We are running a webshop and Google should index it on the normal HTTP pages.
But because there is also a "Facebook app" in front of the same shop, and a fb app requires https, all pages are reachable on HTTPS also.
The question is, if I add a
<link rel="canonical" href="http://example.com/thesame-page"> to all HTTPS pages, will this be ok for Facebook? (This link tag would be needed to avoid google seeing duplicate content iin our shop)
But this is a Facebook app question. Will Facebook just happily ignore it?