---
title: Access-Control-Request-Headers
slug: Web/HTTP/Headers/Access-Control-Request-Headers
tags:
  - 跨域资源共享
translation_of: Web/HTTP/Headers/Access-Control-Request-Headers
---
<div>{{HTTPSidebar}}</div>

<p>请求头  <strong><code>Access-Control-Request-Headers </code></strong>出现于 {{glossary("preflight request")}} （预检请求）中，用于通知服务器在真正的请求中会采用哪些请求头。</p>

<table class="properties">
 <tbody>
  <tr>
   <th scope="row">报头类型</th>
   <td>{{Glossary("Request header")}}</td>
  </tr>
  <tr>
   <th scope="row">{{Glossary("Forbidden header name")}}</th>
   <td>yes</td>
  </tr>
 </tbody>
</table>

<h2 id="语法">语法</h2>

<pre class="syntaxbox">Access-Control-Request-Headers: &lt;header-name&gt;, &lt;header-name&gt;, ...
</pre>

<h2 id="指令">指令</h2>

<dl>
 <dt>&lt;header-name&gt;</dt>
 <dd>在实际请求中将要包含的一系列 <a href="/en-US/docs/Web/HTTP/Headers">HTTP </a>头，以逗号分隔。</dd>
</dl>

<h2 id="示例">示例</h2>

<pre>Access-Control-Request-Headers: X-PINGOTHER, Content-Type</pre>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">规范</th>
   <th scope="col">状态</th>
   <th scope="col">注释</th>
  </tr>
  <tr>
   <td>{{SpecName('Fetch','#http-access-control-request-headers', 'Access-Control-Request-Headers')}}</td>
   <td>{{Spec2("Fetch")}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

<p>{{Compat("http.headers.Access-Control-Request-Headers")}}</p>

<h2 id="相关内容">相关内容</h2>

<ul>
 <li>{{HTTPHeader("Access-Control-Request-Method")}}</li>
</ul>