How to display text with HTML-markup? (I use ckeditor)

Question

How to display text with HTML-markup? (I use ckeditor)

562 views Asked by Антон Игин At 30 December 2016 at 16:14

I heard about the filter |safe, but if I understood correctly, that's unsafe and creates a backdoor for injections.

What are the alternatives to display full posts with formatted text?

There are 1 answers

**binpy** · Accepted Answer · 2017-01-03 00:21:33

I think when you not use the filter of |safe, then output should return as text only with html markup (not rendered as html output).

But, if you need to exclude some dangerous tags such as <script>location.reload()</script>, you need to handle it with custom templatetag filter..

I got good answer from: https://stackoverflow.com/a/699483/6396981, via BeautifulSoup.

from bs4 import BeautifulSoup
from django import template
from django.utils.html import escape

register = template.Library()
INVALID_TAGS = ['script',]

def clean_html(value):
    soup = BeautifulSoup(value)
    for tag in soup.findAll(True):
        if tag.name in INVALID_TAGS:
            # tag.hidden = True # you also can use this.
            tag.replaceWith(escape(tag))
    return soup.renderContents()

# clean_html('<h1>This is heading</h1> and this one is xss injection <script>location.reload()</script>')
# output:
# <html><body><h1>This is heading</h1> and this one is xss injection &lt;script&gt;location.reload()&lt;/script&gt;</body></html>

@register.filter
def safe_exclude(text):
    # eg: {{ post.description|safe_exclude|safe }}
    return clean_html(text)

Hope it usefull..

TechQA.

How to display text with HTML-markup? (I use ckeditor)

There are 1 answers

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