Tell me how to get the FULL text of the loaded page, as in a browser. Via socket with ++

I am writing in Qt / c ++, I want to write a bot for Twitch, which collects statistics from any channel. For example, I need fields number of viewers, number of subscribers and others. They are loaded in Google Chrome after the page loads. I made a curl request on the command line, there is no data there. I think I need to dig in the direction of QtWeb *, but where exactly is not clear to me. Please tell me some class in Qt that implements it or how to implement it. It is also obligatory to use a proxy for a socket connected to a twitch.