gistfile1.http

    curl --head -i https://api.github.com/users/jasonh-n-austin -H "If-Modified-Since: Tue, 12 Feb 2013 02:58:46 GMT"
    HTTP/1.1 304 Not Modified
    Server: GitHub.com
    Date: Thu, 14 Feb 2013 04:52:32 GMT
    Connection: keep-alive
    Status: 304 Not Modified
    X-RateLimit-Limit: 60
    X-RateLimit-Remaining: 50
    Vary: Accept
    Cache-Control: public, max-age=60, s-maxage=60
    Last-Modified: Tue, 12 Feb 2013 02:58:46 GMT
    X-Content-Type-Options: nosniff