SSLの証明書の期限をJSONで書き出すコード

ssl_check.rb

require 'json'
require 'date'

r = []

hosts = []

hosts.each{|host|
  if`sudo openssl x509 -in /etc/letsencrypt/live/#{host}/fullchain.pem -noout -dates` =~ /notAfter=(.+?)$/
    entry = {}
    entry[:host] = host
    entry[:expireDate] = $1
    expireDate = Date.parse($1)
    today = Date::today
    entry[:remainingDays] = (expireDate - today).to_i

    r.push(entry)
  end
}

json = {}
json[:data] = r
json[:lastUpdate] = Time.now.to_s