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Drop NPN support #280
Description
@pgjones suggested in #276 (comment) to stop using NPN to get the HTTP protocol in .get_http_version() on concurrency backends, and switch to ALPN-only.
(Technical notes of mine: NPN (Next Protocol Negociation) is a TLS extension that was added as part of SPDY a Google protocol whose spec eventually got merged into the HTTP/2 standard. Google announced this in 2016 in Hello HTTP/2, good bye SPDY, and ALPN now replaces NPN.)
I did a bit of research, and NPN removal does seem to have been on its way across the interwebs:
- Chrome 51, 2016
- Firefox 53, 2017
- Cloudflare, 2018
- Safari, 2019 (macOS Mojave and iOS 12)
- Hypercorn, 2019 (😄)
Anyone more experienced than me on HTTP protocols negociation got any thoughts on this?
Activity
[-]Remove NPN verification in get_http_version()[/-][+]Drop NPN support[/+]sethmlarson commentedon Aug 27, 2019
You can add macOS to the list as well. The new
Networkmodule only supports ALPN.lovelydinosaur commentedon Aug 27, 2019
Fair enough, that sounds like a nice little improvement.