cancel active download and reset state if downloading again, fixes #187

oml/item/models.py

@@ -378,6 +378,10 @@ class Item(db.Model):
         u = state.user()
         if not u in self.users:
             t = Transfer.get_or_create(self.id)
+            if not t.added:
+                t.added = datetime.utcnow()
+                t.progress = 0
+                t.save()
             logger.debug('queue %s for download', self.id)
             self.add_user(u)
 

oml/nodes.py

@@ -332,6 +332,10 @@ class Node(Thread):
                     if since_ct > 1:
                         ct = datetime.utcnow()
                         t = Transfer.get(item.id)
+                        if not t.added:
+                            # transfer was canceled
+                            return False
+                        else:
                             t.progress = len(content) / item.info['size']
                             t.save()
                             trigger_event('transfer', {