FIX: IIS 6.0 may send an "HTTP 100 Continue" response in the middle of the response stream when you send a POST request

Symptoms

When you send a POST request to a server that is running Microsoft Internet Information Services (IIS) 6.0, IIS may send an "HTTP 100 Continue" response in the middle of the response stream. IIS sends the "HTTP 100 Continue" response after IIS has sent the “HTTP 200 OK” response.

This problem may generate a Microsoft Windows Internet (WinINet) API error. Additionally, this problem may cause the TCP connection to be reset.

Resolution

Service pack information

To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
889100 How to obtain the latest service pack for Windows Server 2003

Update information

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 Windows Server 2003 service pack that contains this hotfix.

Windows Server 2003, x86-based versions

The following file is available for download from the Microsoft Download Center:
Download Download the WindowsServer2003-KB898708-x86-enu.exe package now.Release Date: June 26, 2006

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Windows Server 2003, Itanium-based versions

The following file is available for download from the Microsoft Download Center:
Download Download the WindowsServer2003-KB898708-ia64-enu.exe package now.Release Date: June 26, 2006

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Windows Server 2003, x64-based versions

The following file is available for download from the Microsoft Download Center:
Download Download the WindowsServer2003-KB898708-x64-enu.exe package now.Release Date: June 26, 2006

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Prerequisites

You must have Microsoft Windows Server 2003 Service Pack 1 installed to apply this update.

Restart requirement

You must restart the computer after you apply this update.

Update replacement information

This update does not replace any other updates.

File information

The English version of this update 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 item in Control Panel.
Windows Server 2003, x86-based versions
   Date         Time   Version        Size     File name
--------------------------------------------------------
29-Apr-2005 22:23 5.2.3790.2433 290,304 Http.sys
05-Mar-2005 01:30 6.1.22.4 371,936 Updspapi.dll
Windows Server 2003, Itanium-based versions
   Date         Time   Version        Size     File name     Platform
------------------------------------------------------------------
29-Apr-2005 12:31 5.2.3790.2433 794,624 Http.sys
29-Apr-2005 12:31 6.1.22.4 639,712 Updspapi.dll IA-64
Windows Server 2003, x64-based versions
   Date         Time   Version        Size     File name
--------------------------------------------------------
29-Apr-2005 12:31 5.2.3790.2433 535,040 Http.sys
29-Apr-2005 12:31 6.1.22.4 462,560 Updspapi.dll

Status

Microsoft has confirmed that this is a problem in Internet Information Services 6.0.
This problem was first corrected in Windows Server 2003 Service Pack 2.

More Information

For more information about IIS status codes, click the following article number to view the article in the Microsoft Knowledge Base:

318380 Description of Microsoft Internet Information Services (IIS) 5.0 and 6.0 status codes

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Properties

Article ID: 898708 - Last Review: Jun 6, 2008 - Revision: 1

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