Wydano Node.js w wersji 19.0, platformy do uruchamiania aplikacji sieciowych w j\u0119zyku JavaScript. Node.js 19 nale\u017cy do ga\u0142\u0119zi o standardowym okresie wsparcia, aktualizacje b\u0119d\u0105 wydawane do czerwca 2023 roku. W najbli\u017cszych dniach zako\u0144czona zostanie stabilizacja ga\u0142\u0119zi Node.js 18, kt\u00f3ra uzyska status LTS i b\u0119dzie wspierana do kwietnia 2025 roku. Wsparcie dla poprzedniej ga\u0142\u0119zi LTS Node.js 16.0 potrwa do wrze\u015bnia 2023 roku, a dla ga\u0142\u0119zi 14.0 do kwietnia 2023 roku. <\/p>\n
Zaimplementowano wywo\u0142ania systemowe waitid (oczekiwanie na zmian\u0119 stanu procesu), pinsyscall (do przekazywania informacji o punkcie wej\u015bcia execve w celu ochrony przed exploitami ROP), getthrname i setthrname (uzyskiwanie i ustalanie nazwy w\u0105tku). <\/p>\n
Platforma Node.js mo\u017ce by\u0107 wykorzystana zar\u00f3wno do serwerowego wsparcia prac Web-aplikacji, jak i do tworzenia zwyk\u0142ych klientskich oraz serwerowych program\u00f3w sieciowych. Dla rozszerzenia funkcjonalno\u015bci aplikacji do Node.js przygotowano du\u017c\u0105 kolekcj\u0119 modu\u0142\u00f3w, w kt\u00f3rej mo\u017cna znale\u017a\u0107 modu\u0142y z realizacj\u0105 serwer\u00f3w<\/a> klient\u00f3w HTTP, SMTP, XMPP, DNS, FTP, IMAP, POP3, modu\u0142y do integracji z r\u00f3\u017cnymi frameworkami webowymi, obs\u0142ugiwacze WebSocket i Ajax, konektory do baz danych (MySQL, PostgreSQL, SQLite, MongoDB), silniki szablon\u00f3w, silniki CSS, realizacje algorytm\u00f3w kryptograficznych oraz system\u00f3w autoryzacji (OAuth), parsery XML. <\/p>\n Aby obs\u0142u\u017cy\u0107 du\u017c\u0105 liczb\u0119 r\u00f3wnoleg\u0142ych zapyta\u0144, Node.js wykorzystuje asynchroniczny model uruchamiania kodu oparty na przetwarzaniu zdarze\u0144 w trybie non-blocking oraz definiowaniu callback\u00f3w. Wsparcie dla multiplexing po\u0142\u0105cze\u0144 obejmuje takie metody jak epoll, kqueue, \/dev\/poll i select. Do multiplexing po\u0142\u0105cze\u0144 u\u017cywana jest biblioteka libuv, kt\u00f3ra jest dodatkow\u0105 warstw\u0105 nad libev w systemach Unix oraz nad IOCP w Windows. Do tworzenia puli w\u0105tk\u00f3w (thread pool) wykorzystana jest biblioteka libeio, a do wykonywania zapyta\u0144 DNS w trybie non-blocking zintegrowano c-ares. Wszystkie wywo\u0142ania systemowe, kt\u00f3re powoduj\u0105 blokowanie, s\u0105 realizowane w obr\u0119bie puli w\u0105tk\u00f3w, a nast\u0119pnie, podobnie jak obs\u0142uga sygna\u0142\u00f3w, przekazuj\u0105 wyniki swojej pracy z powrotem przez niestrunn\u0105 rynn\u0119 (pipe). Wykonanie kodu JavaScript zapewnia stworzony przez firm\u0119 Google silnik V8 (dodatkowo Microsoft rozwija wersj\u0119 Node.js z silnikiem Chakra-Core). <\/p>\n Zasadniczo Node.js przypomina frameworki Perl AnyEvent, Ruby Event Machine, Python Twisted oraz implementacj\u0119 zdarze\u0144 w Tcl, ale p\u0119tla obs\u0142ugi zdarze\u0144 (event loop) w Node.js jest ukryta przed deweloperem i przypomina obs\u0142ug\u0119 zdarze\u0144 w aplikacji webowej dzia\u0142aj\u0105cej w przegl\u0105darce. Podczas pisania aplikacji dla Node.js nale\u017cy uwzgl\u0119dni\u0107 specyfik\u0119 programowania opartego na zdarzeniach, na przyk\u0142ad zamiast wykonywa\u0107 «var result = db.query(«select..»);» z oczekiwaniem na zako\u0144czenie pracy i dalszym przetwarzaniem wynik\u00f3w, w Node.js stosuje si\u0119 zasad\u0119 asynchronicznego wykonania, t.j. kod przekszta\u0142ca si\u0119 w «db.query(«select..», function (result) {przetwarzanie wyniku});», przy czym kontrola natychmiast przechodzi do kolejnego kodu, a wynik zapytania b\u0119dzie przetwarzany w miar\u0119 nap\u0142ywu danych. \u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 Node.js 19.0, \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 19 \u043e\u0442\u043d\u0435\u0441\u0451\u043d \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 2023 \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 18, \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 2025 \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 16.0 […]<\/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-105331","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\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\udd47Dost\u0119pna serwerowa platforma JavaScript Node.js 19.0 | ProHoster","description":"Nast\u0105pi\u0142a premiera Node.js 19.0, platformy do uruchamiania aplikacji sieciowych w j\u0119zyku JavaScript. 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\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"