Let a Working Folder delete a basename.

CheckDNS needs that to Remove Domain without a second storage path.

Co-authored-by: Cursor <cursoragent@cursor.com>

webdav.go

@@ -335,6 +335,41 @@ func (f webdavFolder) Write(name string, data []byte) error {
 	return fmt.Errorf("webdav PUT %s: %s", name, res.Status)
 }
 
+// Remove implements Folder via WebDAV DELETE.
+func (f webdavFolder) Remove(name string) error {
+	u, err := f.childURL(name)
+	if err != nil {
+		return err
+	}
+	req, err := http.NewRequest(http.MethodDelete, u, nil)
+	if err != nil {
+		return err
+	}
+	for k, vs := range f.root.Cred.AuthHeaders() {
+		for _, v := range vs {
+			req.Header.Set(k, v)
+		}
+	}
+	res, err := f.root.client().Do(req)
+	if err != nil {
+		return err
+	}
+	defer res.Body.Close()
+	if _, err := io.Copy(io.Discard, res.Body); err != nil {
+		return err
+	}
+	switch res.StatusCode {
+	case http.StatusOK, http.StatusNoContent, http.StatusAccepted:
+		return nil
+	case http.StatusNotFound:
+		return fmt.Errorf("%w: %s", ErrNotExist, name)
+	case http.StatusForbidden, http.StatusUnauthorized:
+		return fmt.Errorf("%w", ErrForbidden)
+	default:
+		return fmt.Errorf("webdav DELETE %s: %s", name, res.Status)
+	}
+}
+
 // Exists implements Folder via WebDAV HEAD (falls back to GET when needed).
 func (f webdavFolder) Exists(name string) (bool, error) {
 	u, err := f.childURL(name)