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HTTP TRACE 方法 实行了向目标资源的沿路径的消息环回(loop-back)测试 ，提供了一种实用的debug机制。
请求的最终接受者应当反射它接收到的除以下描述的消息到客户端，消息的主体(body)是一个包含message/http的Content-Type的200(状态码OK)的响应。最终接受者是初始服务器或是第一个接受到请求Max-Forwards 的值为0的服务器。
| Request has body | No |
|---|---|
| Successful response has body | No |
| Safe | No |
| Idempotent | Yes |
| Cacheable | No |
| Allowed in HTML forms | No |
句法
TRACE /index.html
规范
| 规范 | 标题 |
|---|---|
| RFC 7231, section 4.3.8: TRACE | Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content |
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 | Yes | Yes | Yes | Yes | Yes | Yes |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
See also