X-Git-Url: http://git.cielonegro.org/gitweb.cgi?a=blobdiff_plain;f=Network%2FHTTP%2FLucu%2FUtils.hs;h=7dbb1162cbda616ae5eb57ce989bc481f813a9ac;hb=ece223c;hp=d2541691ced99dd41ac579d146224fa7657a8f7a;hpb=e34910f85f459f049b9e6e6b79db9ef95dfccc13;p=Lucu.git

diff --git a/Network/HTTP/Lucu/Utils.hs b/Network/HTTP/Lucu/Utils.hs
index d254169..7dbb116 100644
--- a/Network/HTTP/Lucu/Utils.hs
+++ b/Network/HTTP/Lucu/Utils.hs
@@ -1,20 +1,23 @@
 {-# LANGUAGE
-    BangPatterns
-  , OverloadedStrings
+    OverloadedStrings
   , UnicodeSyntax
   #-}
 -- |Utility functions used internally in the Lucu httpd. These
 -- functions may be useful too for something else.
 module Network.HTTP.Lucu.Utils
     ( splitBy
-    , joinWith
     , quoteStr
     , parseWWWFormURLEncoded
+    , splitPathInfo
+    , show3
     )
     where
+import Blaze.ByteString.Builder.ByteString as B
+import Blaze.Text.Int as BT
 import Control.Monad
 import Data.Ascii (Ascii, AsciiBuilder)
 import qualified Data.Ascii as A
+import Data.ByteString (ByteString)
 import qualified Data.ByteString.Char8 as BS
 import Data.List hiding (last)
 import Data.Monoid.Unicode
@@ -25,22 +28,11 @@ import Prelude.Unicode
 -- |> splitBy (== ':') "ab:c:def"
 --  > ==> ["ab", "c", "def"]
 splitBy ∷ (a → Bool) → [a] → [[a]]
+{-# INLINEABLE splitBy #-}
 splitBy isSep src
-    = case break isSep src
-      of (last , []       ) → [last]
-         (first, _sep:rest) → first : splitBy isSep rest
-
--- |> joinWith ":" ["ab", "c", "def"]
---  > ==> "ab:c:def"
-joinWith ∷ Ascii → [AsciiBuilder] → AsciiBuilder
-{-# INLINEABLE joinWith #-}
-joinWith sep = flip go (∅)
-    where
-      go ∷ [AsciiBuilder] → AsciiBuilder → AsciiBuilder
-      {-# INLINE go #-}
-      go []     ab = ab
-      go (x:[]) ab = ab ⊕ x
-      go (x:xs) ab = go xs (ab ⊕ A.toAsciiBuilder sep ⊕ x)
+    = case break isSep src of
+        (last , []       ) → [last]
+        (first, _sep:rest) → first : splitBy isSep rest
 
 -- |> quoteStr "abc"
 --  > ==> "\"abc\""
@@ -65,10 +57,12 @@ quoteStr str = A.toAsciiBuilder "\"" ⊕
 
 -- |> parseWWWFormURLEncoded "aaa=bbb&ccc=ddd"
 --  > ==> [("aaa", "bbb"), ("ccc", "ddd")]
-parseWWWFormURLEncoded ∷ String → [(String, String)]
+parseWWWFormURLEncoded ∷ Ascii → [(ByteString, ByteString)]
 parseWWWFormURLEncoded src
-    | null src  = []
-    | otherwise = do pairStr ← splitBy (\ c → c ≡ ';' ∨ c ≡ '&') src
+    -- THINKME: We could gain some performance by using attoparsec
+    -- here.
+    | src ≡ ""  = []
+    | otherwise = do pairStr ← splitBy (\ c → c ≡ ';' ∨ c ≡ '&') (A.toString src)
                      let (key, value) = break (≡ '=') pairStr
                      return ( unescape key
                             , unescape $ case value of
@@ -76,9 +70,29 @@ parseWWWFormURLEncoded src
                                            val       → val
                             )
     where
-      unescape ∷ String → String
-      unescape = unEscapeString ∘ map plusToSpace
+      unescape ∷ String → ByteString
+      unescape = BS.pack ∘ unEscapeString ∘ map plusToSpace
 
       plusToSpace ∷ Char → Char
       plusToSpace '+' = ' '
       plusToSpace c   = c
+
+-- |> splitPathInfo "http://example.com/foo/bar"
+--  > ==> ["foo", "bar"]
+splitPathInfo ∷ URI → [ByteString]
+splitPathInfo uri
+    = let reqPathStr = uriPath uri
+          reqPath    = [unEscapeString x | x ← splitBy (≡ '/') reqPathStr, (¬) (null x)]
+      in
+        map BS.pack reqPath
+
+-- |> show3 5
+--  > ==> "005"
+show3 ∷ Integral n ⇒ n → AsciiBuilder
+{-# INLINEABLE show3 #-}
+show3 = A.unsafeFromBuilder ∘ go
+    where
+      go i | i ≥ 0 ∧ i < 10   = B.fromByteString "00" ⊕ BT.digit    i
+           | i ≥ 0 ∧ i < 100  = B.fromByteString "0"  ⊕ BT.integral i
+           | i ≥ 0 ∧ i < 1000 =                         BT.integral i
+           | otherwise        = error ("show3: the integer i must satisfy 0 <= i < 1000: " ⧺ show i)