changes in Download Helper

altered modified time for the file 

downloadhelper/downloadHelper.go

@@ -117,6 +117,12 @@ func DownloadFile(sourcePath, destinationPath, jwtToken string, retryCnt int) (b
 				logginghelper.LogError("Error while closing response : ", closeErr)
 			}
 			logginghelper.LogDebug("DownloadFile : Download Successful")
+
+			timeStampChangeError := changeFileTimes(resp, destinationPath)
+			if timeStampChangeError != nil {
+				logginghelper.LogError("Error while changing timestamp for file : ", destinationPath, " : ", timeStampChangeError)
+			}
+
 			DeleteBackup(destinationPath)
 			logginghelper.LogDebug("OUT : DownloadFile")
 			return true, nil
@@ -197,3 +203,26 @@ func DeleteBackup(filePath string) error {
 	logginghelper.LogDebug("OUT : DeleteBackup")
 	return nil
 }
+
+func changeFileTimes(resp *grab.Response, destination string) error {
+	logginghelper.LogDebug("IN : ChangeFileTimes")
+
+	timeHeader := resp.HTTPResponse.Header.Get("Last-Modified")
+	logginghelper.LogInfo("Header Time:", timeHeader)
+
+	timeUTC, parseError := time.Parse("Mon, 02 Jan 2006 15:04:05 GMT", timeHeader)
+	if parseError != nil {
+		logginghelper.LogError(parseError)
+		return parseError
+	}
+	localtime := timeUTC.Local()
+	logginghelper.LogInfo("Local Time:", localtime)
+	changeError := os.Chtimes(destination, localtime, localtime)
+	if changeError != nil {
+		logginghelper.LogError(changeError)
+		return changeError
+	}
+	logginghelper.LogDebug("OUT : ChangeFileTimes")
+
+	return nil
+}