{"id":84853,"date":"2020-06-11T13:42:33","date_gmt":"2020-06-11T11:42:33","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/predvaritelnyj-vypusk-nginx-s-podderzhkoj-quic-i-http-3"},"modified":"2020-06-11T13:42:33","modified_gmt":"2020-06-11T11:42:33","slug":"predvaritelnyj-vypusk-nginx-s-podderzhkoj-quic-i-http-3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/predvaritelnyj-vypusk-nginx-s-podderzhkoj-quic-i-http-3","title":{"rendered":"F\u00f6rhandsversion av nginx med st\u00f6d f\u00f6r QUIC och HTTP\/3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>F\u00f6retaget NGINX <noindex><a rel=\"nofollow\" href=\"https:\/\/www.nginx.com\/blog\/introducing-technology-preview-nginx-support-for-quic-http-3\/\">tillk\u00e4nnagav<\/a><\/noindex> meddelar om p\u00e5b\u00f6rjan av testning <noindex><a rel=\"nofollow\" href=\"https:\/\/quic.nginx.org\/\">om implementering)<\/a><\/noindex> av protokollen QUIC och HTTP\/3 i HTTP-servern och proxynginx. Implementation baseras p\u00e5 <noindex><a rel=\"nofollow\" href=\"https:\/\/datatracker.ietf.org\/doc\/draft-ietf-quic-transport\/\">27-draften<\/a><\/noindex> av IETF-QUIC-specifikationen och \u00e4r tillg\u00e4nglig via <noindex><a rel=\"nofollow\" href=\"https:\/\/hg.nginx.org\/nginx-quic\/shortlog\/quic\">ett separat repository<\/a><\/noindex>, som \u00e4r en avgrening av version 1.19.0. Koden sprids under BSD-licensen och \u00f6verlappar inte med <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51695\">den tidigare f\u00f6reslagna<\/a><\/noindex> implementationen av HTTP\/3 f\u00f6r nginx fr\u00e5n Cloudflare, som \u00e4r ett separat projekt.<\/p>\n<p>St\u00f6det f\u00f6r HTTP\/3 i nginx \u00e4r m\u00e4rkt som experimentellt, eftersom <noindex><a rel=\"nofollow\" href=\"https:\/\/quic.nginx.org\/readme.html\">inte alla funktioner<\/a><\/noindex> i protokollet \u00e4r implementerade. Dock kan nginx redan anv\u00e4ndas f\u00f6r att skicka svar p\u00e5 enkla HTTP\/3-f\u00f6rfr\u00e5gningar \u00f6ver QUIC och ladda \/ \u00f6verf\u00f6ra stora filer. Bland de saknade funktionerna i protokollet noteras protokollversionsf\u00f6rhandling, ECN och \u00f6verbelastningskontroll, strukturerade loggar, \u00e5terh\u00e4mtningsl\u00e4ge (QUIC recovery, fl\u00f6des- och \u00f6verbelastningskontroll), NAT Rebinding, mobila adresser, Server push och anslutning av data (trailer). Dessutom erbjuds endast grundl\u00e4ggande st\u00f6d f\u00f6r behandling av ACK-paket och fl\u00f6deskontroll, som kr\u00e4ver ytterligare arbete. Inte alla krav i standarden har beaktats.<\/p>\n<p>F\u00f6r att aktivera HTTP\/3 kr\u00e4vs det att kompilera nginx med modulen http_v3_module och l\u00e4gga till ytterligare en direktiv<br \/>\nmed flaggan  f\u00f6r att skapa en lyssnande UDP-socket. Till exempel:<\/p>\n<p>   server {<br \/>\n       listen 443 ssl;              # TCP-socket f\u00f6r HTTP\/1.1<br \/>\n       listen 443 http3 reuseport;  # UDP-socket f\u00f6r  QUIC+HTTP\/3<\/p>\n<p>       ssl_protocols       TLSv1.3; # TLS 1.3 kr\u00e4vs i QUIC<br \/>\n       ssl_certificate     ssl\/www.example.com.crt;<br \/>\n       ssl_certificate_key ssl\/www.example.com.key;<\/p>\n<p>       add_header Alt-Svc 'quic=':443'; # indikerar tillg\u00e4nglighet av QUIC<br \/>\n       add_header QUIC-Status $quic;     # Header med status f\u00f6r anv\u00e4ndning av QUIC<br \/>\n   }<\/p>\n<p>Vi p\u00e5minner om att HTTP\/3 standardiserar anv\u00e4ndningen av protokollet QUIC som transport f\u00f6r HTTP\/2. Protokollet <noindex><a rel=\"nofollow\" href=\"https:\/\/www.chromium.org\/quic\/\">QUIC<\/a><\/noindex> (Quick UDP Internet Connections) har sedan 2013 utvecklats av Google som ett alternativ till TCP+TLS f\u00f6r webben, som l\u00f6ser problem med l\u00e5ng tid f\u00f6r etablering och f\u00f6rhandling av anslutningar i TCP och eliminerar f\u00f6rdr\u00f6jningar vid paketf\u00f6rluster under datatransmission. QUIC \u00e4r ett \u00f6verliggande protokoll ovanp\u00e5 UDP som st\u00f6der multiplexering av flera anslutningar och tillhandah\u00e5ller krypteringsmetoder som motsvarar TLS\/SSL. P\u00e5 klientsidan har experimentellt st\u00f6d f\u00f6r HTTP\/3 redan lagts till i  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51540\">Curl<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51807\">Firefox<\/a><\/noindex> och <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51526\">Chromium<\/a><\/noindex>.<br \/>\n<center><noindex><a rel=\"nofollow\" href=\"https:\/\/www.nginx.com\/wp-content\/uploads\/2020\/06\/HTTP-v1-v2-v3-stacks.png\"><img decoding=\"async\" alt=\"F\u00f6rhandsversion av nginx med st\u00f6d f\u00f6r QUIC och HTTP\/3\" src=\"\/wp-content\/uploads\/2020\/06\/d476eb3270bffc2caef1cb0fc79c38f5.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/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, j\u00e4mf\u00f6rbar med TLS (QUIC g\u00f6r i grunden det m\u00f6jligt att anv\u00e4nda TLS 1.3 \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);<br \/>\n<center><noindex><a rel=\"nofollow\" href=\"https:\/\/lh3.googleusercontent.com\/o62Ohn1Ppxna6zz0NtavqRyetjryOj-81Sz4bRt3U8lURVblk5RKOaCcf57i6BkmprremePJpq_sQcxfJiuA4wJBmRp3pR4BS1P-yiT6UNUPvnBeP_rLz9bvHxFE15kuNBM2hpE?a.png\"><img decoding=\"async\" alt=\"F\u00f6rhandsversion av nginx med st\u00f6d f\u00f6r QUIC och HTTP\/3\" src=\"\/wp-content\/uploads\/2020\/06\/44e238666531ad98d2e7939a0d376ce5.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\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\"> Gr\u00e4nserna f\u00f6r kryptografiska block \u00f6verensst\u00e4mmer med gr\u00e4nserna f\u00f6r QUIC-paketen, vilket minskar p\u00e5verkan av paketf\u00f6rluster p\u00e5 avkodningen av inneh\u00e5llet 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=53137\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f NGINX \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e \u043d\u0430\u0447\u0430\u043b\u0435 \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u043e\u0432 QUIC \u0438 HTTP\/3 \u0432 HTTP-\u0441\u0435\u0440\u0432\u0435\u0440\u0435 \u0438 \u043f\u0440\u043e\u043a\u0441\u0438 nginx. \u0420\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 27 \u0447\u0435\u0440\u043d\u043e\u0432\u0438\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 IETF-QUIC \u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u0430 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0439 \u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u0439, \u043e\u0442\u0432\u0435\u0442\u0432\u043b\u0451\u043d\u043d\u044b\u0439 \u043e\u0442 \u0432\u044b\u043f\u0443\u0441\u043a\u0430 1.19.0. \u041a\u043e\u0434 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 BSD \u0438 \u043d\u0435 \u043f\u0435\u0440\u0435\u0441\u0435\u043a\u0430\u0435\u0442\u0441\u044f \u0441 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u043e\u0439 \u0440\u0430\u043d\u0435\u0435 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 HTTP\/3 \u0434\u043b\u044f nginx \u043e\u0442 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Cloudflare, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u043c \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":84854,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-84853","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" 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