{"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\/et\/blog\/novosti-interneta\/predvaritelnyj-vypusk-nginx-s-podderzhkoj-quic-i-http-3","title":{"rendered":"Eelversion nginx toetusega QUIC ja HTTP\/3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>NGINX ettev\u00f5te <noindex><a rel=\"nofollow\" href=\"https:\/\/www.nginx.com\/blog\/introducing-technology-preview-nginx-support-for-quic-http-3\/\">teatas<\/a><\/noindex> teavitab katsetuste algusest <noindex><a rel=\"nofollow\" href=\"https:\/\/quic.nginx.org\/\">rakenduste<\/a><\/noindex> QUIC ja HTTP\/3 protokollide osas nginx HTTP serveris ja proksis. Teostus p\u00f5hineb <noindex><a rel=\"nofollow\" href=\"https:\/\/datatracker.ietf.org\/doc\/draft-ietf-quic-transport\/\">27. eeln\u00f5ul<\/a><\/noindex> IETF-QUIC spetsifikatsioonist ja on saadaval l\u00e4bi <noindex><a rel=\"nofollow\" href=\"https:\/\/hg.nginx.org\/nginx-quic\/shortlog\/quic\">eraldiseisva hoidla<\/a><\/noindex>, mis on haru versioonist 1.19.0. Kood levitatakse BSD litsentsi alusel ja ei p\u00f5rku kokku <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51695\">varasemalt pakutud<\/a><\/noindex> HTTP\/3 teostusega nginxis Cloudflare'i poolt, mis on eraldi projekt.<\/p>\n<p>HTTP\/3 toetus nginxis on m\u00e4rgistatud katsetamiseks, kuna <noindex><a rel=\"nofollow\" href=\"https:\/\/quic.nginx.org\/readme.html\">k\u00f5iki funktsioone<\/a><\/noindex> protokollist ei ole rakendatud. Sellegipoolest saab nginxit kasutada lihtsate HTTP\/3 p\u00e4ringute vastamiseks QUIC-i kaudu ning suurte failide saatmiseks\/vastuv\u00f5tmiseks. Protokolli puuduvate funktsioonide seas on versiooni kokkuleppe vahendid, ECN ja \u00fclekoormuse kontroll, struktureeritud logid, taastamisre\u017eiim (QUIC recovery, voogude ja \u00fclekoormuse haldamine), NAT Rebinding, mobiilsete aadresside toetus, Server push, andmete lisamine (trailer). Samuti on pakkuda vaid p\u00f5hitoetus ACK-pakettide t\u00f6\u00f6tlemiseks ja voogude haldamiseks, mis vajab t\u00e4iustamist. K\u00f5iki standardi n\u00f5udeid ei ole arvesse v\u00f5etud.<\/p>\n<p>HTTP\/3 aktiveerimiseks tuleb nginx koguda koos http_v3_module mooduliga ja lisada t\u00e4iendav direktiiv<br \/>\nkoos lipuga  UDP soketi loomiseks. N\u00e4iteks:<\/p>\n<p>   server {<br \/>\n       listen 443 ssl;              # TCP-soket HTTP\/1.1 jaoks<br \/>\n       listen 443 http3 reuseport;  # UDP-soket QUIC+HTTP\/3 jaoks<\/p>\n<p>       ssl_protocols       TLSv1.3; # QUIC-i korral on TLS 1.3 kohustuslik<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='&lt;:443&#039;&#039;; # m\u00e4rk QUIC k\u00e4ttesaadavuse kohta<br \/>\n       add_header QUIC-Status $quic;     # QUIC-i kasutuseisendi staatuse pealkiri<br \/>\n   }<\/p>\n<p>Meenutame, et HTTP\/3 standardiseerib QUIC protokolli kasutamise HTTP\/2 transpordina. 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 alternatiivina TCP+TLS komplektile, lahendades TCP-s suurte \u00fchenduse seadistamise ja tunnustamise aegade probleemid ning k\u00f5rvaldades viivitused andmeedastuse k\u00e4igus pakettide kadumise t\u00f5ttu. QUIC on UDP protokolli pealispind, mis toetab mitme \u00fchenduse mitme loomise ja pakub kr\u00fcpteerimismeetodeid, mis on v\u00f5rdsed TLS\/SSL-iga. Klientide tarkvara poolel on katsetav tugi HTTP\/3-le juba lisatud.  <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> ja <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=\"Eelversion nginx toetusega QUIC ja HTTP\/3\" src=\"\/wp-content\/uploads\/2020\/06\/d476eb3270bffc2caef1cb0fc79c38f5.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/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, mis on analoogne TLS-iga (QUIC pakub tegelikult v\u00f5imalust kasutada TLS 1.3 UDP peal);\n<\/li>\n<li class=\"l\"> Voogude terviklikkuse kontrollimine, mis takistab pakettide kadumist;\n<\/li>\n<li class=\"l\"> Kohene \u00fchenduse loomise v\u00f5imalus (0-RTT, umbes 75% juhtudest saab andmeid edastada kohe p\u00e4rast \u00fchenduse loomise paketi saatmist) ning tagab minimaalsed viivitused p\u00e4ringu saatmise ja vastuse saamise vahel (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=\"Eelversion nginx toetusega QUIC ja 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\"> Ei kasutata sama j\u00e4rjestikuse numbri paketi kordussaatmisel, mis v\u00f5imaldab v\u00e4ltida segadust saadud paketide tuvastamisel ja k\u00f5rvaldab ajutised katkestused;\n<\/li>\n<li class=\"l\"> Paketi kadu m\u00f5jutab ainult seotud voogu ja ei peata andmete edastamist paralleelselt edastatavatest voogudest l\u00e4bi praeguse \u00fchenduse;\n<\/li>\n<li class=\"l\"> Vigade parandamise vahendid, mis minimeerivad viivitused kadunud pakettide kordussaatmise t\u00f5ttu. Spetsiaalsete vigade parandamise koodide kasutamine paketi tasandil, et v\u00e4hendada olukordade arvu, mis vajavad kadunud paketi andmete uuesti edastamist.\n<\/li>\n<li class=\"l\"> Kr\u00fcptograafiliste plokkide piirid on joondatud QUIC pakettide piiride k\u00fclge, mis v\u00e4hendab pakettide kadumise m\u00f5ju j\u00e4rgmiste pakettide sisu dekodeerimisele;\n<\/li>\n<li class=\"l\"> TCP j\u00e4rjekorra ummistusega seotud probleeme pole.\n<\/li>\n<li class=\"l\"> \u00dchenduse identifikaatori toetus, mis v\u00f5imaldab mobiilsete klientide uuesti \u00fchendamise aega l\u00fchendada;\n<\/li>\n<li class=\"l\"> T\u00e4psemate \u00fchenduse koormusjuhtimise mehanismide toetus;\n<\/li>\n<li class=\"l\"> V\u00f5imet kasutada igas suunas l\u00e4bip\u00e4\u00e4sutehnika prognoosimist, et tagada optimaalne pakettide saatmise intensiivsus, v\u00e4ltides \u00fclekoormusse sattumist, mille korral toimub pakettide kadu;\n<\/li>\n<li class=\"l\">  Silmatorkav <noindex><a rel=\"nofollow\" href=\"http:\/\/web.cs.wpi.edu\/~claypool\/ms\/quic\/quic-thesis.pdf\">kasv<\/a><\/noindex> suurem j\u00f5udlus ja l\u00e4bilaskev\u00f5ime, v\u00f5rreldes TCP-ga. Video teenuste, nagu YouTube, puhul on QUIC-i kasutamine v\u00e4hendanud uuesti puhverdamise operatsioonide arvu video vaatamise ajal 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=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. 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