I suspect this is so basic that no one bothered to document it.
I want to write an HTML file from my program, and then load that file into a QWebview object.
Whe
You can use QUrl::fromLocalFile which will construct an URL like this "file:///path/to/file.html"
from an absolute file path.
Google uses SSL, and if you are on Windows you need to manually install OpenSSL and copy its DLLs in Windows system directory, in the bin directory of the Qt installation, or in your final executable folder.
Other platforms should either already have OpenSSL installed or a package manager to install it.