{-# LANGUAGE
- GeneralizedNewtypeDeriving
+ 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(..)
-
- , toHeaders
- , fromHeaders
-
- , headersP
- , printHeaders
)
where
-import Control.Applicative
+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 as P
-import qualified Data.ByteString as BS
-import Data.Map (Map)
-import qualified Data.Map as M
+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 Network.HTTP.Lucu.Utils
+import Prelude hiding (lookup, null)
import Prelude.Unicode
newtype Headers
- = Headers (Map CIAscii Ascii)
- deriving (Eq, Show, Monoid)
+ = Headers (M.Map CIAscii Ascii)
+ deriving (Eq, Show)
class HasHeaders a where
getHeaders ∷ a → Headers
setHeaders ∷ a → Headers → a
+ modifyHeaders ∷ (Headers → Headers) → a → a
+ {-# INLINE modifyHeaders #-}
+ modifyHeaders = (setHeaders ⊛) ∘ (∘ getHeaders)
+
getHeader ∷ CIAscii → a → Maybe Ascii
- getHeader key a
- = case getHeaders a of
- Headers m → M.lookup key m
+ {-# INLINE getHeader #-}
+ getHeader = (∘ getHeaders) ∘ lookup
+
+ hasHeader ∷ CIAscii → a → Bool
+ {-# INLINE hasHeader #-}
+ hasHeader = (∘ getHeaders) ∘ member
getCIHeader ∷ CIAscii → a → Maybe CIAscii
{-# INLINE getCIHeader #-}
- getCIHeader key a
- = A.toCIAscii <$> getHeader key a
+ getCIHeader = ((cs <$>) ∘) ∘ getHeader
deleteHeader ∷ CIAscii → a → a
{-# INLINE deleteHeader #-}
- deleteHeader key a
- = case getHeaders a of
- Headers m
- → setHeaders a $ Headers $ M.delete key m
+ deleteHeader = modifyHeaders ∘ delete
setHeader ∷ CIAscii → Ascii → a → a
{-# INLINE setHeader #-}
- setHeader key val a
- = case getHeaders a of
- Headers m
- → setHeaders a $ Headers $ M.insert key val m
+ setHeader = (modifyHeaders ∘) ∘ insertWith const
instance HasHeaders Headers where
getHeaders = id
setHeaders _ = id
-toHeaders ∷ [(CIAscii, Ascii)] → Headers
-{-# INLINE toHeaders #-}
-toHeaders = flip mkHeaders (∅)
-
-mkHeaders ∷ [(CIAscii, Ascii)] → Headers → Headers
-mkHeaders [] (Headers m) = Headers m
-mkHeaders ((key, val):xs) (Headers m)
- = mkHeaders xs $ Headers $
- case M.lookup key m of
- Nothing → M.insert key val m
- Just old → M.insert key (merge old val) m
+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
- merge ∷ Ascii → Ascii → Ascii
- {-# INLINE merge #-}
- merge a b
- | nullA a ∧ nullA b = (∅)
- | nullA a = b
- | nullA b = a
- | otherwise = a ⊕ ", " ⊕ b
-
nullA ∷ Ascii → Bool
{-# INLINE nullA #-}
- nullA = BS.null ∘ A.toByteString
-
-fromHeaders ∷ Headers → [(CIAscii, Ascii)]
-fromHeaders (Headers m) = M.toList m
+ 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
-{-# INLINEABLE headersP #-}
-headersP = do xs ← P.many header
- crlf
- return $ toHeaders xs
- where
- header ∷ Parser (CIAscii, Ascii)
- header = do name ← A.toCIAscii <$> token
- _ ← char ':'
- skipMany lws
- values ← sepBy content (try lws)
- skipMany (try lws)
- crlf
- return (name, joinValues values)
-
- content ∷ Parser Ascii
- {-# INLINE content #-}
- content = A.unsafeFromByteString
- <$>
- takeWhile1 (\c → ((¬) (isSPHT c)) ∧ isText c)
-
- joinValues ∷ [Ascii] → Ascii
- {-# INLINE joinValues #-}
- joinValues = A.fromAsciiBuilder ∘ joinWith "\x20" ∘ map A.toAsciiBuilder
-
-printHeaders ∷ Headers → AsciiBuilder
-printHeaders (Headers m)
- = mconcat (map printHeader (M.toList m)) ⊕
- A.toAsciiBuilder "\x0D\x0A"
- where
- printHeader ∷ (CIAscii, Ascii) → AsciiBuilder
- printHeader (name, value)
- = A.toAsciiBuilder (A.fromCIAscii name) ⊕
- A.toAsciiBuilder ": " ⊕
- A.toAsciiBuilder value ⊕
- A.toAsciiBuilder "\x0D\x0A"
+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
+ <$>
+ takeWhile1 (\c → isText c ∧ c ≢ '\x20')
+
+ joinValues ∷ [Ascii] → Ascii
+ {-# INLINEABLE joinValues #-}
+ joinValues = cs
+ ∘ mconcat
+ ∘ intersperse (cs ("\x20" ∷ Ascii) ∷ AsciiBuilder)
+ ∘ (cs <$>)
projects / Lucu.git / blobdiff