{"id":101702,"date":"2021-10-19T22:23:37","date_gmt":"2021-10-19T20:23:37","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-servernoj-javascript-platformy-node-js-17-0"},"modified":"2021-10-19T22:23:37","modified_gmt":"2021-10-19T20:23:37","slug":"vypusk-servernoj-javascript-platformy-node-js-17-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/vypusk-servernoj-javascript-platformy-node-js-17-0","title":{"rendered":"Uscita della piattaforma server JavaScript Node.js 17.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00c8 stata rilasciata la versione 17.0 di Node.js, la piattaforma per l'esecuzione di applicazioni web in JavaScript. Node.js 17.0 appartiene al ramo con supporto standard, gli aggiornamenti per il quale saranno rilasciati fino a giugno 2022. Nei prossimi giorni si concluder\u00e0 la stabilizzazione del ramo Node.js 16, che acquisir\u00e0 lo status di LTS e sar\u00e0 supportato fino ad aprile 2024. Il supporto per il precedente ramo LTS Node.js 14.0 continuer\u00e0 fino ad aprile 2023, mentre per il ramo LTS 12.0 terminer\u00e0 ad aprile 2022.       <\/p>\n<p>Miglioramenti principali:  <\/p>\n<ul>\n<li class=\"l\"> Il motore V8 \u00e8 stato aggiornato alla versione 9.5.\n<li class=\"l\"> \u041f\u0440\u043e\u0434\u043e\u043b\u0436\u0435\u043d\u0430 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u043e\u0432 \u0431\u0430\u0437\u043e\u0432\u043e\u0433\u043e API, \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0430 \u0430\u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u044b\u0445 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439 Promise. \u0412 \u0434\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043a \u0440\u0430\u043d\u0435\u0435 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u043c API Timers Promises \u0438 Streams Promises \u0432 Node.js 17.0 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d API Readline Promise \u0434\u043b\u044f \u043f\u043e\u0441\u0442\u0440\u043e\u0447\u043d\u043e\u0433\u043e \u0447\u0442\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043c\u043e\u0434\u0443\u043b\u044f readline.       import * as readline from &#8216;node:readline\/promises&#8217;;     import { stdin as input, stdout as output } from &#8216;process&#8217;;       const rl = readline.createInterface({ input, output });       const answer = await rl.question(&#8216;What do you think of Node.js?&#8217;);       console.log(&#8216;Thank you for your valuable feedback: ${answer}&#8217;);       rl.close();\n<li class=\"l\"> La libreria OpenSSL fornita \u00e8 stata aggiornata alla versione 3.0 (utilizzato un fork quictls\/openssl con supporto attivato per il protocollo QUIC).\n<li class=\"l\"> \u00c8 garantita l'uscita della versione di Node.js negli stack trace emessi in caso di errori fatali che portano alla chiusura dell'applicazione.      <\/ul>\n<p>Inoltre, si possono segnalare la risoluzione di due vulnerabilit\u00e0 nelle versioni attuali di Node.js (CVE-2021-22959, CVE-2021-22960), che possono permettere attacchi di tipo &#171;HTTP Request Smuggling&#187; (HRS), consentendo tramite l'invio di richieste client formulate in modo specifico di interferire con il contenuto delle richieste di altri utenti, elaborate nella stessa sequenza tra frontend e backend (ad esempio, \u00e8 possibile inserire codice JavaScript dannoso nella sessione di un altro utente). I dettagli saranno rivelati in seguito, mentre per ora \u00e8 noto solo che i problemi sono causati da una gestione errata degli spazi tra il nome dell'intestazione HTTP e i due punti, nonch\u00e9 da un diverso trattamento dei caratteri di ritorno e di nuova linea nel blocco di parametri utilizzato per trasmettere il corpo della richiesta in modalit\u00e0 &#171;chunked&#187;.        <\/p>\n<p>Ricordiamo che la piattaforma Node.js pu\u00f2 essere utilizzata sia per il supporto server di applicazioni Web, sia per la creazione di normali programmi client e server. Per ampliare la funzionalit\u00e0 delle applicazioni Node.js \u00e8 stata preparata una vasta collezione di moduli, in cui \u00e8 possibile trovare moduli con implementazione.  <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1614\">server<\/a> e client HTTP, SMTP, XMPP, DNS, FTP, IMAP, POP3, moduli per l'integrazione con vari framework web, gestori WebSocket e Ajax, connettori per database (MySQL, PostgreSQL, SQLite, MongoDB), motori di templating, motori CSS, implementazioni di algoritmi crittografici e sistemi di autorizzazione (OAuth), parser XML.    <\/p>\n<p> Per gestire un elevato numero di richieste parallele, Node.js utilizza un modello asincrono di esecuzione del codice, basato su un'architettura ad eventi in modalit\u00e0 non bloccante e sulla definizione di callback. Per il multiplexing delle connessioni, vengono supportati metodi come epoll, kqueue, \/dev\/poll e select. La libreria libuv, che funge da interfaccia sopra libev nei sistemi Unix e IOCP in Windows, viene utilizzata per il multiplexing delle connessioni. La libreria libeio \u00e8 impiegata per creare un pool di thread, mentre c-ares \u00e8 integrato per eseguire richieste DNS in modalit\u00e0 non bloccante. Tutti i syscalls bloccanti sono eseguiti all'interno del pool di thread e, come gli handler dei segnali, restituiscono i risultati delle loro operazioni tramite una pipe non nominata. L'esecuzione del codice JavaScript \u00e8 garantita dall'utilizzo del motore V8 sviluppato da Google (in aggiunta, Microsoft sviluppa una versione di Node.js con il motore Chakra-Core).        <\/p>\n<p>Node.js \u00e8 fondamentalmente simile ai framework Perl AnyEvent, Ruby Event Machine, Python Twisted e all'implementazione degli eventi in Tcl, ma il ciclo di eventi (event loop) in Node.js \u00e8 nascosto allo sviluppatore e ricorda la gestione degli eventi in un'app web che gira nel browser. Quando si scrivono applicazioni per Node.js, \u00e8 necessario considerare le caratteristiche della programmazione orientata agli eventi, ad esempio, invece di eseguire &#171;var result = db.query(&#171;select..&#187;);&#187; aspettando il completamento e successivamente elaborando i risultati, Node.js utilizza il principio dell'esecuzione asincrona, cio\u00e8 il codice viene trasformato in &#171;db.query(&#171;select..&#187;, function (result) {elaborazione del risultato});&#187;, dove il controllo passa immediatamente al codice successivo, e il risultato della query verr\u00e0 elaborato man mano che i dati arrivano.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=55997\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\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 [&hellip;]<\/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-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\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. 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