1 module Network.HTTP.Lucu.Headers
17 import qualified Data.ByteString as Strict (ByteString)
18 import Data.ByteString.Internal (toForeignPtr, w2c, inlinePerformIO)
19 import qualified Data.ByteString.Char8 as C8 hiding (ByteString)
23 import qualified Data.Map as M
26 import Foreign.ForeignPtr
28 import Foreign.Storable
29 import Network.HTTP.Lucu.HandleLike
30 import Network.HTTP.Lucu.Parser
31 import Network.HTTP.Lucu.Parser.Http
32 import Network.HTTP.Lucu.Utils
34 type Headers = Map NCBS Strict.ByteString
35 newtype NCBS = NCBS Strict.ByteString
37 toNCBS :: Strict.ByteString -> NCBS
41 fromNCBS :: NCBS -> Strict.ByteString
43 {-# INLINE fromNCBS #-}
45 instance Eq NCBS where
46 (NCBS a) == (NCBS b) = a == b
48 instance Ord NCBS where
49 (NCBS a) `compare` (NCBS b) = a `noCaseCmp` b
51 instance Show NCBS where
52 show (NCBS x) = show x
54 noCaseCmp :: Strict.ByteString -> Strict.ByteString -> Ordering
55 noCaseCmp a b = a `seq` b `seq`
56 toForeignPtr a `cmp` toForeignPtr b
58 cmp :: (ForeignPtr Word8, Int, Int) -> (ForeignPtr Word8, Int, Int) -> Ordering
59 cmp (x1, s1, l1) (x2, s2, l2)
60 | x1 `seq` s1 `seq` l1 `seq` x2 `seq` s2 `seq` l2 `seq` False = undefined
61 | l1 == 0 && l2 == 0 = EQ
62 | x1 == x2 && s1 == s2 && l1 == l2 = EQ
65 withForeignPtr x1 $ \ p1 ->
66 withForeignPtr x2 $ \ p2 ->
67 noCaseCmp' (p1 `plusPtr` s1) l1 (p2 `plusPtr` s2) l2
70 -- もし先頭の文字列が等しければ、短い方が小さい。
71 noCaseCmp' :: Ptr Word8 -> Int -> Ptr Word8 -> Int -> IO Ordering
72 noCaseCmp' p1 l1 p2 l2
73 | p1 `seq` l1 `seq` p2 `seq` l2 `seq` False = undefined
74 | l1 == 0 && l2 == 0 = return EQ
80 case comparing (toLower . w2c) c1 c2 of
81 EQ -> noCaseCmp' (p1 `plusPtr` 1) (l1 - 1) (p2 `plusPtr` 1) (l2 - 1)
85 noCaseEq :: Strict.ByteString -> Strict.ByteString -> Bool
86 noCaseEq a b = a `seq` b `seq`
87 toForeignPtr a `cmp` toForeignPtr b
89 cmp :: (ForeignPtr Word8, Int, Int) -> (ForeignPtr Word8, Int, Int) -> Bool
90 cmp (x1, s1, l1) (x2, s2, l2)
91 | x1 `seq` s1 `seq` l1 `seq` x2 `seq` s2 `seq` l2 `seq` False = undefined
93 | l1 == 0 && l2 == 0 = True
94 | x1 == x2 && s1 == s2 && l1 == l2 = True
97 withForeignPtr x1 $ \ p1 ->
98 withForeignPtr x2 $ \ p2 ->
99 noCaseEq' (p1 `plusPtr` s1) (p2 `plusPtr` s2) l1
102 noCaseEq' :: Ptr Word8 -> Ptr Word8 -> Int -> IO Bool
104 | p1 `seq` p2 `seq` l `seq` False = undefined
105 | l == 0 = return True
109 if toLower (w2c c1) == toLower (w2c c2) then
110 noCaseEq' (p1 `plusPtr` 1) (p2 `plusPtr` 1) (l - 1)
115 class HasHeaders a where
116 getHeaders :: a -> Headers
117 setHeaders :: a -> Headers -> a
119 getHeader :: Strict.ByteString -> a -> Maybe Strict.ByteString
122 M.lookup (toNCBS key) (getHeaders a)
124 deleteHeader :: Strict.ByteString -> a -> a
127 setHeaders a $ M.delete (toNCBS key) (getHeaders a)
129 setHeader :: Strict.ByteString -> Strict.ByteString -> a -> a
131 = key `seq` val `seq` a `seq`
132 setHeaders a $ M.insert (toNCBS key) val (getHeaders a)
135 emptyHeaders :: Headers
136 emptyHeaders = M.empty
139 toHeaders :: [(Strict.ByteString, Strict.ByteString)] -> Headers
140 toHeaders xs = mkHeaders xs M.empty
143 mkHeaders :: [(Strict.ByteString, Strict.ByteString)] -> Headers -> Headers
145 mkHeaders ((key, val):xs) m = mkHeaders xs $
146 case M.lookup (toNCBS key) m of
147 Nothing -> M.insert (toNCBS key) val m
148 Just old -> M.insert (toNCBS key) (merge old val) m
150 merge :: Strict.ByteString -> Strict.ByteString -> Strict.ByteString
151 -- カンマ區切りである事を假定する。RFC ではカンマ區切りに出來ない
152 -- ヘッダは複數個あってはならない事になってゐる。
154 | C8.null a && C8.null b = C8.empty
157 | otherwise = C8.concat [a, C8.pack ", ", b]
160 fromHeaders :: Headers -> [(Strict.ByteString, Strict.ByteString)]
161 fromHeaders hs = [(fromNCBS a, b) | (a, b) <- M.toList hs]
165 message-header = field-name ":" [ field-value ]
167 field-value = *( field-content | LWS )
168 field-content = <field-value を構成し、*TEXT あるいは
169 token, separators, quoted-string を連結
172 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
175 headersP :: Parser Headers
176 headersP = do xs <- many header
178 return $! toHeaders xs
180 header :: Parser (Strict.ByteString, Strict.ByteString)
181 header = do name <- token
183 -- FIXME: これは多少インチキだが、RFC 2616 のこの部分
184 -- の記述はひどく曖昧であり、この動作が本當に間違って
185 -- ゐるのかどうかも良く分からない。例へば
186 -- quoted-string の内部にある空白は纏めていいのか惡い
187 -- のか?直勸的には駄目さうに思へるが、そんな記述は見
189 contents <- many (lws <|> many1 text)
191 let value = foldr (++) "" contents
192 norm = normalize value
193 return (C8.pack name, C8.pack norm)
195 normalize :: String -> String
196 normalize = trimBody . trim isWhiteSpace
199 . map (\ s -> if head s == ' ' then
204 . map (\ c -> if isWhiteSpace c
209 hPutHeaders :: HandleLike h => h -> Headers -> IO ()
212 mapM_ putH (M.toList hds) >> hPutBS h (C8.pack "\r\n")
214 putH :: (NCBS, Strict.ByteString) -> IO ()
216 = name `seq` value `seq`
217 do hPutBS h (fromNCBS name)
218 hPutBS h (C8.pack ": ")
220 hPutBS h (C8.pack "\r\n")