{"id":52244,"date":"2019-11-04T00:00:00","date_gmt":"2019-11-03T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/v-nochnyh-sborkah-firefox-poyavilas-podderzhka-http-3"},"modified":"2020-02-18T13:59:55","modified_gmt":"2020-02-18T10:59:55","slug":"v-nochnyh-sborkah-firefox-poyavilas-podderzhka-http-3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/v-nochnyh-sborkah-firefox-poyavilas-podderzhka-http-3","title":{"rendered":"Ve no\u010dn\u00edch verz\u00edch Firefoxu byla p\u0159id\u00e1na podpora HTTP\/3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>V <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mozilla.org\/en-US\/firefox\/channel\/desktop\/#nightly\">no\u010dn\u00ed sestaven\u00ed<\/a><\/noindex>  Firefox, kter\u00fd bude z\u00e1kladem pro vyd\u00e1n\u00ed Firefox 72, napl\u00e1novan\u00e9 na 7. ledna, <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1581637\">byla p\u0159id\u00e1na<\/a><\/noindex> podpora protokolu HTTP\/3. Ve v\u00fdchoz\u00edm nastaven\u00ed je HTTP\/3 deaktivov\u00e1n a vy\u017eaduje aktivaci mo\u017enosti &#171;network.http.http3.enabled&#187; v about:config. <\/p>\n<p>Podpora HTTP\/3 ve Firefoxu je zalo\u017eena na projektu vyv\u00edjen\u00e9m spole\u010dnost\u00ed Mozilla <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/mozilla\/neqo\">neqo<\/a><\/noindex>, kter\u00fd poskytuje implementaci klienta a serveru pro protokol QUIC. K\u00f3d komponent pro podporu HTTP\/3 a QUIC je naps\u00e1n v jazyce Rust.<br \/>\nZ klientsk\u00e9ho softwaru m\u00e1 experiment\u00e1ln\u00ed podporu HTTP\/3 tak\u00e9  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51526\">byla p\u0159id\u00e1na<\/a><\/noindex> v Chrome a curl, a pro servery je k dispozici ve form\u011b  <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/cloudflare\/quiche\/tree\/master\/extras\/nginx\">modulu<\/a><\/noindex> pro nginx a <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/cloudflare\/quiche\/blob\/master\/examples\/http3-server.rs\">testovac\u00edho serveru<\/a><\/noindex> na z\u00e1klad\u011b knihovny <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/cloudflare\/quiche\">quiche<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50061\">implementace<\/a><\/noindex>  QUIC a HTTP\/3 v jazyce Rust od spole\u010dnosti Cloudflare). Pro ov\u011b\u0159en\u00ed funk\u010dnosti klient\u016f HTTP\/3 <noindex><a rel=\"nofollow\" href=\"https:\/\/bagder.github.io\/HTTP3-test\/\">bylo spu\u0161t\u011bno<\/a><\/noindex> n\u011bkolik testovac\u00edch web\u016f, z nich\u017e v\u011bt\u0161ina se zat\u00edm v Firefoxu spr\u00e1vn\u011b neotev\u00edr\u00e1 (HTTP\/3 je na stupni <noindex><a rel=\"nofollow\" href=\"https:\/\/datatracker.ietf.org\/doc\/draft-ietf-quic-http\/\">n\u00e1vrhu<\/a><\/noindex> a nen\u00ed kone\u010dn\u011b standardizov\u00e1n).<\/p>\n<p>P\u0159ipom\u00edn\u00e1me, \u017ee HTTP\/3 standardizuje pou\u017eit\u00ed protokolu QUIC jako transportu pro HTTP\/2. Protokol <noindex><a rel=\"nofollow\" href=\"https:\/\/www.chromium.org\/quic\/\">QUIC<\/a><\/noindex> (Quick UDP Internet Connections) se od roku 2013 vyv\u00edj\u00ed spole\u010dnost\u00ed Google jako alternativa k kombinaci TCP+TLS pro web, \u0159e\u0161\u00edc\u00ed probl\u00e9my s dlouh\u00fdm \u010dasem na nastaven\u00ed a vyjedn\u00e1v\u00e1n\u00ed spojen\u00ed v TCP a odstran\u011bn\u00ed zpo\u017ed\u011bn\u00ed p\u0159i ztr\u00e1t\u011b paket\u016f b\u011bhem p\u0159enosu dat. QUIC je nadstavbou nad protokolem UDP, podporuj\u00edc\u00ed multiplexov\u00e1n\u00ed n\u011bkolika spojen\u00ed a poskytuj\u00edc\u00ed metody \u0161ifrov\u00e1n\u00ed, ekvivalentn\u00ed TLS\/SSL. <\/p>\n<p>Hlavn\u00ed <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.google.com\/document\/d\/1lmL9EF6qKrk7gbazY8bIdvq3Pno2Xj_l_YShP40GLQE\/preview?sle=true#\">vlastnosti<\/a><\/noindex> QUIC:\n<\/p>\n<ul>\n<li class=\"l\"> Vysok\u00e1 bezpe\u010dnost, srovnateln\u00e1 s TLS (v podstat\u011b QUIC poskytuje mo\u017enost pou\u017eit\u00ed TLS nad UDP);\n<\/li>\n<li class=\"l\"> Kontrola integrity toku, kter\u00e1 zabra\u0148uje ztr\u00e1t\u011b paket\u016f;\n<\/li>\n<li class=\"l\"> Mo\u017enost okam\u017eit\u00e9ho nav\u00e1z\u00e1n\u00ed spojen\u00ed (0-RTT, v p\u0159ibli\u017en\u011b 75% p\u0159\u00edpad\u016f lze data p\u0159en\u00e1\u0161et ihned po odesl\u00e1n\u00ed prvn\u00edho paketu) a zaji\u0161t\u011bn\u00ed minim\u00e1ln\u00edch zpo\u017ed\u011bn\u00ed mezi odesl\u00e1n\u00edm po\u017eadavku a obdr\u017een\u00edm odpov\u011bdi (RTT, doba zp\u011btn\u00e9 cesty);\n<\/li>\n<li class=\"l\"> Nepou\u017eit\u00ed stejn\u00e9ho \u010d\u00edsla sekvence p\u0159i op\u011btovn\u00e9m odesl\u00e1n\u00ed paketu, co\u017e eliminuje nejednozna\u010dnost p\u0159i ur\u010dov\u00e1n\u00ed p\u0159ijat\u00fdch paket\u016f a zbavuje se \u010dasov\u00fdch limit\u016f;\n<\/li>\n<li class=\"l\"> Ztr\u00e1ta paketu ovliv\u0148uje doru\u010den\u00ed pouze souvisej\u00edc\u00edho toku a nezastavuje doru\u010den\u00ed dat v paraleln\u011b p\u0159en\u00e1\u0161en\u00fdch toc\u00edch p\u0159es aktu\u00e1ln\u00ed spojen\u00ed;\n<\/li>\n<li class=\"l\"> N\u00e1stroje pro opravu chyb, kter\u00e9 minimalizuj\u00ed zpo\u017ed\u011bn\u00ed zp\u016fsoben\u00e9 op\u011btovn\u00fdm p\u0159enosem ztracen\u00fdch paket\u016f. Vyu\u017eit\u00ed speci\u00e1ln\u00edch chybov\u00fdch k\u00f3d\u016f na \u00farovni paket\u016f pro sn\u00ed\u017een\u00ed situac\u00ed, kter\u00e9 vy\u017eaduj\u00ed op\u011btovn\u00fd p\u0159enos dat ztracen\u00e9ho paketu.\n<\/li>\n<li class=\"l\"> Hranice kryptografick\u00fdch blok\u016f jsou slad\u011bny s hranicemi paket\u016f QUIC, co\u017e sni\u017euje dopad ztr\u00e1ty paket\u016f na dek\u00f3dov\u00e1n\u00ed obsahu n\u00e1sleduj\u00edc\u00edch paket\u016f;\n<\/li>\n<li class=\"l\"> \u017d\u00e1dn\u00e9 probl\u00e9my s blokov\u00e1n\u00edm front TCP;\n<\/li>\n<li class=\"l\"> Podpora identifik\u00e1toru spojen\u00ed, kter\u00e1 sni\u017euje \u010das pot\u0159ebn\u00fd k op\u011btovn\u00e9mu nav\u00e1z\u00e1n\u00ed spojen\u00ed pro mobiln\u00ed klienty;\n<\/li>\n<li class=\"l\"> Mo\u017enost p\u0159ipojen\u00ed roz\u0161\u00ed\u0159en\u00fdch mechanism\u016f \u0159\u00edzen\u00ed p\u0159et\u00ed\u017een\u00ed spojen\u00ed;\n<\/li>\n<li class=\"l\"> Pou\u017eit\u00ed techniky predikce \u0161\u00ed\u0159ky p\u00e1sma v ka\u017ed\u00e9m sm\u011bru pro zaji\u0161t\u011bn\u00ed optim\u00e1ln\u00ed intenzity odes\u00edl\u00e1n\u00ed paket\u016f, co\u017e zabra\u0148uje p\u0159echodu do stavu p\u0159et\u00ed\u017een\u00ed, ve kter\u00e9m doch\u00e1z\u00ed ke ztr\u00e1t\u011b paket\u016f;\n<\/li>\n<li class=\"l\">  V\u00fdrazn\u00fd <noindex><a rel=\"nofollow\" href=\"http:\/\/web.cs.wpi.edu\/~claypool\/ms\/quic\/quic-thesis.pdf\">n\u00e1r\u016fst<\/a><\/noindex> v\u00fdkonu a propustnosti ve srovn\u00e1n\u00ed s TCP. Pro video slu\u017eby, jako je YouTube, prok\u00e1zal QUIC sn\u00ed\u017een\u00ed operac\u00ed znovu vyrovn\u00e1n\u00ed b\u011bhem sledov\u00e1n\u00ed videa o 30%.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51807\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043d\u043e\u0447\u043d\u044b\u0435 \u0441\u0431\u043e\u0440\u043a\u0438 Firefox, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043b\u044f\u0433\u0443\u0442 \u0432 \u043e\u0441\u043d\u043e\u0432\u0443 \u0432\u044b\u043f\u0443\u0441\u043a\u0430 Firefox 72, \u0437\u0430\u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u043d\u0430 7 \u044f\u043d\u0432\u0430\u0440\u044f, \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 HTTP\/3. \u041f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e HTTP\/3 \u043e\u0442\u043a\u043b\u044e\u0447\u0451\u043d \u0438 \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u0430\u043a\u0442\u0438\u0432\u0430\u0446\u0438\u0438 \u043e\u043f\u0446\u0438\u0438 &#171;network.http.http3.enabled&#187; \u0432 about:config. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 HTTP\/3 \u0432 Firefox \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u043c \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Mozilla \u043f\u0440\u043e\u0435\u043a\u0442\u0435 neqo, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u043c \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 QUIC. \u041a\u043e\u0434 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432 \u0434\u043b\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 HTTP\/3 \u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-52244","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u043d\u043e\u0447\u043d\u044b\u0435 \u0441\u0431\u043e\u0440\u043a\u0438 Firefox, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043b\u044f\u0433\u0443\u0442 \u0432 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