[agent-operator] - DLTU download from oss part

agent-common/utils/FileUtils.go

@@ -1,6 +1,8 @@
 package utils
 
 import (
+	"bufio"
+	"fmt"
 	"io"
 	"os"
 	"path/filepath"
@@ -160,3 +162,28 @@ func RemoveFolderComplete(folderName string) bool {
 	}
 	return true
 }
+
+func ReadLineFromFile(fileFullPath string) (result []string) {
+
+	f, err := os.Open(fileFullPath)
+	if err != nil {
+		fmt.Println(err)
+		return result
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if len(line) > 0 { // ignore empty lines
+			result = append(result, line)
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		fmt.Println(err)
+		return result
+	}
+
+	return result
+}