soap_client_example.rb

require 'savon'

module Foobarservice
  class Client
    attr_accessor :wsdl, :user_id, :token

    def initialize(attrs = {})
      attrs.each do |k,v| send("#{k}=", v) end

      @client = Savon.client(wsdl: @wsdl) do
        convert_request_keys_to :none
      end
    end

    def call(operation, msg = {})
      response = @client.call(
        operation,
        soap_header: {
          verifyingToken: {
            UserID: @user_id,
            Token:  @token
          }
        },
        message: msg
      )
      response.body["#{operation}_response".to_sym][:return]
    end

  end
end