How does output cache work?

How does output cache work?

Output Caching enables us to cache the content returned by any controller method so that the same content does not need to be generated each time the same controller method is invoked. The main purpose of using Output Caching is to dramatically improve the performance of an ASP.NET MVC Application.

What is controller action?

An action (or action method ) is a method on a controller that handles incoming requests. Controllers provide a logical means of grouping similar actions together, allowing common sets of rules (e.g. routing, caching, authorization) to be applied collectively. Incoming requests are mapped to actions through routing.

How output cache works in MVC?

The output cache enables you to cache the content returned by a controller action. That way, the same content does not need to be generated each and every time the same controller action is invoked. Imagine, for example, that your ASP.NET MVC application displays a list of database records in a view named Index.

What is OutputCache?

In ASP.NET MVC, there is an OutputCache filter attribute that you can apply and this is the same concept as output caching in web forms. The output cache enables you to cache the content returned by a controller action. Output caching basically allows you to store the output of a particular controller in the memory.

Where is output cache stored?

The output cache is located on the Web server where the request was processed. This value corresponds to the Server enumeration value. The output cache can be stored only at the origin server or at the requesting client. Proxy servers are not allowed to cache the response.

When you cache the output Where does it get stored?

Output cache can be stored in the server memory or in a distributed cache storage. When stored in the server memory output cache is cleared on application restart.

What is a controller class in Java?

A controller class is normally a class part of the Model View Controller (MVC) pattern. A controller basically controls the flow of the data. It controls the data flow into model object and updates the view whenever data changes.

What is output cache filter?

OutputCache filter adds an appropriate cache control header in response, which is based upon Location property. Example of OutputCache with VaryByParam attribute. VaryByParam property creates a different cache, which is based upon the parameter value and is passed through Query String or Request.

How do I clear my output cache?

To manually clear the output cache of a page:

1. Open the Pages application.
2. Select the page in the content tree.
3. Open the Properties -> General tab.
4. Click Clear output cache in the Output cache section.

What is vary by Param output cache?

The VaryByParam is a semicolon-delimited set of parameters used to vary the cached output. It allows varying the cached output by GET query string or form POST parameters.

How to enable output caching in a controller?

You enable output caching by adding an [OutputCache] attribute to either an individual controller action or an entire controller class. For example, the controller in Listing 1 exposes an action named Index (). The output of the Index () action is cached for 10 seconds. Listing 1 – Controllers\\HomeController.cs

What does cache control header mean in ASP.NET Core?

Cache control headers merely provide guidance to clients and intermediary proxies when and how to cache responses. There’s no guarantee that clients and proxies will honor the HTTP 1.1 Caching specification. Response Caching Middleware always follows the caching rules laid out by the specification.

What’s the difference between Cache Control and location?

Location.Any ( Cache-Control set to public) indicates that the client or any intermediate proxy may cache the value, including Response Caching Middleware. Location.Client ( Cache-Control set to private) indicates that only the client may cache the value.

How long can I cache the output of a controller?

If you prefer, you can specify a much longer cache duration. For example, if you want to cache the output of a controller action for one day then you can specify a cache duration of 86400 seconds (60 seconds * 60 minutes * 24 hours).