+{-# 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
)
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.Default
+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 qualified Data.ByteString.Lazy.Char8 as B
-import Data.ByteString.Lazy.Char8 (ByteString)
-import Data.Char
-import Data.List
-
-type Headers = [ (ByteString, ByteString) ]
+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
+
+ getCIHeader ∷ CIAscii → a → Maybe CIAscii
+ {-# INLINE getCIHeader #-}
+ getCIHeader = ((cs <$>) ∘) ∘ 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
+
+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
- getHeader :: a -> ByteString -> Maybe ByteString
- getHeader a key
- = fmap snd $ find (noCaseEq key . fst) (getHeaders a)
+instance ConvertSuccess Headers Ascii where
+ {-# INLINE convertSuccess #-}
+ convertSuccess = convertSuccessVia ((⊥) ∷ AsciiBuilder)
- deleteHeader :: a -> ByteString -> a
- deleteHeader a key
- = setHeaders a $ filter (not . noCaseEq key . fst) (getHeaders a)
+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)
- addHeader :: a -> ByteString -> ByteString -> a
- addHeader a key val
- = setHeaders a $ (getHeaders a) ++ [(key, val)]
+deriveAttempts [ ([t| Headers |], [t| Ascii |])
+ , ([t| Headers |], [t| AsciiBuilder |])
+ ]
- setHeader :: a -> ByteString -> ByteString -> a
- setHeader a key val
- = let list = getHeaders a
- deleted = filter (not . noCaseEq key . fst) list
- added = deleted ++ [(key, val)]
- in
- setHeaders a added
+{-
+ message-header = field-name ":" [ field-value ]
+ field-name = token
+ field-value = *( field-content | LWS )
+ field-content = <field-value を構成し、*TEXT あるいは
+ token, separators, quoted-string を連結
+ したものから成る OCTET>
-noCaseEq :: ByteString -> ByteString -> Bool
-noCaseEq a b
- = (B.map toLower a) == (B.map toLower b)
+ 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。
+-}
+instance Default (Parser Headers) where
+ {-# INLINEABLE def #-}
+ def = do xs ← many header
+ crlf
+ return $ fromFoldable xs
+ where
+ header ∷ Parser (CIAscii, Ascii)
+ {-# INLINEABLE header #-}
+ header = do name ← cs <$> token
+ void $ char ':'
+ skipMany lws
+ values ← content `sepBy` try lws
+ skipMany (try lws)
+ crlf
+ return (name, joinValues values)
+ content ∷ Parser Ascii
+ {-# INLINEABLE content #-}
+ content = A.unsafeFromByteString
+ <$>
+ takeWhile1 (\c → isText c ∧ c ≢ '\x20')
-emptyHeaders :: Headers
-emptyHeaders = []
\ No newline at end of file
+ joinValues ∷ [Ascii] → Ascii
+ {-# INLINEABLE joinValues #-}
+ joinValues = cs
+ ∘ mconcat
+ ∘ intersperse (cs ("\x20" ∷ Ascii) ∷ AsciiBuilder)
+ ∘ (cs <$>)
projects / Lucu.git / blobdiff