Upgrade-Insecure-Requests 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 upgrade-insecure-requests CSP 指令。
| Header type | Request header |
|---|---|
| Forbidden header name | no |
语法
Upgrade-Insecure-Requests: 1
示例
客户端向服务器端发送信号表示它支持 upgrade-insecure-requests 的升级机制：
GET / HTTP/1.1 Host: example.com Upgrade-Insecure-Requests: 1
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 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。
Location: https://example.com/ Vary: Upgrade-Insecure-Requests
规范
| Specification | Status | Comment |
|---|---|---|
| Upgrade Insecure Requests upgrade-insecure-requests |
Candidate Recommendation | Initial definition. |
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 | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 44 | No1 | 48 | No | 31 | 10.1 |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | ? | 44 | No | 48 | 31 | 10.3 | 4.0 |
1. Under consideration for future release.
相关内容
Content-Security-Policy- CSP
upgrade-insecure-requestsdirective