Better name-rewriting engine

[Lucu.git] / Network / HTTP / Lucu / Headers.hs

diff --git a/Network/HTTP/Lucu/Headers.hs b/Network/HTTP/Lucu/Headers.hs
index b36927d9bc13978ce9a7116883b69f0901b369bd..80b9b1339501d95a08c80511645e3603a5b1d9ea 100644 (file)
--- a/Network/HTTP/Lucu/Headers.hs
+++ b/Network/HTTP/Lucu/Headers.hs
@@ -3,28 +3,33 @@
   , OverloadedStrings
   , UnicodeSyntax
   #-}
+-- |An internal module for HTTP headers.
 module Network.HTTP.Lucu.Headers
     ( Headers
     , HasHeaders(..)
 
+    , singleton
+
     , toHeaders
     , fromHeaders
 
-    , headersP
+    , headers
     , printHeaders
     )
     where
 import Control.Applicative
+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.List
 import Data.Map (Map)
 import qualified Data.Map as M
+import qualified Data.Map.Unicode as M
 import Data.Monoid
 import Data.Monoid.Unicode
 import Network.HTTP.Lucu.Parser.Http
-import Network.HTTP.Lucu.Utils
 import Prelude.Unicode
 
 newtype Headers
@@ -40,6 +45,12 @@ class HasHeaders a where
         = case getHeaders a of
             Headers m → M.lookup key m
 
+    hasHeader ∷ CIAscii → a → Bool
+    {-# INLINE hasHeader #-}
+    hasHeader key a
+        = case getHeaders a of
+            Headers m → key M.∈ m
+
     getCIHeader ∷ CIAscii → a → Maybe CIAscii
     {-# INLINE getCIHeader #-}
     getCIHeader key a
@@ -63,6 +74,11 @@ instance HasHeaders Headers where
     getHeaders   = id
     setHeaders _ = id
 
+singleton ∷ CIAscii → Ascii → Headers
+{-# INLINE singleton #-}
+singleton key val
+    = Headers $ M.singleton key val
+
 toHeaders ∷ [(CIAscii, Ascii)] → Headers
 {-# INLINE toHeaders #-}
 toHeaders = flip mkHeaders (∅)
@@ -101,17 +117,17 @@ fromHeaders (Headers m) = M.toList m
   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
+headers ∷ Parser Headers
+{-# INLINEABLE headers #-}
+headers = do xs ← P.many header
+             crlf
+             return $ toHeaders xs
     where
       header ∷ Parser (CIAscii, Ascii)
       header = do name ← A.toCIAscii <$> token
-                  _    ← char ':'
+                  void $ char ':'
                   skipMany lws
-                  values ← sepBy content (try lws)
+                  values ← content `sepBy` try lws
                   skipMany (try lws)
                   crlf
                   return (name, joinValues values)
@@ -120,11 +136,14 @@ headersP = do xs ← P.many header
       {-# INLINE content #-}
       content = A.unsafeFromByteString
                 <$>
-                takeWhile1 (\c → ((¬) (isSPHT c)) ∧ isText c)
+                takeWhile1 (\c → isText c ∧ c ≢ '\x20')
 
       joinValues ∷ [Ascii] → Ascii
       {-# INLINE joinValues #-}
-      joinValues = A.fromAsciiBuilder ∘ joinWith "\x20" ∘ map A.toAsciiBuilder
+      joinValues = A.fromAsciiBuilder
+                   ∘ mconcat
+                   ∘ intersperse (A.toAsciiBuilder "\x20")
+                   ∘ map A.toAsciiBuilder
 
 printHeaders ∷ Headers → AsciiBuilder
 printHeaders (Headers m)