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Comment on why we clone

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This commit is contained in:
Erik Johnston 2016-08-02 18:41:22 +01:00
parent 9e66c58ceb
commit 6b58ade2f0
1 changed files with 1 additions and 0 deletions
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synapse/rest/media/v1/preview_url_resource.py
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@ -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",)