From 074785cea106179cb3305637055ab0a009ca74f2 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:42:52 -0500
Subject: initial commit

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+---
+title: Accept-CH-Lifetime
+slug: Web/HTTP/Headers/Accept-CH-Lifetime
+tags:
+  - Client hints
+  - Dicas do Cliente
+  - HTTP
+  - HTTP Header
+translation_of: Web/HTTP/Headers/Accept-CH-Lifetime
+---
+<div>{{HTTPSidebar}}{{securecontext_header}}{{SeeCompatTable}}</div>
+
+<p>O cabeçalho <code><strong>Accept-CH-Lifetime</strong></code> é colocado pelo servidor para especificar a persistência do valor do cabeçalho {{HTTPHeader("Accept-CH")}}, que especifica para quais cabeçalhos <a href="/en-US/docs/Glossary/Client_hints">Client Hints</a> o cliente deve incluir nas suas requisições subsequentes.</p>
+
+<table class="properties">
+ <tbody>
+  <tr>
+   <th scope="row">Tipo de cabeçalho</th>
+   <td>{{Glossary("Response header")}}</td>
+  </tr>
+  <tr>
+   <th scope="row">{{Glossary("Forbidden header name")}}</th>
+   <td>?</td>
+  </tr>
+ </tbody>
+</table>
+
+<div class="blockIndicator note">
+<p><strong>Nota:</strong> Client Hints são acessíveis somente em origens seguras (via TLS). Os cabeçalhos Accept-CH e Accept-CH-Lifetime devem ser persistidos por todas as requisições seguras para assegurar que os Client Hints são enviados com segurança.</p>
+</div>
+
+<h2 id="Sintaxe">Sintaxe</h2>
+
+<pre class="syntaxbox">Accept-CH-Lifetime: &lt;age&gt;
+</pre>
+
+<h2 id="Exemplos">Exemplos</h2>
+
+<pre>Accept-CH: Viewport-Width, DPR
+Accept-CH-Lifetime: 86400
+</pre>
+
+<h2 id="Compatibilidade_de_navegador">Compatibilidade de navegador</h2>
+
+<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("http.headers.Accept-CH-Lifetime")}}</p>
+
+<h2 id="Veja_também">Veja também</h2>
+
+<ul>
+ <li>{{HTTPHeader("Accept-CH")}}</li>
+ <li>{{HTTPHeader("Vary")}}</li>
+</ul>
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