From 0b84068d84d9c5d811044c63d9a3370d75aa0249 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20F=C3=A4hrmann?= <mike_faehrmann@web.de>
Date: Sat, 18 Jan 2020 00:30:57 +0100
Subject: [PATCH] remove temp files before downloading from fallback URLs

otherwise the next call to download() with a fallback URL could see
the partially downloaded "remains" from the previous, failed download
attempt and "continue" it, writing the second half of a potentially
different version of that file.
---
 gallery_dl/job.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gallery_dl/job.py b/gallery_dl/job.py
index 699f057a..5779d65c 100644
--- a/gallery_dl/job.py
+++ b/gallery_dl/job.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright 2015-2019 Mike Fährmann
+# Copyright 2015-2020 Mike Fährmann
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
@@ -209,6 +209,7 @@ class DownloadJob(Job):
 
             # use fallback URLs if available
             for num, url in enumerate(fallback or (), 1):
+                util.remove_file(self.temppath)
                 self.log.info("Trying fallback URL #%d", num)
                 if self.download(url):
                     break