--- #hide
+{-# 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
- , headersP
- , hPutHeaders
+ , 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
- = key `seq` a `seq`
- 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
- = key `seq` a `seq`
- 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
- = key `seq` val `seq` a `seq`
- 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
- = key `seq` val `seq` a `seq`
- 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
+ {-# INLINEABLE convertSuccess #-}
+ convertSuccess (Headers m)
+ = mconcat (header <$> fromFoldable m) ⊕ cs ("\x0D\x0A" ∷ Ascii)
+ where
+ header ∷ (CIAscii, Ascii) → AsciiBuilder
+ {-# INLINE header #-}
+ 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 ]
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)
-
- 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 hds >> hPutStr h "\r\n"
- where
- putH :: (String, String) -> IO ()
- putH (name, value)
- = name `seq` value `seq`
- do hPutStr h name
- hPutStr h ": "
- hPutStr h value
- hPutStr h "\r\n"
+ return (name, joinValues values)
+
+ content ∷ Parser Ascii
+ {-# INLINE content #-}
+ content = A.unsafeFromByteString
+ <$>
+ takeWhile1 (\c → isText c ∧ c ≢ '\x20')
+
+ joinValues ∷ [Ascii] → Ascii
+ {-# INLINE joinValues #-}
+ joinValues = A.fromAsciiBuilder
+ ∘ mconcat
+ ∘ intersperse (A.toAsciiBuilder "\x20")
+ ∘ (A.toAsciiBuilder <$>)
projects / Lucu.git / blobdiff