WRRC

1- A user opens his browser, types in a URL, and presses Enter.
2- When a user presses Enter, the browser makes a request for that URL.
3- The request hits the Rails router (config/routes.rb). The router maps the URL to the correct controller and action to handle the request.
4- The action receives the request and passes it on to the view.
5- The view renders the page as HTML.
6- The controller sends the HTML back to the browser. The page loads and the user sees it.

In this way, the request/response cycle is a useful way to see what a Rails app’s files and folders are for and how they fit together.