Pages Do Not Expire as Expected After Web Site Content Change (319384)

The information in this article applies to:

Microsoft Internet Information Services 5.0
Microsoft Internet Information Services version 6.0

This article was previously published under Q319384

SYMPTOMS

If you change content on a Web site, the changes do not appear as expected. Instead, Internet Information Services (IIS) 5.0 and later returns the old content.

CAUSE

This can occur if HTTP compression is enabled on the Web server. Enabling HTTP compression introduces a new metabase key named HcCacheControlHeader. The default value of HcCacheControlHeader is set to max-age=86400 (that is, 86400 seconds). This means that the Web site stays in the cache of the browser for 24 hours.

RESOLUTION

On your server, open a command prompt.
Change to your X:\InetPub\AdminScripts folder, where X is the drive that you specified for your IIS documents.
Run the following command:
CSCRIPT.EXE ADSUTIL.VBS SET W3SVC/Filters/Compression/Parameters/HcCacheControlHeader "max-age=0"
Stop and restart the IISAdmin service.
Restart the WWW service.

WORKAROUND

If the client refreshes the content (for example, by pressing the F5 key), the IIS cache is updated and shows the changed content.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

MORE INFORMATION

Setting the value of Response.Expires to 0 in the relevant ASP page does not resolve the issue.

Modification Type:	Major	Last Reviewed:	6/29/2004
Keywords:	kbprb KB319384