{"id":607,"date":"2015-03-17T18:13:29","date_gmt":"2015-03-17T21:13:29","guid":{"rendered":"http:\/\/www.valuehost.com.br\/blog\/?p=607"},"modified":"2020-04-07T22:46:37","modified_gmt":"2020-04-08T01:46:37","slug":"compressao-de-dados-gzip-zlib-e-deflate","status":"publish","type":"post","link":"https:\/\/www.valuehost.com.br\/blog\/compressao-de-dados-gzip-zlib-e-deflate\/","title":{"rendered":"Compress\u00e3o de dados: gzip, zlib e deflate"},"content":{"rendered":"<p>Utilizar a compress\u00e3o de dados \u00e9 uma excelente pr\u00e1tica de otimiza\u00e7\u00e3o de p\u00e1ginas web, al\u00e9m de ser muito f\u00e1cil de ser implementada . O processo \u00e9 bem simples: o servidor comprime todo o HTML, CSS e Javascript antes de enviar para o navegador, dessa forma a transfer\u00eancia dos arquivos acontece muito mais r\u00e1pida.<\/p>\n<p>Pesquisando sobre o assunto, me deparei com esses tr\u00eas nomes: gzip, zlib e deflate. What? Qual usar?<\/p>\n<p><!--more--><\/p>\n<p><strong>Deflate<\/strong> \u2013 \u00e9 um algoritmo de compress\u00e3o de dados.<\/p>\n<p><strong>Gzip<\/strong> \u2013 \u00e9 um programa de compress\u00e3o de dados para sistemas baseados em Unix. Utiliza o algoritmo deflate.<\/p>\n<p><strong>Zlib<\/strong> \u2013 \u00e9 uma biblioteca multiplataforma de compress\u00e3o de dados, criada para popularizar o algoritmo deflate.<\/p>\n<p>Resumindo, tanto faz se voc\u00ea vai usar o Gzip ou o Zlib, j\u00e1 que o algoritmo de compacta\u00e7\u00e3o \u00e9 o mesmo. &nbsp;O importante \u00e9 ativar a compress\u00e3o para melhorar a performance do seu site, diminuindo cerca de 70% do tr\u00e1fego total. Geralmente eu dou prefer\u00eancia para o zlib, pois acho mais r\u00e1pido de habilitar (veja abaixo). Se ele n\u00e3o estiver dispon\u00edvel ent\u00e3o eu habilito o gzip.<\/p>\n<h2>Ativando o Zlib<\/h2>\n<p>Para usar o Zlib voc\u00ea precisa verificar se a biblioteca est\u00e1 ativa no servidor atrav\u00e9s da fun\u00e7\u00e3o <strong>phpinfo()<\/strong>.<\/p>\n<p><a href=\"https:\/\/www.valuehost.com.br\/blog\/wp-content\/uploads\/2015\/03\/zlib2.png\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-637\" src=\"https:\/\/www.valuehost.com.br\/blog\/wp-content\/uploads\/2015\/03\/zlib2.png\" alt=\"zlib2\" width=\"620\" height=\"165\" srcset=\"https:\/\/www.valuehost.com.br\/blog\/wp-content\/uploads\/2015\/03\/zlib2.png 620w, https:\/\/www.valuehost.com.br\/blog\/wp-content\/uploads\/2015\/03\/zlib2-300x80.png 300w\" sizes=\"(max-width: 620px) 100vw, 620px\" \/><\/a><\/p>\n<p>Se estiver, basta adicionar essas linhas de c\u00f3digo no header do seu site antes do html.<\/p>\n<p>[code lang=&#8221;php&#8221;]<br \/>\n&amp;amp;lt;?php<br \/>\n\/** Coloque essas duas linhas no cabe\u00e7alho do site **\/<br \/>\nini_set(&#8216;zlib.output_compression&#8217;,&#8217;On&#8217;);<br \/>\nini_set(&#8216;zlib.output_compression_level&#8217;,&#8217;1&#8242;);<br \/>\n?&amp;amp;gt;<br \/>\n&amp;amp;lt;!doctype html&amp;amp;gt;<br \/>\n&amp;amp;lt;html dir=&amp;amp;quot;ltr&amp;amp;quot; lang=&amp;amp;quot;pt-BR&amp;amp;quot;&amp;amp;gt;<br \/>\n&amp;amp;lt;head&amp;amp;gt;<br \/>\n&amp;amp;lt;meta charset=&amp;amp;quot;UTF-8&amp;amp;quot;&amp;amp;gt;<br \/>\n&amp;amp;lt;meta name=&amp;amp;quot;viewport&amp;amp;quot; content=&amp;amp;quot;width=device-width, initial-scale=1.0&amp;amp;quot;&amp;amp;gt;<br \/>\n&amp;amp;lt;title&amp;amp;gt;Comprenss\u00e3o de dados: gzip, zlib e deflate&amp;amp;lt;\/title&amp;amp;gt;<br \/>\n[\/code]<\/p>\n<h2 lang=\"php\">Ativando o Gzip<\/h2>\n<p>Caso voc\u00ea prefira usar o Gzip&nbsp; ou esteja impedido de usar o Zlib, em servidores <strong>linux<\/strong> \u00e9 poss\u00edvel ativ\u00e1-lo atrav\u00e9s do arquivo <strong>.htaccess <\/strong>adicionando o c\u00f3digo abaixo:<\/p>\n<p>[code lang=&#8221;xml&#8221;]<br \/>\n&amp;amp;lt;IfModule mod_deflate.c&amp;amp;gt;<br \/>\n&amp;amp;lt;IfModule mod_setenvif.c&amp;amp;gt;<br \/>\n&amp;amp;lt;IfModule mod_headers.c&amp;amp;gt;<br \/>\nSetEnvIfNoCase ^(Accept-EncodXng|X-cept-Encoding|X{15}|~{15}|-{15})$ ^((gzip|deflate)\\s*,?\\s*)+|[X~-]{4,13}$ HAVE_Accept-Encoding<br \/>\nRequestHeader append Accept-Encoding &amp;amp;quot;gzip,deflate&amp;amp;quot; env=HAVE_Accept-Encoding<br \/>\n&amp;amp;lt;\/IfModule&amp;amp;gt;<br \/>\n&amp;amp;lt;\/IfModule&amp;amp;gt;<br \/>\n&amp;amp;lt;IfModule filter_module&amp;amp;gt;<br \/>\nFilterDeclare COMPRESS<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $text\/html<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $text\/css<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $text\/plain<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $text\/xml<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $text\/x-component<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $application\/javascript<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $application\/json<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $application\/xml<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $application\/xhtml+xml<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $application\/rss+xml<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $application\/atom+xml<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $application\/vnd.ms-fontobject<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $image\/svg+xml<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $image\/x-icon<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $application\/x-font-ttf<br \/>\nFilterProvider COMPRESS DEFLATE resp=Content-Type $font\/opentype<br \/>\nFilterChain COMPRESS<br \/>\nFilterProtocol COMPRESS DEFLATE change=yes;byteranges=no<br \/>\n&amp;amp;lt;\/IfModule&amp;amp;gt;<br \/>\n&amp;amp;lt;IfModule !mod_filter.c&amp;amp;gt;<br \/>\nAddOutputFilterByType DEFLATE text\/html text\/plain text\/css application\/json<br \/>\nAddOutputFilterByType DEFLATE application\/javascript<br \/>\nAddOutputFilterByType DEFLATE text\/xml application\/xml text\/x-component<br \/>\nAddOutputFilterByType DEFLATE application\/xhtml+xml application\/rss+xml application\/atom+xml<br \/>\nAddOutputFilterByType DEFLATE image\/x-icon image\/svg+xml application\/vnd.ms-fontobject application\/x-font-ttf font\/opentype<br \/>\n&amp;amp;lt;\/IfModule&amp;amp;gt;<br \/>\n&amp;amp;lt;\/IfModule&amp;amp;gt;<br \/>\n[\/code]<\/p>\n<h2>Comprovando o resultado<\/h2>\n<p>Com uma ferramenta disponibilizada pelo site Port80&nbsp;\u00e9 poss\u00edvel verificar o status da compress\u00e3o, comparar o tamanho do arquivo original com o do arquivo comprimido e ter uma estimativa de tempo de carregamento da p\u00e1gina. Veja o teste que fiz:<\/p>\n<p><a href=\"https:\/\/www.valuehost.com.br\/blog\/wp-content\/uploads\/2015\/03\/verifica-compressao-gzip1.jpg\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-631\" src=\"https:\/\/www.valuehost.com.br\/blog\/wp-content\/uploads\/2015\/03\/verifica-compressao-gzip1.jpg\" alt=\"verifica-compressao-gzip1\" width=\"477\" height=\"522\" srcset=\"https:\/\/www.valuehost.com.br\/blog\/wp-content\/uploads\/2015\/03\/verifica-compressao-gzip1.jpg 477w, https:\/\/www.valuehost.com.br\/blog\/wp-content\/uploads\/2015\/03\/verifica-compressao-gzip1-274x300.jpg 274w\" sizes=\"(max-width: 477px) 100vw, 477px\" \/><\/a><\/p>\n<p>Basta adicionar a url do seu site no campo <em>compression check<\/em> e clicar em <em>check<\/em> para fazer o teste com o seu site.<\/p>\n<p>http:\/\/www.port80software.com\/support\/p80tools.asp<\/p>\n<h2>Refer\u00eancias<\/h2>\n<p><a title=\"Gzip\" href=\"http:\/\/www.gzip.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">Gzip.org<\/a><\/p>\n<p><a title=\"Zlib\" href=\"http:\/\/zlib.net\/\" target=\"_blank\" rel=\"noopener noreferrer\">Zlib.net<\/a><\/p>\n<p><a href=\"http:\/\/pt.wikipedia.org\/wiki\/Zlib\" target=\"_blank\" rel=\"noopener noreferrer\">Wikipedia.org\/Zlib<\/a><\/p>\n<p><a href=\"http:\/\/pt.wikipedia.org\/wiki\/Gzip\" target=\"_blank\" rel=\"noopener noreferrer\">Wikipedia.org\/Gzip<\/a><\/p>\n<p>Template de htacess modelo simples focado em seo<\/p>\n<p><a href=\"http:\/\/social.msdn.microsoft.com\/Forums\/pt\/webgeralpt\/thread\/226f5e58-1555-4143-80b5-d5755eb86161\" target=\"_blank\" rel=\"noopener noreferrer\">Forum Microsoft<\/a><\/p>\n<p><script type=\"text\/javascript\" src=\"\/\/marketing.valuehost.com.br\/form\/generate.js?id=3\"><\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Utilizar a compress\u00e3o de dados \u00e9 uma excelente pr\u00e1tica de otimiza\u00e7\u00e3o de p\u00e1ginas web, al\u00e9m de ser muito f\u00e1cil de ser implementada . O processo \u00e9 bem simples: o servidor comprime todo o HTML, CSS e Javascript antes de enviar para o navegador, dessa forma a transfer\u00eancia dos arquivos acontece muito mais r\u00e1pida. Pesquisando sobre<\/p>\n","protected":false},"author":1,"featured_media":629,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"amp_status":"","footnotes":""},"categories":[72],"tags":[251,253,249,128,252],"class_list":{"0":"post-607","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-desenvolvimento","8":"tag-compressao","9":"tag-deflate","10":"tag-gzip","11":"tag-htaccess","12":"tag-zlib"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Compress\u00e3o de dados: gzip, zlib e deflate - Blog da ValueHost<\/title>\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.valuehost.com.br\/blog\/compressao-de-dados-gzip-zlib-e-deflate\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Compress\u00e3o de dados: gzip, zlib e deflate - Blog da ValueHost\" \/>\n<meta property=\"og:description\" content=\"Utilizar a compress\u00e3o de dados \u00e9 uma excelente pr\u00e1tica de otimiza\u00e7\u00e3o de p\u00e1ginas web, al\u00e9m de ser muito f\u00e1cil de ser implementada . 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