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Q238210: HTTP Keep Alive Header Sent Whenever ASP Buffering is Enabled

Article: Q238210
Product(s): Internet Information Server
Version(s): winnt:4.0,5.0
Operating System(s): 
Keyword(s): 
Last Modified: 04-FEB-2000

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The information in this article applies to:

- Microsoft Internet Information Server 4.0 
- Microsoft Internet Information Services version 5.0 
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SYMPTOMS
========

Whenever ASP Buffering is enabled, either through the Microsoft Management
Console (MMC) or programmatically in the Active Server Pages (ASP) page
(response.buffer=true), an HTTP Keep-Alive header will be sent along with the
Content-Length.

CAUSE
=====

This is by design.

WORKAROUND
==========

The header can be disabled by adding the following code to the top of the ASP
pages:

  <%response.flush%>

MORE INFORMATION
================

This behavior occurs even if Keep-Alives are disabled in the MMC. The Keep-Alive
will be ignored by HTTP 1.0 (browser) clients. HTTP 1.0 Proxies will require the
Content-Length header to also be present. This is transmitted by default but
could be modified by an Internet server application programming interface
(ISAPI) filter. If a filter is used and the Content-Length is not sent, then you
will have to implement the workaround described above.

Additional query words: Keep-Alive, IIS, Header, ISAPI, Content-Length, keep alive, content length

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Keywords          :  
Technology        : kbiisSearch kbiis500 kbiis400
Version           : winnt:4.0,5.0
Issue type        : kbprb
Solution Type     : kbpending

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