#!/bin/sh
echo 'Content-Type: text/html; charset=UTF-8'
echo
# stat -c %Y IP
# date +%s
cat <<_END1_
__HTML5__
<meta name="robots" content="follow, noindex"/>
__TITLE__
<style>
#itsup
{
color: #000000;
background-color: #22ee22;
font-size: 125%;
padding: 3em;
}
</style>
</head>
<body>
__NAVIGATION__
<main><div id="content">
__H1__
<p>
It's not always up or the IP address might be different,
so I'll (automatically) link to the right place below.
It's supposed to be on <a target="_blank" rel="noopener"
href="http://thinkpad.oskog97.com/">thinkpad.oskog97.com</a>
but... :-/
</p>
_END1_
stale_time=$(($(date +%s) - $(stat -c %Y IP)))
if [ $stale_time -lt 600 ]; then
IP=$(cat IP)
A=$(host thinkpad.oskog97.com | cut -d' ' -f4)
if [ "$A" = "$IP" ]; then
DNS_status="The thinkpad subdomain's A-record matches the IP address"
link="http://thinkpad.oskog97.com/"
else
DNS_status="<strong>The thinkpad subdomain needs to be updated!</strong>"
link="http://$IP/"
fi
cat <<_END2_
<div id="itsup">
<h2>It's up!</h2>
<p>IP: ${IP}</p>
<p>${DNS_status}</p>
<p><a href="$link" target="_blank" rel="noopener">Visit its website</a></p>
</div>
_END2_
else
link="https://web.archive.org/web/http://thinkpad.oskog97.com/"
echo " <p><a href='$link' rel='noopener' target='_blank'>Visit its website on archive.org</a></p>"
fi
cat <<_END3_
</div></main>
__FOOTER__
</body>
</html>
_END3_