rest - 如果您发出 PUT 请求并且服务器上没有这样的实体怎么办？

Question

如果您尝试更新服务器上的实体(发出 PUT 请求)，但没有这样的实体，会发生什么情况？

服务器会创建一个实体还是返回一个错误？

Answer 1

根据 HTTP/1.1 规范服务器可以创建一个新的实体:

The PUT method requests that the enclosed entity be stored under the supplied Request-URI.

If the Request-URI refers to an already existing resource, the enclosed entity SHOULD be considered as a modified version of the one residing on the origin server.

If the Request-URI does not point to an existing resource, and that URI is capable of being defined as a new resource by the requesting user agent, the origin server can create the resource with that URI.

If a new resource is created, the origin server MUST inform the user agent via the 201 (Created) response.