Rack health check endpoint.

Pingable is a Rack handler that let an app respond to a path /ping, with pluggable checks.

Pinion is a Rack application that you can use to compile and serve assets (such as Javascript and CSS).

Pistachio provides a simple HTTP long polling middleware for Rack which is backed by the Stash gem

A doorman for your Rack application. Checks if REMOTE_USER matches the subdomain. Requires some authentication means to set REMOTE_USER.

Minimal server for Rack apps based in EventMachine and http-parser

A middleware to automatically set the base URI for [X]HTML documents. This is useful when you want to mount a web application on a subdirectory, e.g. http://example.org/myapp/

Pup is a rack based ruby web framework for developing web applications with ease

Pubsubstub can be added to a rack Application or deployed standalone. It uses Redis to do the Pub/Sub

Rack middleware that writes the serial number of issued certs to a Redis database. Uses r509 and r509-ca-http

An early hints Ruby / Rack middleware which just sets Link headers (i.e. for nginx http2_push_preload)

This is a simple reverse proxy for Rack. It is not meant for production systems (although it may work), as the webserver fronting your app is generally much better at this sort of thing.

Sinatra札幌の2013年～2014年の活動を振り返ると、いろいろなものとSinatraを組み合わせたものがほとんどでした。そこで、Ruby/GTK2（GTK+）、Gosu（SDL）、Sinatra（Rack）を例として、GUIアプリケーション、ゲーム、Webアプリケーションを対比させてみたいと思います。

Rack Middleware transposing the authenticated identifier for Soar SC

Test S3 integration locally. Originally created by Curtis Spencer, modified by Mario Visic at Envato.

Rack Server API

A rack middleware to dump request and response, and replayer of recorded requests

Rack and Faraday middleware to temporarily disable connections to external dependencies

A lightweight concern that allows IP address restrictions on specific controller actions. Unlike Rack middleware solutions, this operates at the controller level for minimal overhead.

A toolkit for building REST APIs on top of Rack