Currently I am using a CKEditor text editor. It escape's html but I want to prevent it from server side.
What is the best way to prevent XSS When we are using Text Editor in Python/Django?
Automatically or explicitly escape your output in templates, e.g.
{% autoescape on %}
{{ body }}
{% endautoescape %}
or
{{ body|escape }}
If you want to only escape JavaScript the "right" way to do it would be to convert the HTML to DOM, walk the tree of nodes, and remove any script elements. A less elegant and imperfect solution would be to use a regular expression to replace any script tags.
Related
Problem:
{% extends 'base.html' %} {% block title %} Dashboard {% endblock %} {% block pagetitle %}
becomes
{% extends 'base.html' %} {% block title %} Dashboard {% endblock %} {% block
pagetitle %}
Note that the {% tag %} is being broken with a new line. This causes syntax errors with django templates.
I've tried most top django template extensions and this does not fix the issue.
I've also tried these settings:
"[html]": {
"editor.formatOnSave": false,
},
"html.format.wrapLineLength": 0,
"html.format.enable": false,
"prettier.disableLanguages": ["html"]
Desired Behavior:
Automatically format *.html files, while preserving django template tags, not breaking them up with newlines.
Sub-optimal (but acceptable) behavior: don't format *.html files at all.
I had the same issue and the only way I found that solved it is to disable the default HTML formatter. Unfortunately, I did not find a way to make it format Django template tags correctly. You can do the same if you go to VS Code Preferences > Settings > User > Extensions > HTML and uncheck 'Enable/disable default HTML formatter'.
I solved this by following this advice: https://stackoverflow.com/a/73892745/1257347
TLDR: install the djLint extension (and remember to do $ pip install djlint)
I got it to work by simply adding {{""}} between the {% tag %} that were being broken.
Example:
{% extends 'main/base.html' %} {% block title_block %}Homepage{% endblock%}
{{""}} {%block style_ref_block%}{%endblock%} {{""}} {% block body_block %}
This Didn't work for me.
The hack I found was to set the vscode language to jinja instead of the auto detected html
reference
I've also just experienced vs-code misbehaving on django template tags (i.e. deleting curly braces).
I don't like the idea of disabling HTML formatting just to support templates (i.e. vs-code Preferences/Settings/Extensions/HTML: disable (uncheck) "HTML>Format:Enable"). This is arguably a step backwards, but it does stop vs-code misbehaving.
Instead, I chose to install (vs-code Preferences/Extensions) the 'Django' extension, by Baptiste Darthenay. This was a better way to go, because it works, gracefully, preserves native vs-code HTML formatting, and includes a nice set of django snippits, which saves me keystrokes when embedding template code. Tada!
BTW, before finding Baptiste's awesome extension, I also tried keeping vs-code HTML formatting enabled, AND enabling 'HTML>Format:Templating', which promised to "Honor django and other templating language tags"; it did not.
I try to Truncates the string and remove the html tags,
First, when I write it this way.
{{ post.context|safe }}
or
{{ post.context |truncatechars:100 }}
The left navigation bar shows normal.
But when I write this, this part of the HTML is gone.
{{ post.context |truncatechars:100|safe }}
But I can still find this Html in the source code.
So what can I do to get the correct results?thank you
If you just want to safely show content with HTML formatting.
{{ post.context|safe }}
If you truncate then some HTML tags may not get closed tag and you will get an irregular view.
If you want to strip HTML tags, you can strip by striptags and truncate characters using slice filters.
{{post.context|striptags|slice:':300'}}
Although it's kinda late to answer if you want to show the safe code with tags then use {{ post.context|truncatewords_html:30|safe }} or {{ post.content|truncatechars_html:100|safe }}. This won't break your code and will display your desired content.
No need to struggle around. You need to combine truncate, safe, and striptags
Respect the order below:
{{ string_variable|striptags|safe|truncate(100) }}
Does that help you?
With Django, is it possible for users to submit HTML in a form field, save it, and then render the HTML in the template?
An example is a user adding a link within a textfield that should then be rendered as an a tag within the rest of the text.
The user would input something like :
this is a site called SO.
The SO link would be a link instead of rendering it as text.
Django escapes by default. You can mark a string as safe via a filter or tag to prevent the auto escaping behavior.
{{ my_text_with_html|safe }}
{% autoescape off %}
{{ my_test_with_html }}
{% endautoescape %}
If you accept user inputted html, you'll want to sanitize it so they can't write scripts and such.. for that, just search python html sanitizing and apply it before sending the data to the template.
Python HTML sanitizer / scrubber / filter
You can tell Django the HTML is safe by marking it with the appropriate filter:
{{ variable|safe }}
You can also use the autoescape tag to disable the autoescaping:
{% autoescape off %}
{{ variable }}
{% endautoescape %}
However, in case you are enabling this feature for other (unknown) users, I highly recommend using something else, since HTML can be quite a pain to properly sanitize from Javascript or other HTML-things you don't want (e.g., on*-arguments etc). Django actually ships with basic support for some markup languages you can provide to your users. I guess markdown is being the most popular.
I want to add to the way html is indented in vim. I'm doing django development and I would like to indent whenever a django template tag is used. Currently, using filetype indent, it does not indent after the template tags. So currently my code looks like this:
{% do_something %}
<div>
<p>Hello</p>
</div>
{% end %}
And I'd like for it to recognize the {% %} as a tag and indent like so:
{% do_something %}
<div>
<p>Hello</p>
</div>
{% end %}
Is there a filetype plugin for this or a way I can add {% %} to the list of things that should be indented after?
When you have filetype indent on for an html file it will use the indenting rules found in the ../vim/vim73/indent subdirectory in file html.vim.
The braces you want to use as signaling indent of next line are, I'm sure, not treated in html.vim because they're not part of html. You can alter the rules in html.vim to get it done the way you want.
See :h indent-expr for a bit of info and you will also want to look at other files in the /indent directory to see how it works.
There is an alternate html.vim you can get at vim website, maybe it is better than html.vim that ships with Vim:
http://www.vim.org/scripts/script.php?script_id=2075
There is a pending pull request for the django.vim project to include an alternative django-custom vim implementation from Steve Losh. This works, for the most part, better than the default one.
I use django feed framework to organize rss feeds for my website.
I need to put some hyperlinks to feed items, but al of them are
autoescaped ( "<" is replaced with "<" and so on).
Is it possible to keep tags in my feed (as I understand, I can't use
{% autoescape off %} tag in feed templates)?
Thanks.
Read up on Automatic HTML escaping in Django and try the following syntax. Where data is the variable which holds your link
{{ data|safe }}
As jitter mentioned you can use "safe" filter, but it's annoying if you want to disable autoescaping often. Django also supports {% autoescape off %} {% autoescape end %} blocks, everything inside is block won't be autoescaped.
EDITED: Sorry, I haven't read your question completely only title :). Why you can't use autoescape tag in feeds? There's no restriction about it.