From 3db48864bcdb3ab1aa085a77877effa40e782b26 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Thu, 15 Sep 2016 06:23:10 +0200
Subject: [PATCH] Trying to rename downloaded files more than once. This could
 help against aggressive anti virus tools.

---
 .../fabianonline/telegram_backup/Config.java   |  3 +++
 .../telegram_backup/DownloadManager.java       | 18 +++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/main/java/de/fabianonline/telegram_backup/Config.java b/src/main/java/de/fabianonline/telegram_backup/Config.java
index 0339e02..c621ccf 100644
--- a/src/main/java/de/fabianonline/telegram_backup/Config.java
+++ b/src/main/java/de/fabianonline/telegram_backup/Config.java
@@ -40,6 +40,9 @@ public class Config {
     public static int DELAY_AFTER_GET_MESSAGES = 100;
     public static int DELAY_AFTER_GET_FILE = 100;
     
+    public static int RENAMING_MAX_TRIES = 5;
+    public static int RENAMING_DELAY = 1000;
+    
     public static final String SECRET_GMAPS = "AIzaSyBEtUDhCQKEH6i2Mn1GAiQ9M_tLN0vxHIs";
     
     static {
diff --git a/src/main/java/de/fabianonline/telegram_backup/DownloadManager.java b/src/main/java/de/fabianonline/telegram_backup/DownloadManager.java
index 59a5827..6a2ad68 100644
--- a/src/main/java/de/fabianonline/telegram_backup/DownloadManager.java
+++ b/src/main/java/de/fabianonline/telegram_backup/DownloadManager.java
@@ -311,7 +311,23 @@ public class DownloadManager {
 				System.exit(1);
 			}
 			logger.trace("Renaming {} to {}", temp_filename, target);
-			Files.move(new File(temp_filename).toPath(), new File(target).toPath(), StandardCopyOption.REPLACE_EXISTING);
+			int rename_tries = 0;
+			IOException last_exception = null;
+			while (rename_tries <= Config.RENAMING_MAX_TRIES) {
+				rename_tries++;
+				try {
+					Files.move(new File(temp_filename).toPath(), new File(target).toPath(), StandardCopyOption.REPLACE_EXISTING);
+					last_exception = null;
+					break;
+				} catch (IOException e) {
+					logger.debug("Exception during move. rename_tries: {}. Exception: {}", rename_tries, e);
+					last_exception = e;
+					try { Thread.sleep(Config.RENAMING_DELAY); } catch (InterruptedException e2) {}
+				}
+			}
+			if (last_exception != null) {
+				throw last_exception;
+			}
 			last_download_succeeded = true;
 			return true;
 		} catch (java.io.IOException ex) {