/// <summary>
/// Create a session with the given UA server
/// </summary>
/// <param name="discoveryUrl"></param>
/// <param name="configSection"></param>
/// <returns></returns>
public static Session CreateSession(string discoveryUrl, string configSection)
{
// Step 1 -- Load configuration
ApplicationConfiguration configuration = ApplicationConfiguration.Load(configSection, ApplicationType.Client);
ClientUtils.CheckApplicationInstanceCertificate(configuration);
// Step 2 -- Select an endpoint
// create the endpoint description
EndpointDescription endpointDescription = ClientUtils.SelectEndpoint(discoveryUrl, false);
endpointDescription.SecurityMode = MessageSecurityMode.None;
endpointDescription.SecurityPolicyUri = @"http://opcfoundation.org/UA/SecurityPolicy#None";
// create the endpoint configuration
EndpointConfiguration endpointConfiguration = EndpointConfiguration.Create(configuration);
// the default timeout for a requests sent using the channel.
endpointConfiguration.OperationTimeout = 600000;
// create the endpoint.
ConfiguredEndpoint endpoint = new ConfiguredEndpoint(null, endpointDescription, endpointConfiguration);
// choose the encoding strategy: true: BinaryEncoding; false: XmlEncoding
endpoint.Configuration.UseBinaryEncoding = true;
// create the binding factory.
BindingFactory bindingFactory = BindingFactory.Create(configuration, configuration.CreateMessageContext());
// update endpoint description using the discovery endpoint.
if (endpoint.UpdateBeforeConnect)
{
endpoint.UpdateFromServer(bindingFactory);
//Console.Error.WriteLine("Updated endpoint description for url: {0}\n", endpointDescription.EndpointUrl);
endpointDescription = endpoint.Description;
endpointConfiguration = endpoint.Configuration;
}
X509Certificate2 clientCertificate = configuration.SecurityConfiguration.ApplicationCertificate.Find();
// set up a callback to handle certificate validation errors.
configuration.CertificateValidator.CertificateValidation += new CertificateValidationEventHandler(CertificateValidator_CertificateValidation);
// Step 3 -- Initialize the channel which will be created with the server.
SessionChannel channel = SessionChannel.Create(
configuration,
endpointDescription,
endpointConfiguration,
bindingFactory,
clientCertificate,
null);
// Step 4 -- Create a session
Session session = new Session(channel, configuration, endpoint);
session.ReturnDiagnostics = DiagnosticsMasks.All;
string sessionName = "SenderSession";
UserIdentity identity = new UserIdentity(); // anonymous
session.KeepAlive += new KeepAliveEventHandler(Session_KeepAlive);
session.Open(sessionName, identity);
return(session);
}