file-store: don't response with cookies on file-store download.

rhodecode/apps/file_store/views.py

@@ -93,6 +93,9 b' class FileStoreView(BaseAppView):'
 
         file_path = self.storage.store_path(file_uid)
         return FileResponse(file_path)
+        # For file store we don't submit any session data, this logic tells the
+        # Session lib to skip it
+        setattr(self.request, '_file_response', True)
 
     @LoginRequired()
     @NotAnonymous()

rhodecode/lib/rc_beaker.py

@@ -32,10 +32,14 b' def BeakerSessionFactoryConfig(**options'
 
             def session_callback(request, response):
                 exception = getattr(request, 'exception', None)
-                if (exception is None or self._cookie_on_exception) and self.accessed():
+                file_response = getattr(request, '_file_response', None)
+
+                if file_response is None \
+                        and (exception is None or self._cookie_on_exception) \
+                        and self.accessed():
                     self.persist()
                     headers = self.__dict__['_headers']
-                    if headers['set_cookie'] and headers['cookie_out']:
+                    if headers.get('set_cookie') and headers.get('cookie_out'):
                         response.headerlist.append(('Set-Cookie', headers['cookie_out']))
             request.add_response_callback(session_callback)