Zeep Mobile - Generating the authentication header - Ruby

gistfile1.rb

#!/usr/bin/env ruby -wKU

#  Created by Simon Wex (simon@zeepmobile.com) on 2008-07-12
#  Copyright (c) 2008. All rights reserved.
#  Released under MIT License

require 'openssl'
require 'base64'
require 'time'
require 'cgi'

API_KEY = 'cef7a046258082993759bade995b3ae8'
SECRET_ACCESS_KEY = '19c87eb3e3a28404e7ea8197d4401540'

# (ex. Sat, 12 Jul 2008 09:04:28 GMT)
http_date =  Time.now.httpdate

parameters = "user_id=1234&body=#{CGI.escape('Art thou not Romeo, and a Montague?')}"
# => "user_id=1234&body=Art+thou+not+Romeo%2C+and+a+Montague%3F"

canonical_string = "#{API_KEY}#{http_date}#{parameters}"
# => "cef7a046258082993759bade995b3ae8Sat, 12 Jul 2008 09:04:55 GMTuser_id=1234&body=Art+thou+not+Romeo%2C+and+a+Montague%3F"

digest = OpenSSL::Digest::Digest.new('sha1')

b64_mac = Base64.encode64(OpenSSL::HMAC.digest(digest, SECRET_ACCESS_KEY, canonical_string)).strip

authentication = "Zeep #{API_KEY}:#{b64_mac}"

puts authentication