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Preflight and HTTPS problem
Any thoughts on this issue? I see posts that Safari might be ignoring the Cache-Control headers when there is a Vary header present and doing the OPTIONS PREFLIGHT request. Especially for an image content-type.
Is that possible? Firefox and Chrome do not have the issue. They do not do the OPTIONS PREFLIGHT on this response, they keep doing the GET request for this image.
Is there some other parameter Safari needs to prevent it from doing the PREFLIGHT for a no-cache image?
Redirect Response
302
Pragma: no-cache
Expires: 0
Cache-Control: no-cache, no-store, must-revalidate
Vary: Accept-Encoding
Content-Type: image/png