Progress of HTTP/2 implementation for ATS and future work

Progress of HTTP/2 impl and future work Yahoo Japan Corporation Ryo Okubo

Agenda • The story of HTTP/2 impl and progress • Future work • How to backpost to an origin server • Discussion

The story of HTTP/2 impl • TS-2729 • Initial patch used nghttp2 (obsoleted) • Current patch doesn’t depends on this (WIP)

Progress • Opening/closing HTTP/2 sessions – Already merged • Handling HTTP/2 requests and responses – Implemented as prototype

Y! Japan web page with HTTP/2 // Above screenshot was taken in experimental environment

How to use current patches • Get and apply a patch attached on TS-2729 – h2_prototype.patch • Build ATS as usual • Enable https • Access the ATS with HTTP/2 client – nghttp, Chrome Canary, Firefox Nightly

Demo

Future work • Rethinking how to handle backposting • Debugging, refactoring and testing • Implementing rest of essential features

How to backpost with HTTP/1.1? • Use FetchSM? • Use HttpSM directly? • I’d like to use FetchSM at first – Redesign and migrate to HttpSM in future

FetchSM • SPDY code uses it • Simple and easy solution • But, it has a little overhead – e.g. memcpy()

HttpSM • It can reduce overhead • But, HttpSM needs some modification – Redesign? – Or add interfaces for backposting?

Discussion points • How to backpost – FetchSM, HttpSM, etc • Release schedule • Another topics

End of Slides • Please give me advices if any – IRC nickname: rokubo (rokubo_)