It (at least) builds now...

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

diff --git a/Network/HTTP/Lucu/Utils.hs b/Network/HTTP/Lucu/Utils.hs
index 1070d66f28042193a0337b02f1e9d858d63c9403..d36c81b2853cb7e01adf861bed59e344b4181f7c 100644 (file)
--- a/Network/HTTP/Lucu/Utils.hs
+++ b/Network/HTTP/Lucu/Utils.hs
@@ -5,9 +5,16 @@
   #-}
 -- |Utility functions used internally in this package.
 module Network.HTTP.Lucu.Utils
-    ( splitBy
+    ( Scheme
+    , Host
+    , PathSegment
+    , PathSegments
+
+    , splitBy
     , quoteStr
     , parseWWWFormURLEncoded
+    , uriCIScheme
+    , uriHost
     , uriPathSegments
     , trim
 
@@ -21,15 +28,20 @@ module Network.HTTP.Lucu.Utils
     where
 import Control.Applicative hiding (empty)
 import Control.Monad hiding (mapM)
-import Data.Ascii (Ascii, AsciiBuilder)
+import Data.Ascii (Ascii, AsciiBuilder, CIAscii)
 import qualified Data.Ascii as A
 import Data.ByteString (ByteString)
-import qualified Data.ByteString.Char8 as Strict
+import qualified Data.ByteString.Char8 as BS
+import Data.CaseInsensitive (CI)
+import qualified Data.CaseInsensitive as CI
 import Data.Char
 import Data.Collections
 import Data.Collections.BaseInstances ()
+import Data.Maybe
 import Data.Monoid.Unicode
 import Data.Ratio
+import Data.Text (Text)
+import qualified Data.Text as T
 import Data.Time
 import Data.Time.Clock.POSIX
 import Network.URI
@@ -38,6 +50,20 @@ import Prelude.Unicode
 import System.Directory
 import System.Time (ClockTime(..))
 
+-- |'Scheme' represents an URI scheme.
+type Scheme = CIAscii
+
+-- |'Host' represents an IP address or a host name in an URI
+-- authority.
+type Host = CI Text
+
+-- |'PathSegment' represents an URI path segment, split by slashes and
+-- percent-decoded.
+type PathSegment = ByteString
+
+-- |'PathSegments' is a list of URI path segments.
+type PathSegments = [PathSegment]
+
 -- |>>> splitBy (== ':') "ab:c:def"
 -- ["ab", "c", "def"]
 splitBy ∷ (a → Bool) → [a] → [[a]]
@@ -57,17 +83,17 @@ quoteStr str = A.toAsciiBuilder "\"" ⊕
                go (A.toByteString str) (∅) ⊕
                A.toAsciiBuilder "\""
     where
-      go ∷ Strict.ByteString → AsciiBuilder → AsciiBuilder
+      go ∷ ByteString → AsciiBuilder → AsciiBuilder
       go bs ab
-          = case Strict.break (≡ '"') bs of
+          = case BS.break (≡ '"') bs of
               (x, y)
-                  | Strict.null y
+                  | BS.null y
                       → ab ⊕ b2ab x
                   | otherwise
-                      → go (Strict.tail y)
+                      → go (BS.tail y)
                            (ab ⊕ b2ab x ⊕ A.toAsciiBuilder "\\\"")
 
-      b2ab ∷ Strict.ByteString → AsciiBuilder
+      b2ab ∷ ByteString → AsciiBuilder
       b2ab = A.toAsciiBuilder ∘ A.unsafeFromByteString
 
 -- |>>> parseWWWFormURLEncoded "aaa=bbb&ccc=ddd"
@@ -86,20 +112,33 @@ parseWWWFormURLEncoded src
                             )
     where
       unescape ∷ String → ByteString
-      unescape = Strict.pack ∘ unEscapeString ∘ (plusToSpace <$>)
+      unescape = BS.pack ∘ unEscapeString ∘ (plusToSpace <$>)
 
       plusToSpace ∷ Char → Char
       plusToSpace '+' = ' '
       plusToSpace c   = c
 
+-- |>>> uriCIScheme "http://example.com/foo/bar"
+-- "http"
+uriCIScheme ∷ URI → Scheme
+{-# INLINE uriCIScheme #-}
+uriCIScheme = A.toCIAscii ∘ A.unsafeFromString ∘ uriScheme
+
+-- |>>> uriHost "http://example.com/foo/bar"
+-- "example.com"
+uriHost ∷ URI → Host
+{-# INLINE uriHost #-}
+uriHost = CI.mk ∘ T.pack ∘ uriRegName ∘ fromJust ∘ uriAuthority
+
 -- |>>> uriPathSegments "http://example.com/foo/bar"
 -- ["foo", "bar"]
-uriPathSegments ∷ URI → [ByteString]
+uriPathSegments ∷ URI → PathSegments
 uriPathSegments uri
     = let reqPathStr = uriPath uri
-          reqPath    = [unEscapeString x | x ← splitBy (≡ '/') reqPathStr, (¬) (null x)]
+          reqPath    = [ unEscapeString x
+                         | x ← splitBy (≡ '/') reqPathStr, (¬) (null x) ]
       in
-        Strict.pack <$> reqPath
+        BS.pack <$> reqPath
 
 -- |>>> trim "  ab c d "
 -- "ab c d"