// Shows how to create and delete OPC UA directories, using the file transfer client.
// Note: Consider using a higher-level abstraction, OPC UA file provider, instead.
using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.Extensions;
using OpcLabs.EasyOpc.UA.FileTransfer;
using OpcLabs.EasyOpc.UA.OperationModel;
namespace UADocExamples.FileTransfer._EasyUAFileTransferClient
{
class CreateDirectoryAndDelete
{
public static void Main1()
{
// Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe)
var endpointDescriptor = new UAEndpointDescriptor("opc.tcp://localhost:48030")
.WithUserNameIdentity("john", "master");
// An object that aggregates an OPC UA file system.
UANodeDescriptor objectDescriptor = "nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files";
// Create a random number generator - will be used for file/directory names.
var random = new Random();
// Instantiate the file transfer client object
var fileTransferClient = new EasyUAFileTransferClient();
// Create two directories, and one nested directory, and delete the first one.
try
{
// The file system node is a root directory of the file system.
Console.WriteLine("Getting file system...");
UANodeDescriptor fileSystemNodeDescriptor = fileTransferClient.GetFileSystem(endpointDescriptor, objectDescriptor);
string directoryName1 = "MyDirectory1-" + random.Next();
Console.WriteLine($"Creating first directory, '{directoryName1}'...");
UANodeId directoryNodeId1 = fileTransferClient.CreateDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName1);
Console.WriteLine($"Node Id of the first directory: {directoryNodeId1}");
string directoryName2 = "MyDirectory2-" + random.Next();
Console.WriteLine($"Creating second directory, '{directoryName2}'...");
UANodeId directoryNodeId2 = fileTransferClient.CreateDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName2);
Console.WriteLine($"Node Id of the second directory: {directoryNodeId2}");
string nestedDirectoryName = "MyDirectory3-" + random.Next();
Console.WriteLine($"Creating nested directory, '{nestedDirectoryName}'...");
// Note how directoryNodeId2 (a parent directory) is passed as the 2nd argument to the CreateDirectory method.
UANodeId nestedDirectoryNodeId = fileTransferClient.CreateDirectory(endpointDescriptor, directoryNodeId2, nestedDirectoryName);
Console.WriteLine($"Node Id of the nested directory: {nestedDirectoryNodeId}");
// At this moment, the directory structure we have created looks like this:
// * MyDirectory1
// * MyDirectory2
// * * MyDirectory3
Console.WriteLine("Deleting the first directory...");
fileTransferClient.DeleteDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName1);
}
catch (UAException uaException)
{
Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
return;
}
Console.WriteLine("Finished...");
}
}
}
# Shows how to create and delete OPC UA directories, using the file transfer client.
# Note: Consider using a higher-level abstraction, OPC UA file provider, instead.
# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc
import random
# Import .NET namespaces.
from OpcLabs.EasyOpc.UA import *
from OpcLabs.EasyOpc.UA.Extensions import *
from OpcLabs.EasyOpc.UA.FileTransfer import *
from OpcLabs.EasyOpc.UA.OperationModel import *
# Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe).
endpointDescriptor = UAEndpointDescriptor('opc.tcp://localhost:48030')
endpointDescriptor = UAEndpointDescriptorExtension.WithUserNameIdentity(endpointDescriptor,'john', 'master')
# An object that aggregates an OPC UA file system.
objectDescriptor = UANodeDescriptor('nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files')
# Create a random number generator - will be used for file/directory names.
random = random.Random()
# Instantiate the file transfer client object.
fileTransferClient = EasyUAFileTransferClient()
# Prevent prompt to trust the server certificate (INSECURE, used just for smooth example flow).
EasyUAClient.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustEndpointUrlString(
endpointDescriptor.UrlString)
# Create two directories, and one nested directory, and delete the first one.
try:
# The file system node is a root directory of the file system.
print('Getting file system...')
fileSystemNodeDescriptor = IEasyUAFileTransferExtension.GetFileSystem(fileTransferClient,
endpointDescriptor, objectDescriptor)
directoryName1 = 'MyDirectory1-' + str(random.randint(0, 999_999_999))
print("Creating first directory, '", directoryName1, "'...", sep='')
directoryNodeId1 = fileTransferClient.CreateDirectory(endpointDescriptor,
fileSystemNodeDescriptor,
directoryName1)
print('Node Id of the first directory: ', directoryNodeId1, sep='')
directoryName2 = 'MyDirectory2-' + str(random.randint(0, 999_999_999))
print("Creating second directory, '", directoryName2, "'...", sep='')
directoryNodeId2 = fileTransferClient.CreateDirectory(endpointDescriptor,
fileSystemNodeDescriptor,
directoryName2)
print('Node Id of the second directory: ', directoryNodeId1, sep='')
nestedDirectoryName = 'MyDirectory3-' + str(random.randint(0, 999_999_999))
print("Creating nested directory, '", nestedDirectoryName, "'...", sep='')
# Note how directoryNodeId2 (a parent directory) is passed as the 2nd argument to the CreateDirectory method.
nestedDirectoryNodeId = fileTransferClient.CreateDirectory(endpointDescriptor,
UANodeDescriptor(directoryNodeId2),
nestedDirectoryName)
print('Node Id of the nested directory: ', nestedDirectoryNodeId, sep='')
# At this moment, the directory structure we have created looks like this:
# * MyDirectory1
# * MyDirectory2
# * * MyDirectory3
print('Deleting the first directory...')
IEasyUAFileTransferExtension.DeleteDirectory(fileTransferClient,
endpointDescriptor, fileSystemNodeDescriptor, directoryName1)
except UAException as uaException:
print('*** Failure: ' + uaException.GetBaseException().Message)
exit()
print()
print('Finished.')
' Shows how to create and delete OPC UA directories, using the file transfer client.
' Note: Consider using a higher-level abstraction, OPC UA file provider, instead.
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.AddressSpace
Imports OpcLabs.EasyOpc.UA.Extensions
Imports OpcLabs.EasyOpc.UA.FileTransfer
Imports OpcLabs.EasyOpc.UA.OperationModel
Namespace FileTransfer._EasyUAFileTransferClient
Friend Class CreateDirectoryAndDelete
Public Shared Sub Main1()
' Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe)
Dim endpointDescriptor As UAEndpointDescriptor =
New UAEndpointDescriptor("opc.tcp://localhost:48030") _
.WithUserNameIdentity("john", "master")
' An object that aggregates an OPC UA file system.
Dim objectDescriptor As UANodeDescriptor = "nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files"
' Create a random number generator - will be used for file/directory names.
Dim random = New Random
' Instantiate the file transfer client object
Dim fileTransferClient = New EasyUAFileTransferClient
' Create two directories, and one nested directory, and delete the first one.
Try
' The file system node is a root directory of the file system.
Console.WriteLine("Getting file system...")
Dim fileSystemNodeDescriptor As UANodeDescriptor = fileTransferClient.GetFileSystem(endpointDescriptor, objectDescriptor)
Dim directoryName1 As String = "MyDirectory1-" & random.Next()
Console.WriteLine($"Creating first directory, '{directoryName1}'...")
Dim directoryNodeId1 As UANodeId = fileTransferClient.CreateDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName1)
Console.WriteLine($"Node Id of the first directory: {directoryNodeId1}")
Dim directoryName2 As String = "MyDirectory2-" & random.Next()
Console.WriteLine($"Creating second directory, '{directoryName2}'...")
Dim directoryNodeId2 As UANodeId = fileTransferClient.CreateDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName2)
Console.WriteLine($"Node Id of the second directory: {directoryNodeId2}")
Dim nestedDirectoryName As String = "MyDirectory3-" & random.Next()
Console.WriteLine($"Creating nested directory, '{nestedDirectoryName}'...")
' Note how directoryNodeId2 (a parent directory) Is passed as the 2nd argument to the CreateDirectory method.
Dim nestedDirectoryNodeId As UANodeId = fileTransferClient.CreateDirectory(endpointDescriptor, directoryNodeId2, nestedDirectoryName)
Console.WriteLine($"Node Id of the nested directory: {nestedDirectoryNodeId}")
' At this moment, the directory structure we have created looks Like this
' * MyDirectory1
' * MyDirectory2
' * * MyDirectory3
Console.WriteLine("Deleting the first directory...")
fileTransferClient.DeleteDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName1)
Catch uaException As UAException
Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
Exit Sub
End Try
Console.WriteLine("Finished...")
End Sub
End Class
End Namespace
