From https://www.reddit.com/r/C_Programming/comments/4p5ung/longs_we_wrote_a_url_shortener_in_c_with_wafer/d4iihi7 https://www.reddit.com/r/C_Programming/commen

From https://www.reddit.com/r/C_Programming/comments/4p5ung/longs_we_wrote_a_url_shortener_in_c_with_wafer/d4iihi7 https://www.reddit.com/r/C_Programming/comments/4p5ung/longs... $ curl -i http://lon.gs/abf HTTP/1.1 301 Moved Permanently Location: foo X-Evil-Header: evilvalue there were also examples of XSS and data URIs. (they claim to have fixed this elsewhere in the thread, but I guess some of the "evil" URLs still work)