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53 lines
1.2 KiB
Python
53 lines
1.2 KiB
Python
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# strip out a set of nuisance html attributes that can mess up rendering in RSS feeds
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import re
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from lxml.html.clean import Cleaner
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bad_attrs = ["width", "height", "style", "[-a-z]*color", "background[-a-z]*", "on*"]
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single_quoted = "'[^']+'"
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double_quoted = '"[^"]+"'
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non_space = "[^ \"'>]+"
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htmlstrip = re.compile(
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"<" # open
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"([^>]+) " # prefix
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"(?:%s) *" % ("|".join(bad_attrs),)
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+ "= *(?:%s|%s|%s)" # undesirable attributes
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% (non_space, single_quoted, double_quoted)
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+ "([^>]*)" # value # postfix
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">", # end
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re.I,
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)
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def clean_attributes(html):
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while htmlstrip.search(html):
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html = htmlstrip.sub("<\\1\\2>", html)
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return html
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def normalize_spaces(s):
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if not s:
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return ""
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"""replace any sequence of whitespace
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characters with a single space"""
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return " ".join(s.split())
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html_cleaner = Cleaner(
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scripts=True,
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javascript=True,
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comments=True,
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style=True,
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links=True,
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meta=False,
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add_nofollow=False,
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page_structure=False,
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processing_instructions=True,
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embedded=False,
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frames=False,
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forms=False,
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annoying_tags=False,
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remove_tags=None,
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remove_unknown_tags=False,
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safe_attrs_only=False,
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)
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