Should the HTTP Method change when following a 303 redirect ?

Hi everyone,

I'm reaching out to you to clarify what behavior is expected regarding a
303 redirect.

I'm currently discussing about this with the cURL team, and we're not
really sure if a user agent SHOULD or MAY change the HTTP method to GET or
HEAD when following a 303 redirect.
You can read the discussion here : https://github.com/curl/curl/issues/5237

Reading RFC7231 at section-6.4.4
<https://tools.ietf.org/html/rfc7231#section-6.4.4>, it states that :

> A user agent can perform a retrieval request targeting that URI (a GET or
HEAD  request if using HTTP)
> [...]
> This status code is applicable to any HTTP method.
But it seems unclear if the user agent SHOULD use a GET method when
following the redirect,  regardless of the current method used, for a 303
redirect, of it should keep the current method used for the request
inducing that redirect.

Could you help us determine what behavior should be followed in such case ?

Thanks !

Best Regards,
Giovanni «Pof Magicfingers» Olivera