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---
title: 401 Unauthorized
slug: Web/HTTP/Status/401
tags:
- 客户端错误
- 状态码
- 身份验证
- 身份验证凭证
translation_of: Web/HTTP/Status/401
---
<div>{{HTTPSidebar}}</div>
<p>状态码 <strong><code>401 Unauthorized</code></strong> 代表客户端错误，指的是由于缺乏目标资源要求的身份验证凭证，发送的请求未得到满足。</p>
<p>这个状态码会与 {{HTTPHeader("WWW-Authenticate")}} 首部一起发送，其中包含有如何进行验证的信息。</p>
<p>这个状态类似于 {{HTTPStatus("403")}}， 但是在该情况下，依然可以进行身份验证。</p>
<h2 id="状态">状态</h2>
<pre class="syntaxbox">401 Unauthorized</pre>
<h2 id="响应示例">响应示例</h2>
<pre>HTTP/1.1 401 Unauthorized
Date: Wed, 21 Oct 2015 07:28:00 GMT
WWW-Authenticate: Basic realm="Access to staging site"</pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Title</th>
</tr>
<tr>
<td>{{RFC("7235", "401 Unauthorized" , "3.1")}}</td>
<td>HTTP/1.1: Authentication</td>
</tr>
</tbody>
</table>
<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.status.401")}}</p>
<h2 id="相关内容">相关内容</h2>
<ul>
<li><a href="/en-US/docs/Web/HTTP/Authentication">HTTP authentication</a></li>
<li>{{HTTPHeader("WWW-Authenticate")}}</li>
<li>{{HTTPHeader("Authorization")}}</li>
<li>{{HTTPHeader("Proxy-Authorization")}}</li>
<li>{{HTTPHeader("Proxy-Authenticate")}}</li>
<li>{{HTTPStatus("403")}}, {{HTTPStatus("407")}}</li>
</ul>
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