请求方法 PUT 用于新增资源或者使用请求中的有效负载替换目标资源的表现形式。
PUT 与 POST 方法的区别在于,PUT方法是幂等的:调用一次与连续调用多次是等价的(即没有副作用),而连续调用多次POST方法可能会有副作用,比如将一个订单重复提交多次。
| Request has body | Yes |
|---|---|
| Successful response has body | No |
| Safe | No |
| Idempotent | Yes |
| Cacheable | No |
| Allowed in HTML forms | No |
语法
PUT /new.html HTTP/1.1
示例
请求
PUT /new.html HTTP/1.1 Host: example.com Content-type: text/html Content-length: 16 <p>New File</p>
应答
如果目标资源不存在,并且PUT方法成功创建了一份,那么源头服务器必须返回201 (Created) 来通知客户端资源已创建。
HTTP/1.1 201 Created Content-Location: /new.html
如果目标资源已经存在,并且依照请求中封装的表现形式成功进行了更新,那么,源头服务器必须返回200 (OK) 或者204 (No Content) 来表示请求的成功完成。
HTTP/1.1 204 No Content Content-Location: /existing.html
规范
| Specification | Title |
|---|---|
| RFC 7231, section 4.3.4: PUT | 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 | 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) |