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Fix crash in url preview when html tag has no text

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Signed-off-by: Marcin Bachry <hegel666@gmail.com>
This commit is contained in:
Marcin Bachry 2016-12-14 22:38:18 +01:00
parent c3208e45c9
commit 24c16fc349
2 changed files with 54 additions and 1 deletions
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5
synapse/rest/media/v1/preview_url_resource.py
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@ -381,7 +381,10 @@ def _calc_og(tree, media_uri):
if 'og:title' not in og:
# do some basic spidering of the HTML
title = tree.xpath("(//title)[1] | (//h1)[1] | (//h2)[1] | (//h3)[1]")
og['og:title'] = title[0].text.strip() if title else None
if title and title[0].text is not None:
og['og:title'] = title[0].text.strip()
else:
og['og:title'] = None
if 'og:image' not in og:
# TODO: extract a favicon failing all else