refactor

weed/storage/needle/needle_read_page.go

@@ -2,11 +2,12 @@ package needle
 
 import (
 	"fmt"
+	"io"
+
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/storage/backend"
 	. "github.com/seaweedfs/seaweedfs/weed/storage/types"
 	"github.com/seaweedfs/seaweedfs/weed/util"
-	"io"
 )
 
 // ReadNeedleData uses a needle without n.Data to read the content
@@ -78,10 +79,7 @@ func (n *Needle) ReadNeedleMeta(r backend.BackendStorageFile, offset int64, size
 		index, err = n.readNeedleDataVersion2NonData(metaSlice)
 	}
 
-	n.Checksum = CRC(util.BytesToUint32(metaSlice[index : index+NeedleChecksumSize]))
-	if version == Version3 {
-		n.AppendAtNs = util.BytesToUint64(metaSlice[index+NeedleChecksumSize : index+NeedleChecksumSize+TimestampSize])
-	}
+	err = n.readNeedleTail(metaSlice[index:], version)
 	return err
 
 }