X-Git-Url: http://git.cielonegro.org/gitweb.cgi?p=Lucu.git;a=blobdiff_plain;f=Network%2FHTTP%2FLucu%2FDefaultPage.hs;h=1ae5abd9589bd2f697f849b5f1189ecc6e0c3bcf;hp=8c30315e1d316a98f40642302453c7a4fbb07121;hb=3318fe0;hpb=a9e9f50818285bf66cd64e5a248175eecb8e1fea

diff --git a/Network/HTTP/Lucu/DefaultPage.hs b/Network/HTTP/Lucu/DefaultPage.hs
index 8c30315..1ae5abd 100644
--- a/Network/HTTP/Lucu/DefaultPage.hs
+++ b/Network/HTTP/Lucu/DefaultPage.hs
@@ -1,88 +1,143 @@
+{-# LANGUAGE
+    OverloadedStrings
+  , RecordWildCards
+  , TypeOperators
+  , UnicodeSyntax
+  #-}
 module Network.HTTP.Lucu.DefaultPage
-    ( getDefaultPage   -- Maybe Request -> Response -> String
-    , writeDefaultPage -- Interaction -> STM ()
+    ( getDefaultPage
+    , defaultPageContentType
+    , mkDefaultPage
     )
     where
+import Blaze.ByteString.Builder (Builder)
+import qualified Blaze.ByteString.Builder.Char.Utf8 as BB
+import Control.Arrow
+import Control.Arrow.ArrowList
+import Control.Arrow.ListArrow
+import Control.Arrow.Unicode
+import Data.Ascii (Ascii)
+import qualified Data.Ascii as A
+import Data.Maybe
+import qualified Data.Text as T
+import Network.HTTP.Lucu.Config
+import Network.HTTP.Lucu.Headers
+import Network.HTTP.Lucu.Request
+import Network.HTTP.Lucu.Response
+import Network.URI hiding (path)
+import Prelude.Unicode
+import Text.XML.HXT.Arrow.WriteDocument
+import Text.XML.HXT.Arrow.XmlArrow
+import Text.XML.HXT.Arrow.XmlState
+import Text.XML.HXT.DOM.TypeDefs
 
-import           Control.Arrow
-import           Control.Arrow.ArrowList
-import           Control.Concurrent.STM
-import           Control.Monad
-import qualified Data.ByteString.Lazy.Char8 as B
-import           Data.ByteString.Lazy.Char8 (ByteString)
-import           Data.Maybe
-import           Network.HTTP.Lucu.Headers
-import           Network.HTTP.Lucu.Interaction
-import           Network.HTTP.Lucu.Request
-import           Network.HTTP.Lucu.Response
-import           System.IO.Unsafe
-import           Text.Printf
-import           Text.XML.HXT.Arrow.WriteDocument
-import           Text.XML.HXT.Arrow.XmlArrow
-import           Text.XML.HXT.Arrow.XmlIOStateArrow
-import           Text.XML.HXT.DOM.TypeDefs
-import           Text.XML.HXT.DOM.XmlKeywords
-
-
-getDefaultPage :: Maybe Request -> Response -> String
-getDefaultPage req res
-    = let msgA = getMsg req res
+getDefaultPage ∷ Config → Maybe Request → Response → Builder
+{-# INLINEABLE getDefaultPage #-}
+getDefaultPage conf req res
+    = let msgA     = getMsg req res
+          [xmlStr] = runLA ( mkDefaultPage conf (resStatus res) msgA
+                             ⋙ 
+                             writeDocumentToString [ withIndent True ]
+                           ) ()
       in
-        unsafePerformIO $
-        do [xmlStr] <- runX ( mkDefaultPage (resStatus res) msgA
-                              >>>
-                              writeDocumentToString [ (a_indent, v_1) ]
-                            )
-           return xmlStr
-
-
-writeDefaultPage :: Interaction -> STM ()
-writeDefaultPage itr
-    = do wroteHeader <- readTVar (itrWroteHeader itr)
-
-         -- ヘッダが出力濟だったら意味が無い。
-         when wroteHeader
-                  $ fail "writeDefaultPage: the header has already been written"
-
-         resM <- readTVar (itrResponse itr)
-
-         -- Response が不明ならばページ書込も不可
-         when (resM == Nothing)
-                  $ fail "writeDefaultPage: response was Nothing"
-
-         let reqM = itrRequest itr
-             res  = fromJust resM
-             page = B.pack $ getDefaultPage reqM res
-
-         writeTVar (itrResponse itr)
-                       $ Just $ setHeader "Content-Type" "application/xhtml+xml" res
+        BB.fromString xmlStr
 
-         writeTVar (itrBodyToSend itr)
-                       $ page
+defaultPageContentType ∷ Ascii
+{-# INLINE defaultPageContentType #-}
+defaultPageContentType = "application/xhtml+xml"
 
-
-mkDefaultPage :: (ArrowXml a) => StatusCode -> a b String -> a b XmlTree
-mkDefaultPage status msgA
-    = let (sCode, sMsg) = statusCode status
+mkDefaultPage ∷ (ArrowXml (⇝), StatusCode sc)
+              ⇒ Config
+              → sc
+              → b ⇝ XmlTree
+              → b ⇝ XmlTree
+{-# INLINEABLE mkDefaultPage #-}
+mkDefaultPage conf status msgA
+    = let sStr = A.toString $ A.fromAsciiBuilder $ printStatusCode status
+          sig  = concat [ A.toString (cnfServerSoftware conf)
+                        , " at "
+                        , T.unpack (cnfServerHost conf)
+                        ]
       in ( eelem "/"
            += ( eelem "html"
                 += sattr "xmlns" "http://www.w3.org/1999/xhtml"
                 += ( eelem "head"
                      += ( eelem "title"
-                          += txt (printf "%03d %s" sCode sMsg)
+                          += txt sStr
                         ))
                 += ( eelem "body"
                      += ( eelem "h1"
-                          += txt sMsg
+                          += txt sStr
                         )
-                     += ( msgA
-                          >>>
-                          eelem "p" += ( this
-                                         >>>
-                                         mkText
-                                       )))))
+                     += ( eelem "p" += msgA )
+                     += eelem "hr"
+                     += ( eelem "address" += txt sig ))))
+
+getMsg ∷ (ArrowXml (⇝)) ⇒ Maybe Request → Response → b ⇝ XmlTree
+{-# INLINEABLE getMsg #-}
+getMsg req res@(Response {..})
+    -- 1xx responses don't have a body.
+    -- 2xx responses don't need a body to be completed.
+    -- 3xx:
+    | resStatus ≈ MovedPermanently
+        = txt ("The resource at " ⧺ path ⧺ " has been moved to ")
+          <+>
+          eelem "a" += sattr "href" loc
+                    += txt loc
+          <+>
+          txt " permanently."
+
+    | resStatus ≈ Found
+        = txt ("The resource at " ⧺ path ⧺ " is currently located at ")
+          <+>
+          eelem "a" += sattr "href" loc
+                    += txt loc
+          <+>
+          txt ". This is not a permanent relocation."
+
+    | resStatus ≈ SeeOther
+        = txt ("The resource at " ⧺ path ⧺ " can be found at ")
+          <+>
+          eelem "a" += sattr "href" loc
+                    += txt loc
+          <+>
+          txt "."
 
+    | resStatus ≈ TemporaryRedirect
+        = txt ("The resource at " ⧺ path ⧺ " is temporarily located at ")
+          <+>
+          eelem "a" += sattr "href" loc
+                    += txt loc
+          <+>
+          txt "."
+
+      -- 4xx:
+    | resStatus ≈ BadRequest
+        = txt "The server could not understand the request you sent."
+    | resStatus ≈ Unauthorized
+        = txt ("You need a valid authentication to access " ⧺ path)
+    | resStatus ≈ Forbidden
+        = txt ("You don't have permission to access " ⧺ path)
+    | resStatus ≈ NotFound
+        = txt ("The requested URL " ⧺ path ⧺ " was not found on this server.")
+    | resStatus ≈ Gone
+        = txt ("The resource at " ⧺ path ⧺ " was here in past times, but has gone permanently.")
+    | resStatus ≈ RequestEntityTooLarge
+        = txt ("The request entity you sent for " ⧺ path ⧺ " was too large to accept.")
+    | resStatus ≈ RequestURITooLarge
+        = txt "The request URI you sent was too large to accept."
+
+      -- 5xx:
+    | resStatus ≈ InternalServerError
+        = txt ("An internal server error has occured during the process of your request to " ⧺ path)
+    | resStatus ≈ ServiceUnavailable
+        = txt "The service is temporarily unavailable. Try later."
+
+    | otherwise
+        = none
+    where
+      path ∷ String
+      path = uriPath $ reqURI $ fromJust req
 
-getMsg :: (ArrowList a) => Maybe Request -> Response -> a b String
-getMsg req res
-    = constA "FIXME: NOT IMPL"
+      loc ∷ String
+      loc = A.toString $ fromJust $ getHeader "Location" res