From: Anders Kaseorg <andersk@mit.edu>
Date: Mon, 12 Jul 2010 03:12:14 +0000 (-0400)
Subject: Support suffix byte range specifiers.
X-Git-Url: http://andersk.mit.edu/gitweb/scripts-static-cat.git/commitdiff_plain/3078266427a7096d2b9f69d3133ca64ace0cd1fa

Support suffix byte range specifiers.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>
---

diff --git a/StaticCat.hs b/StaticCat.hs
index b5d03fc..396403b 100644
--- a/StaticCat.hs
+++ b/StaticCat.hs
@@ -123,6 +123,8 @@ checkIfRange mTime = do
       return $ if parseHTTPDate ir == Just mTime then Just () else Nothing
 
 parseRange :: String -> FileOffset -> Maybe (FileOffset, FileOffset)
+parseRange (splitAt 6 -> ("bytes=", '-':(readDec -> [(len, "")]))) size =
+    Just (max 0 (size - len), size - 1)
 parseRange (splitAt 6 -> ("bytes=", readDec -> [(a, "-")])) size =
     Just (a, size - 1)
 parseRange (splitAt 6 -> ("bytes=", readDec -> [(a, '-':(readDec -> [(b, "")]))])) size =