stream download after headers

server/portal_server.js

@@ -63,8 +63,6 @@ app.get('/assets/download/:id', (req, res) => {
           'Content-Type': 'application/octet-stream',
           'Content-Length': contentLength
         });
-      });
-
         let file_stream = storage.get(id);
 
         file_stream.on(notLocalHost ? 'finish' : 'close', () => {
@@ -76,6 +74,7 @@ app.get('/assets/download/:id', (req, res) => {
         });
 
         file_stream.pipe(res);
+      });
     })
     .catch(err => {
       res.sendStatus(404);