Use ASCII-8BIT paths in ActionDispatch::Static

The rack gem returns PATH_INFO as an ASCII-8BIT encoded string but it
was being converted to US-ASCII by the match? method because it was
calling Rack::Utils.escape_path. To prevent incompatibile encoding
warnings use ASCII-8BIT strings for the root path and let Ruby handle
any filename encoding conversion.

Fixes #32294, Closes #32314.

1 files changed, 3 insertions, 3 deletions

diff --git a/actionpack/lib/action_dispatch/middleware/static.rb b/actionpack/lib/action_dispatch/middleware/static.rb
index 23492e14eb..acd999444a 100644
--- a/actionpack/lib/action_dispatch/middleware/static.rb
+++ b/actionpack/lib/action_dispatch/middleware/static.rb
@@ -16,7 +16,7 @@ module ActionDispatch
   # does not exist, a 404 "File not Found" response will be returned.
   class FileHandler
     def initialize(root, index: "index", headers: {})
-      @root          = root.chomp("/")
+      @root          = root.chomp("/").b
       @file_server   = ::Rack::File.new(@root, headers)
       @index         = index
     end
@@ -35,7 +35,7 @@ module ActionDispatch
       paths = [path, "#{path}#{ext}", "#{path}/#{@index}#{ext}"]
 
       if match = paths.detect { |p|
-        path = File.join(@root, p.dup.force_encoding(Encoding::UTF_8))
+        path = File.join(@root, p.b)
         begin
           File.file?(path) && File.readable?(path)
         rescue SystemCallError
@@ -43,7 +43,7 @@ module ActionDispatch
         end
 
       }
-        return ::Rack::Utils.escape_path(match)
+        return ::Rack::Utils.escape_path(match).b
       end
     end