X-Git-Url: http://git.cielonegro.org/gitweb.cgi?p=Lucu.git;a=blobdiff_plain;f=Network%2FHTTP%2FLucu%2FHeaders.hs;h=2ee9cbb8ce60e39311b496aa2b8ebfe7666e9cbc;hp=c97c93cb652156c618d92bab8977fa2627fda117;hb=19763f7de78daf2d4c794f4010039f70c7f73994;hpb=15aa04a569fb13fb0793389f78f52b0255083cef

diff --git a/Network/HTTP/Lucu/Headers.hs b/Network/HTTP/Lucu/Headers.hs
index c97c93c..2ee9cbb 100644
--- a/Network/HTTP/Lucu/Headers.hs
+++ b/Network/HTTP/Lucu/Headers.hs
@@ -1,140 +1,154 @@
+{-# LANGUAGE
+    FlexibleInstances
+  , GeneralizedNewtypeDeriving
+  , MultiParamTypeClasses
+  , TypeSynonymInstances
+  , OverloadedStrings
+  , UnicodeSyntax
+  #-}
+-- |An internal module for HTTP headers.
 module Network.HTTP.Lucu.Headers
     ( Headers
     , HasHeaders(..)
 
-    , noCaseCmp
-    , noCaseEq
-
-    , emptyHeaders
-    , toHeaders
-    , fromHeaders
-
-    , headersP
-    , hPutHeaders
+    , headers
+    , printHeaders
     )
     where
-
-import           Data.ByteString.Base (ByteString, toForeignPtr, w2c, inlinePerformIO)
-import qualified Data.ByteString.Char8 as C8
-import           Data.Char
-import           Data.List
-import           Data.Map (Map)
+import Control.Applicative hiding (empty)
+import Control.Applicative.Unicode hiding ((∅))
+import Control.Arrow
+import Control.Monad
+import Data.Ascii (Ascii, AsciiBuilder, CIAscii)
+import qualified Data.Ascii as A
+import Data.Attoparsec.Char8 as P
+import Data.List (intersperse)
 import qualified Data.Map as M
-import           Data.Word
-import           Foreign.ForeignPtr
-import           Foreign.Ptr
-import           Foreign.Storable
-import           Network.HTTP.Lucu.Parser
-import           Network.HTTP.Lucu.Parser.Http
-import           Network.HTTP.Lucu.Utils
-import           System.IO
-
-type Headers = Map NCBS ByteString
-newtype NCBS = NCBS ByteString
-
-toNCBS :: ByteString -> NCBS
-toNCBS = NCBS
-{-# INLINE toNCBS #-}
-
-fromNCBS :: NCBS -> ByteString
-fromNCBS (NCBS x) = x
-{-# INLINE fromNCBS #-}
-
-instance Eq NCBS where
-    (NCBS a) == (NCBS b) = a == b
-
-instance Ord NCBS where
-    (NCBS a) `compare` (NCBS b) = a `noCaseCmp` b
-
-instance Show NCBS where
-    show (NCBS x) = show x
-
-noCaseCmp :: ByteString -> ByteString -> Ordering
-noCaseCmp a b = toForeignPtr a `cmp` toForeignPtr b
-    where
-      cmp :: (ForeignPtr Word8, Int, Int) -> (ForeignPtr Word8, Int, Int) -> Ordering
-      cmp (x1, s1, l1) (x2, s2, l2)
-          | l1 == 0  && l2 == 0               = EQ
-          | x1 == x2 && s1 == s2 && l1 == l2  = EQ
-          | otherwise
-              = inlinePerformIO $
-                withForeignPtr x1 $ \ p1 ->
-                withForeignPtr x2 $ \ p2 ->
-                noCaseCmp' (p1 `plusPtr` s1) l1 (p2 `plusPtr` s2) l2
-{-# INLINE noCaseCmp #-}
-
--- もし先頭の文字列が等しければ、短い方が小さい。
-noCaseCmp' :: Ptr Word8 -> Int -> Ptr Word8 -> Int -> IO Ordering
-noCaseCmp' p1 l1 p2 l2
-    | l1 == 0 && l2 == 0 = return EQ
-    | l1 == 0 && l1 /= 0 = return LT
-    | l1 /= 0 && l2 == 0 = return GT
-    | otherwise
-        = do c1 <- peek p1
-             c2 <- peek p2
-             case toLower (w2c c1) `compare` toLower (w2c c2) of
-               EQ -> noCaseCmp' (p1 `plusPtr` 1) (l1 - 1) (p2 `plusPtr` 1) (l2 - 1)
-               x  -> return x
-
-
-noCaseEq :: ByteString -> ByteString -> Bool
-noCaseEq a b = toForeignPtr a `cmp` toForeignPtr b
-    where
-      cmp :: (ForeignPtr Word8, Int, Int) -> (ForeignPtr Word8, Int, Int) -> Bool
-      cmp (x1, s1, l1) (x2, s2, l2)
-          | l1 /= l2                          = False
-          | l1 == 0  && l2 == 0               = True
-          | x1 == x2 && s1 == s2 && l1 == l2  = True
-          | otherwise
-              = inlinePerformIO $
-                withForeignPtr x1 $ \ p1 ->
-                withForeignPtr x2 $ \ p2 ->
-                noCaseEq' (p1 `plusPtr` s1) (p2 `plusPtr` s2) l1
-
-
-noCaseEq' :: Ptr Word8 -> Ptr Word8 -> Int -> IO Bool
-noCaseEq' p1 p2 l
-    | l == 0    = return True
-    | otherwise
-        = do c1 <- peek p1
-             c2 <- peek p2
-             if toLower (w2c c1) == toLower (w2c c2) then
-                 noCaseEq' (p1 `plusPtr` 1) (p2 `plusPtr` 1) (l - 1)
-               else
-                 return False
-
+import Data.Collections
+import Data.Collections.BaseInstances ()
+import Data.Monoid
+import Data.Monoid.Unicode
+import Network.HTTP.Lucu.Parser.Http
+import Prelude hiding (filter, foldr, lookup, null)
+import Prelude.Unicode
+
+newtype Headers
+    = Headers (M.Map CIAscii Ascii)
+      deriving (Eq, Show)
 
 class HasHeaders a where
-    getHeaders :: a -> Headers
-    setHeaders :: a -> Headers -> a
-
-    getHeader :: ByteString -> a -> Maybe ByteString
-    getHeader key a
-        = key `seq` a `seq`
-          M.lookup (toNCBS key) (getHeaders a)
-
-    deleteHeader :: ByteString -> a -> a
-    deleteHeader key a
-        = key `seq` a `seq`
-          setHeaders a $ M.delete (toNCBS key) (getHeaders a)
-
-    setHeader :: ByteString -> ByteString -> a -> a
-    setHeader key val a
-        = key `seq` val `seq` a `seq`
-          setHeaders a $ M.insert (toNCBS key) val (getHeaders a)
-
-
-emptyHeaders :: Headers
-emptyHeaders = M.empty
-
-
-toHeaders :: [(ByteString, ByteString)] -> Headers
-toHeaders xs = M.fromList [(toNCBS a, b) | (a, b) <- xs]
-
-
-fromHeaders :: Headers -> [(ByteString, ByteString)]
-fromHeaders hs = [(fromNCBS a, b) | (a, b) <- M.toList hs]
-
+    getHeaders ∷ a → Headers
+    setHeaders ∷ a → Headers → a
+
+    modifyHeaders ∷ (Headers → Headers) → a → a
+    {-# INLINE modifyHeaders #-}
+    modifyHeaders = (setHeaders ⊛) ∘ (∘ getHeaders)
+
+    getHeader ∷ CIAscii → a → Maybe Ascii
+    {-# INLINE getHeader #-}
+    getHeader = (∘ getHeaders) ∘ lookup
+
+    hasHeader ∷ CIAscii → a → Bool
+    {-# INLINE hasHeader #-}
+    hasHeader = (∘ getHeaders) ∘ member
+
+    getCIHeader ∷ CIAscii → a → Maybe CIAscii
+    {-# INLINE getCIHeader #-}
+    getCIHeader = ((A.toCIAscii <$>) ∘) ∘ getHeader
+
+    deleteHeader ∷ CIAscii → a → a
+    {-# INLINE deleteHeader #-}
+    deleteHeader = modifyHeaders ∘ delete
+
+    setHeader ∷ CIAscii → Ascii → a → a
+    {-# INLINE setHeader #-}
+    setHeader = (modifyHeaders ∘) ∘ insertWith const
+
+instance HasHeaders Headers where
+    getHeaders   = id
+    setHeaders _ = id
+
+-- |@'insert' (key, val)@ merges @val@ with an existing one if any.
+instance Unfoldable Headers (CIAscii, Ascii) where
+    {-# INLINE insert #-}
+    insert (key, val) (Headers m)
+        = Headers $ insertWith merge key val m
+    {-# INLINE empty #-}
+    empty
+        = Headers empty
+    {-# INLINE singleton #-}
+    singleton v
+        = Headers $ singleton v
+    {-# INLINE insertMany #-}
+    insertMany f (Headers m)
+        = Headers $ insertMany f m
+    {-# INLINE insertManySorted #-}
+    insertManySorted f (Headers m)
+        = Headers $ insertManySorted f m
+
+instance Foldable Headers (CIAscii, Ascii) where
+    {-# INLINE foldr #-}
+    foldr f b (Headers m) = foldr f b m
+
+instance Collection Headers (CIAscii, Ascii) where
+    {-# INLINE filter #-}
+    filter f (Headers m) = Headers $ filter f m
+
+instance Indexed Headers CIAscii Ascii where
+    {-# INLINE index #-}
+    index k (Headers m) = index k m
+    {-# INLINE adjust #-}
+    adjust f k (Headers m) = Headers $ adjust f k m
+    {-# INLINE inDomain #-}
+    inDomain k (Headers m) = inDomain k m
+
+instance Monoid Headers where
+    {-# INLINE mempty #-}
+    mempty = empty
+    {-# INLINE mappend #-}
+    mappend (Headers α) (Headers β)
+        = Headers $ insertManySorted β α
+
+instance Map Headers CIAscii Ascii where
+    {-# INLINE lookup #-}
+    lookup k (Headers m) = lookup k m
+    {-# INLINE insertWith #-}
+    insertWith f k v (Headers m)
+        = Headers $ insertWith f k v m
+    {-# INLINE mapWithKey #-}
+    mapWithKey f (Headers m)
+        = Headers $ mapWithKey f m
+    {-# INLINE unionWith #-}
+    unionWith f (Headers α) (Headers β)
+        = Headers $ unionWith f α β
+    {-# INLINE intersectionWith #-}
+    intersectionWith f (Headers α) (Headers β)
+        = Headers $ intersectionWith f α β
+    {-# INLINE differenceWith #-}
+    differenceWith f (Headers α) (Headers β)
+        = Headers $ differenceWith f α β
+    {-# INLINE isSubmapBy #-}
+    isSubmapBy f (Headers α) (Headers β)
+        = isSubmapBy f α β
+    {-# INLINE isProperSubmapBy #-}
+    isProperSubmapBy f (Headers α) (Headers β)
+        = isProperSubmapBy f α β
+
+instance SortingCollection Headers (CIAscii, Ascii) where
+    {-# INLINE minView #-}
+    minView (Headers m) = second Headers <$> minView m
+
+merge ∷ Ascii → Ascii → Ascii
+{-# INLINE merge #-}
+merge a b
+    | nullA a ∧ nullA b = (∅)
+    | nullA a           = b
+    |           nullA b = a
+    | otherwise         = a ⊕ ", " ⊕ b
+    where
+      nullA ∷ Ascii → Bool
+      {-# INLINE nullA #-}
+      nullA = null ∘ A.toByteString
 
 {-
   message-header = field-name ":" [ field-value ]
@@ -147,49 +161,42 @@ fromHeaders hs = [(fromNCBS a, b) | (a, b) <- M.toList hs]
   field-value の先頭および末尾にある LWS は全て削除され、それ以外の
   LWS は單一の SP に變換される。
 -}
-headersP :: Parser Headers
-headersP = do xs <- many header
-              crlf
-              return (M.fromList xs)
+headers ∷ Parser Headers
+{-# INLINEABLE headers #-}
+headers = do xs ← P.many header
+             crlf
+             return $ fromFoldable xs
     where
-      header :: Parser (NCBS, ByteString)
-      header = do name <- token
-                  char ':'
-                  -- FIXME: これは多少インチキだが、RFC 2616 のこの部分
-                  -- の記述はひどく曖昧であり、この動作が本當に間違って
-                  -- ゐるのかどうかも良く分からない。例へば
-                  -- quoted-string の内部にある空白は纏めていいのか惡い
-                  -- のか？直勸的には駄目さうに思へるが、そんな記述は見
-                  -- 付からない。
-                  contents <- many (lws <|> many1 text)
+      header ∷ Parser (CIAscii, Ascii)
+      header = do name ← A.toCIAscii <$> token
+                  void $ char ':'
+                  skipMany lws
+                  values ← content `sepBy` try lws
+                  skipMany (try lws)
                   crlf
-                  let value = foldr (++) "" contents
-                      norm  = normalize value
-                  return (toNCBS $ C8.pack name, C8.pack norm)
-
-      normalize :: String -> String
-      normalize = trimBody . trim isWhiteSpace
-
-      trimBody = foldr (++) []
-                 . map (\ s -> if head s == ' ' then
-                                   " "
-                               else
-                                   s)
-                 . group
-                 . map (\ c -> if isWhiteSpace c
-                               then ' '
-                               else c)
-
-
-hPutHeaders :: Handle -> Headers -> IO ()
-hPutHeaders h hds
-    = h `seq` hds `seq`
-      mapM_ putH (M.toList hds) >> hPutStr h "\r\n"
+                  return (name, joinValues values)
+
+      content ∷ Parser Ascii
+      {-# INLINE content #-}
+      content = A.unsafeFromByteString
+                <$>
+                takeWhile1 (\c → isText c ∧ c ≢ '\x20')
+
+      joinValues ∷ [Ascii] → Ascii
+      {-# INLINE joinValues #-}
+      joinValues = A.fromAsciiBuilder
+                   ∘ mconcat
+                   ∘ intersperse (A.toAsciiBuilder "\x20")
+                   ∘ map A.toAsciiBuilder
+
+printHeaders ∷ Headers → AsciiBuilder
+printHeaders (Headers m)
+    = mconcat (map printHeader (fromFoldable m)) ⊕
+      A.toAsciiBuilder "\x0D\x0A"
     where
-      putH :: (NCBS, ByteString) -> IO ()
-      putH (name, value)
-          = name `seq` value `seq`
-            do C8.hPutStr h (fromNCBS name)
-               C8.hPutStr h (C8.pack ": ")
-               C8.hPutStr h value
-               C8.hPutStr h (C8.pack "\r\n")
+      printHeader ∷ (CIAscii, Ascii) → AsciiBuilder
+      printHeader (name, value)
+          = A.toAsciiBuilder (A.fromCIAscii name) ⊕
+            A.toAsciiBuilder ": "                 ⊕
+            A.toAsciiBuilder value                ⊕
+            A.toAsciiBuilder "\x0D\x0A"