Re: IIS 6.0 400 - Bad Request with an ISAPI DLL

From: BJM (barrymockett_at_hotmail.com)
Date: 10/08/04 

Date: Fri, 08 Oct 2004 17:25:35 GMT

Just a thought

Under web service extensions in the IIS management console

Have you allowed ISAPI extensions. In 2003/IIS6 unknown ISAPI extensions
are redirected to a 404 page in the same way that they were sent by the IIS
lockdown tool in IIS 5/5.1

Barry
"Sofia Katchi" <anonymous@discussions.microsoft.com> wrote in message
news:097c01c4ad53$223fe4c0$a501280a@phx.gbl...
> No, all it tells me is 400 bad request. No details.
>
> Sofia
>
>
> >-----Original Message-----
> >Hmm - anything in the httperr.log file on the webserver?
> >
> >Cheers
> >Ken
> >
> >
> >"Sofia Katchi" <skatchi@accesssciences.com> wrote in
> message
> >news:031501c4acbf$33aeef10$a501280a@phx.gbl...
> >>I have an ISAPI DLL that runs fine under IIS 5 / 5.1.
> >> Recently bumped up to IIS 6 and now I am getting
> >> intermittent 400 "Bad Request" errors. The client
> >> performs web requests through XMLHTTP only. I've tried
> >> to connect with the client on 2000 and 2003 and get the
> >> same problem. After about 5-6 web requests (HTTP GET
> in
> >> all cases) I'll come back with a 400. I assume that
> >> XMLHTTP is sending RFC 2616 compliant HTML (using CRLF
> >> instead of just CR) but I don't know how I can
> determine
> >> this categorically. Either way, if it wasn't sending
> >> good HTML then it should always fail, not fail
> >> intermittently.
> >>
> >> What is happening is the client EXE is caching a number
> >> of tables from the server during the client's start up
> >> process. The HTML requests are coming in rapid
> >> succession from the same client. Again this server
> works
> >> fine on IIS 5 / 5.1 (Win 2000, XP and XP SP2).
> >>
> >> The ISAPI is runing in IIS 5 compatibility mode
> in "Low"
> >> isolation mode (same problem occurs in "Medium" mode).
> >>
> >
> >
> >.
> >

Relevant Pages

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