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Merge pull request #872 from matrix-org/erikj/preview_url_fixes

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Fix some `/preview_url` explosions
This commit is contained in:
Erik Johnston 2016-06-16 10:08:29 +01:00 committed by GitHub
commit 1f31381611
1 changed files with 6 additions and 5 deletions
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9
synapse/rest/media/v1/preview_url_resource.py
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@ -252,6 +252,7 @@ class PreviewUrlResource(Resource):
og = {} og = {}
for tag in tree.xpath("//*/meta[starts-with(@property, 'og:')]"): for tag in tree.xpath("//*/meta[starts-with(@property, 'og:')]"):
if 'content' in tag.attrib:
og[tag.attrib['property']] = tag.attrib['content'] og[tag.attrib['property']] = tag.attrib['content']
# TODO: grab article: meta tags too, e.g.: # TODO: grab article: meta tags too, e.g.:
@ -279,7 +280,7 @@ class PreviewUrlResource(Resource):
# TODO: consider inlined CSS styles as well as width & height attribs # TODO: consider inlined CSS styles as well as width & height attribs
images = tree.xpath("//img[@src][number(@width)>10][number(@height)>10]") images = tree.xpath("//img[@src][number(@width)>10][number(@height)>10]")
images = sorted(images, key=lambda i: ( images = sorted(images, key=lambda i: (
-1 * int(i.attrib['width']) * int(i.attrib['height']) -1 * float(i.attrib['width']) * float(i.attrib['height'])
)) ))
if not images: if not images:
images = tree.xpath("//img[@src]") images = tree.xpath("//img[@src]")
@ -287,9 +288,9 @@ class PreviewUrlResource(Resource):
og['og:image'] = images[0].attrib['src'] og['og:image'] = images[0].attrib['src']
# pre-cache the image for posterity # pre-cache the image for posterity
# FIXME: it might be cleaner to use the same flow as the main /preview_url request # FIXME: it might be cleaner to use the same flow as the main /preview_url
# itself and benefit from the same caching etc. But for now we just rely on the # request itself and benefit from the same caching etc. But for now we
# caching on the master request to speed things up. # just rely on the caching on the master request to speed things up.
if 'og:image' in og and og['og:image']: if 'og:image' in og and og['og:image']:
image_info = yield self._download_url( image_info = yield self._download_url(
self._rebase_url(og['og:image'], media_info['uri']), requester.user self._rebase_url(og['og:image'], media_info['uri']), requester.user