working on List

leveldb.go

@@ -6,6 +6,7 @@ import (
 	"github.com/syndtr/goleveldb/leveldb"
 	"github.com/syndtr/goleveldb/leveldb/filter"
 	"github.com/syndtr/goleveldb/leveldb/opt"
+	"github.com/syndtr/goleveldb/leveldb/util"
 )
 
 type LevelDB struct {
@@ -21,6 +22,18 @@ func NewLevelDB(path string) (*LevelDB, error) {
 	}, err
 }
 
+func (ldb *LevelDB) List(ns []string, limits ...string) ([]string, error) {
+	keys := []string{}
+	r := util.BytesPrefix([]byte{})
+	it := ldb.db.NewIterator(r, nil)
+	defer it.Release()
+	for it.Next() {
+		keys = append(keys, string(it.Key()))
+	}
+	err := it.Error()
+	return keys, err
+}
+
 func (ldb *LevelDB) Get(key string, ns ...string) ([]byte, error) {
 	namespace := resolveNamespace(ns)
 	snapshot, err := ldb.db.GetSnapshot()