{"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\/ro\/blog\/news\/v-nochnyh-sborkah-firefox-poyavilas-podderzhka-http-3","title":{"rendered":"\u00cen versiunile nightly ale Firefox a ap\u0103rut suportul pentru HTTP\/3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00cen <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mozilla.org\/en-US\/firefox\/channel\/desktop\/#nightly\">versiuni nocturne<\/a><\/noindex>  Firefox, care va sta la baza versiunii Firefox 72, programat\u0103 pentru 7 ianuarie, <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1581637\">a fost ad\u0103ugat\u0103<\/a><\/noindex> suport pentru protocolul HTTP\/3. Implicit, HTTP\/3 este dezactivat \u0219i necesit\u0103 activarea op\u021biunii &#171;network.http.http3.enabled&#187; \u00een about:config. <\/p>\n<p>Suportul HTTP\/3 \u00een Firefox se bazeaz\u0103 pe un proiect dezvoltat de compania Mozilla <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/mozilla\/neqo\">neqo<\/a><\/noindex>, care ofer\u0103 o implementare a clientului \u0219i serverului pentru protocolul QUIC. Codul componentelor pentru suportul HTTP\/3 \u0219i QUIC este scris \u00een limbajul Rust.<br \/>\nDin software-ul client, suportul experimental HTTP\/3 este deja  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51526\">a fost ad\u0103ugat\u0103<\/a><\/noindex> disponibil \u00een Chrome \u0219i curl, iar pentru servere este disponibil sub form\u0103 de  <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/cloudflare\/quiche\/tree\/master\/extras\/nginx\">modulului<\/a><\/noindex> pentru nginx \u0219i <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/cloudflare\/quiche\/blob\/master\/examples\/http3-server.rs\">un server de test<\/a><\/noindex> bazat pe biblioteca <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\">specifica\u021biei CSI prin sidecar-uri nu corespunde acestor cerin\u021be:<\/a><\/noindex>  QUIC \u0219i HTTP\/3 \u00een limbajul Rust de c\u0103tre Cloudflare). Pentru a verifica func\u021bionarea clien\u021bilor HTTP\/3, <noindex><a rel=\"nofollow\" href=\"https:\/\/bagder.github.io\/HTTP3-test\/\">au fost lansate<\/a><\/noindex> mai multe site-uri de test, dintre care majoritatea nu se deschid corect \u00een Firefox (HTTP\/3 este \u00een stadiul <noindex><a rel=\"nofollow\" href=\"https:\/\/datatracker.ietf.org\/doc\/draft-ietf-quic-http\/\">specifica\u021biei preliminare<\/a><\/noindex> \u0219i nu este standardizat complet).<\/p>\n<p>Reamintim c\u0103 HTTP\/3 standardizeaz\u0103 utilizarea protocolului QUIC ca transport pentru HTTP\/2. Protocolul <noindex><a rel=\"nofollow\" href=\"https:\/\/www.chromium.org\/quic\/\">QUIC<\/a><\/noindex> (Quick UDP Internet Connections) evolueaz\u0103 din 2013 de c\u0103tre compania Google ca o alternativ\u0103 la combina\u021bia TCP+TLS pentru Web, rezolv\u00e2nd problemele cu timpi mari de stabilire \u0219i negociere a conexiunilor \u00een TCP \u0219i elimin\u00e2nd \u00eent\u00e2rzierile cauzate de pierderea pachetelor \u00een timpul transferului de date. QUIC este o suprastructur\u0103 peste protocolul UDP, care suport\u0103 multiplexarea mai multor conexiuni \u0219i ofer\u0103 metode de criptare echivalente cu TLS\/SSL. <\/p>\n<p>Principalele <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.google.com\/document\/d\/1lmL9EF6qKrk7gbazY8bIdvq3Pno2Xj_l_YShP40GLQE\/preview?sle=true#\">grafica realizat\u0103 prin WebGL \u0219i<\/a><\/noindex> QUIC:\n<\/p>\n<ul>\n<li class=\"l\"> Securitate \u00eenalt\u0103, similar\u0103 cu TLS (\u00een esen\u021b\u0103, QUIC ofer\u0103 posibilitatea utiliz\u0103rii TLS peste UDP);\n<\/li>\n<li class=\"l\"> Controlul integrit\u0103\u021bii fluxului, prevenind pierderea pachetelor;\n<\/li>\n<li class=\"l\"> Posibilitatea de a stabili instantaneu o conexiune (0-RTT, \u00een aproximativ 75% din cazuri, datele pot fi transmise imediat dup\u0103 trimiterea pachetului de stabilire a conexiunii) \u0219i de a asigura \u00eent\u00e2rzieri minime \u00eentre trimiterea cererii \u0219i primirea r\u0103spunsului (RTT, Round Trip Time);\n<\/li>\n<li class=\"l\"> Neutilizarea la retransmiterea pachetului cu acela\u0219i num\u0103r de secven\u021b\u0103, ceea ce permite evitarea ambiguit\u0103\u021bilor \u00een determinarea pachetelor primite \u0219i eliminarea timeout-urilor;\n<\/li>\n<li class=\"l\"> Pierderea unui pachet afecteaz\u0103 livrarea doar a fluxului asociat \u0219i nu opre\u0219te livrarea datelor \u00een fluxurile transmise \u00een paralel prin conexiunea curent\u0103;\n<\/li>\n<li class=\"l\"> Mijloace de corectare a erorilor, care minimizeaz\u0103 \u00eent\u00e2rzierile cauzate de retransmisia pachetelor pierdute. Utilizarea unor coduri speciale de corectare a erorilor la nivel de pachet pentru a reduce situa\u021biile care necesit\u0103 retransmiterea datelor din pachetul pierdut.\n<\/li>\n<li class=\"l\"> Limitele blocurilor criptografice sunt aliniate cu limitele pachetelor QUIC, ceea ce reduce impactul pierderilor de pachete asupra decodific\u0103rii con\u021binutului pachetelor urm\u0103toare;\n<\/li>\n<li class=\"l\"> Lipsa problemelor cu blocarea cozii TCP;\n<\/li>\n<li class=\"l\"> Suport pentru identificatorul de conexiune, care permite reducerea timpului de reinstaurare a conexiunii pentru clien\u021bi mobile;\n<\/li>\n<li class=\"l\"> Posibilitatea de a activa mecanisme extinse de control al supra\u00eenc\u0103rc\u0103rii conexiunii;\n<\/li>\n<li class=\"l\"> Utilizarea tehnicii de previzionare a capacit\u0103\u021bii de transmisie \u00een fiecare direc\u021bie pentru a asigura o intensitate optim\u0103 a trimiterii pachetelor, prevenind astfel ajungerea \u00eentr-o stare de supra\u00eenc\u0103rcare, \u00een care se observ\u0103 pierderi de pachete;\n<\/li>\n<li class=\"l\">  Un salt semnificativ <noindex><a rel=\"nofollow\" href=\"http:\/\/web.cs.wpi.edu\/~claypool\/ms\/quic\/quic-thesis.pdf\">\u00een performan\u021b\u0103<\/a><\/noindex> \u0219i l\u0103\u021bime de band\u0103, comparativ cu TCP. Pentru serviciile video, cum ar fi YouTube, utilizarea QUIC a ar\u0103tat o reducere a opera\u021biunilor de rebuffering \u00een timpul vizion\u0103rii video cu 30%.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Sursa: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51807\">opennet.ro<\/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 5.0.2.1 - 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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