X-Git-Url: http://git.cielonegro.org/gitweb.cgi?p=Lucu.git;a=blobdiff_plain;f=Network%2FHTTP%2FLucu%2FHeaders.hs;h=d4c51d5e24ae7681e91aff273ae9c5bbc29b2e70;hp=ccd514087b2d7a340360c76fdf6dab034cc0d2da;hb=97295ba;hpb=1000bdc46cfe7b3ae550ff24ccea9f440f11b42a

diff --git a/Network/HTTP/Lucu/Headers.hs b/Network/HTTP/Lucu/Headers.hs
index ccd5140..d4c51d5 100644
--- a/Network/HTTP/Lucu/Headers.hs
+++ b/Network/HTTP/Lucu/Headers.hs
@@ -1,48 +1,130 @@
+{-# LANGUAGE
+    FlexibleInstances
+  , GeneralizedNewtypeDeriving
+  , MultiParamTypeClasses
+  , TemplateHaskell
+  , TypeSynonymInstances
+  , OverloadedStrings
+  , UnicodeSyntax
+  #-}
+{-# OPTIONS_GHC -fno-warn-missing-methods #-}
+-- |An internal module for HTTP headers.
 module Network.HTTP.Lucu.Headers
     ( Headers
     , HasHeaders(..)
-    , emptyHeaders -- Headers
-    , headersP     -- Parser Headers
-    , hPutHeaders  -- Handle -> Headers -> IO ()
+    , headers
     )
     where
+import Control.Applicative hiding (empty)
+import Control.Applicative.Unicode hiding ((∅))
+import Control.Monad
+import Data.Ascii (Ascii, AsciiBuilder, CIAscii)
+import qualified Data.Ascii as A
+import Data.Attoparsec.Char8
+import qualified Data.Collections.Newtype.TH as C
+import Data.Convertible.Base
+import Data.Convertible.Instances.Ascii ()
+import Data.Convertible.Utils
+import Data.List (intersperse)
+import qualified Data.Map as M (Map)
+import Data.Collections
+import Data.Collections.BaseInstances ()
+import Data.Monoid
+import Data.Monoid.Unicode
+import Network.HTTP.Lucu.Parser.Http
+import Prelude hiding (lookup, null)
+import Prelude.Unicode
 
-import           Data.Char
-import           Data.List
-import           Network.HTTP.Lucu.Parser
-import           Network.HTTP.Lucu.Parser.Http
-import           Network.HTTP.Lucu.Utils
-import           System.IO
-
-type Headers = [ (String, String) ]
+newtype Headers
+    = Headers (M.Map CIAscii Ascii)
+      deriving (Eq, Show)
 
 class HasHeaders a where
-    getHeaders :: a -> Headers
-    setHeaders :: a -> Headers -> a
+    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
 
-    getHeader :: String -> a -> Maybe String
-    getHeader key a
-        = fmap snd $ find (noCaseEq key . fst) (getHeaders a)
+    getCIHeader ∷ CIAscii → a → Maybe CIAscii
+    {-# INLINE getCIHeader #-}
+    getCIHeader = ((A.toCIAscii <$>) ∘) ∘ getHeader
 
-    deleteHeader :: String -> a -> a
-    deleteHeader key a
-        = setHeaders a $ filter (not . noCaseEq key . fst) (getHeaders a)
+    deleteHeader ∷ CIAscii → a → a
+    {-# INLINE deleteHeader #-}
+    deleteHeader = modifyHeaders ∘ delete
 
-    addHeader :: String -> String -> a -> a
-    addHeader key val a
-        = setHeaders a $ (getHeaders a) ++ [(key, val)]
+    setHeader ∷ CIAscii → Ascii → a → a
+    {-# INLINE setHeader #-}
+    setHeader = (modifyHeaders ∘) ∘ insertWith const
 
-    setHeader :: String -> String -> a -> a
-    setHeader key val a
-        = let list    = getHeaders a
-              deleted = filter (not . noCaseEq key . fst) list
-              added   = deleted ++ [(key, val)]
-          in 
-            setHeaders a added
+instance HasHeaders Headers where
+    getHeaders   = id
+    setHeaders _ = id
 
-emptyHeaders :: Headers
-emptyHeaders = []
+C.derive [d| instance Foldable   Headers (CIAscii, Ascii)
+             instance Collection Headers (CIAscii, Ascii)
+             instance Indexed    Headers  CIAscii  Ascii
+             instance Map        Headers  CIAscii  Ascii
+             instance SortingCollection Headers (CIAscii, Ascii)
+           |]
 
+-- |@'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 = Headers ∘ singleton
+
+instance Monoid Headers where
+    {-# INLINE mempty #-}
+    mempty  = empty
+    {-# INLINE mappend #-}
+    mappend = insertMany
+
+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
+
+instance ConvertSuccess Headers Ascii where
+    {-# INLINE convertSuccess #-}
+    convertSuccess = convertSuccessVia ((⊥) ∷ AsciiBuilder)
+
+instance ConvertSuccess Headers AsciiBuilder where
+    {-# INLINE convertSuccess #-}
+    convertSuccess (Headers m)
+        = mconcat (header <$> fromFoldable m) ⊕ cs ("\x0D\x0A" ∷ Ascii)
+        where
+          header ∷ (CIAscii, Ascii) → AsciiBuilder
+          header (name, value)
+              = cs name                 ⊕
+                cs (": " ∷ Ascii)       ⊕
+                cs value                ⊕
+                cs ("\x0D\x0A" ∷ Ascii)
+
+deriveAttempts [ ([t| Headers |], [t| Ascii        |])
+               , ([t| Headers |], [t| AsciiBuilder |])
+               ]
 
 {-
   message-header = field-name ":" [ field-value ]
@@ -55,43 +137,30 @@ emptyHeaders = []
   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 xs
+headers ∷ Parser Headers
+{-# INLINEABLE headers #-}
+headers = do xs ← many header
+             crlf
+             return $ fromFoldable xs
     where
-      header :: Parser (String, String)
-      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
-                  return (name, normalize value)
+                  return (name, joinValues values)
 
-      normalize :: String -> String
-      normalize = trimBody . trim isWhiteSpace
+      content ∷ Parser Ascii
+      {-# INLINE content #-}
+      content = A.unsafeFromByteString
+                <$>
+                takeWhile1 (\c → isText c ∧ c ≢ '\x20')
 
-      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 = mapM_ putH hds >> hPutStr h "\r\n"
-    where
-      putH (name, value) = do hPutStr h name
-                              hPutStr h ": "
-                              hPutStr h value
-                              hPutStr h "\r\n"
+      joinValues ∷ [Ascii] → Ascii
+      {-# INLINE joinValues #-}
+      joinValues = A.fromAsciiBuilder
+                   ∘ mconcat
+                   ∘ intersperse (A.toAsciiBuilder "\x20")
+                   ∘ (A.toAsciiBuilder <$>)