Extending from OutputCache attribute asp.net mvc

Question

Lately, i have been exploring the source code of OutputCache attribute in asp.net mvc-3 with intention to inherit and customize it according to needs of my application. I was expecting that it would include some caching mechanism but i failed to locate the place where it stores result of and actionresult in the cache and retrieves on subsequent requests. Moreover, in implementation of onActionExecuting, onResultExecuting etc. i have seen code like

if(filterContext.ChildRequest or perhaps ChildAction)
{
}

and if current request is not a child action cache attribute seems to be doing nothing. Can someone explain this behavior. Furthermore, where caching is actually performed if not in OutuptCache attribute?

Tz_ · Accepted Answer · 2011-07-25 12:51:11Z

3

Based on the code if it is not a child action it delegates the cache handling back to the standard ASP.NET infrastructure. It happens in the OnResultExecuting, where it checks if it is NOT a child action, and then creates an OutputCachedPage wrapper to execute the request. This wrapper inherits from the System.Web.UI.Page and it initializes the output caching with the InitOutputCache method. This method configures the cache policy for the response (Response.Cache). I think the actual caching happens in the System.Web.Caching.OutputCacheModule (OnEnter, OnExit methods) finally, based on the cache policy previously set on the page.

answered Jul 25, 2011 at 12:51

Tz_

2,95920 silver badges13 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Muhammad Adeel Zahid Over a year ago

where action method parameters are fetched and inspected for change if we have specified VaryByParam property to "id;name"

Tz_ Over a year ago

In the OutputCacheModule this is done by generating a cache item key that depends on the specified "vary" parameters. This key is used to store/look up values in the cache. The cache key is built in the CreateOutputCachedItemKey private method that investigates the query string, form data, etc according to the specified parameters.

nakhli · Accepted Answer · 2011-07-25 12:45:50Z

0

The caching is not performed on the framework level but in the webserver (IIS), intermediate proxies, the final client (browser) cache etc.

The cache location enumeration gives more info on where the data is cached.

answered Jul 25, 2011 at 12:45

nakhli

4,0796 gold badges41 silver badges62 bronze badges

Collectives™ on Stack Overflow

Extending from OutputCache attribute asp.net mvc

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related