I am making a web proxy, how to achieve maximum performance of sites?

Question

PHP

I did a full redirect to php, all relative resources are unloaded normally and simple sites work fine, but things like YouTube are already starting to go crazy at the sight of the wrong host (all headers are duplicated and the host and origin are corrected to the address of the original site). But the page with the video does not open, it redirects to the main page ... Does anyone have experience?)

Answer 1

No way, some sites can check the domain with scripts.
You can raise socks5 proxy, or vpn, and throw away http proxy, for example.
(Yes, I have experience, I also once wrote a homemade http proxy with caching and replacing some resources according to the list. It's funny, and it works on a number of sites, but it cannot be a universal solution).

Answer 2

Read about Content Security Policy