Node.js 17.0 er udgivet, en platform til at k\u00f8re netv\u00e6rksapplikationer skrevet i JavaScript. Node.js 17.0 tilh\u00f8rer en version med almindelig support, hvor opdateringer vil blive udgivet indtil juni 2022. Stabilisering af Node.js 16-versionen vil blive afsluttet i de kommende dage, og den vil f\u00e5 LTS-status og blive underst\u00f8ttet indtil april 2024. St\u00f8tten til den tidligere LTS-version Node.js 14.0 vil vare indtil april 2023, mens st\u00f8tten til den f\u00f8r det, LTS-version 12.0, vil vare indtil april 2022. <\/p>\n
Hovedforbedringer: <\/p>\n
Der er ogs\u00e5 n\u00e6vnt to s\u00e5rbarheder (CVE-2021-22959, CVE-2021-22960), der er blevet rettet i de aktuelle versioner af Node.js. Disse s\u00e5rbarheder muligg\u00f8r angreb af typen \u00abHTTP Request Smuggling\u00bb (HRS), som g\u00f8r det muligt at inds\u00e6tte specielt formaterede klientanmodninger i indholdet af anmodninger fra andre brugere, der behandles i samme str\u00f8m mellem frontend og backend (for eksempel kan det f\u00f8re til indspr\u00f8jtning af ondsindet JavaScript-kode i en anden brugers session). Detaljer vil blive offentliggjort senere, men det vides allerede, at problemerne skyldes forkert behandling af mellemrum mellem navnet p\u00e5 HTTP-hovedet og kolon samt forskellig behandling af carriage return- og newline-tegn i parameterblokken, der bruges til at overf\u00f8re en foresp\u00f8rgsel i dele i \u00abchunked\u00bb tilstand. <\/p>\n
Vi minder om, at Node.js-platformen kan bruges b\u00e5de til serverh\u00e5ndtering af webapplikationer samt til udvikling af almindelige klient- og serverbaserede netv\u00e6rksprogrammer. For at udvide applikationernes funktionalitet er der udarbejdet et stort bibliotek af moduler, hvor man kan finde moduler med implementering. servere<\/a> og HTTP, SMTP, XMPP, DNS, FTP, IMAP, POP3 klienter, moduler til integration med forskellige web-rammer, WebSocket- og Ajax-h\u00e5ndterere, forbindelser til DBMS (MySQL, PostgreSQL, SQLite, MongoDB), templating-motorer, CSS-motorer, implementeringer af kryptografi-algoritmer og autorisationssystemer (OAuth), XML-parsere. <\/p>\n For the handling of a large number of parallel requests, Node.js utilizes an asynchronous code execution model based on event-driven, non-blocking I\/O and the definition of callback handlers. It supports multiplexing methods such as epoll, kqueue, \/dev\/poll, and select. The libuv library, which acts as a wrapper over libev in Unix systems and IOCP in Windows, is used for connection multiplexing. A thread pool is created using the libeio library, and for performing non-blocking DNS queries, c-ares is integrated. All blocking system calls are executed within the thread pool and then, similar to signal handlers, relay their results back via an unnamed pipe. JavaScript code execution is facilitated through the V8 engine developed by Google (Microsoft also develops a Node.js variant with the Chakra-Core engine). <\/p>\n I sin essence ligner Node.js p\u00e5 Perl AnyEvent, Ruby Event Machine, Python Twisted og implementeringen af events i Tcl, men begivenhedscyklen (event loop) i Node.js er skjult for udvikleren og minder om h\u00e5ndteringen af events i en webapplikation, der k\u00f8rer i en browser. N\u00e5r man skriver applikationer til Node.js, skal man tage h\u00f8jde for s\u00e6regenhederne ved begivenhedsorienteret programmering; for eksempel, i stedet for at udf\u00f8re 'var result = db.query('select..');' med ventetid p\u00e5 afslutningen og efterf\u00f8lgende behandling af resultaterne, anvender Node.js princippet for asynkron udf\u00f8relse, dvs. koden transformeres til 'db.query('select..', function (result) {behandling af resultat});', hvor kontrol straks overg\u00e5r til den videre kode, og resultatet af foresp\u00f8rgslen behandles, efterh\u00e5nden som dataene kommer ind. \u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 Node.js 17.0, \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b \u0434\u043b\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 JavaScript. Node.js 17.0 \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0441\u044f \u043a \u0432\u0435\u0442\u043a\u0435 \u0441 \u043e\u0431\u044b\u0447\u043d\u044b\u043c \u0441\u0440\u043e\u043a\u043e\u043c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438, \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0431\u0443\u0434\u0443\u0442 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0442\u044c\u0441\u044f \u0434\u043e \u0438\u044e\u043d\u044f 2022 \u0433\u043e\u0434\u0430. \u0412 \u0431\u043b\u0438\u0436\u0430\u0439\u0448\u0438\u0435 \u0434\u043d\u0438 \u0431\u0443\u0434\u0435\u0442 \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0430 \u0441\u0442\u0430\u0431\u0438\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u0432\u0435\u0442\u043a\u0438 Node.js 16, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u0442 \u0441\u0442\u0430\u0442\u0443\u0441 LTS \u0438 \u0431\u0443\u0434\u0435\u0442 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c\u0441\u044f \u0434\u043e \u0430\u043f\u0440\u0435\u043b\u044f 2024 \u0433\u043e\u0434\u0430. \u0421\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0448\u043b\u043e\u0439 LTS-\u0432\u0435\u0442\u043a\u0438 Node.js 14.0 […]<\/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-101702","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Udgivelse af serverbaseret JavaScript-platform Node.js 17.0 | ProHoster","description":"Node.js 17.0 er udgivet, en platform til at k\u00f8re netv\u00e6rksapplikationer skrevet i JavaScript. 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Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"