X-Git-Url: http://git.cielonegro.org/gitweb.cgi?a=blobdiff_plain;f=Network%2FHTTP%2FLucu%2FAbortion.hs;h=26ea8b01e9bc4c6f5da8735e2af12046493dd324;hb=70bf5bd248aa426ca4e410b3fb9a0529354aedaf;hp=fd4903dc8c0a78acfe7342cb7c63c42799092d88;hpb=8e78bc83bfe67a376293c346ae0b30f1a684c787;p=Lucu.git

diff --git a/Network/HTTP/Lucu/Abortion.hs b/Network/HTTP/Lucu/Abortion.hs
index fd4903d..26ea8b0 100644
--- a/Network/HTTP/Lucu/Abortion.hs
+++ b/Network/HTTP/Lucu/Abortion.hs
@@ -1,10 +1,15 @@
--- #prune
+{-# LANGUAGE
+    DeriveDataTypeable
+  , UnicodeSyntax
+  #-}
+{-# OPTIONS_HADDOCK prune #-}
 
--- | Aborting the computation of 'Network.HTTP.Lucu.Resource.Resource'
--- in any IO monads or arrows.
+-- |Aborting the computation of 'Network.HTTP.Lucu.Resource.Resource'
+-- in any 'Prelude.IO' monads or arrows.
 module Network.HTTP.Lucu.Abortion
     ( Abortion(..)
     , abort
+    , abortPurely
     , abortSTM
     , abortA
     , abortPage
@@ -16,19 +21,18 @@ import           Control.Arrow.ArrowIO
 import           Control.Concurrent.STM
 import           Control.Exception
 import           Control.Monad.Trans
+import qualified Data.ByteString.Char8 as C8
+import           Data.Typeable
 import           GHC.Conc (unsafeIOToSTM)
-import           Data.Dynamic
 import           Network.HTTP.Lucu.Config
 import           Network.HTTP.Lucu.DefaultPage
 import           Network.HTTP.Lucu.Headers
 import           Network.HTTP.Lucu.Request
 import           Network.HTTP.Lucu.Response
-import {-# SOURCE #-} Network.HTTP.Lucu.Resource
 import           System.IO.Unsafe
 import           Text.XML.HXT.Arrow.WriteDocument
 import           Text.XML.HXT.Arrow.XmlArrow
-import           Text.XML.HXT.Arrow.XmlIOStateArrow
-import           Text.XML.HXT.DOM.XmlKeywords
+import           Text.XML.HXT.Arrow.XmlState
 
 
 data Abortion = Abortion {
@@ -37,12 +41,15 @@ data Abortion = Abortion {
     , aboMessage :: !(Maybe String)
     } deriving (Show, Typeable)
 
--- | Computation of @'abort' status headers msg@ aborts the
+instance Exception Abortion
+
+-- |Computation of @'abort' status headers msg@ aborts the
 -- 'Network.HTTP.Lucu.Resource.Resource' monad with given status,
 -- additional response headers, and optional message string.
 --
--- What this really does is to just throw a special DynException. The
--- exception will be caught by the system.
+-- What this really does is to throw a special
+-- 'Control.Exception.Exception'. The exception will be caught by the
+-- Lucu system.
 --
 -- 1. If the 'Network.HTTP.Lucu.Resource.Resource' is in the /Deciding
 --    Header/ or any precedent states, it is possible to use the
@@ -63,25 +70,29 @@ data Abortion = Abortion {
 abort :: MonadIO m => StatusCode -> [ (String, String) ] -> Maybe String -> m a
 abort status headers msg
     = status `seq` headers `seq` msg `seq`
-      let abo = Abortion status headers msg
-          exc = DynException (toDyn abo)
+      let abo = Abortion status (toHeaders $ map pack headers) msg
       in
-        liftIO $ throwIO exc
-{-# SPECIALIZE abort :: StatusCode -> [ (String, String) ] -> Maybe String -> Resource a #-}
+        liftIO $ throwIO abo
+    where
+      pack (x, y) = (C8.pack x, C8.pack y)
+
+-- |This is similar to 'abort' but computes it with
+-- 'System.IO.Unsafe.unsafePerformIO'.
+abortPurely :: StatusCode -> [ (String, String) ] -> Maybe String -> a
+abortPurely = ((unsafePerformIO .) .) . abort
 
--- | Computation of @'abortSTM' status headers msg@ just computes
--- 'abort' in a STM monad.
+-- |Computation of @'abortSTM' status headers msg@ just computes
+-- 'abort' in a 'Control.Monad.STM.STM' monad.
 abortSTM :: StatusCode -> [ (String, String) ] -> Maybe String -> STM a
 abortSTM status headers msg
     = status `seq` headers `seq` msg `seq`
       unsafeIOToSTM $! abort status headers msg
 
 -- | Computation of @'abortA' -< (status, (headers, msg))@ just
--- computes 'abort' in an ArrowIO.
+-- computes 'abort' in an 'Control.Arrow.ArrowIO.ArrowIO'.
 abortA :: ArrowIO a => a (StatusCode, ([ (String, String) ], Maybe String)) c
 abortA 
     = arrIO3 abort
-{-# SPECIALIZE abortA :: IOSArrow (StatusCode, ([ (String, String) ], Maybe String)) c #-}
 
 -- aboMessage が Just なら單に mkDefaultPage に渡すだけで良いので樂だが、
 -- Nothing の場合は getDefaultPage を使ってデフォルトのメッセージを得な
@@ -94,14 +105,13 @@ abortPage conf reqM res abo
             -> let [html] = unsafePerformIO 
                             $ runX ( mkDefaultPage conf (aboStatus abo) (txt msg)
                                      >>>
-                                     writeDocumentToString [(a_indent, v_1)]
+                                     writeDocumentToString [ withIndent True ]
                                    )
                in
                  html
         Nothing
             -> let res'  = res { resStatus = aboStatus abo }
                    res'' = foldl (.) id [setHeader name value
-                                             | (name, value) <- aboHeaders abo]
-                           $ res'
+                                             | (name, value) <- fromHeaders $ aboHeaders abo] res'
                in
                  getDefaultPage conf reqM res''