files/zh-cn/web/http/headers/accept-ch-lifetime/index.html


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---
title: Accept-CH-Lifetime
slug: Web/HTTP/Headers/Accept-CH-Lifetime
translation_of: Web/HTTP/Headers/Accept-CH-Lifetime
---
<div>{{HTTPSidebar}}{{securecontext_header}}{{SeeCompatTable}}</div>

<p>服务器设置<code><strong>Accept-CH-Lifetime</strong></code>标头以指定{{HTTPHeader("Accept-CH")}}标头值的持久性，该值指定客户端应在后续请求中包括哪些<a href="https://developer.mozilla.org/en-US/docs/Glossary/Client_hints">Client Hints</a>标头。</p>

<table class="properties">
 <tbody>
  <tr>
   <th scope="row">Header type</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>注意:</strong> <a href="https://developer.mozilla.org/en-US/docs/Glossary/Client_hints">Client Hints</a>只能在安全源（通过TLS）上访问。所有安全的请求都应该持久化Accept-CH和Accept-CH-Lifetime头，以确保<a href="https://developer.mozilla.org/en-US/docs/Glossary/Client_hints">Client Hints</a>可靠地发送。</p>
</div>

<h2 id="语法">语法</h2>

<pre class="syntaxbox">Accept-CH-Lifetime: &lt;age&gt;
</pre>

<h2 id="示例">示例</h2>

<pre>Accept-CH: Viewport-Width, DPR
Accept-CH-Lifetime: 86400
</pre>

<h2 id="浏览器兼容性">浏览器兼容性</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="参见">参见</h2>

<ul>
 <li>{{HTTPHeader("Accept-CH")}}</li>
 <li>{{HTTPHeader("Vary")}}</li>
</ul>

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<audio id="haloword-audio"></audio>

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<div class="ui-widget-content" id="haloword-lookup">
<div id="haloword-title"><a class="haloword-button" id="haloword-pron" title="发音"></a>

<audio id="haloword-audio"></audio>

<div id="haloword-control-container"><a class="haloword-button" id="haloword-add" title="加入单词表"></a><a class="haloword-button" id="haloword-remove" title="移出单词表"></a><a class="haloword-button" id="haloword-close" title="关闭查询窗"></a></div>
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