GitHub - rack/rack-contrib: Contributed Rack Middleware and UtilitiesThis package includes a variety of add-on components for Rack, a Ruby web server interface: Rack::Access - Limits access based on IP address Rack::Backstage - Returns content of specified file if it exists, which makes it convenient for putting up maintenance pages. Rack::BounceFavicon - Returns a 404 for requests to /favicon.ico Rack::CSSHTTPRequest - Adds CSSHTTPRequest support by encoding respo
