Is there a way to specify a default WOPI host for Office Online Server (local installation, not cloud), so that the domain part in WOPISrc param can be omitted?
I am building a host page that uses an iframe to display the Online Office editor, and it bugs me that WOPI host information is exposed as the WOPISrc param of the iframe source URL.
No, there is no way to do that. From this perspective, OOS works in a kinda stateless fashion.
And even if there was a way, the URL couldn't be truly protected...obscured perhaps, but not protected.