{"id":38322,"date":"2019-10-31T22:22:58","date_gmt":"2019-10-31T19:22:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/v-chrome-dobavlena-eksperimentalnaya-podderzhka-protokola-http-3\/"},"modified":"2019-10-31T22:22:58","modified_gmt":"2019-10-31T19:22:58","slug":"v-chrome-dobavlena-eksperimentalnaya-podderzhka-protokola-http-3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/v-chrome-dobavlena-eksperimentalnaya-podderzhka-protokola-http-3","title":{"rendered":"A Chrome-ba k\u00eds\u00e9rleti t\u00e1mogat\u00e1s ker\u00fclt a HTTP\\\/3 protokollhoz","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>K\u00eds\u00e9rleti build-ekben <noindex><a rel=\"nofollow\" href=\"https:\/\/www.google.com\/chrome\/canary\/\">Chrome Canary<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/programmingart\/status\/1174775953316294658\">hozz\u00e1adva lett<\/a><\/noindex> A HTTP\/3 protokoll t\u00e1mogat\u00e1sa, amely egy r\u00e9teget biztos\u00edt a HTTP QUIC protokoll felett. A QUIC protokoll k\u00f6zvetlen\u00fcl \u00f6t \u00e9ve lett bevezetve a b\u00f6ng\u00e9sz\u0151kbe, \u00e9s az\u00f3ta is a Google szolg\u00e1ltat\u00e1sainak optimaliz\u00e1l\u00e1s\u00e1t szolg\u00e1lja. A Chrome-ban haszn\u00e1lt QUIC v\u00e1ltozata n\u00e9mileg k\u00fcl\u00f6nb\u00f6z\u00f6tt az IETF v\u00e1ltozat\u00e1t\u00f3l, <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/draft-ietf-quic-transport-23\">a Microsoft specifik\u00e1ci\u00f3i alapj\u00e1n fejlesztenek<\/a><\/noindex> de mostant\u00f3l az implement\u00e1ci\u00f3k szinkroniz\u00e1ltak.<\/p>\n<p>A HTTP\/3 a QUIC haszn\u00e1lat\u00e1t szabv\u00e1nyos\u00edtja a HTTP\/2 sz\u00e1ll\u00edt\u00e1s\u00e1hoz. A HTTP\/3 \u00e9s a QUIC v\u00e1ltozat\u00e1nak aktiv\u00e1l\u00e1s\u00e1hoz <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/draft-ietf-quic-transport-23\">23-as tervezet<\/a><\/noindex> Az IETF specifik\u00e1ci\u00f3i szerint a Chrome-ot a k\u00f6vetkez\u0151 opci\u00f3kkal kell ind\u00edtani: &#171;&#8212;enable-quic &#8212;quic-version=h3-23&#187;, majd a tesztoldal megnyit\u00e1sa ut\u00e1n <noindex><a rel=\"nofollow\" href=\"https:\/\/quic.rocks:4433\/\">quic.rocks:4433<\/a><\/noindex> a fejleszt\u0151i eszk\u00f6z\u00f6k h\u00e1l\u00f3zati ellen\u0151rz\u00e9si m\u00f3dj\u00e1ban a HTTP\/3 aktivit\u00e1s &#171;http\/2+quic\/99&#187; form\u00e1ban fog megjelenni.<\/p>\n<p>Ne feledj\u00fck, hogy a <noindex><a rel=\"nofollow\" href=\"https:\/\/www.chromium.org\/quic\/\">QUIC<\/a><\/noindex> (Gyors UDP Internet Kapcsolatok) a Google \u00e1ltal 2013 \u00f3ta k\u00e9sz\u00fcl, mint alternat\u00edva a TCP+TLS kombin\u00e1ci\u00f3val szemben, amely megoldja a TCP kapcsolatok hossz\u00fa be\u00e1ll\u00edt\u00e1si \u00e9s egyeztet\u00e9si idej\u00e9vel kapcsolatos probl\u00e9m\u00e1kat, \u00e9s megsz\u00fcnteti a k\u00e9sleltet\u00e9seket az adat\u00e1tvitel sor\u00e1n a csomagveszt\u00e9s eset\u00e9n. A QUIC egy UDP protokollra \u00e9p\u00edt, amely t\u00e1mogatja a t\u00f6bb kapcsolat multiplexel\u00e9s\u00e9t, \u00e9s olyan titkos\u00edt\u00e1si m\u00f3dszereket k\u00edn\u00e1l, amelyek megfelelnek a TLS\/SSL-nek. A sz\u00f3ban forg\u00f3 protokoll m\u00e1r integr\u00e1lva van a Google kiszolg\u00e1l\u00f3 infrastrukt\u00far\u00e1j\u00e1ba, r\u00e9sze a Chrome-nak, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48312\">tervezett<\/a><\/noindex> akt\u00edvan haszn\u00e1lj\u00e1k a Firefoxba val\u00f3 integr\u00e1l\u00e1shoz \u00e9s a Google szerverein t\u00f6rt\u00e9n\u0151 klienti k\u00e9rd\u00e9sek kezel\u00e9s\u00e9re. <\/p>\n<p>F\u0151 <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.google.com\/document\/d\/1lmL9EF6qKrk7gbazY8bIdvq3Pno2Xj_l_YShP40GLQE\/preview?sle=true#\">jellemz\u0151i<\/a><\/noindex> QUIC:\n<\/p>\n<ul>\n<li class=\"l\"> Magas biztons\u00e1g, amely hasonl\u00f3 a TLS-hez (l\u00e9nyeg\u00e9ben a QUIC lehet\u0151v\u00e9 teszi a TLS haszn\u00e1lat\u00e1t az UDP-n \u00fcst\u00f6k\u00f6lve);\n<\/li>\n<li class=\"l\"> A folyam integrit\u00e1s\u00e1nak ellen\u0151rz\u00e9se, amely megakad\u00e1lyozza a csomagok elveszt\u00e9s\u00e9t;\n<\/li>\n<li class=\"l\"> A kapcsolat azonnali l\u00e9trehoz\u00e1s\u00e1nak lehet\u0151s\u00e9ge (0-RTT, k\u00f6r\u00fclbel\u00fcl 75%-os esetekben az adatokat k\u00f6zvetlen\u00fcl a kapcsolati csomag elk\u00fcld\u00e9se ut\u00e1n lehet \u00e1tkonvert\u00e1lni) \u00e9s minimaliz\u00e1lva a k\u00e9sleltet\u00e9st a k\u00e9r\u00e9s k\u00fcld\u00e9se \u00e9s a v\u00e1lasz meg\u00e9rkez\u00e9se k\u00f6z\u00f6tt (RTT, Round Trip Time);\n<\/li>\n<li class=\"l\"> Nem haszn\u00e1lja ugyanazt a szekvenci\u00e1lis sz\u00e1mot egy csomag \u00fajrak\u00fcld\u00e9sekor, ami lehet\u0151v\u00e9 teszi a kapott csomagok egy\u00e9rtelm\u0171 azonos\u00edt\u00e1s\u00e1t \u00e9s a timeoutok elker\u00fcl\u00e9s\u00e9t;\n<\/li>\n<li class=\"l\"> Csomag elveszt\u00e9se csak az ahhoz kapcsol\u00f3d\u00f3 folyamat sz\u00e1ll\u00edt\u00e1s\u00e1t befoly\u00e1solja, \u00e9s nem \u00e1ll\u00edtja le az adatokat a p\u00e1rhuzamosan \u00e1tkonvert\u00e1lt folyamatok sz\u00e1ll\u00edt\u00e1s\u00e1ban;\n<\/li>\n<li class=\"l\"> Hibaellen\u0151rz\u0151 eszk\u00f6z\u00f6k, amelyek minimaliz\u00e1lj\u00e1k a k\u00e9s\u00e9seket az elveszett csomagok \u00fajrak\u00fcld\u00e9se miatt. Speci\u00e1lis hibaellen\u0151rz\u0151 k\u00f3dok haszn\u00e1lata csomagszinten a vesztes csomagok \u00fajrak\u00fcld\u00e9s\u00e9nek sz\u00fcks\u00e9gess\u00e9g\u00e9nek cs\u00f6kkent\u00e9s\u00e9re.\n<\/li>\n<li class=\"l\"> A kriptogr\u00e1fiai blokkok hat\u00e1rai \u00f6sszhangban \u00e1llnak a QUIC csomagok hat\u00e1raival, ami cs\u00f6kkenti a csomagveszt\u00e9sek hat\u00e1s\u00e1t a k\u00f6vetkez\u0151 csomagok dek\u00f3dol\u00e1s\u00e1ra;\n<\/li>\n<li class=\"l\"> Nincsenek probl\u00e9m\u00e1k a TCP sorok blokkol\u00e1s\u00e1val;\n<\/li>\n<li class=\"l\"> T\u00e1mogatja a kapcsolati azonos\u00edt\u00f3t, amely lehet\u0151v\u00e9 teszi a mobil kliensek sz\u00e1m\u00e1ra a visszakapcsol\u00f3d\u00e1si id\u0151 cs\u00f6kkent\u00e9s\u00e9t;\n<\/li>\n<li class=\"l\"> A kapcsolati t\u00falterhel\u00e9s-ellen\u0151rz\u00e9si mechanizmusok kiterjesztett lehet\u0151s\u00e9geinek csatlakoztat\u00e1sa;\n<\/li>\n<li class=\"l\"> S\u00e1vsz\u00e9less\u00e9g-el\u0151rejelz\u00e9si technik\u00e1k haszn\u00e1lata mindk\u00e9t ir\u00e1nyban a csomagok optim\u00e1lis k\u00fcld\u00e9si intenzit\u00e1s\u00e1nak biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben, elker\u00fclve a t\u00falterhelts\u00e9gi \u00e1llapotba val\u00f3 ker\u00fcl\u00e9st, amely csomagveszt\u00e9st eredm\u00e9nyez;\n<\/li>\n<li class=\"l\">  \u00c9szlelhet\u0151 <noindex><a rel=\"nofollow\" href=\"http:\/\/web.cs.wpi.edu\/~claypool\/ms\/quic\/quic-thesis.pdf\">n\u00f6veked\u00e9s<\/a><\/noindex> a teljes\u00edtm\u00e9nyben \u00e9s a s\u00e1vsz\u00e9less\u00e9gben a TCP-hez k\u00e9pest. Vide\u00f3szolg\u00e1ltat\u00e1sok, p\u00e9ld\u00e1ul a YouTube eset\u00e9ben a QUIC alkalmaz\u00e1sa 30%-kal cs\u00f6kkentette a vide\u00f3 n\u00e9z\u00e9se alatt a bufferel\u00e9si m\u0171veletek sz\u00e1m\u00e1t.\n<\/li>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Forr\u00e1s: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51526\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u044b\u0435 \u0441\u0431\u043e\u0440\u043a\u0438 Chrome Canary \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, \u0440\u0435\u0430\u043b\u0438\u0437\u0443\u044e\u0449\u0435\u0433\u043e \u043d\u0430\u0434\u0441\u0442\u0440\u043e\u0439\u043a\u0443 \u0434\u043b\u044f \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u0440\u0430\u0431\u043e\u0442\u044b HTTP \u043f\u043e\u0432\u0435\u0440\u0445 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 QUIC. \u041d\u0435\u043f\u043e\u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b QUIC \u0431\u044b\u043b \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440 \u043f\u044f\u0442\u044c \u043b\u0435\u0442 \u043d\u0430\u0437\u0430\u0434 \u0438 \u0441 \u0442\u0435\u0445 \u043f\u043e\u0440 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0434\u043b\u044f \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438 \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0441\u0435\u0440\u0432\u0438\u0441\u0430\u043c\u0438 Google. \u041f\u0440\u0438 \u044d\u0442\u043e\u043c \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0432\u0448\u0438\u0439\u0441\u044f \u0432 Chrome \u0432\u0430\u0440\u0438\u0430\u043d\u0442 QUIC \u043e\u0442 Google \u0432 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0434\u0435\u0442\u0430\u043b\u044f\u0445 \u043e\u0442\u043b\u0438\u0447\u0430\u043b\u0441\u044f \u043e\u0442 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430 \u0438\u0437 [&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-38322","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 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