Rack provides minimal, modular and adaptable interface for developing web
applications in Ruby. By wrapping HTTP requests and responses in the simplest
way possible, it unifies and distills the API for web servers, web frameworks,
and software in between (the so-called middleware) into a single method call.

Authors:
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Christian Neukirchen
Christoffer Sawicki
Tim Fletcher
Luc Heinrich
Armin Ronacher