Visualforce base URL critical update

[camisotro]

Great code here - you might want to adapt it to detect the new critical update that changes Visualforce and document base URLs. https://releasenotes.docs.salesforce.com/en-us/spring18/release-notes/rn_vf_instance_names_removed.htm

So your query that returns a URL like: https://my-domain-dev-ed--c.na50.content.force.com/profilephoto/001/A

Should after the critical update return: https://my-domain-dev-ed--c.documentforce.com/profilephoto/001/A

And if it does, you'd expect the Visualforce URL to be https://my-domain-dev-ed--c.visualforce.com/

If it doesn't then the org is still on the old URL pattern.