How images are cached, in mojoportal

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4/7/2010 11:14:52 AM
paiman
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How images are cached, in mojoportal

Hi.

as I see all images are cached by default in the browser.

I am just curious how is this done. tried to figure out myself, but couldn't. asking is easier.

does a module or something adds caching headers to images?

4/7/2010 11:30:48 AM
Joe Audette
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Re: How images are cached, in mojoportal

There is nothing in mojoPortal that controls this, it is possible to configure IIS to control expiration of static files, by default I think IIS allows cache of static files and browsers cache them.

Some related links:

http://technet.microsoft.com/en-us/library/cc770661%28WS.10%29.aspx

http://www.hanselman.com/blog/ForcingAnUpdateOfACachedJavaScriptFileInIIS.aspx

http://madskristensen.net/post/Add-expires-header-for-images.aspx

By default, static files are served directly by IIS without any involvement of ASP.NET 

Hope it helps,

Joe

4/7/2010 1:24:43 PM
paiman
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Re: How images are cached, in mojoportal

oh, yes. you are right.

I used to use this method: http://www.codeproject.com/KB/aspnet/CachingImagesInASPNET.aspx

for caching images. but I was just wondering how you did without passing them through asp.net 

well, seems the host has managed to enable static content caching, and it has just confused me for some time.

that technique can be used in the portal, if the host hasn't static content caching enabled.

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