mirror of
https://github.com/bookwyrm-social/bookwyrm.git
synced 2024-05-31 22:58:18 +00:00
57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
""" html validation on rendered templates """
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from html.parser import HTMLParser
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from tidylib import tidy_document
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def validate_html(html):
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"""run tidy on html"""
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_, errors = tidy_document(
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html.content,
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options={
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"drop-empty-elements": False,
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"warn-proprietary-attributes": False,
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},
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)
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# idk how else to filter out these unescape amp errs
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errors = "\n".join(
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e
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for e in errors.split("\n")
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if "&book" not in e
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and "&type" not in e
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and "&resolved" not in e
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and "id and name attribute" not in e
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and "illegal characters found in URI" not in e
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and "escaping malformed URI reference" not in e
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)
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if errors:
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raise Exception(errors)
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validator = HtmlValidator()
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# will raise exceptions
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validator.feed(str(html.content))
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class HtmlValidator(HTMLParser): # pylint: disable=abstract-method
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"""Checks for custom html validation requirements"""
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def __init__(self):
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HTMLParser.__init__(self)
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def handle_starttag(self, tag, attrs):
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"""check if the tag is valid"""
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# filter out everything besides links that open in new tabs
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if tag != "a" or ("target", "_blank") not in attrs:
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return
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for attr, value in attrs:
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if (
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attr == "rel"
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and "nofollow" in value
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and "noopener" in value
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and "noreferrer" in value
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):
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return
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raise Exception(
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'Links to a new tab must have rel="nofollow noopener noreferrer"'
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)
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