public async Task ValidateCertificateExisting()
{
using (var dirServer = TempDirectory.Create("Server"))
using (var dirClient = TempDirectory.Create("Client"))
{
var storeServer = new DirectoryStore(dirServer.Name, createLocalCertificateIfNotExist: true);
var storeClient = new DirectoryStore(dirClient.Name, acceptAllRemoteCertificates: false);
var server = new ApplicationDescription
{
ApplicationUri = "http://hostname/server",
};
// First we create a certificate
var(cert, _) = await storeServer.GetLocalCertificateAsync(server);
CopyAll(dirServer.Name + @"/own/certs", dirClient.Name + @"/trusted");
// The certificate is now in the expected directory
// hence it should be accepted
var ret = await storeClient.ValidateRemoteCertificateAsync(cert);
ret
.Should().BeTrue();
}
}
public async Task InvalidApplicationDescription()
{
var store = new DirectoryStore("tmp");
await store.Invoking(s => s.GetLocalCertificateAsync(null))
.Should().ThrowAsync <ArgumentNullException>();
}
public override ExitCode Execute()
{
try
{
switch (AdditionalArgs.Count)
{
case 1:
// Verify a directory inside the store
Store.Verify(new ManifestDigest(AdditionalArgs[0]), Handler);
break;
case 2:
// Verify an arbitrary directory
DirectoryStore.VerifyDirectory(AdditionalArgs[0], new ManifestDigest(AdditionalArgs[1]), Handler);
break;
}
}
catch (DigestMismatchException ex)
{
Handler.Output(Resources.VerifyImplementation, ex.Message);
return(ExitCode.DigestMismatch);
}
return(ExitCode.OK);
}
public async Task ValidateCertificateNotExisting()
{
using (var dirServer = TempDirectory.Create("Server"))
using (var dirClient = TempDirectory.Create("Client", false))
{
var storeServer = new DirectoryStore(dirServer.Name, createLocalCertificateIfNotExist: true);
var storeClient = new DirectoryStore(dirClient.Name, acceptAllRemoteCertificates: false);
var server = new ApplicationDescription
{
ApplicationUri = "http://hostname/server",
};
// First we create a certificate
var(cert, _) = await storeServer.GetLocalCertificateAsync(server);
// The certificate is not in the expected directory
// hence it should not be accepted
var ret = await storeClient.ValidateRemoteCertificateAsync(cert);
ret
.Should().BeFalse();
Directory.EnumerateFiles(dirClient.Name + @"/rejected")
.Should().HaveCount(1);
}
}
private ExitCode Verify()
{
try
{
switch (AdditionalArgs.Count)
{
case 1:
throw new OptionException(Resources.MissingArguments + Environment.NewLine + "verify [DIRECTORY] DIGEST" + Environment.NewLine + Resources.StoreVerfiyTryAuditInstead, "");
case 2:
// Verify a directory inside the store
Store.Verify(new ManifestDigest(AdditionalArgs[1]), Handler);
break;
case 3:
// Verify an arbitrary directory
DirectoryStore.VerifyDirectory(AdditionalArgs[1], new ManifestDigest(AdditionalArgs[2]), Handler);
break;
default:
throw new OptionException(Resources.TooManyArguments + Environment.NewLine + "verify [DIRECTORY] DIGEST", "");
}
}
catch (DigestMismatchException ex)
{
Handler.Output(Resources.VerifyImplementation, ex.Message);
return(ExitCode.DigestMismatch);
}
return(ExitCode.OK);
}
public async Task ValidateCertificateNull()
{
using (var dir = TempDirectory.Create())
{
var store = new DirectoryStore(dir.Name, acceptAllRemoteCertificates: false);
await store.Invoking(s => s.ValidateRemoteCertificateAsync(null))
.Should().ThrowAsync <ArgumentNullException>();
}
}
public void Constructor()
{
var store = new DirectoryStore("tmp");
store.AcceptAllRemoteCertificates
.Should().BeTrue();
store.CreateLocalCertificateIfNotExist
.Should().BeTrue();
}
public async Task InvalidApplicationUri(string uri)
{
var store = new DirectoryStore("tmp");
var app = new ApplicationDescription
{
ApplicationUri = uri,
};
await store.Invoking(s => s.GetLocalCertificateAsync(app))
.Should().ThrowAsync <ArgumentOutOfRangeException>();
}
public async Task ValidateCertificateAcceptAll()
{
using (var dir = TempDirectory.Create())
{
var store = new DirectoryStore(dir.Name, acceptAllRemoteCertificates: true);
var ret = await store.ValidateRemoteCertificateAsync(null);
ret
.Should().BeTrue();
}
}
/// <summary>
/// Deletes this temporary directory from the <see cref="IStore"/> it is located in.
/// </summary>
/// <param name="handler">A callback object used when the the user needs to be asked questions or informed about IO tasks.</param>
/// <exception cref="DirectoryNotFoundException">The directory could be found in the store.</exception>
/// <exception cref="IOException">The directory could not be deleted.</exception>
/// <exception cref="UnauthorizedAccessException">Write access to the store is not permitted.</exception>
public override void Delete(ITaskHandler handler)
{
#region Sanity checks
if (handler == null)
{
throw new ArgumentNullException(nameof(handler));
}
#endregion
handler.RunTask(new SimpleTask(string.Format(Resources.DeletingDirectory, _path), () =>
{
DirectoryStore.DisableWriteProtection(_path);
Directory.Delete(_path, recursive: true);
}));
}
public void DownloadPackage([NotNull] string fastPackageReference, [NotNull] string location)
{
Directory.CreateDirectory(location);
typeof(OneGetCommand).WriteEmbeddedFile("import.bat", Path.Combine(location, "import.bat"));
FeedCache = new DiskFeedCache(Path.Combine(location, "interfaces"), OpenPgp);
Store = new DirectoryStore(Path.Combine(location, "implementations"), useWriteProtection: false);
FeedManager.Refresh = true;
var requirements = ParseReference(fastPackageReference);
var selections = Solve(requirements);
Fetcher.Fetch(SelectionsManager.GetUncachedImplementations(selections));
SelfUpdateCheck();
}
public async Task CreateNoCertificate()
{
var store = new DirectoryStore("nocert", createLocalCertificateIfNotExist: false);
var app = new ApplicationDescription
{
ApplicationUri = "http://hostname/appname",
};
var(cert, key) = await store.GetLocalCertificateAsync(app);
cert
.Should().BeNull();
key
.Should().BeNull();
}
public void ConfigureClient()
{
clientDescription = new ApplicationDescription
{
ApplicationName = _clientOptions.ApplicationName,
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:{_clientOptions.ApplicationName}",
ApplicationType = ApplicationType.Client
};
certificateStore = new DirectoryStore("./pki");
channel = new UaTcpSessionChannel(
clientDescription,
null,
new AnonymousIdentity(),
_clientOptions.Endpoint, //server endpoint
SecurityPolicyUris.None,
_loggerFactory
);
}
public override ExitCode Execute()
{
string path = GetPath();
// Init new store to ensure the target is suitable
Store = new DirectoryStore(path);
var dirs = GetImplementationDirs().ToList();
if (dirs.AddIfNew(path))
{
SetImplementationDirs(dirs);
return ExitCode.OK;
}
else
{
Log.Warn(string.Format(Resources.AlreadyInImplDirs, path));
return ExitCode.NoChanges;
}
}
public override ExitCode Execute()
{
string path = GetPath();
// Init new store to ensure the target is suitable
Store = new DirectoryStore(path);
var dirs = GetImplementationDirs().ToList();
if (dirs.AddIfNew(path))
{
SetImplementationDirs(dirs);
return(ExitCode.OK);
}
else
{
Log.Warn(string.Format(Resources.AlreadyInImplDirs, path));
return(ExitCode.NoChanges);
}
}
public async Task CertificateDirectoryStructure()
{
using (var dir = TempDirectory.Create())
{
var store = new DirectoryStore(dir.Name, createLocalCertificateIfNotExist: true);
var app = new ApplicationDescription
{
ApplicationUri = "http://hostname/appname",
};
await store.GetLocalCertificateAsync(app);
Directory.EnumerateFiles(dir.Name + @"/own/certs")
.Should().HaveCount(1);
Directory.EnumerateFiles(dir.Name + @"/own/private")
.Should().HaveCount(1);
}
}
public async Task ConnectWithSecurity()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(), // the anonymous identity
"opc.tcp://localhost:48010"); // the endpoint of Unified Automation's UaCPPServer.
try
{
// try opening a session and reading a few nodes.
await channel.OpenAsync();
// success! client session opened with these settings.
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"UserIdentityToken: '{channel.UserIdentity}'.");
Console.WriteLine($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
public async Task LoadCertificate()
{
using (var dir = TempDirectory.Create())
{
var store = new DirectoryStore(dir.Name, createLocalCertificateIfNotExist: true);
var app = new ApplicationDescription
{
ApplicationUri = "urn:hostname:appname",
};
var(cert1, key1) = await store.GetLocalCertificateAsync(app);
var(cert2, key2) = await store.GetLocalCertificateAsync(app);
cert1
.Should().Be(cert2);
key1
.Should().Be(key2);
}
}
public async Task CreateCertificate()
{
using (var dir = TempDirectory.Create())
{
var store = new DirectoryStore(dir.Name, createLocalCertificateIfNotExist: true);
var app = new ApplicationDescription
{
ApplicationUri = "http://hostname/appname",
};
var(cert, key) = await store.GetLocalCertificateAsync(app);
cert
.Should().NotBeNull();
key
.Should().NotBeNull();
cert.SubjectDN.ToString()
.Should().Be("CN=appname,DC=hostname");
}
}
public void ShouldHandleRelativePaths()
{
// Change the working directory
string oldWorkingDir = Environment.CurrentDirectory;
Environment.CurrentDirectory = _tempDir;
try
{
_store = new DirectoryStore(".");
ShouldAllowToAddFolder();
}
finally
{
// Restore the original working directory
Environment.CurrentDirectory = oldWorkingDir;
}
}
public void SetUp()
{
_handler = new MockTaskHandler();
_tempDir = new TemporaryDirectory("0install-unit-tests");
_store = new DirectoryStore(_tempDir);
}
public async Task VectorAdd()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(), // the anonymous identity
"opc.tcp://*****:*****@" ------------------");
Console.WriteLine($" {result}");
Console.WriteLine($"\nClosing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
private static async Task TestAsync(CancellationToken token = default(CancellationToken))
{
var discoveryUrl = $"opc.tcp://localhost:26543";
var cycleTime = 5000;
// setup logger
var loggerFactory = new LoggerFactory();
loggerFactory.AddConsole(LogLevel.Information);
var logger = loggerFactory?.CreateLogger <Program>();
// Describe this app.
var appDescription = new ApplicationDescription()
{
ApplicationName = "DataLoggingConsole",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:DataLoggingConsole",
ApplicationType = ApplicationType.Client,
};
// Create a certificate store on disk.
var certificateStore = new DirectoryStore(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "DataLoggingConsole", "pki"));
// Create array of NodeIds to log.
var nodeIds = new[]
{
NodeId.Parse("i=2258")
};
while (!token.IsCancellationRequested)
{
try
{
// Discover endpoints.
var getEndpointsRequest = new GetEndpointsRequest
{
EndpointUrl = discoveryUrl,
ProfileUris = new[] { TransportProfileUris.UaTcpTransport }
};
var getEndpointsResponse = await UaTcpDiscoveryService.GetEndpointsAsync(getEndpointsRequest).ConfigureAwait(false);
if (getEndpointsResponse.Endpoints == null || getEndpointsResponse.Endpoints.Length == 0)
{
throw new InvalidOperationException($"'{discoveryUrl}' returned no endpoints.");
}
// Choose the endpoint with highest security level.
var remoteEndpoint = getEndpointsResponse.Endpoints.OrderBy(e => e.SecurityLevel).Last();
// Choose a User Identity.
IUserIdentity userIdentity = null;
if (remoteEndpoint.UserIdentityTokens.Any(p => p.TokenType == UserTokenType.Anonymous))
{
userIdentity = new AnonymousIdentity();
}
else if (remoteEndpoint.UserIdentityTokens.Any(p => p.TokenType == UserTokenType.UserName))
{
// If a username / password is requested, provide from .config file.
userIdentity = new UserNameIdentity("root", "secret");
}
else
{
throw new InvalidOperationException("Server must accept Anonymous or UserName identity.");
}
// Create a session with the server.
var session = new UaTcpSessionChannel(appDescription, certificateStore, async e => userIdentity, remoteEndpoint, loggerFactory);
try
{
await session.OpenAsync();
RegisterNodesResponse registerNodesResponse = null;
if (true) // True registers the nodeIds to improve performance of the server.
{
// Register array of nodes to read.
var registerNodesRequest = new RegisterNodesRequest
{
NodesToRegister = nodeIds
};
registerNodesResponse = await session.RegisterNodesAsync(registerNodesRequest);
}
// Prepare read request.
var readRequest = new ReadRequest
{
NodesToRead = (registerNodesResponse?.RegisteredNodeIds ?? nodeIds)
.Select(n => new ReadValueId {
NodeId = n, AttributeId = AttributeIds.Value
})
.ToArray()
};
while (!token.IsCancellationRequested)
{
// Read the nodes.
var readResponse = await session.ReadAsync(readRequest).ConfigureAwait(false);
// Write the results.
for (int i = 0; i < readRequest.NodesToRead.Length; i++)
{
logger?.LogInformation($"{nodeIds[i]}; value: {readResponse.Results[i]}");
}
try
{
await Task.Delay(cycleTime, token);
}
catch { }
}
await session.CloseAsync();
}
catch
{
await session.AbortAsync();
throw;
}
}
catch (Exception ex)
{
logger?.LogError(ex.Message);
}
try
{
await Task.Delay(cycleTime, token);
}
catch { }
}
}
private static async Task TestAsync()
{
var loggerFactory = new LoggerFactory();
loggerFactory.AddDebug(LogLevel.Trace);
var discoveryUrl = "opc.tcp://localhost:26543"; // Workstation.NodeServer
//var discoveryUrl = "opc.tcp://localhost:48010"; // UaCppServer - see http://www.unified-automation.com/
//var discoveryUrl = "opc.tcp://localhost:16664"; // open62541
Console.WriteLine("Step 1 - Describe this app.");
var appDescription = new ApplicationDescription()
{
ApplicationName = "MyHomework",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:MyHomework",
ApplicationType = ApplicationType.Client,
};
Console.WriteLine("Step 2 - Create a certificate store.");
var certificateStore = new DirectoryStore(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Workstation.ConsoleApp", "pki"));
Console.WriteLine("Step 3 - Create a session with your server.");
var channel = new UaTcpSessionChannel(
appDescription,
certificateStore,
ShowSignInDialog,
discoveryUrl,
loggerFactory: loggerFactory);
try
{
await channel.OpenAsync();
Console.WriteLine($" Opened channel with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($" SecurityPolicyUri: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($" SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($" UserIdentity: '{channel.UserIdentity}'.");
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
Console.WriteLine("Step 4 - Browse the server namespace.");
Console.WriteLine("+ Root");
BrowseRequest browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = NodeId.Parse(ObjectIds.RootFolder), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
BrowseResponse browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd1 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd1.DisplayName, rd1.BrowseName, rd1.NodeClass);
browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd1.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd2 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd2.DisplayName, rd2.BrowseName, rd2.NodeClass);
browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd2.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd3 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd3.DisplayName, rd3.BrowseName, rd3.NodeClass);
}
}
}
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
Console.WriteLine("Step 5 - Create a subscription.");
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000,
RequestedMaxKeepAliveCount = 10,
RequestedLifetimeCount = 30,
PublishingEnabled = true
};
var subscriptionResponse = await channel.CreateSubscriptionAsync(subscriptionRequest);
var id = subscriptionResponse.SubscriptionId;
Console.WriteLine("Step 6 - Add items to the subscription.");
var itemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = NodeId.Parse("i=2258"), AttributeId = AttributeIds.Value
}, MonitoringMode = MonitoringMode.Reporting, RequestedParameters = new MonitoringParameters {
ClientHandle = 12345, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
}
};
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = itemsToCreate,
};
var itemsResponse = await channel.CreateMonitoredItemsAsync(itemsRequest);
Console.WriteLine("Step 7 - Subscribe to PublishResponse stream.");
var token = channel.Where(pr => pr.SubscriptionId == id).Subscribe(pr =>
{
// loop thru all the data change notifications
var dcns = pr.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
Console.WriteLine($"sub: {pr.SubscriptionId}; handle: {min.ClientHandle}; value: {min.Value}");
}
}
});
Console.WriteLine("Press any key to delete the subscription...");
while (!Console.KeyAvailable)
{
await Task.Delay(500);
}
Console.ReadKey(true);
Console.WriteLine("Step 8 - Delete the subscription.");
var request = new DeleteSubscriptionsRequest
{
SubscriptionIds = new uint[] { id }
};
await channel.DeleteSubscriptionsAsync(request);
token.Dispose();
Console.WriteLine("Press any key to close the session...");
Console.ReadKey(true);
Console.WriteLine("Step 9 - Close the session.");
await channel.CloseAsync();
}
catch (ServiceResultException ex)
{
if ((uint)ex.HResult == StatusCodes.BadSecurityChecksFailed)
{
Console.WriteLine("Error connecting to endpoint. Did the server reject our certificate?");
}
await channel.AbortAsync();
throw;
}
}
public async Task CreateDataSubscription()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(), // the anonymous identity
"opc.tcp://localhost:48010"); // the endpoint of Unified Automation's UaCPPServer.
try
{
// try opening a session and reading a few nodes.
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"UserIdentityToken: '{channel.UserIdentity}'.");
// build a CreateSubscriptionRequest. See 'OPC UA Spec Part 4' paragraph 5.13.2
var req = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000.0, // intervals are in milliseconds
RequestedMaxKeepAliveCount = 30,
RequestedLifetimeCount = 30 * 3,
PublishingEnabled = true,
};
var res = await channel.CreateSubscriptionAsync(req);
// the result will return the server's subscription id. You will needs this to
// add monitored items.
var id = res.SubscriptionId;
Console.WriteLine($"Created subscription '{id}'.");
// build a CreateMonitoredItemsRequest. See 'OPC UA Spec Part 4' paragraph 5.12.2
var req2 = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
TimestampsToReturn = TimestampsToReturn.Both,
ItemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse(VariableIds.Server_ServerStatus_CurrentTime)
},
MonitoringMode = MonitoringMode.Reporting,
// specify a unique ClientHandle. The ClientHandle is returned in the PublishResponse
RequestedParameters = new MonitoringParameters {
ClientHandle = 42, QueueSize = 2, DiscardOldest = true, SamplingInterval = 1000.0
},
},
},
};
var res2 = await channel.CreateMonitoredItemsAsync(req2);
Console.WriteLine("\nSubscribe to PublishResponse stream.");
// when the session is open, the client sends a stream of PublishRequests to the server.
// You can subscribe to all the PublishResponses -or- subscribe to the responses from
// a single subscription.
var token = channel
// receive just the subscription we just created
.Where(pr => pr.SubscriptionId == id)
// subscribe with an 'OnNext' function, and an 'OnError' function
.Subscribe(
pr =>
{
// loop thru all the data change notifications and write them out.
var dcns = pr.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
Console.WriteLine($"sub: {pr.SubscriptionId}; handle: {min.ClientHandle}; value: {min.Value}");
}
}
},
ex => Console.WriteLine("Exception in publish response handler: {0}", ex.GetBaseException().Message)
);
// publish for 5 seconds and then close.
await Task.Delay(5000);
Console.WriteLine($"\nClosing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
public async Task CreateEventSubscription()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(), // the anonymous identity
"opc.tcp://localhost:48010"); // the endpoint of Unified Automation's UaCPPServer.
try
{
// try opening a session and reading a few nodes.
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"UserIdentityToken: '{channel.UserIdentity}'.");
// build a CreateSubscriptionRequest. See 'OPC UA Spec Part 4' paragraph 5.13.2
var req = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 500.0, // intervals are in milliseconds
RequestedMaxKeepAliveCount = 30,
RequestedLifetimeCount = 30 * 3,
PublishingEnabled = true,
};
var res = await channel.CreateSubscriptionAsync(req);
// the result will return the server's subscription id. You will needs this to
// add monitored items.
var id = res.SubscriptionId;
Console.WriteLine($"Created subscription '{id}'.");
// build a CreateMonitoredItemsRequest. See 'OPC UA Spec Part 4' paragraph 5.12.2
var req2 = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
TimestampsToReturn = TimestampsToReturn.Both,
ItemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId {
AttributeId = AttributeIds.EventNotifier, NodeId = NodeId.Parse(ObjectIds.Server)
},
MonitoringMode = MonitoringMode.Reporting,
// specify a unique ClientHandle. The ClientHandle is returned in the PublishResponse
RequestedParameters = new MonitoringParameters {
ClientHandle = 42, SamplingInterval = -1.0, QueueSize = 1000, DiscardOldest = true,
// events require an EventFilter with a SelectClause (a list of fields to receive)
Filter = new EventFilter {
SelectClauses = EventHelper.GetSelectClauses <BaseEvent>()
}
},
},
},
};
var res2 = await channel.CreateMonitoredItemsAsync(req2);
Console.WriteLine("\nSubscribe to PublishResponse stream.");
// when the session is open, the client sends a stream of PublishRequests to the server.
// You can subscribe to all the PublishResponses -or- subscribe to the responses from
// a single subscription.
var token = channel
// receive responses for the subscription we just created
.Where(pr => pr.SubscriptionId == id)
// subscribe with an 'OnNext' function, and an 'OnError' function
.Subscribe(
pr =>
{
// loop thru all the event notifications and write them out.
var enls = pr.NotificationMessage.NotificationData.OfType <EventNotificationList>();
foreach (var enl in enls)
{
foreach (var efl in enl.Events)
{
var ev = EventHelper.Deserialize <BaseEvent>(efl.EventFields);
Console.WriteLine($"time: {ev.Time}, src: {ev.SourceName}, msg: {ev.Message}, sev: {ev.Severity}");
}
}
},
ex => Console.WriteLine("Exception in publish response handler: {0}", ex.GetBaseException().Message)
);
// publish for 5 seconds and then close.
for (int i = 0; i < 10; i++)
{
// trigger an event on the Unified Automation server.
var writeResult = await channel.WriteAsync(
new WriteRequest
{
// Write true, false, true, false, ...
NodesToWrite = new[] {
new WriteValue {
NodeId = NodeId.Parse("ns=2;s=Demo.Events.Trigger_BaseEvent"),
AttributeId = AttributeIds.Value,
Value = new DataValue(i % 2 == 0)
}
}
}
);
await Task.Delay(500);
}
Console.WriteLine($"\nClosing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
/// <summary>
/// Most important method - reading the tags.
/// </summary>
public async Task <List <Tag> > OPCReadAsync(string OPCAdress)
{
//Preparing data to connect to OPC server
Tags = new List <Tag>();
var loggerFactory = new LoggerFactory();
var appDescription = new ApplicationDescription()
{
ApplicationName = "OPC",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:OPC",
ApplicationType = ApplicationType.Client,
};
var certificateStore = new DirectoryStore(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Workstation.ConsoleApp", "pki"));
var channel = new UaTcpSessionChannel(
appDescription,
certificateStore,
new AnonymousIdentity(), //by now doesn't support signing in
OPCAdress,
loggerFactory: loggerFactory);
try
{
Stopwatch stopwatch = new Stopwatch(); //measuring operations time
stopwatch.Start();
await channel.OpenAsync(); //opening channel
OnNewEvent(new LogEventArgs("Connected to OPC Server"));
//opening OPC tree branches to find actual tags - only proper for B&R X20 PLC
BrowseRequest browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = NodeId.Parse(ObjectIds.RootFolder), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
BrowseResponse browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[0].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[1].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[0].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[0].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[1].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[10].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
BrowseResponse browseResponse0 = await channel.BrowseAsync(browseRequest);
int nestingLevel = 0; //nesting level counter
Tag tag = new Tag(); //initializing first tag
int allTagsCount = browseResponse0.Results[0].References.Length - 1; //for counting progress percentage
for (int i = browseResponse0.Results[0].References.Length - 1; i >= 0; i--) //first level loop
{
var rd = browseResponse0.Results[0].References[i];
if (Tags.Count > 0 && rd.DisplayName.ToString() == Tags[0].Name)
{
break;
} //to avoid getting the same tags second time
nestingLevel = 0;
ReadValueId[] items = new ReadValueId[1];
items[0] = new ReadValueId {
NodeId = NodeId.Parse(rd.NodeId.ToString()), AttributeId = AttributeIds.DataType
};
ReadRequest readRequest = new ReadRequest {
NodesToRead = items
};
ReadResponse readResponse = await channel.ReadAsync(readRequest);
if (string.IsNullOrEmpty(tag.Name))
{
tag = new Tag(rd.DisplayName.ToString());
}
if (readResponse.Results[0].Value != null)
{
tag.ConversionFunction = Typ(readResponse.Results[0].Value.ToString());
}
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd1 in browseResponse.Results[0].References ?? new ReferenceDescription[0]) //second level loop (nesting=1)
{
if (!rd1.NodeId.ToString().Contains("#"))
{
nestingLevel = 1;
tag = await ReadTag(new ReferenceDescription[] { rd, rd1 }, channel, tag);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd1.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd2 in browseResponse.Results[0].References ?? new ReferenceDescription[0]) //third level loop (nesting=2)
{
if (!rd2.NodeId.ToString().Contains("#"))
{
nestingLevel = 2;
tag = await ReadTag(new ReferenceDescription[] { rd, rd1, rd2 }, channel, tag);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd2.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd3 in browseResponse.Results[0].References ?? new ReferenceDescription[0]) //fourth level loop (nesting=3)
{
if (!rd3.NodeId.ToString().Contains("#"))
{
nestingLevel = 3;
tag = await ReadTag(new ReferenceDescription[] { rd, rd1, rd2, rd3 }, channel, tag);
}
else if (rd3.NodeId.ToString().Contains("#EngineeringUnits"))
{
await ReadUnit(new ReferenceDescription[] { rd, rd1, rd2, rd3 }, channel, tag);
}
if (nestingLevel == 3 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
}
}
else if (rd2.NodeId.ToString().Contains("#EngineeringUnits"))
{
await ReadUnit(new ReferenceDescription[] { rd, rd1, rd2 }, channel, tag);
}
if (nestingLevel == 2 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
}
}
else if (rd1.NodeId.ToString().Contains("#EngineeringUnits"))
{
await ReadUnit(new ReferenceDescription[] { rd, rd1 }, channel, tag);
}
if (nestingLevel == 1 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
}
if (nestingLevel == 0 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
OnProgressChanged(new ProgressChangedArgs((allTagsCount - i) * 100 / allTagsCount)); //computing progress percentage
}
await channel.CloseAsync(); //closing the channel
stopwatch.Stop();
OnNewEvent(new LogEventArgs(Tags.Count + " tags read, time elapsed: " + stopwatch.Elapsed.TotalSeconds.ToString("F3") + " s"));
}
catch (Exception ex)
{
OnNewEvent(new LogEventArgs("Error connecting to OPC server."));
await channel.AbortAsync();
}
return(Tags);
}
public async Task WriteIndexRange()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(), // the anonymous identity
"opc.tcp://localhost:48010"); // the endpoint of Unified Automation's UaCPPServer.
try
{
// try opening a session and reading a few nodes.
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"UserIdentityToken: '{channel.UserIdentity}'.");
// build a WriteRequest. See 'OPC UA Spec Part 4' paragraph 5.10.4
var writeRequest = new WriteRequest
{
// set the NodesToWrite to an array of WriteValues.
NodesToWrite = new[] {
// construct a WriteValue from a NodeId, AttributeId and DataValue.
new WriteValue {
// use a saved NodeId or Parse the nodeId from a string.
// e.g. "ns=2;s=Demo.Static.Scalar.Double"
NodeId = NodeId.Parse("ns=2;s=Demo.CTT.AllProfiles.Arrays.Double"),
// variable class nodes have a Value attribute.
AttributeId = AttributeIds.Value,
// ask to write an slice of the underlying array
IndexRange = "1:2",
// the DataValue type has to match the underlying array type exactly.
Value = new DataValue(new double[] { 41.0, 42.0 }),
}
}
};
// send the WriteRequest to the server.
var writeResult = await channel.WriteAsync(writeRequest);
// 'Results' will be a array of status codes, one for every WriteValue.
var result = writeResult.Results[0];
Console.WriteLine($"Write result: {result}");
Console.WriteLine($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
public void DownloadPackage([NotNull] string fastPackageReference, [NotNull] string location)
{
Directory.CreateDirectory(location);
this.GetEmbedded("import.bat").CopyToFile(Path.Combine(location, "import.bat"));
FeedCache = new DiskFeedCache(Path.Combine(location, "interfaces"), OpenPgp);
Store = new DirectoryStore(Path.Combine(location, "implementations"), useWriteProtection: false);
FeedManager.Refresh = true;
var requirements = ParseReference(fastPackageReference);
var selections = Solve(requirements);
Fetcher.Fetch(SelectionsManager.GetUncachedImplementations(selections));
SelfUpdateCheck();
}
public async Task ReadHistoryRawValues()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(), // the anonymous identity
"opc.tcp://localhost:48010"); // the endpoint of Unified Automation's UaCPPServer.
try
{
// try opening a session and reading a few nodes.
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"UserIdentityToken: '{channel.UserIdentity}'.");
Console.WriteLine("\nCheck if DataLogger active.");
// check if DataLoggerActive is true. If not, then call method StartLogging.
var req = new ReadRequest
{
NodesToRead = new[] {
new ReadValueId {
NodeId = NodeId.Parse("ns=2;s=Demo.History.DataLoggerActive"), AttributeId = AttributeIds.Value
}
},
};
var res = await channel.ReadAsync(req);
if (StatusCode.IsBad(res.Results[0].StatusCode))
{
throw new InvalidOperationException("Error reading 'Demo.History.DataLoggerActive'. ");
}
var isActive = res.Results[0].GetValueOrDefault <bool>();
if (!isActive)
{
Console.WriteLine("Activating DataLogger.");
var req1 = new CallRequest
{
MethodsToCall = new[] {
new CallMethodRequest {
ObjectId = NodeId.Parse("ns=2;s=Demo.History"), // parent node
MethodId = NodeId.Parse("ns=2;s=Demo.History.StartLogging")
},
},
};
var res1 = await channel.CallAsync(req1);
if (StatusCode.IsBad(res1.Results[0].StatusCode))
{
throw new InvalidOperationException("Error calling method 'Demo.History.StartLogging'.");
}
Console.WriteLine("Note: Datalogger has just been activated, so there will be little or no history data to read.");
Console.WriteLine(" Try again in 1 minute.");
}
Console.WriteLine("\nReading history for last 1 minute(s).");
// A continuation point is returned if there are more values to return than the
// limit set by parameter NumValuesPerNode. A client should continue calling HistoryRead
// until the continuation point returns null.
byte[] cp = null;
do
{
var req2 = new HistoryReadRequest
{
HistoryReadDetails = new ReadRawModifiedDetails
{
StartTime = DateTime.UtcNow.Add(TimeSpan.FromSeconds(-60)), // set start time to 1 minute ago
EndTime = DateTime.UtcNow,
NumValuesPerNode = 100, // sets limit. if there are more values to return then a continuation point is returned.
ReturnBounds = false, // set true to return interpolated values for the start and end times
},
TimestampsToReturn = TimestampsToReturn.Both,
ReleaseContinuationPoints = false, // set true to abandon returning any remaining values from this interval
NodesToRead = new[] {
new HistoryReadValueId {
NodeId = NodeId.Parse("ns=2;s=Demo.History.DoubleWithHistory"), ContinuationPoint = cp
},
},
};
var res2 = await channel.HistoryReadAsync(req2);
if (StatusCode.IsGood(res2.Results[0].StatusCode))
{
var historyData = res2.Results[0].HistoryData as HistoryData;
Console.WriteLine($"Found {historyData.DataValues.Length} value(s) for node '{req2.NodesToRead[0].NodeId}':");
foreach (var dv in historyData.DataValues)
{
Console.WriteLine($"Read {dv.Value}, q: {dv.StatusCode}, ts: {dv.SourceTimestamp}");
}
cp = res2.Results[0].ContinuationPoint;
// if ContinuationPoint is null, then there is no more data to return.
if (cp == null)
{
break;
}
}
else
{
Console.WriteLine($"HistoryRead return statuscode: {res2.Results[0].StatusCode}");
break;
}
} while (cp != null); // loop while ContinuationPoint is not null.
Console.WriteLine($"\nClosing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
public async Task BrowseObjectFolder()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(),
"opc.tcp://localhost:48010"); // the endpoint of Unified Automation's UaCPPServer.
try
{
// try opening a session and reading a few nodes.
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"UserIdentityToken: '{channel.UserIdentity}'.");
// build a BrowseRequest. See 'OPC UA Spec Part 4' section 5.8.2
var browseRequest = new BrowseRequest
{
NodesToBrowse = new[] {
new BrowseDescription {
// gather references of this nodeid.
NodeId = NodeId.Parse(ObjectIds.ObjectsFolder),
// include just 'Forward' references
BrowseDirection = BrowseDirection.Forward,
// include 'HierarchicalReferences'
ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences),
// include 'HierarchicalReferences' and all subtypes of 'HierarchicalReferences'
IncludeSubtypes = true,
// include all classes of node
NodeClassMask = (uint)NodeClass.Unspecified,
// return reference descriptions with all the fields filled out
ResultMask = (uint)BrowseResultMask.All,
}
},
RequestedMaxReferencesPerNode = 1000
};
// send the request to the server
var browseResponse = await channel.BrowseAsync(browseRequest).ConfigureAwait(false);
Console.WriteLine("\n+ Objects, 0:Objects, Object, i=85");
Assert.IsNotNull(browseResponse.Results[0].References);
foreach (var rd in browseResponse.Results[0].References)
{
Console.WriteLine(" + {0}, {1}, {2}, {3}", rd.DisplayName, rd.BrowseName, rd.NodeClass, rd.NodeId);
}
// it is good practice to be prepared to receive a continuationPoint.
// ContinuationPoints are returned when the server has more information
// than can be delivered in current response.
// To test this code, you can reduce the above RequestedMaxReferencesPerNode
// to 1.
var cp = browseResponse.Results[0].ContinuationPoint;
while (cp != null)
{
var browseNextRequest = new BrowseNextRequest {
ContinuationPoints = new[] { cp }, ReleaseContinuationPoints = false
};
var browseNextResponse = await channel.BrowseNextAsync(browseNextRequest);
Assert.IsNotNull(browseNextResponse.Results[0].References);
foreach (var rd in browseNextResponse.Results[0].References)
{
Console.WriteLine(" + {0}, {1}, {2}", rd.DisplayName, rd.BrowseName, rd.NodeClass);
}
cp = browseNextResponse.Results[0].ContinuationPoint;
}
Console.WriteLine($"\nClosing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
public async Task ReadIndexRange()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(), // the anonymous identity
"opc.tcp://localhost:48010"); // the endpoint of Unified Automation's UaCPPServer.
try
{
// try opening a session and reading a few nodes.
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"UserIdentityToken: '{channel.UserIdentity}'.");
// build a ReadRequest. See 'OPC UA Spec Part 4' paragraph 5.10.2
var readRequest = new ReadRequest
{
// set the NodesToRead to an array of ReadValueIds.
NodesToRead = new[] {
// construct a ReadValueId from a NodeId and AttributeId.
new ReadValueId {
// use a saved NodeId or Parse the nodeId from a string.
// e.g. "ns=2;s=Demo.Static.Scalar.Double"
NodeId = NodeId.Parse("ns=2;s=Demo.CTT.AllProfiles.Arrays.Double"),
// variable class nodes have a Value attribute.
AttributeId = AttributeIds.Value,
// ask to read a range of the underlying array
IndexRange = "1:2"
}
}
};
// send the ReadRequest to the server.
var readResult = await channel.ReadAsync(readRequest);
// 'Results' will be an array of DataValues, one for every ReadValueId.
// A DataValue holds the sampled value, timestamps and quality status code.
var result = readResult.Results[0].GetValueOrDefault <double[]>();
Console.WriteLine($"Read result: {string.Join(' ', result)}");
Console.WriteLine($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
private static async Task ConnectAndPublish(CancellationToken token = default)
{
var discoveryUrl = "opc.tcp://localhost:48010"; // UaCppServer - see http://www.unified-automation.com/
var appDescription = new ApplicationDescription()
{
ApplicationName = "MyHomework",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:MyHomework",
ApplicationType = ApplicationType.Client,
};
var certificateStore = new DirectoryStore(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Workstation.ConsoleApp", "pki"));
while (!token.IsCancellationRequested)
{
var channel = new UaTcpSessionChannel(
appDescription,
certificateStore,
new AnonymousIdentity(),
discoveryUrl);
try
{
await channel.OpenAsync();
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000,
RequestedMaxKeepAliveCount = 10,
RequestedLifetimeCount = 30,
PublishingEnabled = true
};
var subscriptionResponse = await channel.CreateSubscriptionAsync(subscriptionRequest);
var id = subscriptionResponse.SubscriptionId;
var itemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = NodeId.Parse("i=2258"), AttributeId = AttributeIds.Value
}, MonitoringMode = MonitoringMode.Reporting, RequestedParameters = new MonitoringParameters {
ClientHandle = 12345, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
}
};
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = itemsToCreate,
};
var itemsResponse = await channel.CreateMonitoredItemsAsync(itemsRequest);
var subtoken = channel.Where(pr => pr.SubscriptionId == id).Subscribe(
pr =>
{
var dcns = pr.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
Console.WriteLine($"sub: {pr.SubscriptionId}; handle: {min.ClientHandle}; value: {min.Value}");
}
}
},
// need to handle error when server closes
ex => { });
try
{
Task.WaitAny(new Task[] { channel.Completion }, token);
}
catch (OperationCanceledException) { }
var request = new DeleteSubscriptionsRequest
{
SubscriptionIds = new uint[] { id }
};
await channel.DeleteSubscriptionsAsync(request);
subtoken.Dispose();
await channel.CloseAsync();
}
catch (Exception ex)
{
Console.WriteLine($"Error connecting and publishing. {ex.Message}");
await channel.AbortAsync();
try
{
await Task.Delay(5000, token);
}
catch (TaskCanceledException) { }
}
}
}