2 GeneralizedNewtypeDeriving
6 module Network.HTTP.Lucu.Headers
17 import Control.Applicative
18 import Data.Ascii (Ascii, AsciiBuilder, CIAscii)
19 import qualified Data.Ascii as A
20 import Data.Attoparsec.Char8 as P
21 import qualified Data.ByteString as BS
23 import qualified Data.Map as M
25 import Data.Monoid.Unicode
26 import Network.HTTP.Lucu.Parser.Http
27 import Network.HTTP.Lucu.Utils
28 import Prelude.Unicode
31 = Headers (Map CIAscii Ascii)
32 deriving (Eq, Show, Monoid)
34 class HasHeaders a where
35 getHeaders ∷ a → Headers
36 setHeaders ∷ a → Headers → a
38 getHeader ∷ CIAscii → a → Maybe Ascii
40 = case getHeaders a of
41 Headers m → M.lookup key m
43 getCIHeader ∷ CIAscii → a → Maybe CIAscii
44 {-# INLINE getCIHeader #-}
46 = A.toCIAscii <$> getHeader key a
48 deleteHeader ∷ CIAscii → a → a
49 {-# INLINE deleteHeader #-}
51 = case getHeaders a of
53 → setHeaders a $ Headers $ M.delete key m
55 setHeader ∷ CIAscii → Ascii → a → a
56 {-# INLINE setHeader #-}
58 = case getHeaders a of
60 → setHeaders a $ Headers $ M.insert key val m
62 instance HasHeaders Headers where
66 toHeaders ∷ [(CIAscii, Ascii)] → Headers
67 {-# INLINE toHeaders #-}
68 toHeaders = flip mkHeaders (∅)
70 mkHeaders ∷ [(CIAscii, Ascii)] → Headers → Headers
71 mkHeaders [] (Headers m) = Headers m
72 mkHeaders ((key, val):xs) (Headers m)
73 = mkHeaders xs $ Headers $
74 case M.lookup key m of
75 Nothing → M.insert key val m
76 Just old → M.insert key (merge old val) m
78 merge ∷ Ascii → Ascii → Ascii
81 | nullA a ∧ nullA b = (∅)
84 | otherwise = a ⊕ ", " ⊕ b
88 nullA = BS.null ∘ A.toByteString
90 fromHeaders ∷ Headers → [(CIAscii, Ascii)]
91 fromHeaders (Headers m) = M.toList m
94 message-header = field-name ":" [ field-value ]
96 field-value = *( field-content | LWS )
97 field-content = <field-value を構成し、*TEXT あるいは
98 token, separators, quoted-string を連結
101 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
104 headersP ∷ Parser Headers
105 {-# INLINEABLE headersP #-}
106 headersP = do xs ← P.many header
108 return $ toHeaders xs
110 header ∷ Parser (CIAscii, Ascii)
111 header = do name ← A.toCIAscii <$> token
114 values ← sepBy content (try lws)
117 return (name, joinValues values)
119 content ∷ Parser Ascii
120 {-# INLINE content #-}
121 content = A.unsafeFromByteString
123 takeWhile1 (\c → ((¬) (isSPHT c)) ∧ isText c)
125 joinValues ∷ [Ascii] → Ascii
126 {-# INLINE joinValues #-}
127 joinValues = A.fromAsciiBuilder ∘ joinWith "\x20" ∘ map A.toAsciiBuilder
129 printHeaders ∷ Headers → AsciiBuilder
130 printHeaders (Headers m)
131 = mconcat (map printHeader (M.toList m)) ⊕
132 A.toAsciiBuilder "\x0D\x0A"
134 printHeader ∷ (CIAscii, Ascii) → AsciiBuilder
135 printHeader (name, value)
136 = A.toAsciiBuilder (A.fromCIAscii name) ⊕
137 A.toAsciiBuilder ": " ⊕
138 A.toAsciiBuilder value ⊕
139 A.toAsciiBuilder "\x0D\x0A"