// Shows how to copy an OPC UA file, using the file provider model.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
using System;
using OpcLabs.BaseLib.Extensions.FileProviders;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.Extensions;
using OpcLabs.EasyOpc.UA.FileTransfer;
namespace UADocExamples.FileProviders._WritableFileInfo
{
class CopyTo
{
public static void Main1()
{
// Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe)
var endpointDescriptor = new UAEndpointDescriptor("opc.tcp://localhost:48030")
.WithUserNameIdentity("john", "master");
// A node that represents an OPC UA file system (a root directory).
UANodeDescriptor fileSystemNodeDescriptor = "nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files.FileSystem";
// 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();
Console.WriteLine("Getting writable file provider...");
IWritableFileProvider writableFileProvider =
fileTransferClient.GetWritableFileProvider(endpointDescriptor, fileSystemNodeDescriptor);
// From this point onwards, the code is independent of the concrete realization of the file provider, and would
// be identical e.g. for files in the physical file system, if the corresponding file provider was used.
// Create a file, and a directory. Then, copy the file into the directory.
try
{
string fileName = "MyFile-" + random.Next();
Console.WriteLine($"Creating file, '{fileName}'...");
IWritableFileInfo writableFileInfo = writableFileProvider.GetWritableFileInfo(fileName);
writableFileInfo.WriteAllBytes(Array.Empty<byte>());
string directoryName = "MyDirectory-" + random.Next();
Console.WriteLine($"Creating directory, '{directoryName}'...");
IWritableDirectoryContents writableDirectoryContents = writableFileProvider.GetWritableDirectoryContents(directoryName);
writableDirectoryContents.Create();
Console.WriteLine("Copying the file...");
writableFileInfo.CopyTo(FormattableString.Invariant($"{directoryName}/{fileName}"));
}
// Methods in the file provider model throw IOException and other exceptions, but not UAException.
catch (Exception exception)
{
Console.WriteLine($"*** Failure: {exception.GetBaseException().Message}");
return;
}
Console.WriteLine("Finished...");
}
}
}
# Shows how to copy an OPC UA file, using the file provider model.
#
# Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
# OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-Python .
# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc
import random
# Import .NET namespaces.
from System import *
from OpcLabs.BaseLib.Extensions.FileProviders import *
from OpcLabs.EasyOpc.UA import *
from OpcLabs.EasyOpc.UA.Extensions import *
from OpcLabs.EasyOpc.UA.FileTransfer import *
# Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe).
endpointDescriptor = UAEndpointDescriptor('opc.tcp://localhost:48030')
endpointDescriptor = UAEndpointDescriptorExtension.WithUserNameIdentity(endpointDescriptor,'john', 'master')
# A node that represents an OPC UA file system (a root directory).
fileSystemNodeDescriptor = UANodeDescriptor('nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files.FileSystem')
# 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)
print('Getting writable file provider...')
writableFileProvider = IEasyUAFileTransferExtension.GetWritableFileProvider(fileTransferClient,
endpointDescriptor,
fileSystemNodeDescriptor)
# From this point onwards, the code is independent of the concrete realization of the file provider, and would
# be identical e.g. for files in the physical file system, if the corresponding file provider was used.
# Create a file, and a directory. Then, copy the file into the directory.
try:
fileName = 'MyFile-' + str(random.randint(0, 999_999_999))
print("Creating file, '", fileName, "'...", sep='')
writableFileInfo = writableFileProvider.GetWritableFileInfo(fileName)
IWritableFileInfoExtension.WriteAllBytes(writableFileInfo, Array.Empty[Byte]())
directoryName = 'MyDirectory-' + str(random.randint(0, 999_999_999))
print("Creating directory, '", directoryName, "'...", sep='')
writableDirectoryContents = writableFileProvider.GetWritableDirectoryContents(directoryName)
writableDirectoryContents.Create()
print('Copying the file...')
IWritableFileInfoExtension.CopyTo(writableFileInfo, directoryName + '/' + fileName)
# Methods in the file provider model throw IOException and other exceptions, but not UAException.
except Exception as exception:
print('*** Failure: ' + exception.GetBaseException().Message)
exit()
print()
print('Finished.')
' Shows how to copy an OPC UA file, using the file provider model.
'
' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
Imports OpcLabs.BaseLib.Extensions.FileProviders
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.Extensions
Imports OpcLabs.EasyOpc.UA.FileTransfer
Namespace FileProviders._WritableFileInfo
Friend Class CopyTo
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")
' A node that represents an OPC UA file system (a root directory).
Dim fileSystemNodeDescriptor As UANodeDescriptor =
"nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files.FileSystem"
' 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
Console.WriteLine("Getting writable file provider...")
Dim writableFileProvider As IWritableFileProvider =
fileTransferClient.GetWritableFileProvider(endpointDescriptor, fileSystemNodeDescriptor)
' From this point onwards, the code is independent of the concrete realization of the file provider, and would
' be identical e.g. for files in the physical file system, if the corresponding file provider was used.
' Create a file, and a directory. Then, copy the file into the directory.
Try
Dim fileName As String = "MyFile-" & random.Next()
Console.WriteLine($"Creating file, '{fileName}'...")
Dim writableFileInfo As IWritableFileInfo = writableFileProvider.GetWritableFileInfo(fileName)
writableFileInfo.WriteAllBytes(Array.Empty(Of Byte))
Dim directoryName As String = "MyDirectory-" & random.Next()
Console.WriteLine($"Creating directory, '{directoryName}'...")
Dim writableDirectoryContents As IWritableDirectoryContents = writableFileProvider.GetWritableDirectoryContents(directoryName)
writableDirectoryContents.Create()
Console.WriteLine("Copying the file...")
writableFileInfo.CopyTo(FormattableString.Invariant($"{directoryName}/{fileName}"))
' Methods in the file provider model throw IOException and other exceptions, but not UAException.
Catch exception As Exception
Console.WriteLine("*** Failure: {0}", exception.GetBaseException.Message)
Exit Sub
End Try
Console.WriteLine("Finished...")
End Sub
End Class
End Namespace
