{"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\/et\/blog\/news\/v-chrome-dobavlena-eksperimentalnaya-podderzhka-protokola-http-3","title":{"rendered":"Chrome'i on lisatud eksperimentaalne tugi HTTP\/3 protokollile","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Katseline eksperimentaalseid kogumeid <noindex><a rel=\"nofollow\" href=\"https:\/\/www.google.com\/chrome\/canary\/\">Uus manifest on v\u00e4lja t\u00f6\u00f6tatud<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/programmingart\/status\/1174775953316294658\">lisatud<\/a><\/noindex> HTTP\/3 protokolli tugi, mis rakendab kihtide \u00fclemise osa HTTP t\u00f6\u00f6ks QUIC protokolli peal. QUIC protokoll lisati brauserisse viis aastat tagasi ning on sellest ajast alates kasutusel Google'i teenuste t\u00f6\u00f6tamise optimeerimiseks. Samas erineb Google'i Chrome'i variatsioon QUIC-ist m\u00f5ningatel detailidel variantidest, <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/draft-ietf-quic-transport-23\">spetsifikatsioonide<\/a><\/noindex> mis on IETF-is, kuid n\u00fc\u00fcd on rakendused s\u00fcnkroniseeritud.<\/p>\n<p>HTTP\/3 standardiseerib QUIC-i kasutamise HTTP\/2 transpordina. HTTP\/3 ja variandi QUIC aktiveerimiseks on vajalik <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/draft-ietf-quic-transport-23\">23 mustand<\/a><\/noindex> IETF spetsifikatsioonid n\u00f5uavad Chrome'i k\u00e4ivitamist valikute \u00fcksuste  &#171;&#8212;enable-quic &#8212;quic-version=h3-23&#187; abil, mille j\u00e4rel avatakse testimisveebileht. <noindex><a rel=\"nofollow\" href=\"https:\/\/quic.rocks:4433\/\">quic.rocks:4433<\/a><\/noindex> Arendajate t\u00f6\u00f6riistade v\u00f5rgukontrolli re\u017eiimis kuvatakse HTTP\/3 tegevus kui &#171;http\/2+quic\/99&#187;.<\/p>\n<p>Meenutame, et protokoll <noindex><a rel=\"nofollow\" href=\"https:\/\/www.chromium.org\/quic\/\">QUIC<\/a><\/noindex> (Quick UDP Internet Connections) on alates 2013. aastast arendatud Google'i poolt TCP+TLS alternatiivina veebis, lahendades TCP halva k\u00e4ivitamise ja \u00fchenduse kokkuleppimise probleeme ning k\u00f5rvaldades viivitused andmete edastamise k\u00e4igus pakkide kadumise t\u00f5ttu. QUIC on UDP protokolli \u00fclekattega, toetades mitme \u00fchenduse mitmekesistamist ning tagades kr\u00fcptimise meetodid, mis on v\u00f5rdsed TLS\/SSL-iga. Arutletav protokoll on juba integreeritud Google'i serveri infrastruktuuri, on osa Chrome'ist, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48312\">on planeeritud<\/a><\/noindex> et seda h\u00f5lpsalt kasutada Firefoxis ja aktiivselt rakendatakse Google'i serverites klientide p\u00e4ringute teenindamiseks. <\/p>\n<p>Peamised <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.google.com\/document\/d\/1lmL9EF6qKrk7gbazY8bIdvq3Pno2Xj_l_YShP40GLQE\/preview?sle=true#\">omadused<\/a><\/noindex> QUIC:\n<\/p>\n<ul>\n<li class=\"l\"> K\u00f5rge turvalisus, v\u00f5rreldav TLS'iga (QUIC pakub tegelikult v\u00f5imalust kasutada TLS'i UDP peal);\n<\/li>\n<li class=\"l\"> Voolu terviklikkuse j\u00e4lgimine, mis takistab pakettide kaotust;\n<\/li>\n<li class=\"l\"> V\u00f5ime koheselt \u00fchendust luua (0-RTT, umbes 75% juhtudest saab andmeid edastada kohe p\u00e4rast \u00fchenduse loomise paketi saatmist) ja tagada minimaalne viivitus k\u00fcsimise ja vastuse saamise vahel (RTT, Round Trip Time);\n<\/li>\n<li class=\"l\"> Paketi sama j\u00e4rjestuse numbri uuesti edastamisel mittekasutamine, mis v\u00f5imaldab v\u00e4ltida segadust vastuv\u00f5etud pakettide m\u00e4\u00e4ratlemisel ja kaotada aegumised;\n<\/li>\n<li class=\"l\"> Paketi kaotus m\u00f5jutab ainult selle kaasnevat voolu ja ei peata andmete edastamist samaaegselt praeguse \u00fchenduse kaudu edastatavatest voogudest;\n<\/li>\n<li class=\"l\"> Vigade parandusmeetmed, mis minimeerivad viivitusi kadunud pakettide uuesti edastamise t\u00f5ttu. Eriliste vigade parandamise koodide kasutamine paketi tasemel, et v\u00e4hendada olukordi, mis n\u00f5uavad kadunud paketi andmete uuesti edastamist.\n<\/li>\n<li class=\"l\"> Kr\u00fcptograafilised plokkide piirid on joondatud QUIC pakettide piiridega, mis v\u00e4hendab pakikaotuse m\u00f5ju j\u00e4rgmiste pakettide sisu dekodeerimisele;\n<\/li>\n<li class=\"l\"> TCP j\u00e4rjekorra ummistumise probleemide puudumine;\n<\/li>\n<li class=\"l\"> \u00dchenduse identifikaatori tugi, mis v\u00f5imaldab v\u00e4hendada mobiilsete klientide uuesti \u00fchendamise aega;\n<\/li>\n<li class=\"l\"> V\u00f5ime \u00fchendada laienevaid \u00fchenduse \u00fclekande kontrolli mehhanisme;\n<\/li>\n<li class=\"l\"> Igas suunas l\u00e4bilaskev\u00f5ime ennustamise tehnika kasutamine, et tagada pakkide edastamise optimaalne intensiivsus, v\u00e4ltides \u00fcleminekuid koormuse seisundisse, kus esineb pakettide kaotust;\n<\/li>\n<li class=\"l\">  T\u00e4htis <noindex><a rel=\"nofollow\" href=\"http:\/\/web.cs.wpi.edu\/~claypool\/ms\/quic\/quic-thesis.pdf\">kasv<\/a><\/noindex> t\u00f5hususes ja l\u00e4bilaskev\u00f5imes v\u00f5rreldes TCP-ga. Videoteenuste, nagu YouTube, puhul n\u00e4itas QUIC kasutamine video vaatamise jooksul uuesti vahepealsete operatsioonide v\u00e4henemist 30% v\u00f5rra.\n<\/li>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Allikas: <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 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\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\" \/>\n\t<meta name=\"robots\" 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