{"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\/sv\/blog\/news\/v-chrome-dobavlena-eksperimentalnaya-podderzhka-protokola-http-3","title":{"rendered":"Chrome har f\u00e5tt experimentellt st\u00f6d f\u00f6r HTTP\\\/3-protokollet","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>I experimentella versioner <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\">har lagts till<\/a><\/noindex> st\u00f6d f\u00f6r HTTP\/3-protokollet, som implementerar ett lager f\u00f6r att m\u00f6jligg\u00f6ra HTTP \u00f6ver QUIC-protokollet. QUIC-protokollet har lagts till i webbl\u00e4saren f\u00f6r fem \u00e5r sedan och har sedan dess anv\u00e4nts f\u00f6r att optimera arbetet med Googles tj\u00e4nster. Den version av QUIC som anv\u00e4ndes i Chrome skiljde sig n\u00e5got fr\u00e5n den version som <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/draft-ietf-quic-transport-23\">specifikationer<\/a><\/noindex> IETF, men nu \u00e4r implementeringarna synkroniserade.<\/p>\n<p>HTTP\/3 standardiserar anv\u00e4ndningen av QUIC som transport f\u00f6r HTTP\/2. F\u00f6r att aktivera HTTP\/3 och varianten av QUIC fr\u00e5n <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/draft-ietf-quic-transport-23\">23 utkast<\/a><\/noindex> IETF-specifikationer kr\u00e4ver att Chrome startas med alternativen &#171;&#8212;enable-quic &#8212;quic-version=h3-23&#187;, varefter testwebbplatsen \u00f6ppnas. <noindex><a rel=\"nofollow\" href=\"https:\/\/quic.rocks:4433\/\">quic.rocks:4433<\/a><\/noindex> I det n\u00e4tverksinspektionsl\u00e4get i utvecklarverktygen kommer aktiviteten f\u00f6r HTTP\/3 att visas som &#171;http\/2+quic\/99&#187;.<\/p>\n<p>Vi p\u00e5minner om att protokollet <noindex><a rel=\"nofollow\" href=\"https:\/\/www.chromium.org\/quic\/\">QUIC<\/a><\/noindex> (Quick UDP Internet Connections) har utvecklats av Google sedan 2013 som ett alternativ till TCP+TLS f\u00f6r webben, vilket l\u00f6ser problemet med l\u00e5ng tid f\u00f6r att etablera och f\u00f6rhandla anslutningar i TCP och eliminerar f\u00f6rdr\u00f6jningar vid paketf\u00f6rlust under datatransfer. QUIC utg\u00f6r ett lager ovanp\u00e5 UDP-protokollet, st\u00f6djer multiplexering av flera anslutningar och tillhandah\u00e5ller krypteringsmetoder som \u00e4r j\u00e4mf\u00f6rbara med TLS\/SSL. Det aktuella protokollet \u00e4r redan integrerat i Googles serverinfrastruktur, ing\u00e5r i Chrome, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48312\">planerat<\/a><\/noindex> f\u00f6r att aktiveras i Firefox och anv\u00e4nds aktivt f\u00f6r att hantera klientf\u00f6rfr\u00e5gningar p\u00e5 Googles servrar. <\/p>\n<p>Huvud <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.google.com\/document\/d\/1lmL9EF6qKrk7gbazY8bIdvq3Pno2Xj_l_YShP40GLQE\/preview?sle=true#\">funktioner<\/a><\/noindex> QUIC:\n<\/p>\n<ul>\n<li class=\"l\"> H\u00f6g s\u00e4kerhet, liknande TLS (i praktiken ger QUIC m\u00f6jlighet till anv\u00e4ndning av TLS \u00f6ver UDP);\n<\/li>\n<li class=\"l\"> Kontroll av str\u00f6mmens integritet, vilket f\u00f6rhindrar pak f\u00f6rlust;\n<\/li>\n<li class=\"l\"> M\u00f6jlighet att omedelbart uppr\u00e4tta en anslutning (0-RTT, i ungef\u00e4r 75% av fallen kan data \u00f6verf\u00f6ras omedelbart efter att anslutningsinstallationspaketet skickats) och s\u00e4kerst\u00e4lla minimala f\u00f6rdr\u00f6jningar mellan beg\u00e4ran och svar (RTT, Round Trip Time);\n<\/li>\n<li class=\"l\"> Ingen anv\u00e4ndning av samma sekvensnummer vid \u00e5ter\u00f6verf\u00f6ring av paket som g\u00f6r att man kan undvika tveksamhet vid identifieringen av mottagna paket och eliminera timeout-problem;\n<\/li>\n<li class=\"l\"> Paketsf\u00f6rlust p\u00e5verkar endast leveransen av den relaterade str\u00f6mmen och stoppar inte data\u00f6verf\u00f6ringen i parallella str\u00f6mmar som s\u00e4nds via den aktuella anslutningen;\n<\/li>\n<li class=\"l\"> Felkorrekteringsmedel som minimerar f\u00f6rseningar p\u00e5 grund av \u00e5ter\u00f6verf\u00f6ring av f\u00f6rlorade paket. Anv\u00e4ndning av speciella felkorrekteringskoder p\u00e5 paketniv\u00e5 f\u00f6r att minska situationer d\u00e4r \u00e5ter\u00f6verf\u00f6ring av f\u00f6rlorad data kr\u00e4vs.\n<\/li>\n<li class=\"l\"> Kryptografiska blockgr\u00e4nser \u00e4r anpassade till QUIC-paketgr\u00e4nser, vilket minskar inverkan av paketf\u00f6rluster p\u00e5 avkodningen av inneh\u00e5ll i efterf\u00f6ljande paket;\n<\/li>\n<li class=\"l\"> Ingen k\u00f6blockering som uppst\u00e5r i TCP;\n<\/li>\n<li class=\"l\"> St\u00f6d f\u00f6r anslutningsidentifierare som g\u00f6r att tiden f\u00f6r att \u00e5teransluta till mobila kunder minskar;\n<\/li>\n<li class=\"l\"> M\u00f6jlighet att ansluta avancerade mekanismer f\u00f6r \u00f6verbelastningskontroll;\n<\/li>\n<li class=\"l\"> Anv\u00e4ndning av tekniker f\u00f6r kapacitetsprognoser i varje riktning f\u00f6r att s\u00e4kerst\u00e4lla optimal paket\u00f6verf\u00f6ringstakt och f\u00f6rhindra att man hamnar i en \u00f6verbelastad status d\u00e4r paketf\u00f6rluster observeras;\n<\/li>\n<li class=\"l\">  S\u00e4rskild <noindex><a rel=\"nofollow\" href=\"http:\/\/web.cs.wpi.edu\/~claypool\/ms\/quic\/quic-thesis.pdf\">\u00f6kning<\/a><\/noindex> i prestanda och kapacitet j\u00e4mf\u00f6rt med TCP. F\u00f6r videotj\u00e4nster som YouTube har anv\u00e4ndningen av QUIC visat p\u00e5 en minskning av buffran under videoavspelning med 30%.\n<\/li>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>K\u00e4lla: <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 5.0.4 - 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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