36 lines
1014 B
Python
36 lines
1014 B
Python
import bleach
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allowed_tags = [
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'a', 'img', # links and images
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'br', 'p', 'span', 'blockquote', # text layout
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'strike', 'strong', 'u', 'em', 'sup', 'sub', 'pre', # text formatting
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'h1', 'h2', 'h3', 'h4', 'h5', 'h6', # headings
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'ol', 'ul', 'li', # lists
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'table', 'caption', 'thead', 'tbody', 'th', 'tr', 'td', # tables
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]
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allowed_attributes = {
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'*': ['class', 'style'],
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'img': ['alt', 'src', 'title'],
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'a': ['href', 'title'],
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'th': ['scope'],
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'ol': ['start'],
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}
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allowed_styles = [
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'color', 'background-color', 'height', 'width', 'text-align'
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]
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def validate_html(html):
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"""
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This method takes a string and escapes all non-whitelisted html entries.
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Every field of a model that is loaded trusted in the DOM should be validated.
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"""
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if isinstance(html, str):
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return bleach.clean(
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html,
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tags=allowed_tags,
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attributes=allowed_attributes,
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styles=allowed_styles)
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else:
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return html
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