Some interesting Unicode URLs have recently been seen used in the wild – like in this billboard ad campaign from Coca Cola, and a friend of mine asked me about curl in reference to these and how it deals with such URLs.

(Picture by stevencoleuk)

I ran some tests and decided to blog my observations since they are a bit curious. The exact URL I tried was ‘www.

http://daniel.haxx.se/blog/2015/02/24/curl-smiley-urls-and-libc/