Today we are proud to release Rack 0.9.
= Rack, a modular Ruby webserver interface
Rack provides a 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.
The exact details of this are described in the Rack specification,
which all Rack applications should conform to.
- January 6th, 2009: Fifth public release 0.9.
- Rack is now managed by the Rack Core Team.
- Rack::Lint is stricter and follows the HTTP RFCs more closely.
- Added ConditionalGet middleware.
- Added ContentLength middleware.
- Added Deflater middleware.
- Added Head middleware.
- Added MethodOverride middleware.
- Rack::Mime now provides popular MIME-types and their extension.
- Mongrel Header now streams.
- Added Thin handler.
- Official support for swiftiplied Mongrel.
- Secure cookies.
- Made HeaderHash case-preserving.
- Many bugfixes and small improvements.
== Where can I get it?
You can download Rack 0.9 at
Alternatively, you can checkout from the development repository with:
git clone git://github.com/rack/rack.git cd rack && git checkout rack-0.9 # for this release
== Supported web servers
The included handlers connect all kinds of web servers to Rack:
These web servers include Rack handlers in their distributions:
- Phusion Passenger (which is mod_rack for Apache)
Any valid Rack app will run the same on all these handlers, without
== Supported web frameworks
The included adapters connect Rack with existing Ruby web frameworks:
These frameworks include Rack adapters in their distributions:
- Ruby on Rails
Current links to these projects can be found at
The plethora of useful middleware created the need for a project that
collects fresh Rack middleware. rack-contrib includes a variety of
add-on components for Rack and it is easy to contribute new modules.
== Installing with RubyGems
A Gem of Rack is available. You can install it with:
gem install rack
I also provide a local mirror of the gems (and development snapshots)
at my site:
gem install rack --source http://chneukirchen.org/releases/gems/
Please mail bugs, suggestions and patches to
Mailing list archives are available at
There is a bug tracker at http://rack.lighthouseapp.com/.
Git repository (patches rebased on master are most welcome):
You are also welcome to join the #rack channel on irc.freenode.net.
The Rack Core Team, consisting of
- Christian N. (chneukirchen)
- James T. (raggi)
- Josh P. (josh)
- Michael F. (manveru)
- Ryan T. (rtomayko)
- Scytrin dai Kinthra (scytrin)
would like to thank:
- Adrian M., for the LiteSpeed handler.
- Christoffer S., for the first Rails adapter and Rack::Deflater.
- Tim F., for the HTTP authentication code.
- Luc H. for the Cookie sessions, the static file handler and
- Armin Ronacher, for the logo and racktools.
- Aredridel, Ben A., Dan K., Daniel Roethlisberger, Matt T., and
Phil H. for bug fixing and other improvements.
- Stephen B., for bug reports and documentation.
- Gary W., for proposing a better Rack::Response interface.
- Jonathan B., for improvements regarding Rack::Response.
- Armin RÃ¶hrl, for tracking down bugs in the Cookie generator.
- Alexander Kellett for testing the Gem and reviewing the announcement
- Marcus RÃ¼ckert, for help with configuring and debugging lighttpd.
- The WSGI team for the well-done and documented work they’ve done and
Rack builds up on.
- All bug reporters and patch contributers not mentioned above.
Copyright © 2007, 2008, 2009 Christian N.
Rack is freely distributable under the terms of an MIT-style license.
Rack’s Rubyforge project:: http://rubyforge.org/projects/rack
Official Rack repositories:: http://github.com/rack
rack-devel mailing list:: http://groups.google.com/group/rack-devel
Happy hacking and have a nice day,
on behalf of the Rack Core Team.