2 GeneralizedNewtypeDeriving
6 module Network.HTTP.Lucu.Headers
19 import Control.Applicative
20 import Data.Ascii (Ascii, AsciiBuilder, CIAscii)
21 import qualified Data.Ascii as A
22 import Data.Attoparsec.Char8 as P
23 import qualified Data.ByteString as BS
25 import qualified Data.Map as M
27 import Data.Monoid.Unicode
28 import Network.HTTP.Lucu.Parser.Http
29 import Network.HTTP.Lucu.Utils
30 import Prelude.Unicode
33 = Headers (Map CIAscii Ascii)
34 deriving (Eq, Show, Monoid)
36 class HasHeaders a where
37 getHeaders ∷ a → Headers
38 setHeaders ∷ a → Headers → a
40 getHeader ∷ CIAscii → a → Maybe Ascii
42 = case getHeaders a of
43 Headers m → M.lookup key m
45 getCIHeader ∷ CIAscii → a → Maybe CIAscii
46 {-# INLINE getCIHeader #-}
48 = A.toCIAscii <$> getHeader key a
50 deleteHeader ∷ CIAscii → a → a
51 {-# INLINE deleteHeader #-}
53 = case getHeaders a of
55 → setHeaders a $ Headers $ M.delete key m
57 setHeader ∷ CIAscii → Ascii → a → a
58 {-# INLINE setHeader #-}
60 = case getHeaders a of
62 → setHeaders a $ Headers $ M.insert key val m
64 instance HasHeaders Headers where
68 singleton ∷ CIAscii → Ascii → Headers
69 {-# INLINE singleton #-}
71 = Headers $ M.singleton key val
73 toHeaders ∷ [(CIAscii, Ascii)] → Headers
74 {-# INLINE toHeaders #-}
75 toHeaders = flip mkHeaders (∅)
77 mkHeaders ∷ [(CIAscii, Ascii)] → Headers → Headers
78 mkHeaders [] (Headers m) = Headers m
79 mkHeaders ((key, val):xs) (Headers m)
80 = mkHeaders xs $ Headers $
81 case M.lookup key m of
82 Nothing → M.insert key val m
83 Just old → M.insert key (merge old val) m
85 merge ∷ Ascii → Ascii → Ascii
88 | nullA a ∧ nullA b = (∅)
91 | otherwise = a ⊕ ", " ⊕ b
95 nullA = BS.null ∘ A.toByteString
97 fromHeaders ∷ Headers → [(CIAscii, Ascii)]
98 fromHeaders (Headers m) = M.toList m
101 message-header = field-name ":" [ field-value ]
103 field-value = *( field-content | LWS )
104 field-content = <field-value を構成し、*TEXT あるいは
105 token, separators, quoted-string を連結
108 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
111 headersP ∷ Parser Headers
112 {-# INLINEABLE headersP #-}
113 headersP = do xs ← P.many header
115 return $ toHeaders xs
117 header ∷ Parser (CIAscii, Ascii)
118 header = do name ← A.toCIAscii <$> token
121 values ← sepBy content (try lws)
124 return (name, joinValues values)
126 content ∷ Parser Ascii
127 {-# INLINE content #-}
128 content = A.unsafeFromByteString
130 takeWhile1 (\c → ((¬) (isSPHT c)) ∧ isText c)
132 joinValues ∷ [Ascii] → Ascii
133 {-# INLINE joinValues #-}
134 joinValues = A.fromAsciiBuilder ∘ joinWith "\x20" ∘ map A.toAsciiBuilder
136 printHeaders ∷ Headers → AsciiBuilder
137 printHeaders (Headers m)
138 = mconcat (map printHeader (M.toList m)) ⊕
139 A.toAsciiBuilder "\x0D\x0A"
141 printHeader ∷ (CIAscii, Ascii) → AsciiBuilder
142 printHeader (name, value)
143 = A.toAsciiBuilder (A.fromCIAscii name) ⊕
144 A.toAsciiBuilder ": " ⊕
145 A.toAsciiBuilder value ⊕
146 A.toAsciiBuilder "\x0D\x0A"