moved the database-go project to this repository

storage/file_storage.go

@@ -0,0 +1,45 @@
+package storage
+
+import (
+	"fmt"
+	"os"
+)
+
+func SaveData1(path string, data []byte) error {
+	file, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0664)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	_, err = file.Write(data)
+	if err != nil {
+		return err
+	}
+
+	return file.Sync()
+}
+
+func SaveData2(path string, data []byte) error {
+	tmp := fmt.Sprintf("%s.tmp.%d", path, randomInt())
+	file, err := os.OpenFile(tmp, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0664)
+	if err != nil {
+		return err
+	}
+	defer func ()  {
+		file.Close()
+		if err != nil {
+			os.Remove(tmp)
+		}
+	}()
+
+	if _, err = file.Write(data); err != nil {
+		return err
+	}
+	if err = file.Sync(); err != nil {
+		return err
+	}
+
+	err = os.Rename(tmp, path)
+	return err
+}