From 07c712af4dd248c96346e0ed6a78c1e8307d9f47 Mon Sep 17 00:00:00 2001
From: Frederic Germain <frederic.germain@gmail.com>
Date: Thu, 27 Jun 2019 08:19:56 +0200
Subject: [PATCH] Fix resume download by not using cache date.

Do not use cache date if trying to resume download: if
the "If-Modified-Since:" HTTP header is present, Apple
servers ignores the Range: HTTP header.
---
 installinstallmacos.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/installinstallmacos.py b/installinstallmacos.py
index 05bad4e..4209ec3 100755
--- a/installinstallmacos.py
+++ b/installinstallmacos.py
@@ -239,9 +239,10 @@ def replicate_url(full_url,
     curl_cmd = ['/usr/bin/curl', options, '--create-dirs',
                 '-o', local_file_path]
     if not ignore_cache and os.path.exists(local_file_path):
-        curl_cmd.extend(['-z', local_file_path])
         if attempt_resume:
             curl_cmd.extend(['-C', '-'])
+        else:
+            curl_cmd.extend(['-z', local_file_path])
     curl_cmd.append(full_url)
     print("Downloading %s..." % full_url)
     try: