script to create a signature for identification_request api

create_signature.rb

#!/usr/bin/env ruby
require 'digest'
require 'cgi' 

secret_key = ARGV.pop
fields =%w(api_token callback_url face_url id_url nonce timestamp) 

ARGV.map!{|argv| CGI::escape(argv )}

puts Digest::HMAC.hexdigest(  fields.zip(ARGV).map!{ |pair| pair.join("=") }.join("?"),  
			      secret_key,
     			      Digest::SHA256) 
#  ruby ./signature.rb pippo http://localhost:12345/api https://media.licdn.com/mpr/mpr/shrink_200_200/p/4/005/088/341/1cf13a1.jpg http://www.plotprojects.com/wp-content/uploads/2015/02/xevent.jpg.pagespeed.ic.iEEoMX8ctX.jpg ciao 1438248110556 segreto