QtWebEngine porting : custom file storage or html archive file

[QbProg]

Hello there,
since it's deprecated, I'd like to port a QtWebKit app to QtWebEngine. Actually I'm using a custom storage for HTML and Image files (imagine it as a local ZIP file containing the web contents), and I'm loading the file on-the-fly using the network access manager and a custom protocol.

How could I reproduce this in QtWebEngine? I don't need to use a custom container, but I would like to store the HTML files in a compact form (like a qrc or zip file), and avoiding to load all or them in memory.

Thanks!
Qb