Posting Image URLs

[sweinberg]

This addition to app/models/post.rb produces some false-positives. It prevents the submission of a link that has a blacklisted file extension anywhere in the URL at all, not just at the end of it.

This works to block direct image links like foo.com/bar.gif, but it also can block a legitimate link to an article which just happens to have 'gif' in the post title.

Try submitting this post: http://thelist.io/posts/new?u=http://nautil.us/blog/the-math-trick-behind-mp3s-jpegs-and-homer-simpsons-face&t=The%20Math%20Trick%20Behind%20MP3s,%20JPEGs,%20and%20Homer%20Simpson%E2%80%99s%20Face

Solution: Only block links with a blacklisted file extension located at the end of the URL, prefixed with a .