Article ID: 829930 - View products that this article applies to.
For a Microsoft .NET Framework 1.1 version of this article, see 834270
You can configure an HTTP handler to handle all file name extensions that have no mappings. If the handler is configured this way, and you visit a Web site in a virtual directory that contains an application that has no mappings for a specific file name extension, the handler can write a response or redirect your browser as necessary.
However, if you visit a Web site in a virtual directory that contains an application that has no mappings for a specific file name extension, you may receive an "HTTP 404 Error" error message instead.
This problem may occur if you visit a URL for a default file that is located in a subfolder that does not exist in the virtual directory that is mapped to the handler.
The first time that your browser requests the URL, the handler responds as expected. If you try to visit a specific .aspx page in the same non-existent folder, you receive an "HTTP 404 Error" error message. This is also the expected behavior.
However, if you try to request the original URL that the handler responded to, regardless of whether you reload the page, you receive an "HTTP 404 Error" error message for that request instead of the response from the handler that you received on the first visit. The handler will not run again until Microsoft ASP.NET is recycled.
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft .NET Framework 1.0 service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
The English version of this hotfix has the file attributes (or later file attributes) 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.
Date Time Version Size File name --------------------------------------------------------------------------------------------- 16-Oct-2003 19:22 1.0.3705.462 200,704 Aspnet_isapi.dll 16-Oct-2003 19:16 4,169 Aspnet_perf.h 16-Oct-2003 19:22 513,302 Aspnet_perf.ini 16-Oct-2003 19:22 510,714 Aspnet_perf2.ini 16-Oct-2003 19:22 24,576 Aspnet_regiis.exe 16-Oct-2003 19:22 1.0.3705.462 28,672 Aspnet_wp.exe 16-Oct-2003 18:37 1.0.3705.462 69,632 Corperfmonext.dll 17-Jun-2003 22:43 16,597 Installpersistsqlstate.sql 17-Jun-2003 22:43 17,331 Installsqlstate.sql 09-Sep-2003 01:28 17,807 Installsqlstatetemplate.sql 16-Oct-2003 18:35 1.0.3705.462 303,104 Mscorjit.dll 17-Oct-2003 16:58 1.0.3705.462 1,953,792 Mscorlib.dll 16-Oct-2003 18:28 10,284 Mscorlib.ldo 16-Oct-2003 18:36 1.0.3705.462 2,273,280 Mscorsvr.dll 16-Oct-2003 18:36 1.0.3705.462 2,269,184 Mscorwks.dll 16-Oct-2003 19:19 1.0.3705.462 20,480 Perfcounter.dll 23-Aug-2002 03:23 15 Smartnav.htm 30-Jul-2003 01:04 8,728 Smartnav.js 17-Oct-2003 16:57 1.0.3705.462 1,175,552 System.dll 17-Oct-2003 16:57 1.0.3705.462 241,664 System.messaging.dll 17-Oct-2003 16:57 1.0.3705.462 311,296 System.runtime.remoting.dll 17-Oct-2003 16:56 1.0.3705.462 131,072 System.runtime.serialization.formatters.soap.dll 17-Oct-2003 16:58 1.0.3705.462 1,196,032 System.web.dll 17-Oct-2003 16:57 507,904 System.web.services.dll 17-Oct-2003 16:58 1,302,528 System.xml.dll 17-Oct-2003 16:55 1.0.3705.462 32,768 Tlbimp.exe 17-Jun-2003 22:43 1,419 Uninstallpersistsqlstate.sql 09-Sep-2003 01:28 2,119 Uninstallsqlstatetemplate.sql 17-Oct-2003 16:55 65,536 Wsdl.exe
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the terminology that is used to describe Microsoft product updates, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/824684/ )Description of the Standard Terminology That Is Used to Describe Microsoft Software Updates
Steps to reproduce the behavior
Code for HandlerError.cs
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/307985/ )INFO: ASP.NET HTTP modules and HTTP handlers overview
(http://support.microsoft.com/kb/308001/ )How to create an ASP.NET HTTP handler by using Visual C# .NET
(http://support.microsoft.com/kb/307997/ )How to create an ASP.NET HTTP handler by using Visual Basic .NET
Article ID: 829930 - Last Review: October 25, 2005 - Revision: 1.8
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