3 , GeneralizedNewtypeDeriving
7 module Network.HTTP.Lucu.Headers
18 import Control.Applicative
19 import Data.Ascii (Ascii, AsciiBuilder, CIAscii)
20 import qualified Data.Ascii as A
21 import Data.Attoparsec.Char8 as P
22 import qualified Data.ByteString as BS
24 import qualified Data.Map as M
26 import Data.Monoid.Unicode
27 import Network.HTTP.Lucu.Parser.Http
28 import Network.HTTP.Lucu.Utils
29 import Prelude.Unicode
32 = Headers (Map CIAscii Ascii)
33 deriving (Eq, Show, Monoid)
35 class HasHeaders a where
36 getHeaders ∷ a → Headers
37 setHeaders ∷ a → Headers → a
39 getHeader ∷ CIAscii → a → Maybe Ascii
40 {-# INLINE getHeader #-}
42 = case getHeaders a of
43 Headers m → M.lookup key m
45 deleteHeader ∷ CIAscii → a → a
46 {-# INLINE deleteHeader #-}
48 = case getHeaders a of
50 → setHeaders a $ Headers $ M.delete key m
52 setHeader ∷ CIAscii → Ascii → a → a
53 {-# INLINE setHeader #-}
54 setHeader !key !val !a
55 = case getHeaders a of
57 → setHeaders a $ Headers $ M.insert key val m
59 instance HasHeaders Headers where
63 toHeaders ∷ [(CIAscii, Ascii)] → Headers
64 {-# INLINE toHeaders #-}
65 toHeaders = flip mkHeaders (∅)
67 mkHeaders ∷ [(CIAscii, Ascii)] → Headers → Headers
68 mkHeaders [] (Headers m) = Headers m
69 mkHeaders ((key, val):xs) (Headers m)
70 = mkHeaders xs $ Headers $
71 case M.lookup key m of
72 Nothing → M.insert key val m
73 Just old → M.insert key (merge old val) m
75 merge ∷ Ascii → Ascii → Ascii
78 | nullA a ∧ nullA b = (∅)
81 | otherwise = a ⊕ ", " ⊕ b
85 nullA = BS.null ∘ A.toByteString
87 fromHeaders ∷ Headers → [(CIAscii, Ascii)]
88 fromHeaders (Headers m) = M.toList m
91 message-header = field-name ":" [ field-value ]
93 field-value = *( field-content | LWS )
94 field-content = <field-value を構成し、*TEXT あるいは
95 token, separators, quoted-string を連結
98 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
101 headersP ∷ Parser Headers
102 {-# INLINEABLE headersP #-}
103 headersP = do xs ← P.many header
105 return $ toHeaders xs
107 header ∷ Parser (CIAscii, Ascii)
108 header = do name ← A.toCIAscii <$> token
111 values ← sepBy content (try lws)
114 return (name, joinValues values)
116 content ∷ Parser Ascii
117 {-# INLINE content #-}
118 content = A.unsafeFromByteString
120 takeWhile1 (\c → ((¬) (isSPHT c)) ∧ isText c)
122 joinValues ∷ [Ascii] → Ascii
123 {-# INLINE joinValues #-}
124 joinValues = A.fromAsciiBuilder ∘ joinWith "\x20" ∘ map A.toAsciiBuilder
126 printHeaders ∷ Headers → AsciiBuilder
127 printHeaders (Headers m)
128 = mconcat (map printHeader (M.toList m)) ⊕
129 A.toAsciiBuilder "\x0D\x0A"
131 printHeader ∷ (CIAscii, Ascii) → AsciiBuilder
132 printHeader (name, value)
133 = A.toAsciiBuilder (A.fromCIAscii name) ⊕
134 A.toAsciiBuilder ": " ⊕
135 A.toAsciiBuilder value ⊕
136 A.toAsciiBuilder "\x0D\x0A"