{"id":69424,"date":"2020-02-19T08:45:31","date_gmt":"2020-02-19T05:45:31","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/proekt-deno-razvivaet-zashhishhyonnuyu-javascript-platformu-pohozhuyu-na-node-js"},"modified":"2020-03-03T16:11:16","modified_gmt":"2020-03-03T13:11:16","slug":"proekt-deno-razvivaet-zashhishhyonnuyu-javascript-platformu-pohozhuyu-na-node-js","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/proekt-deno-razvivaet-zashhishhyonnuyu-javascript-platformu-pohozhuyu-na-node-js","title":{"rendered":"\u041f\u0440\u043e\u0435\u043a\u0442 Deno \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442 \u0437\u0430\u0449\u0438\u0449\u0451\u043d\u043d\u0443\u044e JavaScript-\u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0443, \u043f\u043e\u0445\u043e\u0436\u0443\u044e \u043d\u0430 Node.js","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/denoland\/deno\/releases\">Dispon\u00edvel<\/a><\/noindex> lan\u00e7amento do projeto <noindex><a rel=\"nofollow\" href=\"https:\/\/deno.land\/\">Deno 0.33<\/a><\/noindex>, oferecendo uma plataforma semelhante ao Node.js para execu\u00e7\u00e3o isolada de aplicativos em JavaScript e TypeScript, que pode ser usada para executar aplicativos sem depend\u00eancia de navegador, por exemplo, para criar manipuladores que funcionam no servidor. O Deno utiliza o motor JavaScript <noindex><a rel=\"nofollow\" href=\"https:\/\/v8.dev\/\">V8<\/a><\/noindex>, que tamb\u00e9m \u00e9 utilizado no Node.js e em navegadores baseados no projeto Chromium. O c\u00f3digo do projeto <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/denoland\/deno\">\u00e9 distribu\u00eddo<\/a><\/noindex> \u00e9 licenciado sob a MIT. O projeto \u00e9 desenvolvido por Ryan Dahl (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Ryan_Dahl\">Ryan Dahl<\/a><\/noindex>), o criador da plataforma JavaScript Node.js. <\/p>\n<p>Um dos principais objetivos da cria\u00e7\u00e3o de um novo runtime para JavaScript \u00e9 fornecer um ambiente mais seguro. Para aumentar a seguran\u00e7a, a camada de abstra\u00e7\u00e3o em torno do motor V8 foi escrita em Rust, evitando muitas vulnerabilidades que surgem devido ao gerenciamento de mem\u00f3ria de baixo n\u00edvel, como acesso \u00e0 mem\u00f3ria ap\u00f3s a libera\u00e7\u00e3o, desrefer\u00eancia de ponteiros nulos e estouro de buffer. Para processamento de requisi\u00e7\u00f5es em modo n\u00e3o bloqueante, utiliza-se a plataforma <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/tokio-rs\/tokio\">Tokio<\/a><\/noindex>, tamb\u00e9m escrita em Rust, \u00e9 utilizada. O Tokio permite criar aplicativos de alto desempenho baseados em uma arquitetura orientada a eventos, suportando multithreading e o processamento ass\u00edncrono de solicita\u00e7\u00f5es de rede.<\/p>\n<p>Principais <noindex><a rel=\"nofollow\" href=\"https:\/\/deno.land\/std\/manual.md\">Caracter\u00edsticas<\/a><\/noindex> Deno:<\/p>\n<ul>\n<li class=\"l\"> Foco em seguran\u00e7a na configura\u00e7\u00e3o padr\u00e3o. Acesso a arquivos, capacidades de rede e acesso a vari\u00e1veis de ambiente s\u00e3o bloqueados por padr\u00e3o e requerem habilita\u00e7\u00e3o expl\u00edcita;\n<li class=\"l\"> Suporte embutido para TypeScript al\u00e9m do JavaScript;\n<li class=\"l\"> O Runtime \u00e9 fornecido na forma de um \u00fanico arquivo execut\u00e1vel aut\u00f4nomo (deno). Para executar aplicativos usando o Deno, \u00e9 suficiente <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/denoland\/deno\/releases\">baixar<\/a><\/noindex> para sua plataforma, um \u00fanico arquivo execut\u00e1vel, com cerca de 10 MB, sem depend\u00eancias externas e que n\u00e3o requer instala\u00e7\u00e3o especial no sistema;\n<li class=\"l\"> Ao executar o programa, assim como para carregar m\u00f3dulos, \u00e9 poss\u00edvel usar endere\u00e7amento via URL. Por exemplo, para executar o programa welcome.js, pode-se usar o comando deno https:\/\/deno.land\/std\/examples\/welcome.js. O c\u00f3digo de recursos externos \u00e9 carregado e armazenado em cache no sistema local, mas nunca \u00e9 atualizado automaticamente (para atualiz\u00e1-lo, \u00e9 necess\u00e1rio iniciar explicitamente o aplicativo com a flag --reload);\n<li class=\"l\"> Processamento eficiente de solicita\u00e7\u00f5es de rede via HTTP, a plataforma \u00e9 projetada para criar aplicativos de rede de alto desempenho;\n<li class=\"l\"> Capacidade de criar aplicativos web universais que podem ser executados tanto no Deno quanto em navegadores web convencionais;\n<li class=\"l\"> Al\u00e9m do runtime, a plataforma Deno tamb\u00e9m atua como um gerenciador de pacotes e permite que o c\u00f3digo acesse m\u00f3dulos via URL. Por exemplo, para carregar um m\u00f3dulo, pode-se especificar no c\u00f3digo import * as log from https:\/\/deno.land\/std\/log\/mod.ts. Os arquivos carregados de servidores externos via URL s\u00e3o armazenados em cache. A vincula\u00e7\u00e3o \u00e0s vers\u00f5es dos m\u00f3dulos \u00e9 determinada pela indica\u00e7\u00e3o dos n\u00fameros das vers\u00f5es dentro da URL, por exemplo, https:\/\/unpkg.com\/liltest@0.0.5\/dist\/liltest.js;\n<li class=\"l\"> O pacote inclui um sistema de inspe\u00e7\u00e3o de depend\u00eancias (comando deno info) e uma ferramenta para formata\u00e7\u00e3o de c\u00f3digo (deno fmt).\n<li class=\"l\"> Para desenvolvedores de aplicativos <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/denoland\/deno\/tree\/master\/std\">foi oferecido<\/a><\/noindex> um conjunto de m\u00f3dulos padr\u00e3o que passaram por auditoria adicional e verifica\u00e7\u00e3o de compatibilidade;\n<li class=\"l\"> Todos os scripts da aplica\u00e7\u00e3o podem ser combinados em um \u00fanico arquivo JavaScript.\n<\/ul>\n<p> Diferen\u00e7as em rela\u00e7\u00e3o ao Node.js:<\/p>\n<ul>\n<li class=\"l\"> O Deno n\u00e3o utiliza o gerenciador de pacotes npm<br \/>\n e n\u00e3o est\u00e1 vinculado a reposit\u00f3rios, a endere\u00e7amento de m\u00f3dulos \u00e9 realizado via URL ou por caminho de arquivo, e os pr\u00f3prios m\u00f3dulos podem ser hospedados em qualquer site;<\/p>\n<li class=\"l\"> No Deno, n\u00e3o se utiliza package.json para a defini\u00e7\u00e3o de m\u00f3dulos;\n<li class=\"l\"> Diferen\u00e7a de API, todas as opera\u00e7\u00f5es ass\u00edncronas no Deno retornam promessas;\n<li class=\"l\"> O Deno requer a defini\u00e7\u00e3o expl\u00edcita de todas as permiss\u00f5es necess\u00e1rias para arquivos, rede e vari\u00e1veis de ambiente;\n<li class=\"l\"> Todos os erros n\u00e3o acompanhados por manipuladores levam \u00e0 finaliza\u00e7\u00e3o da execu\u00e7\u00e3o da aplica\u00e7\u00e3o;\n<li class=\"l\"> No Deno, utiliza-se o sistema de m\u00f3dulos ECMAScript, e o require() n\u00e3o \u00e9 suportado.\n<\/ul>\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=52387\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Deno 0.33, \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u0433\u043e \u043f\u043e\u0445\u043e\u0436\u0443\u044e \u043d\u0430 Node.js \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0443 \u0434\u043b\u044f \u043e\u0431\u043e\u0441\u043e\u0431\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 JavaScript \u0438 TypeScript, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0430 \u0434\u043b\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0431\u0435\u0437 \u043f\u0440\u0438\u0432\u044f\u0437\u043a\u0438 \u043a \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0443, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432, \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0445 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435. \u0412 Deno \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f JavaScript-\u0434\u0432\u0438\u0436\u043e\u043a V8, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0442\u0430\u043a\u0436\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u0432 Node.js \u0438 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430\u0445 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Chromium. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 [&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-69424","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Deno 0.33, \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u0433\u043e \u043f\u043e\u0445\u043e\u0436\u0443\u044e \u043d\u0430.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" 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