[#2729] [Blocklist] Fix plugin lockup with empty url

deluge/plugins/Blocklist/deluge/plugins/blocklist/core.py

@@ -123,6 +123,8 @@ class Core(CorePluginBase):
             Deferred: A Deferred which fires when the blocklist has been imported.
 
         """
+        if not self.config["url"]:
+            return
 
         # Reset variables
         self.filename = None

deluge/plugins/Blocklist/deluge/plugins/blocklist/gtkui.py

@@ -121,7 +121,7 @@ class GtkUI(GtkPluginBase):
 
     def _on_apply_prefs(self):
         config = {}
-        config["url"] = self.glade.get_widget("entry_url").get_text()
+        config["url"] = self.glade.get_widget("entry_url").get_text().strip()
         config["check_after_days"] = self.glade.get_widget("spin_check_days").get_value_as_int()
         config["load_on_start"] = self.glade.get_widget("chk_import_on_start").get_active()
         config["whitelisted"] = [ip[0] for ip in self.whitelist_model if ip[0] != 'IP HERE']