[mistwang]

I am not that familiar with rack.

For the lobster example comes with the rack package, you need to change the handler from WEBrick to LSWS in protectedlobster.rb

Rack::Handler::LSWS.run pretty_protected_lobster

Then add an external application to LSWS and assign proper script handler and/or context handler.

You can contact Adrian Madrid at our forum, he contribute the LSWS rack handler.