[DAS2] Re: New problem with content-type header in DAS/2 server responses!

[Lincoln Stein]

I didn't know that X-DAS-Status had ever been deprecated. I strongly feel that 
the DAS status codes are separate from the HTTP codes and should not try to 
piggyback on the HTTP status line.

Lincoln

On Thursday 10 November 2005 01:33 pm, Ed Erwin wrote:
> Andrew Dalke wrote:
> >> X-DAS-Content-Type: text/x-das-feature+xml
> >> X-DAS-Server: GMOD/0.0
> >> X-DAS-Status: 200
> >> X-DAS-Version: DAS/2.0
> >> ==================
> >>
> >> This also has the added benefit of already being implemented for a few
> >> months.  Are there objections to this solution?
> >
> > Yes.  Several.
> >
> > When did "X-DAS-Status" come back into the picture?  I thought
> > we talked about this in spring and nixed it because it doesn't provide
> > anything useful than the existing HTTP-level error code.  Or perhaps
> > it was fall of last year?  I think I remember raking leaves at the time.
> >
> > More useful, for example, would be a document (html, xml, or otherwise)
> > which accompanies the error response and gives more information about
> > what occurred.
>
> Using the HTTP-level error codes can cause problems.
>
> For a user (let's call her Varla) using IE, the browser will intercept
> some error codes and present her with some IE-specific garbage, throwing
> away any content that was sent back in addition to the error code.
>
> Even for a user (Marla this time) using IGB, firewalls and/or caching
> and/or apache port-forwarding mechanisms can throw out anything with a
> status code in the error range.
>
> (I did test having the NetAffx DAS server send HTTP status codes, and I
> did have problems with that in IGB, though I've forgotten the specifics.
>   It was about a year ago....)
>
> I don't care if status code is indicated with a header like
> "X-DAS-Status: 200" or with some XML content, or with both.  But I think
>   the HTTP status code has to be a separate thing, and will usually be
> "400" indicating that the user (sorry, I meant to say LeRoy)
> successfully communicated with the DAS server.
>
> Ed
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-- 
Lincoln D. Stein
Cold Spring Harbor Laboratory
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