Long name conversion on webrick

webrick_long_name.patch

diff --git a/lib/webrick/httpservlet/filehandler.rb b/lib/webrick/httpservlet/filehandler.rb
index 8736f57..e03db0f 100644
--- a/lib/webrick/httpservlet/filehandler.rb
+++ b/lib/webrick/httpservlet/filehandler.rb
@@ -327,12 +327,26 @@ module WEBrick
         end
       end
 
+      if /mswin|mingw/ =~ RUBY_PLATFORM
+        require 'Win32API'
+
+        GetLongPathName = Win32API.new(*%w"kernel32 GetLongPathName SSI I")
+
+        def long_path_name(name)
+          if (len = GetLongPathName.call(name, nil, 0)).nonzero?
+            buf = "\0" * len
+            buf[0...GetLongPathName.call(name, buf, buf.size)]
+          end
+        end
+      end
+
       def shift_path_info(req, res, path_info, base=nil)
         tmp = path_info.shift
         base = base || tmp
         req.path_info = path_info.join
         req.script_name << base
         res.filename = File.expand_path(res.filename + base)
+        res.filename = long_path_name(res.filename) if /mswin|mingw/ =~ RUBY_PLATFORM
         check_filename(req, res, File.basename(res.filename))
       end