{"id":6185,"date":"2015-03-03T19:00:00","date_gmt":"2015-03-03T22:00:00","guid":{"rendered":"https:\/\/www.psafe.com\/blog\/http2-internet-mais-rapida"},"modified":"2015-03-09T17:48:31","modified_gmt":"2015-03-09T17:48:31","slug":"http2-internet-mais-rapida","status":"publish","type":"post","link":"https:\/\/www.psafe.com\/blog\/http2-internet-mais-rapida\/","title":{"rendered":"HTTP\/2: Internet mais r\u00e1pida"},"content":{"rendered":"

HTTP \u00e9 o protocolo pelo qual os navegadores se comunicam com os servidores web para liberar o acesso ao site<\/a>. Ele existe desde que a internet foi criada, em 1991, com somente uma atualiza\u00e7\u00e3o em 1999. Este m\u00eas foi anunciado o lan\u00e7amento do HTTP\/2, a primeira grande atualiza\u00e7\u00e3o em 15 anos.<\/p>\n

HTTP 1.1<\/strong><\/h2>\n

A vers\u00e3o que utilizamos (HTTP 1.1) foi criada em 1999 e \u00e9 um protocolo simples criado para uma internet simples, mas a internet sofreu muitas mudan\u00e7as nos \u00faltimos anos, como uso de Java, Flash, An\u00fancios e outros.<\/p>\n

Os sites de hoje geram solicita\u00e7\u00e3o de textos, imagens, v\u00eddeos, an\u00fancios e outros. Tudo isso aumenta o tempo de carregamento da p\u00e1gina, uma vez que o HTTP 1.1 s\u00f3 suporta uma solicita\u00e7\u00e3o por vez. Essa lentid\u00e3o \u00e9 mais percebida quando se navega por dispositivos m\u00f3veis.<\/p>\n

SPDY<\/strong><\/h2>\n

O SPDY (se pronuncia \u201cispidi\u201d) \u00e9 um protocolo desenvolvido pelo Google em 2009 para lidar com as 40 mil pesquisas por segundo que s\u00e3o realizadas todos os dias. Ele otimiza o HTTP e foi criado para uso interno, mas logo outros sites que trabalham grande volume de dados, como Twitter, Facebook e WordPress, implementaram-no. Recentemente, o Google anunciou que deixar\u00e1 de usar o PSDY em favor do HTTP\/2, com lan\u00e7amento em breve.<\/p>\n

HTTP\/2 <\/strong><\/h2>\n

O SPDY chamou a aten\u00e7\u00e3o do IETF (Internet Engineering Task Force) que decidiu, em 2012, utiliz\u00e1-lo como base do HTTP\/2. O IETF \u00e9 um grupo de trabalho aberto que desenvolve e promove padr\u00f5es para a internet h\u00e1 mais de 30 anos.<\/p>\n

A atualiza\u00e7\u00e3o \u00e9 um protocolo bin\u00e1rio que permite uma transmiss\u00e3o mais r\u00e1pida e mais compacta. Enquanto seu antecessor tem 4 diferentes formas de tratar a mensagem, o HTTP\/2 tem somente 1. Com ele, a experi\u00eancia no navegador ser\u00e1 melhor, com um tempo de resposta menor.<\/p>\n

O protocolo permite cabe\u00e7alhos comprimidos, transmiss\u00e3o simult\u00e2nea de sinais atrav\u00e9s de um \u00fanico canal e defini\u00e7\u00e3o de prioridades, al\u00e9m ser mais seguro. Ele tamb\u00e9m melhora a experi\u00eancia de navega\u00e7\u00e3o em dispositivos m\u00f3veis.<\/p>\n

As \u00faltimas vers\u00f5es dos navegadores mais utilizados (Firefox v36, Chrome v40 e Explore v11) j\u00e1 suportam o HTTP\/2. No Chrome e no Firefox foi decidido que o HTTP\/2 s\u00f3 ser\u00e1 utilizado em conex\u00f5es criptografadas<\/a> (SSL), dando mais for\u00e7a \u00e0 iniciativa Let\u2019s Encrypt (Vamos Criptografar!).<\/p>\n","protected":false},"excerpt":{"rendered":"

Primeira atualiza\u00e7\u00e3o em 15 anos deixar\u00e1 a experi\u00eancia de navegar na internet mais r\u00e1pida e segura.<\/p>\n","protected":false},"author":114,"featured_media":8243,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-6185","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciberseguranca"],"yoast_head":"\nHTTP\/2: Internet mais r\u00e1pida<\/title>\n<meta name=\"description\" content=\"Primeira atualiza\u00e7\u00e3o em 15 anos deixar\u00e1 a experi\u00eancia de navegar na internet mais r\u00e1pida e segura.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.psafe.com\/blog\/http2-internet-mais-rapida\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HTTP\/2: Internet mais r\u00e1pida\" \/>\n<meta property=\"og:description\" content=\"Primeira atualiza\u00e7\u00e3o em 15 anos deixar\u00e1 a experi\u00eancia de navegar na internet mais r\u00e1pida e segura.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.psafe.com\/blog\/http2-internet-mais-rapida\/\" \/>\n<meta property=\"og:site_name\" content=\"dfndr blog - 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