masterclient: fallback to directly querying master in case of missing volume id location

weed/wdclient/masterclient.go

@@ -38,6 +38,36 @@ func NewMasterClient(grpcDialOption grpc.DialOption, filerGroup string, clientTy
 	}
 }
 
+func (mc *MasterClient) GetLookupFileIdFunction() LookupFileIdFunctionType {
+	return mc.LookupFileIdWithFallback
+}
+
+func (mc *MasterClient) LookupFileIdWithFallback(fileId string) (fullUrls []string, err error) {
+	fullUrls, err = mc.vidMap.LookupFileId(fileId)
+	err = pb.WithMasterClient(false, mc.currentMaster, mc.grpcDialOption, func(client master_pb.SeaweedClient) error {
+		resp, err := client.LookupVolume(context.Background(), &master_pb.LookupVolumeRequest{
+			VolumeOrFileIds: []string{fileId},
+		})
+		if err != nil {
+			return err
+		}
+		for vid, vidLocation := range resp.VolumeIdLocations {
+			for _, vidLoc := range vidLocation.Locations {
+				loc := Location{
+					Url:       vidLoc.Url,
+					PublicUrl: vidLoc.PublicUrl,
+					GrpcPort:  int(vidLoc.GrpcPort),
+				}
+				mc.vidMap.addLocation(uint32(vid), loc)
+				fullUrls = append(fullUrls, loc.Url)
+			}
+		}
+
+		return nil
+	})
+	return
+}
+
 func (mc *MasterClient) GetMaster() pb.ServerAddress {
 	mc.WaitUntilConnected()
 	return mc.currentMaster

weed/wdclient/vid_map.go

@@ -90,10 +90,6 @@ func (vc *vidMap) LookupVolumeServerUrl(vid string) (serverUrls []string, err er
 	return
 }
 
-func (vc *vidMap) GetLookupFileIdFunction() LookupFileIdFunctionType {
-	return vc.LookupFileId
-}
-
 func (vc *vidMap) LookupFileId(fileId string) (fullUrls []string, err error) {
 	parts := strings.Split(fileId, ",")
 	if len(parts) != 2 {