Seems to me we could ignore the referrer if we get a valid same-domain
Origin header.

On Wed, Dec 2, 2015 at 1:29 PM, Flávio Junior <flaviojuve...@gmail.com>
wrote:

> Some browsers already implement the Referrer Policy draft
> <https://w3c.github.io/webappsec-referrer-policy/#referrer-policy-delivery>,
> which gives the developer more control over the referer HTTP header sent by
> the browser. Sometimes is useful to set a more private policy, like *Origin
> When Cross-Origin*, to prevent disclosing sensitive URL info to a
> third-party, like a password reset token for example.
>
> But one can't just set the policy to *Origin When Cross-Origin*, because
> it will break on Safari, since Safari doesn't adhere to newest spec and
> defaults to no-referrer, which breaks form submits on HTTPS because of
> Django strict referrer check. Also, I can't imagine now why, but some
> developer might want to disable referer header altogether, and can easily
> do so by setting policy to *No Referrer*. See the rationale
> <https://code.djangoproject.com/wiki/CsrfProtection#StrictRefererchecking>
> behind strict referrer check and the code
> <https://github.com/django/django/blob/master/django/middleware/csrf.py#L136-L158>
> .
>
> Maybe Django shouldn't do do strict referrer check anymore?
> It's very strange to change a HTML meta tag and break everything. And
> break in staging specifically, because this happens only on secure requests.
>
> If Django still needs
> <https://code.djangoproject.com/ticket/17563#comment:2> the strict
> referrer check, maybe a better error message should be implemented.
>
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