Rob Eberhardt

Thursday, February 09, 2006

IE6 HTTP Bug with HTTP_Accept request header

Something I bumped into today: The first time Internet Explorer loads a URL, it sends an "HTTP_Accept" request header with the list of MIME types it accepts, like so: HTTP_ACCEPT = application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*

Any subsequent request of the same URL, though, only sends "*/*": HTTP_ACCEPT = */*

Of course I watched this through an ASP page which wrote out Request.ServerVariables("HTTP_Accept"). I wasn't sure if it was IIS or IE's fault tho, so I checked the raw headers with Fiddler, and it's definitely IE.

What's especially strange is that I can find little or no mention of the problem. Anyone else heard of (or conquered) this?

It rather messes up a page I'm working on...

UPDATE: See here for a bug and workaround demo article I just put together.

tools/tips/hacks | tech issues of the moment

2/9/2006 5:55 PM Eastern Standard Time

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8/23/2006 11:20:05 PM (Eastern Daylight Time, UTC-04:00)

I have found the same problem and only have found notes that <a title="" href="" ><acronym title="Internet Explorer">IE</acronym></a> mishandles HTTP_ACCEPT, but no info on why or how to fix it.
 Did you find anything further since this post. If so, I'd appreciate relaying anything useful. Email below.
 Thanks,
 shekster@dcitel.com

Shekster |Shekster

8/23/2006 11:20:05 PM (Eastern Daylight Time, UTC-04:00)

Thanks Shekster,
 Unfortunately, it sounds like you've seen more than I have. I'd be interested in seeing those notes, and in anything else you find.

Rob |Rob

9/12/2006 11:21:20 PM (Eastern Daylight Time, UTC-04:00)

Unfortunately, this is a limitation in Internet Explorer 5/6/7.

I'd be interested to hear about the problems you're encountering due to this limitation.

Eric Lawrence |ericlawAT NOSPAMmicrosoft dot com

1/3/2008 6:45:25 AM (Eastern Standard Time, UTC-05:00)

I had this problem too but not to often.

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1/4/2008 3:46:06 AM (Eastern Standard Time, UTC-05:00)

I use Internet Explorer for a long time but I haven't had this problem not even once.

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1/15/2008 3:44:13 AM (Eastern Standard Time, UTC-05:00)

At first I liked IE but now I want more.....I think I will use another program from now one.

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1/17/2008 7:03:01 AM (Eastern Standard Time, UTC-05:00)

Until now I had no w problem with IE and I hope I will never have one.