{"id":39242,"date":"2019-10-31T22:28:38","date_gmt":"2019-10-31T19:28:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vypusk-servernoj-javascript-platformy-node-js-13-0\/"},"modified":"2019-10-31T22:28:38","modified_gmt":"2019-10-31T19:28:38","slug":"vypusk-servernoj-javascript-platformy-node-js-13-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/vypusk-servernoj-javascript-platformy-node-js-13-0","title":{"rendered":"Uscita della piattaforma server JavaScript Node.js 13.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\/en\/blog\/release\/v13.0.0\/\">Disponibile<\/a><\/noindex> rilascio <noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\">Node.js 13.0<\/a><\/noindex>, piattaforma per l'esecuzione di applicazioni di rete in JavaScript. La stabilizzazione della precedente versione Node.js 12.x \u00e8 stata completata, ora classificata come rilascio con supporto a lungo termine, con aggiornamenti forniti per 4 anni. Il supporto per la versione LTS precedente, Node.js 10.0, durer\u00e0 fino ad aprile 2021, mentre per la versione LTS di due generazioni fa, 8.0, fino a gennaio 2020.<\/p>\n<p>Principali <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/@nodejs\/node-js-12-to-lts-and-node-js-13-is-here-e28d6a4a2bd\">miglioramenti<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\"> Il motore V8 \u00e8 stato aggiornato alla versione <noindex><a rel=\"nofollow\" href=\"https:\/\/v8.dev\/\">7.8<\/a><\/noindex>, che introduce nuovi metodi di ottimizzazione delle prestazioni, migliora la destrutturazione degli oggetti, riduce il consumo di memoria e accorcia il tempo di preparazione per l'esecuzione di WebAssembly;\n<li class=\"l\"> La piena supporto all'internazionalizzazione e a Unicode \u00e8 abilitata per impostazione predefinita, basata su librerie <noindex><a rel=\"nofollow\" href=\"http:\/\/site.icu-project.org\/\">ICU<\/a><\/noindex> (International Components for Unicode), consentendo agli sviluppatori di scrivere codice <noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\/api\/intl.html#intl_providing_icu_data_at_runtime\">che supporti<\/a><\/noindex> la gestione di diverse lingue e localizzazioni. Il modulo full-icu \u00e8 ora installato per impostazione predefinita;\n<li class=\"l\"> API stabilizzato <noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\/api\/worker_threads.html\">Workers Threads<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/@Trott\/using-worker-threads-in-node-js-80494136dbb6\">che consente<\/a><\/noindex> creare cicli di eventi multi-thread (event loop). L'implementazione si basa sul modulo worker_threads, che consente l'esecuzione di codice JavaScript su pi\u00f9 thread paralleli. Anche il supporto stabile per le API Workers Threads \u00e8 stato retroportato nella versione LTS di Node.js 12.x;\n<li class=\"l\"> Le esigenze della piattaforma sono aumentate. Ora \u00e8 necessaria almeno macOS 10.11 (\u00e8 richiesto Xcode 10), AIX 7.2, Ubuntu 16.04, Debian 9, EL 7, Alpine 3.8, Windows 7\/2008; <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/nodejs\/node\/blob\/master\/BUILDING.md#platform-list\">\u00e8 richiesto<\/a><\/noindex> Migliorato il supporto per Python 3. Se sul sistema sono presenti sia Python 2 che Python 3, continua a essere utilizzato Python 2, ma \u00e8 stata aggiunta la possibilit\u00e0 di compilare solo con Python 3;\n<li class=\"l\"> Rimossa la vecchia implementazione del parser HTTP (\u201c\u2014http-parser=legacy\u201d). Rimosse o rese obsolete chiamate e propriet\u00e0 come FSWatcher.prototype.start(), ChildProcess._channel, il metodo open() negli oggetti ReadStream e WriteStream, request.connection, response.connection, module.createRequireFromPath();\n<li class=\"l\"> \u0423\u0434\u0430\u043b\u0435\u043d\u0430 \u0441\u0442\u0430\u0440\u0430\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f HTTP-\u043f\u0430\u0440\u0441\u0435\u0440\u0430 (&#171;&#8212;http-parser=legacy&#187;). \u0423\u0434\u0430\u043b\u0435\u043d\u044b \u0438\u043b\u0438 \u043f\u0435\u0440\u0435\u0432\u0435\u0434\u0435\u043d\u044b \u0432 \u0440\u0430\u0437\u0440\u044f\u0434 \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0438\u0445 \u0432\u044b\u0437\u043e\u0432\u044b \u0438 \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430  FSWatcher.prototype.start(), ChildProcess._channel, \u043c\u0435\u0442\u043e\u0434 open() \u0432 \u043e\u0431\u044a\u0435\u043a\u0442\u0430\u0445 ReadStream \u0438 WriteStream,  request.connection, response.connection, module.createRequireFromPath();\n<li class=\"l\"> l'aggiornamento 13.0.1, che ha risolto immediatamente diversi bug. Tra cui \u00e8 stato risolto il problema di visualizzazione dell'avviso di utilizzo di una versione non supportata in npm 6.12.0. <noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\/en\/blog\/release\/v13.0.1\/\">\u00e8 stata rilasciata<\/a><\/noindex> Ricordiamo che la piattaforma Node.js pu\u00f2 essere utilizzata sia per il supporto server delle applicazioni web sia per creare normali programmi di rete client e server. Per ampliare le funzionalit\u00e0 delle applicazioni Node.js \u00e8 stata preparata una vasta\n<\/ul>\n<p>collezione di moduli <noindex><a rel=\"nofollow\" href=\"https:\/\/www.npmjs.com\/\">\u043a\u043e\u043b\u043b\u0435\u043a\u0446\u0438\u044f \u043c\u043e\u0434\u0443\u043b\u0435\u0439<\/a><\/noindex>, in cui \u00e8 possibile trovare moduli per l'implementazione di server 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 template, CSS, implementazioni di algoritmi crittografici e sistemi di autorizzazione (OAuth), parser XML.<\/p>\n<p> Per garantire la gestione di un gran numero di richieste parallele, Node.js utilizza un modello di esecuzione del codice asincrono, basato sulla gestione degli eventi in modalit\u00e0 non bloccante e sulla definizione di gestori di callback. Sono supportati metodi di multiplexing delle connessioni come epoll, kqueue, \/dev\/poll e select. Per il multiplexing delle connessioni viene utilizzata la libreria <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/libuv\/libuv\">libuv<\/a><\/noindex>, che \u00e8 un'estensione di <noindex><a rel=\"nofollow\" href=\"http:\/\/software.schmorp.de\/pkg\/libev.html\">libev<\/a><\/noindex> nei sistemi Unix e di IOCP in Windows. Per creare un pool di thread viene utilizzata la libreria <noindex><a rel=\"nofollow\" href=\"http:\/\/software.schmorp.de\/pkg\/libeio.html\">libeio<\/a><\/noindex>, per eseguire richieste DNS in modalit\u00e0 non bloccante \u00e8 integrato <noindex><a rel=\"nofollow\" href=\"http:\/\/c-ares.haxx.se\/\">c-ares<\/a><\/noindex>. Tutti i sistemi di chiamata che causano blocchi vengono eseguiti all'interno di un pool di thread e, come i gestori di segnali, restituiscono il risultato del loro lavoro attraverso un canale anonimo (pipe). L'esecuzione del codice JavaScript \u00e8 garantita dall'implementazione dell'engine sviluppato da Google. <noindex><a rel=\"nofollow\" href=\"http:\/\/code.google.com\/p\/v8\/\">V8<\/a><\/noindex> (in aggiunta, Microsoft sviluppa una variante di Node.js con l'engine Chakra-Core).  <\/p>\n<p>Essenzialmente, Node.js \u00e8 simile ai framework <noindex><a rel=\"nofollow\" href=\"http:\/\/search.cpan.org\/dist\/AnyEvent\/\">Perl AnyEvent<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/eventmachine\/eventmachine\">Ruby Event Machine<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"http:\/\/twistedmatrix.com\/\">Python Twisted<\/a><\/noindex> e <noindex><a rel=\"nofollow\" href=\"http:\/\/wiki.tcl.tk\/1527\">implementazione<\/a><\/noindex> \u0441\u043e\u0431\u044b\u0442\u0438\u0439 \u0432 Tcl, \u043d\u043e \u0446\u0438\u043a\u043b \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0441\u043e\u0431\u044b\u0442\u0438\u0439 (event loop) \u0432 Node.js \u0441\u043a\u0440\u044b\u0442 \u043e\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430 \u0438 \u043d\u0430\u043f\u043e\u043c\u0438\u043d\u0430\u0435\u0442 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0443 \u0441\u043e\u0431\u044b\u0442\u0438\u0439 \u0432 web-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0438, \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0435\u043c \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435. \u041f\u0440\u0438 \u043d\u0430\u043f\u0438\u0441\u0430\u043d\u0438\u0438 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0434\u043b\u044f node.js \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0443\u0447\u0438\u0442\u044b\u0432\u0430\u0442\u044c \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0443 \u0441\u043e\u0431\u044b\u0442\u0438\u0439\u043d\u043e-\u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432\u043c\u0435\u0441\u0442\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f &#171;var result = db.query(&#171;select..&#187;);&#187; \u0441 \u043e\u0436\u0438\u0434\u0430\u043d\u0438\u0435\u043c \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0438 \u043f\u043e\u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0439 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u043e\u0439 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u043e\u0432, \u0432 Node.js \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442 \u043f\u0440\u0438\u043d\u0446\u0438\u043f \u0430\u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f, \u0442.\u0435. \u043a\u043e\u0434 \u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0432 &#171;db.query(&#171;select..&#187;, function (result) {\u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0430});&#187;, \u043f\u0440\u0438 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043c\u0433\u043d\u043e\u0432\u0435\u043d\u043d\u043e \u043f\u0435\u0440\u0435\u0439\u0434\u0451\u0442 \u043a \u0434\u0430\u043b\u044c\u043d\u0435\u0439\u0448\u0435\u043c\u0443 \u043a\u043e\u0434\u0443, \u0430 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0437\u0430\u043f\u0440\u043e\u0441\u0430 \u0431\u0443\u0434\u0435\u0442 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0430\u043d \u043f\u043e \u043c\u0435\u0440\u0435 \u043f\u043e\u0441\u0442\u0443\u043f\u043b\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445. . <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51741\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0435\u043b\u0438\u0437 Node.js 13.0, \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. \u041e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0430 \u0441\u0442\u0430\u0431\u0438\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u043f\u0440\u043e\u0448\u043b\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 Node.js 12.x, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u0435\u0440\u0435\u0432\u0435\u0434\u0435\u043d\u0430 \u0432 \u043a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u044e \u0432\u044b\u043f\u0443\u0441\u043a\u043e\u0432 \u0441 \u0434\u043b\u0438\u0442\u0435\u043b\u044c\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\u044b\u0445 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u044e\u0442\u0441\u044f \u0432 \u0442\u0435\u0447\u0435\u043d\u0438\u0435 4 \u043b\u0435\u0442. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043f\u0440\u043e\u0448\u043b\u043e\u0439 LTS-\u0432\u0435\u0442\u043a\u0438 Node.js 10.0 \u043f\u0440\u043e\u0434\u043b\u0438\u0442\u0441\u044f \u0434\u043e \u0430\u043f\u0440\u0435\u043b\u044f 2021 \u0433\u043e\u0434\u0430, \u0430 \u043f\u043e\u0437\u0430\u043f\u0440\u043e\u0448\u043b\u043e\u0439 LTS-\u0432\u0435\u0442\u043a\u0438 8.0 \u0434\u043e \u044f\u043d\u0432\u0430\u0440\u044f 2020 \u0433\u043e\u0434\u0430. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 [&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-39242","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0435\u043b\u0438\u0437 Node.js 13.0, \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 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