UA-.NETStandard/SampleApplications/Samples/GDS/ClientTest/Client.cs

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 *
 * OPC Foundation MIT License 1.00
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using Opc.Ua.Configuration;
using Opc.Ua.Gds.Client;
using System;
using System.Threading.Tasks;


namespace Opc.Ua.Gds.Test
{

    public class GlobalDiscoveryTestClient
    {
        GlobalDiscoveryServerClient m_gdsClient;
        ServerPushConfigurationClient m_pushClient;

        static bool autoAccept = false;

        public GlobalDiscoveryServerClient GDSClient { get { return m_gdsClient;  } }
        public ServerPushConfigurationClient PushClient { get { return m_pushClient; } }

        public GlobalDiscoveryTestClient(bool _autoAccept)
        {
            autoAccept = _autoAccept;
        }

        public async Task ConnectClient(bool gdsClient = true)
        {
            ApplicationInstance.MessageDlg = new ApplicationMessageDlg();
            ApplicationInstance application = new ApplicationInstance
            {
                ApplicationName = "Global Discovery Client",
                ApplicationType = ApplicationType.Client,
                ConfigSectionName = "Opc.Ua.GlobalDiscoveryTestClient"
            };

            // load the application configuration.
            ApplicationConfiguration config = await application.LoadApplicationConfiguration(false);

            // check the application certificate.
            bool haveAppCertificate = await application.CheckApplicationInstanceCertificate(false, 0);
            if (!haveAppCertificate)
            {
                throw new Exception("Application instance certificate invalid!");
            }

            config.CertificateValidator.CertificateValidation += new CertificateValidationEventHandler(CertificateValidator_CertificateValidation);

            // use same server for gds and push tests
            GlobalDiscoveryClientConfiguration gdsClientConfiguration = application.ApplicationConfiguration.ParseExtension<GlobalDiscoveryClientConfiguration>();
            if (gdsClient)
            {
                // get the configuration.
                m_gdsClient = new GlobalDiscoveryServerClient(application, gdsClientConfiguration);
                m_gdsClient.EndpointUrl = gdsClientConfiguration.GlobalDiscoveryServerUrl;
            }
            else
            {
                m_pushClient = new ServerPushConfigurationClient(application);
                m_pushClient.EndpointUrl = gdsClientConfiguration.GlobalDiscoveryServerUrl;
            }
        }

        public void DisconnectClient()
        {
            Console.WriteLine("Disconnect Session. Waiting for exit...");

            if (m_gdsClient != null)
            {
                GlobalDiscoveryServerClient gdsClient = m_gdsClient;
                m_gdsClient = null;
                gdsClient.Disconnect();
            }

            if (m_pushClient != null)
            {
                ServerPushConfigurationClient pushClient = m_pushClient;
                m_pushClient = null;
                pushClient.Disconnect();
            }

        }


        private static void CertificateValidator_CertificateValidation(CertificateValidator validator, CertificateValidationEventArgs e)
        {
            if (e.Error.StatusCode == StatusCodes.BadCertificateUntrusted)
            {
                e.Accept = autoAccept;
                if (autoAccept)
                {
                    Console.WriteLine("Accepted Certificate: {0}", e.Certificate.Subject);
                }
                else
                {
                    Console.WriteLine("Rejected Certificate: {0}", e.Certificate.Subject);
                }
            }
        }


    }
}