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The prior logic was trying to do too many things at once. For all responses, we want to perform two distinct steps: * Merge/normalize the `Cache-Control` values found in HTTP headers and those found in the `@cache_control` hash. * Conditionally set a default `Cache-Control` header value when we have an ETag This change separates these concerns since the merge/normalize step should occur for all responses, but the second should only occur when we have already set an ETag/last modified value. Normally ETag middleware will set a default `Cache-Control`, but only if an existing ETag is not already set. So, in the cases where an ETag is set, we need to set the default `Cache-Control` value ourselves. |
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= Action Pack -- From request to response Action Pack is a framework for handling and responding to web requests. It provides mechanisms for *routing* (mapping request URLs to actions), defining *controllers* that implement actions, and generating responses by rendering *views*, which are templates of various formats. In short, Action Pack provides the view and controller layers in the MVC paradigm. It consists of several modules: * Action Dispatch, which parses information about the web request, handles routing as defined by the user, and does advanced processing related to HTTP such as MIME-type negotiation, decoding parameters in POST, PATCH, or PUT bodies, handling HTTP caching logic, cookies and sessions. * Action Controller, which provides a base controller class that can be subclassed to implement filters and actions to handle requests. The result of an action is typically content generated from views. With the Ruby on Rails framework, users only directly interface with the Action Controller module. Necessary Action Dispatch functionality is activated by default and Action View rendering is implicitly triggered by Action Controller. However, these modules are designed to function on their own and can be used outside of Rails. == Download and installation The latest version of Action Pack can be installed with RubyGems: $ gem install actionpack Source code can be downloaded as part of the Rails project on GitHub * https://github.com/rails/rails/tree/master/actionpack == License Action Pack is released under the MIT license: * https://opensource.org/licenses/MIT == Support API documentation is at * http://api.rubyonrails.org Bug reports can be filed for the Ruby on Rails project here: * https://github.com/rails/rails/issues Feature requests should be discussed on the rails-core mailing list here: * https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core