResponse updator
+ = updateItr itr itrResponse updator
-completeUnconditionalHeaders :: Response -> IO Response
-completeUnconditionalHeaders res
+completeUnconditionalHeaders :: Config -> Response -> IO Response
+completeUnconditionalHeaders conf res
= 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
projects / Lucu.git / blobdiff