conditional delete

other/java/client/src/main/proto/filer.proto

@@ -221,6 +221,7 @@ message DeleteEntryRequest {
     bool ignore_recursive_error = 6;
     bool is_from_other_cluster = 7;
     repeated int32 signatures = 8;
+    int64 if_not_modified_after = 9;
 }
 
 message DeleteEntryResponse {

weed/filer/filer_delete_entry.go

@@ -17,7 +17,7 @@ const (
 type OnChunksFunc func([]*filer_pb.FileChunk) error
 type OnHardLinkIdsFunc func([]HardLinkId) error
 
-func (f *Filer) DeleteEntryMetaAndData(ctx context.Context, p util.FullPath, isRecursive, ignoreRecursiveError, shouldDeleteChunks, isFromOtherCluster bool, signatures []int32) (err error) {
+func (f *Filer) DeleteEntryMetaAndData(ctx context.Context, p util.FullPath, isRecursive, ignoreRecursiveError, shouldDeleteChunks, isFromOtherCluster bool, signatures []int32, ifNotModifiedAfter int64) (err error) {
 	if p == "/" {
 		return nil
 	}
@@ -26,6 +26,9 @@ func (f *Filer) DeleteEntryMetaAndData(ctx context.Context, p util.FullPath, isR
 	if findErr != nil {
 		return findErr
 	}
+	if ifNotModifiedAfter > 0 && entry.Attr.Mtime.Unix() > ifNotModifiedAfter {
+		return nil
+	}
 	isDeleteCollection := f.isBucket(entry)
 	if entry.IsDirectory() {
 		// delete the folder children, not including the folder itself

weed/pb/filer.proto

@@ -221,6 +221,7 @@ message DeleteEntryRequest {
     bool ignore_recursive_error = 6;
     bool is_from_other_cluster = 7;
     repeated int32 signatures = 8;
+    int64 if_not_modified_after = 9;
 }
 
 message DeleteEntryResponse {

weed/server/filer_grpc_server.go

@@ -291,7 +291,7 @@ func (fs *FilerServer) DeleteEntry(ctx context.Context, req *filer_pb.DeleteEntr
 
 	glog.V(4).Infof("DeleteEntry %v", req)
 
-	err = fs.filer.DeleteEntryMetaAndData(ctx, util.JoinPath(req.Directory, req.Name), req.IsRecursive, req.IgnoreRecursiveError, req.IsDeleteData, req.IsFromOtherCluster, req.Signatures)
+	err = fs.filer.DeleteEntryMetaAndData(ctx, util.JoinPath(req.Directory, req.Name), req.IsRecursive, req.IgnoreRecursiveError, req.IsDeleteData, req.IsFromOtherCluster, req.Signatures, req.IfNotModifiedAfter)
 	resp = &filer_pb.DeleteEntryResponse{}
 	if err != nil && err != filer_pb.ErrNotFound {
 		resp.Error = err.Error()

weed/server/filer_grpc_server_rename.go

@@ -203,7 +203,7 @@ func (fs *FilerServer) moveSelfEntry(ctx context.Context, stream filer_pb.Seawee
 
 	// delete old entry
 	ctx = context.WithValue(ctx, "OP", "MV")
-	deleteErr := fs.filer.DeleteEntryMetaAndData(ctx, oldPath, false, false, false, false, signatures)
+	deleteErr := fs.filer.DeleteEntryMetaAndData(ctx, oldPath, false, false, false, false, signatures, 0)
 	if deleteErr != nil {
 		return deleteErr
 	}

weed/server/filer_server_handlers_write.go

@@ -212,7 +212,7 @@ func (fs *FilerServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
 		objectPath = objectPath[0 : len(objectPath)-1]
 	}
 
-	err := fs.filer.DeleteEntryMetaAndData(context.Background(), util.FullPath(objectPath), isRecursive, ignoreRecursiveError, !skipChunkDeletion, false, nil)
+	err := fs.filer.DeleteEntryMetaAndData(context.Background(), util.FullPath(objectPath), isRecursive, ignoreRecursiveError, !skipChunkDeletion, false, nil, 0)
 	if err != nil {
 		if err == filer_pb.ErrNotFound {
 			writeJsonQuiet(w, r, http.StatusNoContent, nil)