ASP.NET Output caching question: does it cache the contents of System.Net.HttpWebRequest requests

[Ken Fine]

I have a question about ASP.NET output caching.

I want to use screen scraping as a temporary hack to pull in some complex
Classic ASP-rendered content into some ASP.NET pages:

protected String ReadHtmlPage(string url)
{
WebResponse objResponse;
WebRequest objRequest = System.Net.HttpWebRequest.Create(url);
objResponse = objRequest.GetResponse();
StreamReader sr = new StreamReader(objResponse.GetResponseStream());
return sr.ReadToEnd();
}

I am wondering if ASP.NET output caching will also cache what's pulled via
this method (I am hoping so; if not, I don't think this will be sufficiently
performant.)

Thanks,
-KF

 

[George]

Make it as a User Control, mark it as <%@ OutputCache Duration="120"
VaryByParam="None" %>
Then the output of that UserControl will be cached for 120 seconds. And
your code will not be even hit for 120 seconds

George.

 

[Steven Cheng]

Hi KF,

As for the output caching, based on my understanding, it is controlled by
the "OutputCacheModule" httpmodule. You can find it in the machine level
web.config in the framework directory.

Generally, as long as the content (you manually added) are write out into
the page's response stream and the ASP.NET page's request pipeline executed
completely, the output cache will also work. But you need to take care that
you doesn't manually close the request/context or modify any certain http
header that may change the cache behavior(or impact the cache httpmodule's
code logic)

BTW, If you have a large text content(need cache) to present via ASP.NET
page, I think you can also use a dedicated httphander, and in handler you
can programmtically use Cache collection to cache the certain content.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead


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--------------------

From: "Ken Fine" <[email protected]>
Subject: ASP.NET Output caching question: does it cache the contents of

System.Net.HttpWebRequest requests