Microsoft KB Archive/231609

= Requesting ASP File May Cause 404 Error When ISAPI Filter Uses SF_NOTIFY_URL_MAP =

Article ID: 231609

Article Last Modified on 10/6/2005

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APPLIES TO


 * Microsoft Internet Information Server 4.0

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This article was previously published under Q231609



SYMPTOMS
HTTP 404 "File not found" errors may occur on valid Active Server Pages (ASP) when the same ASP page is requested with an ending forward slash. For example, if a user requests "http://server/default.asp/" and this results in a 404 error, the next request to "http://server/default.asp," will also result in a 404 error.



CAUSE
This only occurs on servers that have an ISAPI filter that requests SF_NOTIFY_URL_MAP. Internet Information Server (IIS) treats all requests terminated by a slash as a directory. When this value is stored in the ASP cache, requests to the actual page fail because only the value up to the final slash is compared when looking up a value in the cache.



WORKAROUND
There is a time factor involved in the cache. If you wait long enough, the item will be flushed from the cache and you will not receive the 404 error. If you use the Microsoft Management Console to connect to the server and then view the properties, the cache will be cleared as well. You can also start and stop the IISAdmin service.



RESOLUTION
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows NT service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:

  Date      Time                 Size    File name     Platform - 05/06/99  18:51                 28,224 Admwprox.dll    (X86) 05/06/99 18:53                214,032 Adsiis.dll  (X86) 05/06/99 18:53                328,512 Asp.dll     (X86) 05/06/99 18:51                 43,456 Coadmin.dll     (X86) 05/06/99 18:53                 11,168 Ftpctrs2.dll    (X86) 05/06/99 18:53                 81,888 Ftpsvc2.dll     (X86) 05/06/99 18:52                 55,392 Httpodbc.dll    (X86) 04/22/99 19:19                  4,687 Iiadmhd.asp     (X86) 05/06/99 18:53                 98,400 Iischema.dll    (X86) 05/06/99 18:51                 10,224 Iisfecnv.dll    (X86) 05/06/99 18:51                 62,960 Iislog.dll  (X86) 05/06/99 18:51                 16,848 Infoadmn.dll    (X86) 05/06/99 18:51                184,720 Infocomm.dll    (X86) 05/06/99 18:51                  9,584 Infoctrs.dll    (X86) 05/06/99 18:51                 47,936 Isatq.dll   (X86) 05/06/99 18:51                 29,520 Iscomlog.dll    (X86) 05/06/99 18:52                 11,248 Iwrps.dll   (X86) 05/06/99 18:51                 13,856 Lonsint.dll     (X86) 05/06/99 18:51                  8,336 Lonsiw95.dll    (X86) 05/06/99 18:51                 53,968 Mdutil.exe  (X86) 05/06/99 18:51                 71,232 Metadata.dll    (X86) 05/06/99 18:51                  7,488 Rpcref.dll  (X86) 05/06/99 18:52                 12,592 Spud.sys    (X86) 05/06/99 18:52                 18,032 Svcext.dll  (X86) 05/04/99 20:49                  2,459 Template.asp    (X86) 04/20/99 19:06                  1,473 Urlform.asp     (X86) 05/06/99 18:52                 14,752 W3ctrs.dll  (X86) 05/06/99 18:54                 71,248 W3key.dll   (X86) 05/06/99 18:52                227,936 W3svc.dll   (X86) 05/06/99 18:52                 87,504 Wam.dll     (X86)

05/06/99 18:51                 50,448 Admwprox.dll   (Alpha) 05/06/99 18:53                307,472 Adsiis.dll (Alpha) 05/06/99 18:53                549,136 Asp.dll    (Alpha) 05/06/99 18:51                 77,072 Coadmin.dll    (Alpha) 05/06/99 18:53                 17,168 Ftpctrs2.dll   (Alpha) 05/06/99 18:52                126,736 Ftpsvc2.dll    (Alpha) 05/06/99 18:52                 89,360 Httpodbc.dll   (Alpha) 04/22/99 19:19                  4,687 Iiadmhd.asp    (Alpha) 05/06/99 18:53                106,768 Iischema.dll   (Alpha) 05/06/99 18:51                 17,680 Iisfecnv.dll   (Alpha) 05/06/99 18:51                112,400 Iislog.dll (Alpha) 05/06/99 18:51                 25,872 Infoadmn.dll   (Alpha) 05/06/99 18:51                303,376 Infocomm.dll   (Alpha) 05/06/99 18:51                 15,120 Infoctrs.dll   (Alpha) 05/06/99 18:51                 82,704 Isatq.dll  (Alpha) 05/06/99 18:51                 45,840 Iscomlog.dll   (Alpha) 05/06/99 18:52                 16,656 Iwrps.dll  (Alpha) 05/06/99 18:51                 23,312 Lonsint.dll    (Alpha) 05/06/99 18:51                 13,584 Lonsiw95.dll   (Alpha) 05/06/99 18:51                 85,776 Mdutil.exe (Alpha) 05/06/99 18:51                131,856 Metadata.dll   (Alpha) 05/06/99 18:51                 12,048 Rpcref.dll (Alpha) 05/06/99 18:52                 20,912 Spud.sys   (Alpha) 05/06/99 18:52                 29,456 Svcext.dll (Alpha) 05/04/99 20:49                  2,459 Template.asp   (Alpha) 04/20/99 19:06                  1,473 Urlform.asp    (Alpha) 05/06/99 18:52                 21,264 W3ctrs.dll (Alpha) 05/06/99 18:54                122,128 W3key.dll  (Alpha) 05/06/99 18:52                381,712 W3svc.dll  (Alpha) 05/06/99 18:52                149,264 Wam.dll    (Alpha)



STATUS
Microsoft has confirmed that this is a problem in Internet Information Server 4.0.

Keywords: kbbug kbfix kbqfe kbhotfixserver KB231609

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