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IIS 6.0 not sending Expired header though I have turned it on

Answer 1

A:

IIS 6 will only add this header to static content, e.g. anything not mapped to the asp.net handler (css, js, images, etc). Are you not seeing the header at all, or just not seeing it on your asp.net dynamic content/pages?

Nick Craver 2010-01-30 11:26:43

Hey Nick thanks, i checked it out. Yslow shows that I have expires header with every request besides the js files that are fetched from google and addthis.but when i use wfetch, it shows no expires header

Umair 2010-01-30 11:37:25

@Umair - If you can, use firebug when possible, then you can see the actual list of headers for each request very easily with the net panel. It's free and invaluable :) http://getfirebug.com/

Nick Craver 2010-01-30 11:53:32

@Nick - firebug also doesnt show any expires header with any of my stuff

Umair 2010-02-02 06:23:41

Answer 2

+1 A:

When using "Expire After" option in IIS 6.0; IIS 6.0 doesn't send the "Expires" header, it instead sends the "Cache-Control" header to mark cache duration of static content on the client side.

If content should expire after 12 hours(12 hours * 3600 seconds = 43200 seconds), the following response header will be sent back.

HTTP/1.1 200 OK
...
Cache-Control: max-age=43200
...

IIS 6.0 will use the "Expires" Header if you set the exact date on which contents should expire.

Leyu 2010-04-28 13:42:27

where shall I use these lines? as there is .htaccess for asp.net applications

Umair 2010-05-01 21:55:11

@Umair the fragment above is HTTP response which the web server sends for a request.

Leyu 2010-05-03 06:48:42

well with PHP I can add a cache control header within the .htaccess file, I want to know how to do this with ASP.net + IIS 6.0.

Umair 2010-05-03 07:57:11

@Umair for static resources you can use the IIS 6.0 ContentExpiration settings to enable caching.For full control over caching use ASP.NET Caching Features; using HttpResponse.Cache property the HttpCachePolicy class can be manipulated to add caching features. See http://msdn.microsoft.com/en-us/library/xsbfdd8c%28VS.71%29.aspx for details.

Leyu 2010-05-03 09:04:26

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IIS 6.0 not sending Expired header though I have turned it on

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