~ go get github.com/jhaals/urlstat

    ~ urlstat --help
    usage: urlstat [<flags>] <urls>...

    Monitor URLs for state changes

    Flags:
      --help           Show context-sensitive help (also try --help-long and
                       --help-man).
    -d, --diff         Display content diff
    -c, --content      Check for changes in content
    -i, --interval=1s  Interval between checks.
    -t, --timeout=1s   HTTP GET timeout.
      --version        Show application version.

    Args:
    <urls>  URLs to monitor

    ~ urlstat http://127.0.1:8000/index.html --content
    Checking http://127.0.1:8000/index.html with 1s interval. Inital Status 404
    2016/01/04 14:50:28 http://127.0.1:8000/index.html status code changed from 404 to 200
    2016/01/04 14:50:28 http://127.0.1:8000/index.html content changed
    2016/01/04 14:50:44 http://127.0.1:8000/index.html content changed