From 556b15a4c338eab5c19ef2037accd9644a1196e7 Mon Sep 17 00:00:00 2001
From: OpenClaw Agent <openclaw@example.com>
Date: Mon, 21 Sep 2026 20:31:44 +0800
Subject: [PATCH] fix: align WebDAV MOVE overwrite and source errors

---
 chfs-ng/internal/api/server.go | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/chfs-ng/internal/api/server.go b/chfs-ng/internal/api/server.go
index c2faa7a..2d6ae98 100644
--- a/chfs-ng/internal/api/server.go
+++ b/chfs-ng/internal/api/server.go
@@ -914,9 +914,11 @@ func (f *webdavStorageFS) Copy(ctx context.Context, name, dest string, opts *web
 func (f *webdavStorageFS) Move(ctx context.Context, name, dest string, opts *webdav.MoveOptions) (bool, error) {
 	src := davStoragePath(name)
 	dst := davStoragePath(dest)
-	if opts != nil && opts.NoOverwrite {
+	if opts == nil || opts.NoOverwrite {
 		if _, err := f.store.Stat(dst); err == nil {
-			return false, fmt.Errorf("destination exists")
+			return false, webdav.NewHTTPError(http.StatusPreconditionFailed, fmt.Errorf("destination exists"))
+		} else if !os.IsNotExist(err) {
+			return false, err
 		}
 	}
 	if m, ok := f.store.(storage.Multi); ok {
@@ -926,7 +928,16 @@ func (f *webdavStorageFS) Move(ctx context.Context, name, dest string, opts *web
 			return false, webdav.NewHTTPError(http.StatusForbidden, fmt.Errorf("cross-root move is not supported"))
 		}
 	}
+	if _, err := f.store.Stat(src); err != nil {
+		if os.IsNotExist(err) {
+			return false, webdav.NewHTTPError(http.StatusNotFound, err)
+		}
+		return false, err
+	}
 	if err := f.store.Rename(src, dst); err != nil {
+		if os.IsNotExist(err) {
+			return false, webdav.NewHTTPError(http.StatusNotFound, err)
+		}
 		return false, webdav.NewHTTPError(http.StatusForbidden, err)
 	}
 	return true, nil