Nagios check_http is unable to follow cookies (and redirects) - so this little helper script does the job

check_http_with_cookie.sh

#!/bin/bash
rm -f /tmp/tmp_file
wget -qO- --keep-session-cookies --save-cookies /tmp/cookies.txt https://.......... > /tmp/tmp_file
if grep -Fq "$1" /tmp/tmp_file
then
    # code if found
    echo $1 found  
    exit 0
else
    echo $1 not found
    exit 2
    # code if not found
fi