Create web app APIs that respond to one or more formats using an elegant DSL.

Compose declarative, component-based responses to HTTP requests

Find yourself missing a `rails console` analogue in your other Ruby web applications? This lightweight gem provides a Rack::Console that will load your Rack application's code and environment into an IRB or Pry session. Either use `Rack::Console.start` directly, or run the provided `rack-console` executable.

A rack middleware for throttling and filtering requests

Rack::Brotli enables Google's Brotli compression on HTTP responses

rack-ecg allows you to serve a page that shows you facts about your deployed app to allow you to check that everything is running as it should: git revision, database migrations, and more

rack-facebook is a Rack middleware that checks the signature of Facebook params, and converts them to Ruby objects when appropiate. Also, it converts the request method from the Facebook POST to the original HTTP method used by the client.

Unicorn family Rack handlers for you. Mostly for `rails s`.

Rack middleware for idempotency guarantees in mutating endpoints.

Rack middleware for enabling problematic web browsers (Internet Explorer and Safari) to use same cookies in iframes as in parent windows.

A Rack JSONP middleware

Easy Link header management for rack responses.

Rack::Robustness provides you with an easy way to handle errors in your stack, for making web applications more robust.

Rack middleware for serving RPC endpoints.

Upload files securely

Rack middleware to automatically include code for Smart App Banner, introduced in iOS 6.

If the user clicked through from an affiliated site, this middleware will track affiliate tag, referring url and time.

Rack-based console inside your web applications, using pry

Rack middleware to force subdomain redirects.

\Rainbows! is an HTTP server for sleepy Rack applications. It is based on unicorn, but designed to handle applications that expect long request/response times and/or slow clients.