[SahAssar]

IIRC WebSockets has basically nothing to do with the way http2 is handled, and websockets are still going over a simple HTTP1.1 Connect/Upgrade. What is the connection between websockets and http2?

[wmf]

Early version of WebSockets exposed bugs in HTTP proxies, some of which were security problems: http://www.adambarth.com/papers/2011/huang-chen-barth-rescor... To fix these kinds of problems, the final version of WebSockets does not use a straightforward upgrade but instead has a kludgey handshake and content masking: https://en.wikipedia.org/wiki/WebSocket#Protocol_handshake https://trac.ietf.org/trac/hybi/wiki/FAQ

HTTP/2 doesn't have the same problems because it requires TLS+ALPN, but IIRC that "clean" solution was only arrived at after years of discussion and experimentation.