100 lines
3.3 KiB
Python
100 lines
3.3 KiB
Python
import bleach
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from bleach.css_sanitizer import CSSSanitizer
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from bleach.linkifier import LinkifyFilter
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import functools
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from files.helpers.regex import sanitize_url_regex, excessive_css_scale_regex
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from files.helpers.config.const import *
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allowed_tags = ('a','alpha','audio','b','big','blink','blockquote','br','center','code','del','details','em','g','gl','h1','h2','h3','h4','h5','h6','hr','i','img','li','lite-youtube','marquee','ol','p','pre','rp','rt','ruby','small','span','spoiler','strike','strong','sub','summary','sup','table','tbody','td','th','thead','tr','u','ul','video')
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allowed_tags_runtime = ('div', 'input', 'label', 'score', 'button', 'd')
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allowed_css_properties = ('background-color', 'color', 'filter', 'font-weight', 'text-align', 'transform')
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def allowed_attributes(tag, name, value):
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if name == 'style':
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value = value.lower()
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if 'transform' in value and 'scale' in value and excessive_css_scale_regex.search(value):
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return False
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return True
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if tag == 'marquee':
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if name in {'direction', 'behavior', 'scrollamount'}: return True
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if name in {'height', 'width'}:
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try: value = int(value.replace('px', ''))
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except: return False
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if 0 < value <= 250: return True
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if tag == 'a':
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if name == 'href' and '\\' not in value and 'xn--' not in value:
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return True
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if name == 'rel' and value == 'nofollow noopener': return True
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if name == 'target' and value == '_blank': return True
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if tag == 'img':
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if name in {'src','data-src'}: return is_safe_url(value)
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if name == 'loading' and value == 'lazy': return True
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if name == 'data-bs-toggle' and value == 'tooltip': return True
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if name in {'g','b','alpha','glow','party'} and not value: return True
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if name in {'alt','title'}: return True
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if name == 'class' and value == 'img': return True
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if name == 'data-user-submitted' and not value: return True
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if tag == 'lite-youtube':
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if name == 'params': return True
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if name == 'videoid': return True
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if tag == 'video':
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if name == 'controls' and value == '': return True
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if name == 'preload' and value == 'none': return True
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if name == 'src': return is_safe_url(value)
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if name == 'poster': return is_safe_url(value)
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if tag == 'audio':
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if name == 'src': return is_safe_url(value)
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if name == 'controls' and value == '': return True
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if name == 'preload' and value == 'none': return True
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if tag == 'p':
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if name == 'class' and value in {'mb-0','resizable','yt','text-center'}: return True
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if tag == 'span':
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if name == 'data-bs-toggle' and value == 'tooltip': return True
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if name == 'title': return True
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if name == 'alt': return True
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if name == 'cide' and not value: return True
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if name == 'bounce' and not value: return True
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if name == 'id': return True
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if tag == 'table':
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if name == 'class' and value == 'table': return True
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if tag in allowed_tags_runtime:
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return True
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return False
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def bleach_body_html(body_html, runtime=False):
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css_sanitizer = CSSSanitizer(allowed_css_properties=allowed_css_properties)
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tags = allowed_tags
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if runtime:
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tags += allowed_tags_runtime
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body_html = bleach.Cleaner(
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tags=tags,
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attributes=allowed_attributes,
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protocols=['http', 'https'],
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css_sanitizer=css_sanitizer,
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filters=[
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functools.partial(
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LinkifyFilter,
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skip_tags=["pre","code"],
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parse_email=False,
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url_re=sanitize_url_regex
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)
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]
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).clean(body_html)
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return body_html
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