Michael Kennedy on Technology

[The code for this post is available on GitHub]

This article covers the various ways in which you might handle text encoding in ASP.NET MVC. For example, if you were writing a forum web app, you should absolutely be paranoid about what your users are typing into your site. You need to be very careful about how you redisplay their input. For example, a friendly forum user might write something like:

Nice post, thanks for sharing!

On the other hand, they may write:


xss.doBadDeeds();

If you turn around and show this “post” to your other uses, maybe they’ll get hacked. At a minimum, the evil-doers could be a nuisance to your real users.

On the other hand, if you’re building a CMS or utility helper method, you do not want to filter out the HTML a user might type. They probably need to enter some HTML which you’ll…

View original post 593 more words

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