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by John Topley.
Original Post: Rails Tip #12: Easy HTML Input Validation
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Not really a Rails-specific tip this one, more of a Ruby tip presented in a Rails’ context. Let’s imagine that your application accepts user input and you’re using HTML whitelisting to allow through a limited number of HTML elements, such as <a>, <strong>, <em> etc. This is fine, but you’ll also want to ensure that [...]
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