get preview in tasks

oml/nodes.py

@@ -369,12 +369,11 @@ class Node(Thread):
                 return True
             except:
                 logger.debug('preview download failed %s', url, exc_info=1)
-                return False
         elif code == 404:
             pass
         else:
             logger.debug('FAILED %s', url)
-            return False
+        return False
 
     def download_upgrade(self, release):
         for module in release['modules']:
@@ -422,7 +421,6 @@ class Nodes(Thread):
         Thread.__init__(self)
         self.daemon = True
         self.start()
-        self.pull()
 
     def cleanup(self):
         if self._running and self._local:
@@ -519,6 +517,8 @@ def update_online():
             'id': settings.USER_ID,
             'online': state.online
         })
+        if state.online and state.nodes:
+            state.nodes.pull()
 
     if settings.OLD_USER_ID and not settings.server.get('migrated_id', False):
         from . import directory