Re: Filtering html for django comments

To protect against injection, you *do* want to want to use the safe argument.

If you don't use the safe parameter, then the markdown filter will not escape any html in the input.

http://freewisdom.org/projects/python-markdown/Django

If you're not convinced, try including the following {{ text|markdown }} with and without the safe parameter!

text = """
<script>alert(boo!);</script>
**This is bold**
"""

Regards,

Alasdair


On 07/10/11 15:04, arkaitzj@gmail.com wrote:

Hi,
I am aware that Markdown is a formatting language like textile or any other.
It is just that i've seen other projects using {{var|markdown:"safe"}} to protect against injected html and I don't know if that is the same, better or worse that just {{var}} without disabling autoescape.

Thanks

--
Arkaitz

On Fri, Oct 7, 2011 at 2:50 PM, Tom Evans <tevans.uk@googlemail.com> wrote:

On Fri, Oct 7, 2011 at 9:00 AM, arkaitzj@gmail.com <arkaitzj@gmail.com> wrote:
> Hi all,
> I'm working on a comments addon for my app and I'm checking the alternatives
> for urlizing and securing what users write in comments.
> I thought that just using Djangos default autoescape( not doing anything)
> plus the |urlize filter like " {{comment|urlize}}" would be enough, but I've
> seen examples in the web using "{{comment|markdown:'safe'}}" so I was
> wondering if autoescape is not enough or people are using "markdown:'safe'"
> for other reasons?
>
> Should I be concerned if I don't use markdown:"safe" ?
>
> Thanks

Markdown is a formatting language. People using that syntax enter
their comments in markdown, and use that to turn them into HTML.

Cheers

Tom

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--  Alasdair Nicol Developer, MEMSET  mail: alasdair@memset.com  web: http://www.memset.com/  Memset Ltd., registration number 4504980. 25 Frederick Sanger Road, Guildford, Surrey, GU2 7YD, UK.