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News download: Remove all link and meta tags

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These can have various ill effects
This commit is contained in:
Kovid Goyal 2021-08-13 20:44:08 +05:30
parent 72bfb00300
commit bb71434797
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1 changed files with 6 additions and 5 deletions
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11
src/calibre/web/feeds/news.py
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@ -1007,14 +1007,15 @@ class BasicNewsRecipe(Recipe):
for o in soup.findAll(onload=True):
del o['onload']
for script in list(soup.findAll('noscript')):
script.extract()
for attr in self.remove_attributes:
for x in soup.findAll(attrs={attr:True}):
del x[attr]
for base in list(soup.findAll(['base', 'iframe', 'canvas', 'embed',
'command', 'datalist', 'video', 'audio'])):
base.extract()
for bad_tag in list(soup.findAll(['base', 'iframe', 'canvas', 'embed',
'command', 'datalist', 'video', 'audio', 'noscript', 'link', 'meta'])):
# link tags can be used for preloading causing network activity in
# calibre viewer. meta tags can do all sorts of crazy things,
# including http-equiv refresh, viewport shenanigans, etc.
bad_tag.extract()
# srcset causes some viewers, like calibre's to load images from the
# web, and it also possible causes iBooks on iOS to barf, see
# https://bugs.launchpad.net/bugs/1713986