wysiwyg_sanitizer.py

from re import sub
from django import template

register = template.Library()

@register.filter(name='cleanhtml')
def cleanhtml(value):
    """Removes all attributes from all HTML tags, but keeps <img> tags intact.
     Ideal for cleaning WYSIWYG-generated mess."""
    return sub('(<\w+(\ssrc=[\'"][\w:/\.-]+[\'"])?)[^>(/>)]*(>)', r'\1\2', str(value))

# Example usage: {{ article.content|cleanhtml|safe }}
# Issues: form elements such as inputs