Methods in WebDAV can be extended through the creation of new methods or the modification of existing ones. This is typically done through the use of WebDAV extensions, which provide additional functionality beyond the standard set of methods.
To extend a method in WebDAV, a new method name should be created, along with a new URL endpoint that accepts the method. The new method should be defined using the same basic structure as the standard WebDAV methods, including a request body and response body.
Once the new method has been defined, it can be deployed on a WebDAV server and accessed by clients that support the extension. Clients can typically determine whether a WebDAV server supports a particular extension by querying its capabilities using the OPTIONS method.
Examples of WebDAV extensions that extend the standard set of methods include the WebDAV Search Extension, which provides a way to search WebDAV resources, and the WebDAV ACL Extension, which provides a way to set access control lists on WebDAV resources.
