# File lib/openstack/connection.rb, line 262
  def initialize(connection)

    tries = connection.retries
    time = 3

    begin
      server = Net::HTTP::Proxy(connection.proxy_host, connection.proxy_port).new(connection.auth_host, connection.auth_port)
      if connection.auth_scheme == "https"
        server.use_ssl = true
        server.verify_mode = OpenSSL::SSL::VERIFY_NONE
      end
      server.start
    rescue
      puts "Can't connect to the server: #{tries} tries  to reconnect" if connection.is_debug
      sleep time += 1
      retry unless (tries -= 1) <= 0
      raise OpenStack::Exception::Connection, "Unable to connect to  #{server}"
    end

    @uri = String.new

    case connection.auth_method
      when "password"
        auth_data = JSON.generate({ "auth" =>  { "passwordCredentials" => { "username" => connection.authuser, "password" => connection.authkey }, connection.authtenant[:type] => connection.authtenant[:value]}})
      when "rax-kskey"
        auth_data = JSON.generate({"auth" => {"RAX-KSKEY:apiKeyCredentials" => {"username" => connection.authuser, "apiKey" => connection.authkey}}})
      when "key"
        auth_data = JSON.generate({"auth" => { "apiAccessKeyCredentials" => {"accessKey" => connection.authuser, "secretKey" => connection.authkey}, connection.authtenant[:type] => connection.authtenant[:value]}})
      else
        raise Exception::InvalidArgument, "Unrecognized auth method #{connection.auth_method}"
    end

    response = server.post(connection.auth_path.chomp("/")+"/tokens", auth_data, {'Content-Type' => 'application/json'})
    if (response.code =~ /^20./)
      resp_data=JSON.parse(response.body)
      connection.authtoken = resp_data['access']['token']['id']
      implemented_services = resp_data["access"]["serviceCatalog"].inject([]){|res, current| res << current["type"] ;res}
      raise OpenStack::Exception::NotImplemented.new("The requested service: \"#{connection.service_type}\" is not present " +
        "in the returned service catalogue.", 501, "#{resp_data["access"]["serviceCatalog"]}") unless implemented_services.include?(connection.service_type)
      resp_data['access']['serviceCatalog'].each do |service|
        service["endpoints"].each do |endpoint|
          connection.regions_list[endpoint["region"]] ||= []
          connection.regions_list[endpoint["region"]] << {:service=>service["type"], :versionId => endpoint["versionId"]}
        end
        if connection.service_name
          check_service_name = connection.service_name
        else
          check_service_name = service['name']
        end
        if service['type'] == connection.service_type and service['name'] == check_service_name
          endpoints = service["endpoints"]
          if connection.region
            endpoints.each do |ep|
              if ep["region"] and ep["region"].upcase == connection.region.upcase
                @uri = URI.parse(ep["publicURL"])
              end
            end
          else
            @uri = URI.parse(endpoints[0]["publicURL"])
          end
          if @uri == ""
            raise OpenStack::Exception::Authentication, "No API endpoint for region #{connection.region}"
          else
            if @version #already got one version of endpoints
              current_version = get_version_from_response(service)
              if @version.to_f > current_version.to_f
                next
              end
            end
            #grab version to check next time round for multi-version deployments
            @version = get_version_from_response(service)
            connection.service_host = @uri.host
            connection.service_path = @uri.path
            connection.service_port = @uri.port
            connection.service_scheme = @uri.scheme
            connection.authok = true
          end
        end
      end
    else
      connection.authtoken = false
      raise OpenStack::Exception::Authentication, "Authentication failed with response code #{response.code}"
    end
    server.finish if server.started?
  end