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By Christopher Greene & Aimee Simone Ever wondered what Rails is doing behind the scenes? What happens to an HTTP request after it leaves your browser? How does Rails process the response? In this beginner talk, Aimee Simone and Christopher Green break down the request/response cycle of a web application, navigating through the magestic internals of Rails. We'll outline the responsibilities of each Rails component, including its MVC framework and RESTful routing concepts. By following the flow from a client HTTP request to a completed server response, you'll gain a better understanding of the anatomy of a Rails application. Help us caption & translate this video! http://amara.org/v/FGa1/
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In the video "How a Request Becomes a Response" presented by Christopher Greene and Aimee Simone at RailsConf 2013, the speakers explore the intricacies of the request/response cycle in a Ruby on Rails application. The focus is to help beginners understand the behind-the-scenes processes that occur from the moment an HTTP request leaves a browser until a response is generated and returned. Key points discussed in the video include: - **Initiation of Request**: The journey begins in the browser where a user enters a URL, such as 'codeschool.com/courses', triggering a GET request. - **Request Components**: Understanding the elements of a request is essential. These include: - Request Path: Specifies the resource being sought (e.g., 'courses'). - Request Verb/Method: Indicates the action (e.g., GET, POST, PUT, DELETE). - Query Data: Additional parameters in the URL (e.g., '?page=2'). - Header Data: Information specifying desired formats and user details. - **Role of Web and App Servers**: Once the request is made, it is handled first by a web server (e.g., Nginx, Apache) and then passed to an application server (e.g., Passenger, Puma) which executes application procedures and initiates Rails. - **Routing in Rails**: The request is routed based on the path and method to the appropriate controller and action (e.g., 'index' action of 'CoursesController'). - **Controller Actions**: Collects data related to the request and prepares it for rendering, which ties into models that fetch the necessary data from the database. - **Rendering Views**: Once the data is collected, it is formatted into a view (e.g., HTML) and sent as part of the response body. - **Response Composition**: The response includes headers that signal the type of response (e.g., 'text/html') and status codes (e.g., 200 for success, 404 for not found). The response body delivers the actual content that the user sees in the browser. The presenters emphasized that by understanding each component from request initiation to response rendering, viewers can better comprehend how Rails applications function, providing them with the necessary vernacular and context to dive deeper into the subject matter. The session concludes with a recap of the entire process, illustrating how seamlessly the various components interact to deliver web applications to users.
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