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Re: [OAUTH-WG] Returning HTTP 200 on Error for JSONP

Brian Eaton <beaton@google.com> Wed, 18 August 2010 15:55 UTC

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Date: Wed, 18 Aug 2010 08:55:46 -0700
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From: Brian Eaton <beaton@google.com>
To: Mark Nottingham <mnot@mnot.net>
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Cc: OAuth WG <oauth@ietf.org>
Subject: Re: [OAUTH-WG] Returning HTTP 200 on Error for JSONP
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On Tue, Aug 17, 2010 at 11:36 PM, Mark Nottingham <mnot@mnot.net> wrote:
>> The other reason people get funny with these status codes has to do
>> with browser behavior.  Sometimes browsers react in funny ways to
>> funny HTTP status codes.  To be on the safe side, developers tend to
>> return an HTTP 200 with whatever they want the user to see.
>
> Can you give concrete examples, please? What browsers do what exactly, under what circumstances?

Here's a well-known example:
http://malektips.com/internet-explorer-8-disable-friendly-error-messages.html.

Fuzzier stuff is in handling of things like WWW-Authenticate headers
on HTTP 200 responses, or 401s with unknown authorization challenges.

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