Microsoft KB Archive/811045

= XSL requests in Internet Explorer do not use the client-side cache correctly =

Article ID: 811045

Article Last Modified on 11/15/2007

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APPLIES TO

 Microsoft XML Parser 3.0 Service Pack 3 Microsoft Internet Explorer 6.0 Service Pack 1, when used with:  Microsoft Windows XP Home Edition

 Microsoft Windows XP Professional

 Microsoft Windows XP Media Center Edition 2002

 Microsoft Windows XP Tablet PC Edition</li></ul> </li></ul>

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SYMPTOMS
When Microsoft Internet Explorer retrieves an XML file as the result of a POST request, and that XML file includes an XSL style sheet that is available locally in the cache, the style sheet is not retrieved from the client-side cache. Instead, the style sheet is requested in full from the specified URL.

When Internet Explorer retrieves the XML file as the result of a GET request, this problem does not occur. The XSL file is retrieved from the client-side cache if a valid and current copy of the file is available.

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CAUSE
By design, POST requests do not use the client-side cache because they typically contain form data and receive a dynamic response from the server. In the affected versions of Microsoft XML (MSXML), the subsequent GET request for the XSL file that is included in the XML file also does not check the client-side cache.

The problem does not occur if the outer request for the XML file is a GET request. If the request for the outer XML file is a POST request, the inner request that is generated for an embedded style sheet in the XML file is not retrieved from the cache even if it should be. This request for an embedded resource, or XSL file, is still a GET request, even if the containing resource, or XML file, is requested with a POST request.

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RESOLUTION
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. <pre class="fixed_text">  Date         Time   Version      Size       File name     Platform 20-Nov-2002 22:56  8.20.9816.0  1,208,320  msxml3.dll    i386 20-Nov-2002 22:54  8.20.9816.0     24,064  msxml3a.dll   i386 20-Nov-2002 22:54  8.20.9816.0     43,520  msxml3r.dll   i386

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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

Keywords: kbhotfixserver kbwebbrowser kbmsxml300fix kbperformance kbqfe kbbug KB811045

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