---
title: Upgrade-Insecure-Requests
slug: Web/HTTP/Headers/Upgrade-Insecure-Requests
tags:
  - 升级机制
  - 安全性
  - 首部
translation_of: Web/HTTP/Headers/Upgrade-Insecure-Requests
---
<div>{{HTTPSidebar}}</div>

<p><strong><code>Upgrade-Insecure-Requests</code></strong> 是一个请求首部，用来向服务器端发送信号，表示客户端优先选择加密及带有身份验证的响应，并且它可以成功处理 {{CSP("upgrade-insecure-requests")}} <a href="/en-US/docs/Web/Security/CSP">CSP</a> 指令。</p>

<table class="properties">
 <tbody>
  <tr>
   <th scope="row">Header type</th>
   <td>{{Glossary("Request header")}}</td>
  </tr>
  <tr>
   <th scope="row">{{Glossary("Forbidden header name")}}</th>
   <td>no</td>
  </tr>
 </tbody>
</table>

<h2 id="语法">语法</h2>

<pre class="syntaxbox">Upgrade-Insecure-Requests: 1</pre>

<h2 id="示例">示例</h2>

<p>客户端向服务器端发送信号表示它支持 {{CSP("upgrade-insecure-requests")}} 的升级机制：</p>

<pre>GET / HTTP/1.1
Host: example.com
Upgrade-Insecure-Requests: 1</pre>

<p>服务器现在可以重定向到这个站点的安全版本。在响应中可以添加一个 {{HTTPHeader("Vary")}}  首部，这样的话，响应就不会被缓存服务器提供给不支持升级机制的客户端了。</p>

<pre>Location: https://example.com/
Vary: Upgrade-Insecure-Requests</pre>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{specName("Upgrade Insecure Requests", "#preference", "upgrade-insecure-requests")}}</td>
   <td>{{Spec2('Upgrade Insecure Requests')}}</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.Upgrade-Insecure-Requests")}}</p>

<h2 id="相关内容">相关内容</h2>

<ul>
 <li>{{HTTPHeader("Content-Security-Policy")}}</li>
 <li>CSP {{CSP("upgrade-insecure-requests")}} directive</li>
</ul>