feat: add webdav driver

drivers/webdav/util.go

@@ -0,0 +1,31 @@
+package webdav
+
+import (
+	"net/http"
+
+	"github.com/alist-org/alist/v3/drivers/webdav/odrvcookie"
+	"github.com/alist-org/alist/v3/pkg/gowebdav"
+)
+
+// do others that not defined in Driver interface
+
+func (d *WebDav) isSharepoint() bool {
+	return d.Vendor == "sharepoint"
+}
+
+func (d *WebDav) setClient() error {
+	c := gowebdav.NewClient(d.Address, d.Username, d.Password)
+	if d.isSharepoint() {
+		cookie, err := odrvcookie.GetCookie(d.Username, d.Password, d.Address)
+		if err == nil {
+			c.SetInterceptor(func(method string, rq *http.Request) {
+				rq.Header.Del("Authorization")
+				rq.Header.Set("Cookie", cookie)
+			})
+		} else {
+			return err
+		}
+	}
+	d.client = c
+	return nil
+}