fix #1838

app/core/config.py

@@ -359,7 +359,7 @@ class Settings(BaseSettings):
         """
         if not self.DOWNLOADER:
             return None
-        return self.DOWNLOADER.split(",")[0]
+        return next((d for d in settings.DOWNLOADER.split(",") if d), None)
 
     @property
     def DOWNLOADERS(self):
@@ -368,7 +368,7 @@ class Settings(BaseSettings):
         """
         if not self.DOWNLOADER:
             return []
-        return self.DOWNLOADER.split(",")
+        return [d for d in settings.DOWNLOADER.split(",") if d]
 
     def __init__(self, **kwargs):
         super().__init__(**kwargs)

app/core/plugin.py

@@ -619,6 +619,8 @@ class PluginManager(metaclass=Singleton):
         with concurrent.futures.ThreadPoolExecutor() as executor:
             futures = []
             for m in settings.PLUGIN_MARKET.split(","):
+                if not m:
+                    continue
                 futures.append(executor.submit(__get_plugin_info, m))
             for future in concurrent.futures.as_completed(futures):
                 plugins = future.result()