{"id":92099,"date":"2020-08-22T19:42:21","date_gmt":"2020-08-22T17:42:21","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dlya-chrome-razvivaetsya-api-dlya-pryamyh-tcp-i-udp-kommunikaczij"},"modified":"2020-08-22T19:42:21","modified_gmt":"2020-08-22T17:42:21","slug":"dlya-chrome-razvivaetsya-api-dlya-pryamyh-tcp-i-udp-kommunikaczij","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/dlya-chrome-razvivaetsya-api-dlya-pryamyh-tcp-i-udp-kommunikaczij","title":{"rendered":"Et API til direkte TCP- og UDP-kommunikation er under udvikling til Chrome","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Google er begyndt<\/a><\/noindex> at implementere et nyt API i Chrome Raw Sockets<\/a><\/noindex>, som giver webapplikationer mulighed for at etablere direkte netv\u00e6rksforbindelser ved brug af TCP- og UDP-protokoller. I 2015 blev der gjort et fors\u00f8g p\u00e5 at standardisere API «TCP and UDP Socket<\/a><\/noindex>«, men deltagerne i arbejdsgruppen n\u00e5ede ikke til enighed, og udviklingen af dette API blev stoppet.<\/p>\n

Behovet for at tilf\u00f8je det nye API forklares ved muligheden for at interagere med netv\u00e6rksenheder, der bruger egne protokoller, der fungerer oven p\u00e5 TCP og UDP og ikke underst\u00f8tter interaktion via HTTPS eller WebSockets. Det bem\u00e6rkes, at API'et Raw Sockets vil supplere eksisterende lave niveau programmeringsgr\u00e6nseflader i browseren som WebUSB, WebMIDI og WebBluetooth, der muligg\u00f8r interaktion med lokale enheder.<\/p>\n

For at undg\u00e5 negativ indflydelse p\u00e5 sikkerheden vil API'et Raw Sockets kun tillade netv\u00e6rksanmodninger, der er initieret med brugerens samtykke, og begr\u00e6nset til en liste over tilladte v\u00e6rter godkendt af brugeren. Brugeren skal eksplicit bekr\u00e6fte den f\u00f8rste forbindelse til en ny v\u00e6rt. Ved hj\u00e6lp af et specielt flag vil brugeren kunne deaktivere visningen af tilbageholdte anmodninger om bekr\u00e6ftelse ved gentagne forbindelser til den samme v\u00e6rt. For at forhindre DDoS-angreb vil intensiteten af henvendelser gennem Raw Sockets blive limiteret, og anmodninger kan kun sendes efter brugerens interaktion med siden. UDP-pakker modtaget fra v\u00e6rter, som ikke er godkendt af brugeren, vil blive ignoreret og ikke n\u00e5 webapplikationen.<\/p>\n

Den indledende implementering forudser ikke oprettelse af lytte-sockets, men i fremtiden kan der komme opkald til at modtage indg\u00e5ende forbindelser fra localhost eller en liste over kendte v\u00e6rter. Der n\u00e6vnes ogs\u00e5 behovet for beskyttelse mod angreb «DNS rebinding<\/a><\/noindex>» (en angriber kan p\u00e5 DNS-niveau \u00e6ndre IP-adressen for et godkendt dom\u00e6nenavn og f\u00e5 adgang til andre v\u00e6rter). Adgang til dom\u00e6ner, der opl\u00f8ses til 127.0.0.0\/8, og intranetnetv\u00e6rk planl\u00e6gges at blive blokeret (henvendelser til localhost foresl\u00e5s kun at blive tilladt ved eksplicit indtastning af IP-adressen i bekr\u00e6ftelsesformularen).<\/p>\n

Bland de risici, der kan opst\u00e5 ved implementeringen af et nyt API, n\u00e6vnes dets mulige afvisning af producenter af andre browsere, hvilket kan f\u00f8re til kompatibilitetsproblemer. Udviklerne af Mozilla Gecko- og WebKit-motorerne har endnu ikke taget<\/a><\/noindex> stillig til den mulige implementering af API'en Raw Sockets, men Mozilla har tidligere foresl\u00e5et et lignende API<\/a><\/noindex>. Hvis API'en Raw Sockets godkendes i det f\u00f8rste trin, planl\u00e6gges det at aktivere den i Chrome OS, og derefter tilbyde den til Chrome-brugere p\u00e5 andre systemer.<\/p>\n

Webudviklere har v\u00e6ret positive<\/a><\/noindex> over det nye API og har fremsat mange nye ideer til dets anvendelse i omr\u00e5der, hvor API'en XMLHttpRequest, WebSocket og WebRTC er utilstr\u00e6kkelige (fra oprettelsen af browserklienter til SSH, RDP, IMAP, SMTP, IRC og udskrivningsprotokoller til udvikling af distribuerede P2P-systemer med DHT (Distributed Hash Table), underst\u00f8ttelse af IPFS og interaktion med specifikke IoT-enhedsprotokoller).<\/p>\n

<\/a><\/noindex><\/p>\n

Kilde: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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