3 files changed, 14 insertions, 4 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/static.rb b/actionpack/lib/action_dispatch/middleware/static.rb
index e66c21ef85..002bf8b11a 100644
--- a/actionpack/lib/action_dispatch/middleware/static.rb
+++ b/actionpack/lib/action_dispatch/middleware/static.rb
@@ -24,9 +24,19 @@ module ActionDispatch
       path = URI.parser.unescape(path)
       return false unless path.valid_encoding?
 
-      paths = [path, "#{path}#{ext}", "#{path}/index#{ext}"]
+      paths = [path, "#{path}#{ext}", "#{path}/index#{ext}"].map { |v|
+        Rack::Utils.clean_path_info v
+      }
 
-      if match = paths.detect {|p| File.file?(File.join(@root, p)) }
+      if match = paths.detect { |p|
+        path = File.join(@root, p)
+        begin
+          File.file?(path) && File.readable?(path)
+        rescue SystemCallError
+          false
+        end
+
+      }
         return ::Rack::Utils.escape(match)
       end
     end
diff --git a/actionpack/lib/action_dispatch/routing/inspector.rb b/actionpack/lib/action_dispatch/routing/inspector.rb
index ea3b2f419d..cfe2237512 100644
--- a/actionpack/lib/action_dispatch/routing/inspector.rb
+++ b/actionpack/lib/action_dispatch/routing/inspector.rb
@@ -48,7 +48,7 @@ module ActionDispatch
       def reqs
         @reqs ||= begin
           reqs = endpoint
-          reqs += " #{constraints.to_s}" unless constraints.empty?
+          reqs += " #{constraints}" unless constraints.empty?
           reqs
         end
       end
diff --git a/actionpack/lib/action_pack/gem_version.rb b/actionpack/lib/action_pack/gem_version.rb
index 6834845d4f..9b3ea30f69 100644
--- a/actionpack/lib/action_pack/gem_version.rb
+++ b/actionpack/lib/action_pack/gem_version.rb
@@ -8,7 +8,7 @@ module ActionPack
     MAJOR = 4
     MINOR = 2
     TINY  = 0
-    PRE   = "beta2"
+    PRE   = "beta4"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end