DownloadHelper changes

fileavailability check added

downloadhelper/downloadHelper.go

@@ -32,14 +32,17 @@ func DownloadFile(sourcePath, destinationPath, jwtToken string, retryCnt int) (b
 		return false, errors.New("Either Source/Destination url is empty or source url does not start with 'http'")
 	}
 	// dest directory must be a string. check for the same.
-	destInfo, infoError := filehelper.FileInfo(destinationPath)
-	if infoError != nil {
-		return false, errors.New("error occured while getting innformation of destination directory : " + destinationPath)
-	}
+	if filehelper.FileAvailabilityCheck(destinationPath) {
+		destInfo, infoError := filehelper.FileInfo(destinationPath)
+		if infoError != nil {
+			return false, errors.New("error occured while getting innformation of destination directory : " + destinationPath)
+		}
 
-	if destInfo.IsDir() {
-		return false, errors.New("destination path must be a file path, got directory : " + destinationPath)
+		if destInfo.IsDir() {
+			return false, errors.New("destination path must be a file path, got directory : " + destinationPath)
+		}
 	}
+
 	client := grab.NewClient()
 	req, _ := grab.NewRequest(destinationPath, sourcePath)
 	if jwtToken != "NA" {