56 lines
2 KiB
Python
56 lines
2 KiB
Python
# Taken from http://code.google.com/p/soclone/source/browse/trunk/soclone/utils/html.py
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"""Utilities for working with HTML."""
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import bleach
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from html5lib.filters.base import Filter
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import debug # pyflakes:ignore
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from django.utils.functional import keep_lazy
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from django.utils import six
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acceptable_tags = ('a', 'abbr', 'acronym', 'address', 'b', 'big',
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'blockquote', 'br', 'caption', 'center', 'cite', 'code', 'col',
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'colgroup', 'dd', 'del', 'dfn', 'dir', 'div', 'dl', 'dt', 'em', 'font',
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'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'ins', 'kbd',
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'li', 'ol', 'p', 'pre', 'q', 's', 'samp', 'small', 'span', 'strike',
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'strong', 'sub', 'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead',
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'tr', 'tt', 'u', 'ul', 'var')
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strip_completely = ['style', 'script', ]
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class StripFilter(Filter):
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def __iter__(self):
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open_tags = []
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for token in Filter.__iter__(self):
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if token["type"] in ["EmptyTag", "StartTag"]:
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open_tags.append(token["name"])
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if not set(strip_completely) & set(open_tags):
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yield token
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if token["type"] in ["EmptyTag", "EndTag"]:
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open_tags.pop()
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# Leave the stripping of the strip_completely tags to StripFilter
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bleach_tags = list(set(acceptable_tags) | set(strip_completely))
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cleaner = bleach.sanitizer.Cleaner(tags=bleach_tags, filters=[StripFilter], strip=True)
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def unescape(text):
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"""
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Returns the given text with ampersands, quotes and angle brackets decoded
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for use in URLs.
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This function undoes what django.utils.html.escape() does
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"""
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return text.replace(''', "'").replace('"', '"').replace('>', '>').replace('<', '<' ).replace('&', '&')
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def remove_tags(html, tags):
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"""Returns the given HTML sanitized, and with the given tags removed."""
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allowed = set(acceptable_tags) - set([ t.lower() for t in tags ])
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return bleach.clean(html, tags=allowed)
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remove_tags = keep_lazy(remove_tags, six.text_type)
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def sanitize_html(html):
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return cleaner.clean(html)
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