Now that I updated many of my sites to be HTTPS only, redirecting HTTP requests as needed, I did notice that sharing on Facebook produced a blank image. Refreshing the Share Attachment does not change anything, so I looked into t he FB documentation. It says to specify the og:image:secure_urlog:image:secure_url
tag if your site requires an HTTPS connection, so I replaced the simple og:imageog:image
tag with the secure one and the Facebook OpenGraph Debugger says that og:imageog:image
is missing but the site no longer has any unsecureinsecure images.
Must I really set both? And can they both point to exactly the same HTTPS urlURL?