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[Rakka.git] / Rakka / Utils.hs

diff --git a/Rakka/Utils.hs b/Rakka/Utils.hs
index 693fdf2ebae8b695e7b1c30596c2e81d5bd09c40..15bc6f4043f5a87f149cd09a5147c4cb4cb5be7c 100644 (file)
--- a/Rakka/Utils.hs
+++ b/Rakka/Utils.hs
@@ -6,15 +6,19 @@ module Rakka.Utils
     , deleteIfEmpty
     , chomp
     , guessMIMEType
+    , isSafeChar
+    , mkQueryString
     )
     where
 
+import qualified Codec.Binary.UTF8.String as UTF8
 import           Control.Arrow
 import           Control.Arrow.ArrowList
 import qualified Data.ByteString.Lazy as Lazy (ByteString)
 import qualified Data.ByteString.Lazy.Char8 as L8 hiding (ByteString)
 import           Magic
 import           Network.HTTP.Lucu
+import           Network.URI
 import           System.IO.Unsafe
 
 
@@ -63,3 +67,23 @@ guessMIMEType = read . unsafePerformIO . magicString magic . L8.unpack
               $ do m <- magicOpen [MagicMime]
                    magicLoadDefault m
                    return m
+
+
+isSafeChar :: Char -> Bool
+isSafeChar c
+    | c == '/'            = True
+    | isReserved c        = False
+    | c > ' ' && c <= '~' = True
+    | otherwise           = False
+
+
+mkQueryString :: [(String, String)] -> String
+mkQueryString []            = ""
+mkQueryString ((k, v) : xs) = encode k ++ "=" ++ encode v ++
+                              if xs == [] then
+                                  ""
+                              else
+                                  ';' : mkQueryString(xs)
+    where
+      encode :: String -> String
+      encode = escapeURIString isSafeChar . UTF8.encodeString
\ No newline at end of file