{"id":25663,"date":"2019-04-04T04:46:21","date_gmt":"2019-04-04T11:46:21","guid":{"rendered":"https:\/\/kinsta.com\/?post_type=knowledgebase&#038;p=9888"},"modified":"2025-10-01T20:53:09","modified_gmt":"2025-10-01T19:53:09","slug":"entete-specify-vary-accept-encoding","status":"publish","type":"post","link":"https:\/\/kinsta.com\/fr\/blog\/entete-specify-vary-accept-encoding\/","title":{"rendered":"Comment corriger l\u2019avertissement \u201cSpecify a Vary: Accept-Encoding Header\u201d"},"content":{"rendered":"<p>Voyez-vous le message \u00ab\u00a0Specify a Vary Accept-Encoding Header\u00a0\u00bb dans <a href=\"https:\/\/kinsta.com\/fr\/blog\/test-vitesse-pingdom\/\" target=\"_blank\" rel=\"noopener noreferrer\">Pingdom<\/a>, <a href=\"https:\/\/kinsta.com\/fr\/blog\/test-vitesse-gtmetrix\/\">GTmetrix<\/a>, ou <a href=\"https:\/\/kinsta.com\/fr\/blog\/google-pagespeed-insights\/\" target=\"_blank\" rel=\"noopener noreferrer\">Google PageSpeed Insights<\/a> sur votre site WordPress ? Il s&rsquo;agit d&rsquo;un en-t\u00eate HTTP qui doit \u00eatre inclus dans chaque r\u00e9ponse du serveur d&rsquo;origine, car il indique au navigateur si le client peut ou non g\u00e9rer les versions compress\u00e9es du contenu.<\/p>\n<p>Par exemple, disons que vous avez un vieux navigateur sans compression gzip et un navigateur moderne avec lui. Si vous n&rsquo;utilisez pas l\u2019en-t\u00eate <strong>Vary: Accept-Encoding,<\/strong> votre serveur Web ou <a href=\"https:\/\/kinsta.com\/fr\/blog\/cdn-wordpress\/\" target=\"_blank\" rel=\"noopener noreferrer\">CDN<\/a> peut mettre en cache la version non compress\u00e9e et la transmettre par erreur au navigateur moderne, ce qui nuit \u00e0 la performance de votre site WordPress. En utilisant l\u2019en-t\u00eate <strong>Vary: Accept-Encoding<\/strong>, vous pouvez vous assurer que votre serveur Web et\/ou CDN fournit la version appropri\u00e9e.<\/p>\n<p>Selon l&rsquo;outil ou le logiciel qui le signale, l&rsquo;avertissement peut appara\u00eetre de deux fa\u00e7ons diff\u00e9rentes :<\/p>\n<ul style=\"margin-left: 30px\">\n<li>\u00ab\u00a0Specify a Vary: Accept-Encoding Header\u00a0\u00bb<\/li>\n<li>The following publicly cacheable, compressible resources should have a \u00ab\u00a0vary: accept-encoding\u00a0\u00bb header<\/li>\n<\/ul>\n<figure style=\"width: 1688px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/fr\/wp-content\/uploads\/sites\/4\/2017\/03\/specify-vary-accept-encoding-header-1.png\" alt=\"Avertissement Specify a Vary: Accept-Encoding Header dans Pingdom\" width=\"1688\" height=\"1205\"><figcaption class=\"wp-caption-text\">Avertissement Specify a Vary: Accept-Encoding Header dans Pingdom<\/figcaption><\/figure>\n<p>Suivez les \u00e9tapes ci-dessous pour corriger l\u2019avertissement \u00ab\u00a0Specify a Vary: Accept-Encoding Header\u00a0\u00bb.<\/p>\n<h2>Correction de l\u2019avertissement \u00a0\u00bb Specify a Vary: Accept-Encoding Header\u00a0\u00bb<\/h2>\n<p>La premi\u00e8re chose qu&rsquo;il est important de noter \u00e0 propos de cet avertissement est que <u>vous ne pouvez le corriger que pour les requ\u00eates qui sont sur votre serveur<\/u>. Si vous avez des requ\u00eates de tierces parties sur lesquelles vous voyez cela, il n&rsquo;y a rien que vous puissiez faire car vous n&rsquo;avez pas de contr\u00f4le sur leurs serveurs web. Ainsi, n&rsquo;h\u00e9sitez pas \u00e0 partager cet article avec eux. L\u2019en-t\u00eate <strong>Vary: Accept-Encoding<\/strong> est ajout\u00e9 par d\u00e9faut sur tous les serveurs Kinsta (comme indiqu\u00e9 ci-dessous), donc si vous \u00eates un client Kinsta, vous ne verrez jamais cet avertissement et n&rsquo;aurez pas \u00e0 vous inqui\u00e9ter.<\/p>\n<figure style=\"width: 1567px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/fr\/wp-content\/uploads\/sites\/4\/2017\/03\/vary-accept-encoding-header-kinsta-1.png\" alt=\"vary: accept-encoding header kinsta\" width=\"1567\" height=\"622\"><figcaption class=\"wp-caption-text\">En-t\u00eate Vary: Accept-Encoding sur les serveurs Kinsta<\/figcaption><\/figure>\n<p>L&rsquo;en-t\u00eate s&rsquo;applique \u00e0 la fois \u00e0 vos ressources WordPress et \u00e0 votre requ\u00eate serveur d&rsquo;origine. Pour vos ressources, si vous utilisez un CDN, beaucoup ajoutent d\u00e9j\u00e0 <strong>Vary: Accept-Encoding<\/strong> par d\u00e9faut. KeyCDN, Cloudflare et CloudFront utilisent tous cela. Un grand nombre de plugins de cache WordPress ajoutent \u00e9galement ceci.<\/p>\n<p>Si vous avez encore besoin de corriger cela, vous devrez ajouter du code \u00e0 votre serveur.<\/p>\n<h3>Correction de l\u2019avertissement \u00ab\u00a0Specify a Vary: Accept-Encoding Header\u00a0\u00bb dans Apache<\/h3>\n<p>Pour corriger cela dans <a href=\"https:\/\/kinsta.com\/fr\/blog\/qu-est-ce-qu-apache\/\">Apache<\/a>, ajoutez le code suivant \u00e0 votre fichier .htaccess via FTP. Ce fichier se trouve \u00e0 la racine de votre serveur. Vous pouvez \u00e9galement <a href=\"https:\/\/kb.yoast.com\/kb\/how-to-edit-htaccess-through-yoast-seo\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u00e9diter votre fichier .htaccess<\/a> avec le <a href=\"https:\/\/kinsta.com\/fr\/blog\/yoast-seo\/\" target=\"_blank\" rel=\"noopener noreferrer\">plugin Yoast SEO<\/a> si vos permissions sont correctement d\u00e9finies.<\/p>\n<div class=\"warning\" style=\"background: #FFFCE3;padding: 22px;margin-bottom: 22px\">Important ! L&rsquo;\u00e9dition de votre fichier .htaccess pourrait casser votre site si ce n&rsquo;est pas fait correctement. Si vous n&rsquo;\u00eates pas \u00e0 l&rsquo;aise de le faire, veuillez d&rsquo;abord v\u00e9rifier aupr\u00e8s de votre h\u00e9bergeur.<\/div>\n<pre class=\"toolbar:2 show-lang:2 show-plain:3 lang:default highlight:0 decode:true\">&lt;IfModule mod_headers.c&gt;\n  &lt;FilesMatch \".(js|css|xml|gz|html)$\"&gt;\n    Header append Vary: Accept-Encoding\n  &lt;\/FilesMatch&gt;\n&lt;\/IfModule&gt;<\/pre>\n<h3>Correction de l\u2019avertissement \u00a0\u00bb Specify a Vary: Accept-Encoding Header\u00a0\u00bb dans NGINX<\/h3>\n<p>Pour corriger cela dans <a href=\"https:\/\/kinsta.com\/fr\/blog\/qu-est-ce-que-nginx\/\">NGINX<\/a>, ajoutez le code suivant \u00e0 votre fichier de configuration. Tous les fichiers de configuration NGINX se trouvent dans le r\u00e9pertoire <code>\/etc\/nginx\/<\/code>. Le fichier de configuration principal est <code>\/etc\/nginx\/nginx\/nginx.conf<\/code>.<\/p>\n<pre class=\"toolbar:2 show-lang:2 show-plain:3 lang:default highlight:0 decode:true\">gzip_vary on<\/pre>\n<p>Utiliser l\u2019en-t\u00eate <strong>Vary: Accept-Encoding <\/strong>peut en fait aider \u00e0 acc\u00e9l\u00e9rer votre site WordPress car cela vous assurera que vous utilisez la compression gzip. Et si tout se passe bien, et que vous n&rsquo;avez pas de requ\u00eates de tiers qui n&rsquo;utilisent pas correctement l&rsquo;en-t\u00eate, vous devriez voir une am\u00e9lioration sur votre score avec des outils de test de vitesse de site web tels que Pingdom (comme vu ci-dessous).<\/p>\n<figure style=\"width: 1691px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/fr\/wp-content\/uploads\/sites\/4\/2017\/03\/correction-avertissent-accept-encoding-header.png\" alt=\"Correction de l\u2019avertissent Accept-Encoding header\" width=\"1691\" height=\"683\"><figcaption class=\"wp-caption-text\">Correction de l\u2019avertissent Specify a Vary: Accept-Encoding header<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Voyez-vous le message \u00ab\u00a0Specify a Vary Accept-Encoding Header\u00a0\u00bb dans Pingdom, GTmetrix, ou Google PageSpeed Insights sur votre site WordPress ? Il s&rsquo;agit d&rsquo;un en-t\u00eate HTTP qui &#8230;<\/p>\n","protected":false},"author":38,"featured_media":58488,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[],"topic":[1032],"class_list":["post-25663","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","topic-erreurs-wordpress"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Comment corriger l\u2019avertissement \u201cSpecify a Vary: Accept-Encoding Header\u201d<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez comment corriger l&#039;avertissement &quot;Specify a Vary: Accept-Encoding Header&quot; sur votre site WordPress que vous voyez dans Pingdom, GTmetrix et PageSpeed Insights.\" \/>\n<meta name=\"robots\" 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