markdown.py
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markdown.py
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	"""Bleached Markdown functionality.

	This is for user-generated stuff, like comments.
	"""

	from __future__ import absolute_import

	import bleach
	import markdown as _markdown

	ALLOWED_TAGS = [
	'a',
	'abbr',
	'acronym',
	'b', 'strong',
	'i', 'em',
	'blockquote',
	'code',
	'li', 'ol', 'ul',
	'h1', 'h2', 'h3', 'h4', 'h5', 'h6',
	'p',
	'img',
	]

	ALLOWED_ATTRIBUTES = {
	'a': ['href', 'title', 'target'],
	'abbr': ['title'],
	'acronym': ['title'],
	'img': ['src', 'alt', 'width', 'height', 'title'],
	'*': ['style'],
	}

	ALLOWED_STYLES = [
	'color', 'font-weight', 'background-color',
	]


	def markdown(s):
	tainted_html = _markdown.markdown(s)
	safe_html = bleach.clean(tainted_html,
	tags=ALLOWED_TAGS,
	attributes=ALLOWED_ATTRIBUTES,
	styles=ALLOWED_STYLES)
	return safe_html