= i-rack Rack middleware that returns 404 in response to all requests for the resource “/WMD” Somewhere in your Rack configuration (eg. config.ru) add: require 'i-rack' use I::Rack Then hit your application with the appropriate request: > curl -i -H http://localhost:9292/WMD HTTP/1.1 404 Not Found Content-Length: 0 Content-Type: text/plain