check if 28C3 presale is online. add this as a cronjob.

presale-check.sh

#!/bin/sh

URLS="http://presale.events.ccc.de/ https://presale.events.ccc.de/"
MAILTO="foo@example.com bar@example.org"
TIMEOUT=10

for URL in $URLS; do
    DONEFILE=${PWD}/.urlcheckdone.$(echo ${URL} | sed -e 's/[^-[:alnum:]_]/_/g')
    [ -f ${DONEFILE} ] && continue

    if [ ! $(curl -s ${URL} --connect-timeout ${TIMEOUT} |wc -c) -eq 0 ]; then
        { cat << EOF
${URL} just came online!

Love,
your checkerbot.
EOF
        } | mail -s "${URL} online check" ${MAILTO}
        touch ${DONEFILE}
    fi
done