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Subject: Re: [xri] FW: [xrds-simple] X-XRDS-Location and redirects

It should be consistent with openID 2.0 discovery.  Follow ALL redirects first.  Then retrieve the header or XRDS.

The product of the second normalization or claimed identifier is the URL after following ALL  redirects.

There are some practical CURL library issues that make this the easer case to program for most things.

On 2-Apr-08, at 11:18 PM, Drummond Reed wrote:
This question was just asked on the XRDS-Simple list, and it was good enough
I though it needed scrutiny here as well.


-----Original Message-----
From: xrds-simple@googlegroups.com [mailto:xrds-simple@googlegroups.com] On
Behalf Of Manger, James H
Sent: Wednesday, April 02, 2008 10:46 PM
To: xrds-simple@googlegroups.com
Subject: [xrds-simple] X-XRDS-Location and redirects

Q. Do HTTP redirects or an X-XRDS-Location header take precedence?

Phrased differently, what should a client do after the following discovery
request & response?

->  GET /some/resource HTTP/1.1
   Host: example.org
   Accept: application/xrds+xml

<-  303 See Other
   X-XRDS-Location: http://example.org/some/resource.xrds
   Location: http://example.org/some/resource.html

Option 1: follow X-XRDS-Location

->  GET /some/resource.xrds HTTP/1.1

Option 2: follow HTTP redirect

->  GET /some/resource.html HTTP/1.1

I don't think the specs (XRDS or XRDS-Simple) indicates which
option is right, or whether the client is free to choose.

I prefer option 1 -- probably as allowed client behaviour, or perhaps
as required behaviour.

Whatever the choice, it would be good to explicitly state it in the spec.

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