28 Jun '17, 5pm

What's Rack

As mentioned earlier, our simple Rack application is a Ruby object (not a class) that responds to call and takes exactly one argument, the environment . The environment must be a true instance of Hash. The app should return an Array of exactly three values: the status code (it must be greater than or equal to 100), the headers (must be a hash), and the body (the body commonly is an Array of Strings, the application instance itself, or a File-like object. The body must respond to method each and must only yield String values.) Let us create our new Proc object. Type:

Full article: http://rubylearning.com/blog/2013/04/02/whats-rack/

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