{"id":99904,"date":"2021-04-17T10:22:46","date_gmt":"2021-04-17T08:22:46","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vklyuchenie-podderzhki-http-3-v-firefox-namecheno-na-konecz-maya"},"modified":"2021-04-17T10:22:46","modified_gmt":"2021-04-17T08:22:46","slug":"vklyuchenie-podderzhki-http-3-v-firefox-namecheno-na-konecz-maya","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/vklyuchenie-podderzhki-http-3-v-firefox-namecheno-na-konecz-maya","title":{"rendered":"Aktivering af HTTP\/3-underst\u00f8ttelse i Firefox er planlagt til slutningen af maj","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Mozilla har meddelt, at de planl\u00e6gger at begynde en trinvis aktivering af HTTP\/3- og QUIC-protokollerne i Firefox 88, der er planlagt til den 19. april (oprindeligt forventedes udgivelsen den 20. april, men if\u00f8lge tidsplanen er den blevet flyttet en dag). I starten vil HTTP\/3-underst\u00f8ttelsen kun v\u00e6re aktiveret for en lille procentdel af brugerne, og hvis der ikke opst\u00e5r uforudsete problemer, vil den blive udrullet til alle inden slutningen af maj. I natbyggene og beta-versionerne blev HTTP\/3 aktiveret som standard i slutningen af marts.    <\/p>\n<p>Vi minder om, at implementeringen af HTTP\/3 i Firefox er baseret p\u00e5 Mozillas udviklingsprojekt neqo, som giver en klientimplementering og <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/dts-los-angeles\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3702\">server<\/a> for QUIC protocol. The components code for supporting HTTP\/3 and QUIC is written in Rust. To manage the enabling of HTTP\/3 in about:config, the option \"network.http.http3.enabled\" is provided. From the client software side, experimental support for HTTP\/3 has also been added in Chrome and curl, and for  <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/\"   title=\"servere\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1572\">servere<\/a> tilg\u00e6ngelig i nginx, samt i form af et nginx-modul og en testserver fra Cloudflare. P\u00e5 serverne underst\u00f8ttes HTTP\/3 allerede af Google og Facebook.     <\/p>\n<p>HTTP\/3 befinder sig stadig p\u00e5 stadiet af et udkastsspecifikation og er endnu ikke standardiseret i IETF. For at bruge HTTP\/3 kr\u00e6ves det, at b\u00e5de klienten og serveren har st\u00f8tte for den samme version af udkaststandarden QUIC og HTTP\/3, som angives i Alt-Svc-headeren (Firefox underst\u00f8tter udkastsspecifikationer fra 27 til 32).            <\/p>\n<p>HTTP\/3 definerer brugen af QUIC-protokollen som transportmiddel for HTTP\/2. QUIC (Quick UDP Internet Connections) er siden 2013 blevet udviklet af Google som et alternativ til TCP+TLS-kombinationen for web, der l\u00f8ser problemer med lang oprettelsestid og aftale af forbindelser i TCP og eliminerer forsinkelser ved tab af pakker under dataoverf\u00f8rsel. QUIC udg\u00f8r et lag oven p\u00e5 UDP-protokollen, som underst\u00f8tter multiplexing af flere forbindelser og leverer krypteringsmetoder, der svarer til TLS\/SSL. Under udviklingen af standarden i IETF er der foretaget \u00e6ndringer i protokollen, hvilket har f\u00f8rt til at der eksisterer to parallelle versioner, en for HTTP\/3 og en anden st\u00f8ttet af Google (Chrome underst\u00f8tter begge versioner).    <\/p>\n<p>Hovedfunktionerne ved QUIC:  <\/p>\n<ul>\n<li class=\"l\"> H\u00f8j sikkerhed svarende til TLS (faktisk giver QUIC mulighed for brug af TLS oven p\u00e5 UDP);  <\/li>\n<li class=\"l\"> Overv\u00e5gning af str\u00f8mmens integritet, der forhindrer tab af pakker;    <\/li>\n<li class=\"l\"> Mulighed for straks at etablere en forbindelse (0-RTT, i cirka 75% af tilf\u00e6ldene kan data overf\u00f8res umiddelbart efter, at forbindelsespakken er sendt) og sikre minimale forsinkelser mellem anmodningens afsendelse og modtagelsen af svar (RTT, Round Trip Time);    <\/li>\n<li class=\"l\"> Brug af et andet sekvensnummer ved genoverf\u00f8rsel af pakken, hvilket g\u00f8r det muligt at undg\u00e5 tvetydighed ved bestemmelse af modtagne pakker og eliminere timeouts;  <\/li>\n<li class=\"l\"> Pakketab p\u00e5virker kun leveringen af den tilknyttede str\u00f8m og stopper ikke dataoverf\u00f8rslen i parallelt overf\u00f8rte str\u00f8mme gennem den aktuelle forbindelse;    <\/li>\n<li class=\"l\"> Fejlkorrektionsmidler, der minimerer forsinkelser p\u00e5 grund af genoverf\u00f8rsel af tabte pakker. Brug af specialiserede fejlkorrektionskoder p\u00e5 pakkeniveau for at reducere situationer, der kr\u00e6ver genoverf\u00f8rsel af data fra en tabt pakke.   <\/li>\n<li class=\"l\"> Gr\u00e6nserne for kryptografiske blokke er justeret med gr\u00e6nserne for QUIC-pakker, hvilket reducerer tabspakkernes indvirkning p\u00e5 afkodningen af indholdet i efterf\u00f8lgende pakker;    <\/li>\n<li class=\"l\"> Ingen problemer med TCP-k\u00f8blokering;    <\/li>\n<li class=\"l\"> Underst\u00f8ttelse af forbindelsesidentifikatoren, der reducerer tiden til at etablere en genforbindelse for mobile klienter;  <\/li>\n<li class=\"l\"> Mulighed for at tilslutte udvidede mekanismer til overv\u00e5gning af forbindelsesoverbelastning;  <\/li>\n<li class=\"l\"> Brug af kapacitetsprognoseteknikker i hver retning for at sikre optimal intensitet i pakkeafsendelsen, hvilket forhindrer at glide ind i en overbelastningssituation, hvor pakkemister forekommer;    <\/li>\n<li class=\"l\">  Bem\u00e6rkelsesv\u00e6rdige pr\u00e6stations- og kapacitetsfor\u00f8gelser sammenlignet med TCP. For videotjenester s\u00e5som YouTube har anvendelsen af QUIC vist sig at reducere genbufferingsoperationer med 30% under videovisning.          <\/li>\n<p>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=54979\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Mozilla \u0441\u043e\u043e\u0431\u0449\u0438\u043b\u0430 \u043e \u043d\u0430\u043c\u0435\u0440\u0435\u043d\u0438\u0438 \u043d\u0430\u0447\u0430\u0442\u044c \u043f\u043e\u044d\u0442\u0430\u043f\u043d\u043e\u0435 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u043e\u0432 HTTP\/3 \u0438 QUIC \u0432 \u0432\u044b\u043f\u0443\u0441\u043a\u0435 Firefox 88, \u043d\u0430\u043c\u0435\u0447\u0435\u043d\u043d\u043e\u043c \u043d\u0430 19 \u0430\u043f\u0440\u0435\u043b\u044f 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