3 , GeneralizedNewtypeDeriving
4 , MultiParamTypeClasses
9 -- |An internal module for HTTP headers.
10 module Network.HTTP.Lucu.Headers
18 import Control.Applicative
19 import Control.Applicative.Unicode hiding ((∅))
22 import Data.Ascii (Ascii, AsciiBuilder, CIAscii)
23 import qualified Data.Ascii as A
24 import Data.Attoparsec.Char8 as P
25 import Data.List (intersperse)
26 import qualified Data.Map as M
27 import Data.Collections
28 import Data.Collections.BaseInstances ()
30 import Data.Monoid.Unicode
31 import Network.HTTP.Lucu.Parser.Http
32 import Prelude hiding (filter, lookup, null)
33 import Prelude.Unicode
36 = Headers (M.Map CIAscii Ascii)
37 deriving (Eq, Monoid, Show)
39 class HasHeaders a where
40 getHeaders ∷ a → Headers
41 setHeaders ∷ a → Headers → a
43 modifyHeaders ∷ (Headers → Headers) → a → a
44 {-# INLINE modifyHeaders #-}
45 modifyHeaders = (setHeaders ⊛) ∘ (∘ getHeaders)
47 getHeader ∷ CIAscii → a → Maybe Ascii
48 {-# INLINE getHeader #-}
49 getHeader = (∘ getHeaders) ∘ lookup
51 hasHeader ∷ CIAscii → a → Bool
52 {-# INLINE hasHeader #-}
53 hasHeader = (∘ getHeaders) ∘ member
55 getCIHeader ∷ CIAscii → a → Maybe CIAscii
56 {-# INLINE getCIHeader #-}
57 getCIHeader = ((A.toCIAscii <$>) ∘) ∘ getHeader
59 deleteHeader ∷ CIAscii → a → a
60 {-# INLINE deleteHeader #-}
61 deleteHeader = modifyHeaders ∘ delete
63 setHeader ∷ CIAscii → Ascii → a → a
64 {-# INLINE setHeader #-}
65 setHeader = (modifyHeaders ∘) ∘ insertWith const
67 instance HasHeaders Headers where
71 -- |@'insert' (key, val)@ merges @val@ with an existing one if any.
72 instance Unfoldable Headers (CIAscii, Ascii) where
74 insert (key, val) (Headers m)
75 = Headers $ insertWith merge key val m
77 instance Foldable Headers (CIAscii, Ascii) where
78 {-# INLINE foldMap #-}
79 foldMap f (Headers m) = foldMap f m
81 instance Collection Headers (CIAscii, Ascii) where
83 filter f (Headers m) = Headers $ filter f m
85 instance Indexed Headers CIAscii Ascii where
87 index k (Headers m) = index k m
89 adjust f k (Headers m) = Headers $ adjust f k m
90 {-# INLINE inDomain #-}
91 inDomain k (Headers m) = inDomain k m
93 instance Map Headers CIAscii Ascii where
95 lookup k (Headers m) = lookup k m
96 {-# INLINE insertWith #-}
97 insertWith f k v (Headers m)
98 = Headers $ insertWith f k v m
99 {-# INLINE mapWithKey #-}
100 mapWithKey f (Headers m)
101 = Headers $ mapWithKey f m
102 {-# INLINE unionWith #-}
103 unionWith f (Headers α) (Headers β)
104 = Headers $ unionWith f α β
105 {-# INLINE intersectionWith #-}
106 intersectionWith f (Headers α) (Headers β)
107 = Headers $ intersectionWith f α β
108 {-# INLINE differenceWith #-}
109 differenceWith f (Headers α) (Headers β)
110 = Headers $ differenceWith f α β
111 {-# INLINE isSubmapBy #-}
112 isSubmapBy f (Headers α) (Headers β)
114 {-# INLINE isProperSubmapBy #-}
115 isProperSubmapBy f (Headers α) (Headers β)
116 = isProperSubmapBy f α β
118 instance SortingCollection Headers (CIAscii, Ascii) where
119 {-# INLINE minView #-}
120 minView (Headers m) = second Headers <$> minView m
122 merge ∷ Ascii → Ascii → Ascii
125 | nullA a ∧ nullA b = (∅)
128 | otherwise = a ⊕ ", " ⊕ b
132 nullA = null ∘ A.toByteString
135 message-header = field-name ":" [ field-value ]
137 field-value = *( field-content | LWS )
138 field-content = <field-value を構成し、*TEXT あるいは
139 token, separators, quoted-string を連結
142 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
145 headers ∷ Parser Headers
146 {-# INLINEABLE headers #-}
147 headers = do xs ← P.many header
149 return $ fromFoldable xs
151 header ∷ Parser (CIAscii, Ascii)
152 header = do name ← A.toCIAscii <$> token
155 values ← content `sepBy` try lws
158 return (name, joinValues values)
160 content ∷ Parser Ascii
161 {-# INLINE content #-}
162 content = A.unsafeFromByteString
164 takeWhile1 (\c → isText c ∧ c ≢ '\x20')
166 joinValues ∷ [Ascii] → Ascii
167 {-# INLINE joinValues #-}
168 joinValues = A.fromAsciiBuilder
170 ∘ intersperse (A.toAsciiBuilder "\x20")
171 ∘ map A.toAsciiBuilder
173 printHeaders ∷ Headers → AsciiBuilder
174 printHeaders (Headers m)
175 = mconcat (map printHeader (fromFoldable m)) ⊕
176 A.toAsciiBuilder "\x0D\x0A"
178 printHeader ∷ (CIAscii, Ascii) → AsciiBuilder
179 printHeader (name, value)
180 = A.toAsciiBuilder (A.fromCIAscii name) ⊕
181 A.toAsciiBuilder ": " ⊕
182 A.toAsciiBuilder value ⊕
183 A.toAsciiBuilder "\x0D\x0A"