tmp.rb

require 'rubygems'
require 'httpi'               # Use whatever http system you've already started using
require 'json'
require 'openssl'
require 'oj'

class Signature
  class << self
    def signature(rails_request)
      payload = "https://dashboard.atpay.com/email_transactions/" +
        rails_request.request_parameters.keys.sort.collect { |k|
          [k, rails_request.params[k]].join("")
       }.join("")

      sigs = []

      mandrill_keys = "Q6AsTVFGRDyKpdK_VrBaNw,d9cbV1rY9FKoZzDkPyBVnw,MdwJgD8yJDjYsrwMvRaTHA,63tyGd-l1FkpM4mnnlVXYg,L21ClyYjdKobv9X9KnRe_g".split(",")

      mandrill_keys.each do |x|
        sigs << Base64.encode64("#{OpenSSL::HMAC.digest('sha1', x, payload)}").strip
      end

      sigs
    end
  end
end


mandrill_events = <<EOD
[{"event":"inbound","msg":{}}]
EOD

puts mandrill_events

class RailsRequest < Struct.new(:request_parameters)
  def params
    request_parameters
  end
end

mandrill_events = Oj.dump(Oj.load(mandrill_events))
rails_request = RailsRequest.new({ mandrill_events: mandrill_events })
signature = Signature.signature(rails_request)

request = HTTPI::Request.new("https://dashboard.atpay.com/email_transactions/")

request.body = { mandrill_events: mandrill_events }
request.headers["X-Mandrill-Signature"] = "LnD7n+C2hxeoLVnLaMmIFE7EJ/s="
request.headers["HTTP_X_MANDRILL_SIGNATURE"] = "LnD7n+C2hxeoLVnLaMmIFE7EJ/s="
request.headers["X-Mandrill-Signature"] = signature
request.headers["HTTP_X_MANDRILL_SIGNATURE"] = signature

response = HTTPI.post(request)

puts response.code