From 22755665f3292998bcff5c45c61e076d0f970bdd Mon Sep 17 00:00:00 2001
From: YeZheng <csyezheng@gmail.com>
Date: Sat, 9 Dec 2023 12:06:37 +0800
Subject: [PATCH] updated to version 0.12.3; check if the url exists when
 downloading resources

---
 README.md                   | 4 ++--
 coursera_helper/__init__.py | 2 +-
 coursera_helper/workflow.py | 4 ++++
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 33dc51d0..dceb3bd0 100644
--- a/README.md
+++ b/README.md
@@ -207,7 +207,7 @@ Find your coursera CAUTH:
 
 4. find and click CAUTH > Copy value CAUTH
 
-**Firefox **:
+**Firefox**:
 
 1. Open the browser and login to https://www.coursera.org/
 
@@ -231,7 +231,7 @@ If you are from China and you're having problems downloading videos, adding
 
 in the hosts file (`/etc/hosts` or `C:\Windows\System32\drivers\etc`) 
 
-Refresh DNS with this command in the terminal.
+Flush DNS with this command in the terminal.
 
 ```
 ipconfig /flushdns
diff --git a/coursera_helper/__init__.py b/coursera_helper/__init__.py
index 92a60bdf..c4e914ae 100644
--- a/coursera_helper/__init__.py
+++ b/coursera_helper/__init__.py
@@ -1 +1 @@
-__version__ = '0.12.2'
+__version__ = '0.12.3'
diff --git a/coursera_helper/workflow.py b/coursera_helper/workflow.py
index 56143acd..f742778d 100644
--- a/coursera_helper/workflow.py
+++ b/coursera_helper/workflow.py
@@ -220,6 +220,10 @@ def _handle_resource(self, url, fmt, lecture_filename, callback, last_update):
         resume = self._args.resume
         skip_download = self._args.skip_download
 
+        if not url:
+            logging.info('Downloading: %s failed, url does not exists', lecture_filename)
+            return last_update
+
         # Decide whether we need to download it
         if overwrite or not os.path.exists(lecture_filename) or resume:
             if not skip_download: