So. I've found this post http://www.qtcentre.org/threads/4626...kAccessManager
And looks like it doesn't work this way in QWebEngine. When I'm trying to load my programm in QWebKit, it shows cached page. But when I'm using QWebEngine, it shows regular chromium's "No internet connection" page. How should I change code in order for it to work in QWebEngine?
Thanks for your help!