Monitor the Last-Modified HTTP header on www.aclfestival.com. Designed for Mac OS X.

acl-monitor.sh

#!/bin/bash

# $1 = recipient
# $2 = The Subject
# $3 = The message content
sendapplemail() {
/usr/bin/osascript >/dev/null 2>&1  <<EOF
    tell application "Mail"
        set myContent to quoted form of "$3"
        set theMessage to make new outgoing message with properties {subject:"$2", content:myContent, sender:"Steve Brokaw <steve@jetseven.org>"}
        tell theMessage
            make new to recipient at end of to recipients with properties {address:"$1"}
        end tell
        set theResult to send theMessage
    end tell
EOF
}

updatetime() {
    curl -A 'Mozilla/5.0 (Windows; U; Windows NT 6.1; rv:2.2) Gecko/20110201' -sI http://www.aclfestival.com | sed -n 's/^Last-Modified\:\ \(.*$\)/\1/p'
}

LAST_UPDATED=$(updatetime)
echo -n "Starting to check at: "
date -u
echo "Last updated: ${LAST_UPDATED}"

PREVIOUS_UPDATE=$LAST_UPDATED

while true
do
    if [[ $PREVIOUS_UPDATE != $LAST_UPDATED ]]
    then
        echo "^GChange Detected: $LAST_UPDATED"
        say "ACL website change detected" &
        PREVIOUS_UPDATE=$LAST_UPDATED
        CONTENT=$(curl -s http://www.aclfestival.com | grep -C 2 Souvenir | sed 's/\"//g')
        if [[ ! $CONTENT =~ "Coming Soon" ]]
        then
           sendapplemail "##########@txt.att.net" "ACL HIGH ALERT!" "Check www.aclfestival.com NOW!" &
           sendapplemail "email@example.com" "ALERT aclfestival.com was updated $LAST_UPDATED" "$CONTENT" &
        else
            sendapplemail "email@example.com" "aclfestival.com was updated $LAST_UPDATED" "$CONTENT" &
        fi
    fi
    sleep 60
    LAST_UPDATED=$(updatetime)
done