test.rb

require "json"
require 'certificate-transparency-client'
require "parallel"

ct = CT::Client.new "https://ct.example.org"
list = JSON.parse(File.read("all_logs_list.json"))
logs = list.dig("logs") || []
urls = logs.map { |log| "https://" + log.dig("url") }.map { |url| url[0..-2] }

Parallel.each(urls) do |url|
  ct = CT::Client.new(url)
  entries = ct.get_entries(0, 1023)
  p [url, entries.length]
rescue SocketError, EOFError, Net::OpenTimeout, OpenSSL::SSL::SSLError, Errno::ECONNREFUSED, CertificateTransparency::Client::HTTPError
  next
end