From 623aed38b54caf9dd4c992142661c98018224761 Mon Sep 17 00:00:00 2001
From: Mael Clerambault <mael@clerambault.fr>
Date: Sun, 27 May 2012 23:17:39 +0200
Subject: [PATCH] Do not add a / to empty path in 'path_traversal'

---
 rack-protection/lib/rack/protection/path_traversal.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rack-protection/lib/rack/protection/path_traversal.rb b/rack-protection/lib/rack/protection/path_traversal.rb
index 8f087ee3..e78c4b2d 100644
--- a/rack-protection/lib/rack/protection/path_traversal.rb
+++ b/rack-protection/lib/rack/protection/path_traversal.rb
@@ -12,7 +12,7 @@ module Rack
     class PathTraversal < Base
       def call(env)
         path_was         = env["PATH_INFO"]
-        env["PATH_INFO"] = cleanup path_was if path_was
+        env["PATH_INFO"] = cleanup path_was if path_was && !path_was.empty?
         app.call env
       ensure
         env["PATH_INFO"] = path_was