gistfile1.rb

module Puppet::Parser::Functions
 newfunction(:sshkeyfromdb, :type => :rvalue) do |args|
 	#local cache file on each puppetmaster
	ssh_keys_file = "/tmp/sshkeys"
	#URL to query
	host = "puppet"
	url = "/setting/ssh_keys?script=true"
	#Time to keep cache - e.g. 1 hours.
	ttl = (60 * 60)

	# create a cache file
	if not File.exist?(ssh_keys_file) or File.mtime(ssh_keys_file) < (Time.now - ttl)
	# cache miss, refreshing
		keys = Net::HTTP.get host,url
		File.new(ssh_keys_file,"w", 0600).write(keys)
	else
		keys = File.open(ssh_keys_file).read
	end
	return keys
 end
end