状态码 401 Unauthorized 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。
这个状态码会与 WWW-Authenticate 首部一起发送，其中包含有如何进行验证的信息。
这个状态类似于 403， 但是在该情况下，依然可以进行身份验证。
状态
401 Unauthorized
响应示例
HTTP/1.1 401 Unauthorized Date: Wed, 21 Oct 2015 07:28:00 GMT WWW-Authenticate: Basic realm="Access to staging site"
规范
| Specification | Title |
|---|---|
| RFC 7235, section 3.1: 401 Unauthorized | HTTP/1.1: Authentication |
浏览器兼容性
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Feature | Chrome | Firefox | Edge | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic Support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
| Feature | Android | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
|---|---|---|---|---|---|---|---|
| Basic Support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |