HTTP/3 ??? ? ?? ??? ?? ????
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? ???? ?? ??? ?? ??? ?? ??? ??? ??? ????? ? HTTP ???? ???? ????, ?? ??? HTTP/3? ?????. HTTP/3? "Hyper Text Transfer Protocol over QUIC"? ??? ???? UDP? ??? HTTP? ??? ?????. HTTP/3? ?? ???? QUIC? ?? ??? ??, ?? ??? HTTP/2?? ?? ??? ??????? ?? ??? ??? ?????. Chrome? ??? ? ?? ?? ???? HTTP/3? ???? ??? ???? ? ??? ? ????.
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HTTP/3 ??? ? ?? ??? ?? ????
- 1. ???(sangjinn@gmail.com) GDG Korea WebTech 2019.11.23 HTTP/3 ??? ? ??? ?? ???? HTTP/3 Faster and Securer
- 2. ??? ???(Optimization) ??? ??(Performance)? ?? ? ?? ??? ??(Condition)? ??? ?.
- 3. ? ??? ? ???? ?? ??? ??? ??? ??? ?? ? ??? ??? ? ????? ??? ? ???? ??? (??? ??..)
- 4. ???/????? ??? ??? ????? -> ??? ?? | ??? ??
- 5. ???(Backend) ??? ? DNS RTT ?? ? DNS ?? ? ???? throughput/bandwidth ? ? ??/WAS CPU/RAM ?? ? ? ?? ??? ?? ? ? ?? ??? ?? ? CDN(Content Delivery Network) ? ???? ???? ? ?????? ??? ? ?????? ?? ? ?? ??? ? ? ?????? ?? ? ¡
- 6. ?????(Frontend) ??? ?? ??? ?? (????, ????, ????, ¡)? ??? ???
- 7. ?????(Frontend) ??? ? ???? ?? (script combination) ? ???? ??? (script minification) ? ???? ?? ?? (gzip Encoding) ? ??? ?? ??? (WebP) ? ??? ?? ?? (compression) ? ???? ?? ?? (cache-control ??) ? DNS ?? ??? <-> Domain Sharding ? DNS ?? ?? ???? (DNS prefetching) ? CSS/JS ?? ?? (Top/Bottom) ? ??? ?? ???? (page prefetching) ? ?? ??(3rd party) ???? ?? ? ¡
- 8. ???? ??? HTTP ¡°? ? web? ??? ????, ??? ??? ? ?? ????¡± Client Server
- 10. HTTP? ?? 1991 1995 1997 2012 2013 2015 2019 HTTP0.9 HTTP1.0 HTTP1.1 SPDY HTTP/2 HTTP/3 QUIC ? TCP -> MPTCP -> UDP -> gQUIC -> QUIC ? HTTP1.1 -> SPDY -> HTTP/2 -> HTTP Over QUIC -> HTTP/3
- 11. ~/Desktop/code ? h2c start --dump -> SETTINGS(0) - ACK {empty} <- SETTINGS(0) - ACK SETTINGS_HEADER_TABLE_SIZE: 4096 SETTINGS_MAX_CONCURRENT_STREAMS: 100 SETTINGS_INITIAL_WINDOW_SIZE: 65535 SETTINGS_MAX_FRAME_SIZE: 16384 SETTINGS_MAX_HEADER_LIST_SIZE: 16384 -> SETTINGS(0) + ACK {empty} <- SETTINGS(0) + ACK {empty} -> HEADERS(1) + END_STREAM + END_HEADERS :method: GET :scheme: https :authority: http2.akamai.com :path: / <- PUSH_PROMISE(1) + END_HEADERS Promised Stream Id: 2 :method: GET :path: /resources/push.css :authority: http2.akamai.com :scheme: https host: http2.akamai.com accept: */* <- HEADERS(1) - END_STREAM + END_HEADERS :status: 200 server: Apache content-type: text/html;charset=UTF-8 etag: "9068c20f1c727825919f58f136cdfb91:1506554442" strict-transport-security: max-age=31536000 ; includeSubDomains access-control-allow-origin: * access-control-allow-methods: GET,HEAD,POST <- DATA(1) - END_STREAM {1522 bytes} <- DATA(1) + END_STREAM {0 bytes} EOF HTTP/2 ????
- 13. Static Table 1 :authority 2 :method GET 3 :path / 4 :scheme https ¡ ¡ ¡ 62 user-agent Mozilla/5.0 (Macintosh; Intel Mac.. ¡ ¡ ¡ Dynamic Table ? ?? ??? / ?? ???? ??? ??? ??? ? ???? ??? ??? Huffman ?????? ?? ? Encoder/Decoder? ??? ??? ?? Client Server ?? ???? ??
- 14. ?? ??(Server Push) ? ?????? ???? ?? ???? ??? ??? ???? ? ????? ? ?? ?, RTT(Round Trip Time) ??
- 15. * CRP(Critical Rendering Path) From: https://developers.google.com/web/fundamentals/performance /critical-rendering-path/analyzing-crp ?? ??(Server Push)
- 16. HTTP1.1 HTTP/2 ?? ??(X) HTTP/2 + ?? ??(O) /index.html style.css logic.js image.jpg 1sec 2sec 3sec 4sec 5sec /index.html style.css logic.js image.jpg /index.html style.css logic.js image.jpg ?? ??(Server Push) ??? ??? HTTP/2 ?????, ?? ??, ¡ ???? ??? ??
- 17. HTTP/2 ??
- 18. ???, ? HTTP/3? ??? HTTP/2 ??, 4? ????
- 19. HTTP/3 ?? ?? HTTP/2? HTTP? HOLB(Head Of Line Blocking)? ??????, TCP? HOLB ??? ??? ?????.
- 21. QUIC (Quick UDP Internet Connections)
- 23. HTTP/3 ???? ?? HTTP/2 TLS 1.2+ TCP HTTP/3 UDP IP TLS 1.3 QUIC -> ??? ?? ??
- 25. HTTP/3 ??? QUIC ??? ??? ?? ? ?? ??? ? ?? ?? ? ?? ?? ? ?? TCP ??.. Reliability Layer
- 26. Static Table 1 :authority 2 :method GET 3 :path / 4 :scheme https ¡ ¡ ¡ 62 user-agent Mozilla/5.0 (Macintosh; Intel Mac.. ¡ ¡ ¡ Dynamic Table ? ?? ????? RFC? ??? ?? ??? ? ?? ???? ?? End Point? ?? ????? ???? ? ?? ???? ??? ??? FIFO ???? ?? Client Server HTTP/3 - QPACK
- 27. Client Server Step 1) date:Wed, 23 Oct 2019 20:13:21 GMT 34 characters, 34 bytes ??? ???? date: ?? ?? Step 2) ..date:.¡zd..2...0....z.sd...... Huffman encoded, 34 bytes -> 29 bytes HTTP/3 - QPACK
- 28. Client Server ? ?? ??? ??? ??? ??, ¡°date:Wed, 23 Oct 2019 20:13:21 GMT¡± Static Table 1 :authority ¡ ¡ ¡ 33 :date ¡ ¡ ¡ 62 date Wed, 23 Oct 2019 20:13:21 GMT ¡ ¡ ¡ Dynamic Table Index 62? 24 bytes -> 1 byte HTTP/3 - QPACK
- 29. Decoder Ecoder Static Table Dynamic TableEncoder Decoder Decoder Ecoder Static Table Dynamic Table DecoderEncoder ??????? ? ???? ???? ?? ??? ????, ?? ?? ? ???? ?? ???, ?? ???? ???? ??? ?? ?? HTTP/3 - QPACK
- 30. HTTP/3 HTTP/3? HTTP/2? TCP HOLB ??? ??? ?? ???. ? HTTP/2? ?? ?? + ? TLS1.3 ? UDP? ?? ?? ? QUIC? ???
- 31. HTTP/3 QUIC HTTP/3 = HTTP/2 + TCP? ?? + QUIC + TLS 1.3 Reliability Layer HTTP/2 TLS 1.3
- 32. HTTP/3 ???
- 33. HTTP/3 ???
- 34. DEMO - HTTP/3 with Chrome -
- 35. HTTP/3 - Chrome
- 36. HTTP/3 - Chrome
- 38. HTTP/3, ??? ? ????.. ?? ?? https://www.facebook.com/ittechtrip/
- 39. - ?????. -