[Gen-art] where do error codes go?, was: [OAUTH-WG] Gen-ART Telechat review of draft-ietf-oauth-v2-bearer-18.txt

[Julian Reschke <[e-mail]>]

On 2012-04-10 16:03, Alexey Melnikov wrote:
> ...
> 2). Section "3.1. Error Codes"
>
> I've suggested to use an IANA registry for this field. Apparently there
> is already a registry created by
> <http://tools.ietf.org/html/draft-ietf-oauth-v2-23#section-11.4>.
> However this document doesn't register values defined in section 3.1
> with IANA and doesn't point to draft-ietf-oauth-v2-23 for the registry.
> I find this to be very confusing.
> ...

Speaking of which, how is an error code returned if the HTTP status is 
*not* 401?

3.1. Error Codes


    When a request fails, the resource server responds using the
    appropriate HTTP status code (typically, 400, 401, 403, or 405), and
    includes one of the following error codes in the response:

    invalid_request
          The request is missing a required parameter, includes an
          unsupported parameter or parameter value, repeats the same
          parameter, uses more than one method for including an access
          token, or is otherwise malformed.  The resource server SHOULD
          respond with the HTTP 400 (Bad Request) status code.

    ...

Is the assumption that the response body is always application/json in 
that case? It might be good to clarify that.

Best regards, Julian