Hi

I'm writing a site using catalyst, as a learning experience (though I hope something useful will come out of it eventually).

There is going to be user-submitted content and I want to allow formatting. I'm currently using Markdown but planning to allow a limited set of HTML to be entered too.

So rather than create my own html sanitising code, I looked through CPAN. I decided to use HTML::Defang as it looks the most thorough but I can't find much information about how it's been kept up to date. Does anyone know anything better, and is there a project to keep such things up to date in Perl?

There seem to be quite comprehensive and busy projects for similar things in PHP (HTML Purifier), Java and .NET (AntiSamy).

What does PerlMonks use? What do you use? At what point in the process do you sanitise the HTML?

I'm still reading through various resources such as ha.ckers.org/xss.html and it's definitely a complex topic...

Thanks in advance,

FalseVinylShrub

Disclaimer: Please review and test code, and use at your own risk... If I answer a question, I would like to hear if and how you solved your problem.

In reply to HTML cleanup of user submitted content by FalseVinylShrub

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.