gistfile1.txt

# imgur redirecting direct image links from t.co on the first click ?
# A subsequent visit in the same browser seems to work fine, so maybe
# they remember it via the cookie.

# 1. See i.imgur.com/foo.jpg link in a tweet.
# 2. Visit it with a redirect through t.co.
# 3. See imgur.com/foo page instead of just the image.
# 4. Visit the same link from (1) again.
# 5. See the regular image at i.imgur.com/foo.jpg, as usual.

$ curl -I -H "Referer: http://t.co/6UIhFkZMGD" http://i.imgur.com/wKcDVoo.jpg
HTTP/1.1 302 Moved Temporarily
Server: cloudflare-nginx
Date: Wed, 07 Aug 2013 16:43:46 GMT
Content-Type: text/html
Content-Length: 165
Connection: keep-alive
Location: http://imgur.com/wKcDVoo

$ curl -I http://i.imgur.com/wKcDVoo.jpg
HTTP/1.1 200 OK
Server: cloudflare-nginx
Date: Wed, 07 Aug 2013 16:43:52 GMT
Content-Type: image/jpeg
Content-Length: 142565
# ...