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Rack'em Up!

Rack is Ruby’s answer to Python’s WSGI.

A year and half later, Rails replaced the guts of script/server with a call out to Rack.

Days later, Phusion Passenger™ essentially became mod_rack, though you can still call it mod_rails if you like.

Yesterday, a new micro-framework named Metal has been introduced which allows one to intercept requests, whether it be for performance reasons or simply to call out to another framework.  Sinatra has already been demonstrated, Merb can’t be far behind.

I love it when a plan comes together


Rack’em Up!

Also there’s all kinds of interesting development at the Rack level. or example Rack::Cache [link] which implements HTTP caching semantics in Rack so you can write you app to be cacheable from day one.

Posted by Ian McKellar at

Rack’em Up!

Indeed, it was rack-cache that finally made me ‘get’ why rack was interesting.

I think referring to metal as a micro framework is over stating it, we added it simply to allow people to ‘drop down to the metal’ for those rare cases where you need ‘super fast’ responses.  Things like pollers or status urls.

We’ve completely rejigged our internals to be rack from top to bottom.  Our session store is now handled by middleware, our dispatchers only speak rack, our integration tests use rack also.

Posted by Michael Koziarski at

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