A collection of Rack middleware to support JSON Schema.

JRuby-Rack is a combined Java and Ruby library that adapts the Java Servlet API to Rack. For JRuby only.

Fontue is a Rack-based, open-source, web font server built for Kernest.com. This project also includes font optimization scripts for use with FontForge

Rack-mountable app to use and configure feature flags via the rollout gem

Rodauth is Ruby's most advanced authentication framework, designed to work in all rack applications. It's built using Roda and Sequel, but it can be used as middleware in front of web applications that use other web frameworks and database libraries. Rodauth aims to provide strong security for ...

provides a simple endpoint for your rails app for a heartbeat client to connect to

SpeedTracer middleware for server side debugging

Detect and show a maintenance page

AcornCache is a Ruby HTTP proxy caching library that is lightweight, configurable and can be easily integrated with any Rack-based web application. AcornCache allows you to improve page load times and lighten the load on your server by allowing you to implement an in-memory cache shared by every ...

This is a simple lightweight way to expose work-in-progress functionality to developers, testers or other internal users.

Abort requests that take too long, but don't murder Puma workers in the process.

This middleware acts as a spam trap. It inserts, into every outputted <form>, a text field that a spambot will really want to fill in, but is actually not used by the app. The field is hidden to humans via CSS, and includes a warning label for screenreading software.

Kiev is a logging tool aimed at distributed environments. It logs to JSON, while providing human-readable output in development mode. It integrates nicely with Rails, Sinatra and other Rack-based frameworks, Sidekiq, Que, HTTParty, Her and other Faraday-based HTTP clients.

Generate a static site from any rackup compatible application.

Compose declarative, component-based responses to HTTP requests

Request ID Header

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

Runs a rack conform application inside jetty web server

Upload files securely

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