Comment on why we clone

2016-08-02 18:41:22 +01:00 · 2016-08-02 18:41:22 +01:00 · 6b58ade2f0
parent 9e66c58ceb
commit 6b58ade2f0
1 changed files with 1 additions and 0 deletions
--- a/synapse/rest/media/v1/preview_url_resource.py
+++ b/synapse/rest/media/v1/preview_url_resource.py
@ -334,6 +334,7 @@ class PreviewUrlResource(Resource):

                # We don't just use XPATH here as that is slow on some machines.

+                # We clone `tree` as we modify it.
                cloned_tree = deepcopy(tree.find("body"))

                TAGS_TO_REMOVE = ("header", "nav", "aside", "footer", "script", "style",)