gistfile1.txt

#!/usr/bin/env python

import os
import sys
import datetime
import math
import json

config = json.loads(open('/usr/syno/etc/ssl/ssl.info/server.info').read())

domain = config['domains']

not_after = os.popen("echo | openssl s_client -connect %s:8001 2>/dev/null |openssl x509 -text |grep 'Not After' |sed 's/.*Not After : //'" % (domain)).read().rstrip()[0:-4]

ts = datetime.datetime.strptime(not_after, '%b %d %H:%M:%S %Y')

remaining_days = int(math.floor((ts - datetime.datetime.now()).total_seconds() / 86400))

if remaining_days <= 28:
    os.system("/usr/syno/sbin/syno-letsencrypt renew-all -vv 1>/tmp/renew.stdout 2>/tmp/renew.stderr")