auto close the handle after buffer loaded

binding/golang/xdb/util.go

@@ -76,7 +76,13 @@ func LoadHeaderFromFile(dbFile string) (*Header, error) {
 		return nil, fmt.Errorf("open xdb file `%s`: %w", dbFile, err)
 	}
 
-	return LoadHeader(handle)
+	header, err := LoadHeader(handle)
+	if err != nil {
+		return nil, err
+	}
+
+	_ = handle.Close()
+	return header, nil
 }
 
 // LoadHeaderFromBuff wrap the header info from the content buffer
@@ -112,7 +118,13 @@ func LoadVectorIndexFromFile(dbFile string) ([]byte, error) {
 		return nil, fmt.Errorf("open xdb file `%s`: %w", dbFile, err)
 	}
 
-	return LoadVectorIndex(handle)
+	vIndex, err := LoadVectorIndex(handle)
+	if err != nil {
+		return nil, err
+	}
+
+	_ = handle.Close()
+	return vIndex, nil
 }
 
 // LoadContent load the whole xdb content from the specified file handle
@@ -151,5 +163,11 @@ func LoadContentFromFile(dbFile string) ([]byte, error) {
 		return nil, fmt.Errorf("open xdb file `%s`: %w", dbFile, err)
 	}
 
-	return LoadContent(handle)
+	cBuff, err := LoadContent(handle)
+	if err != nil {
+		return nil, err
+	}
+
+	_ = handle.Close()
+	return cBuff, nil
 }