Samples Reappend

2023-02-13 19:58:15 +08:00
parent 4e70553bfc
commit eb4a7cffd6
471 changed files with 151790 additions and 6 deletions
--- a/Libraries/h-opc/ClientUtils.cs
+++ b/Libraries/h-opc/ClientUtils.cs
@@ -0,0 +1,100 @@
+using System.Linq;
+using Opc.Ua;
+using System;
+using Opc.Ua.Client;
+
+namespace Hylasoft.Opc.Ua
+{
+  /// <summary>
+  /// List of static utility methods
+  /// </summary>
+  internal static class ClientUtils
+  {
+    // TODO I didn't write these methods. I should rewrite it once I understand whtat it does, beacuse it looks crazy
+
+    public static EndpointDescription SelectEndpoint(Uri discoveryUrl, bool useSecurity)
+    {
+      var configuration = EndpointConfiguration.Create();
+      configuration.OperationTimeout = 5000;
+      EndpointDescription endpointDescription1 = null;
+      using (var discoveryClient = DiscoveryClient.Create(discoveryUrl, configuration))
+      {
+        var endpoints = discoveryClient.GetEndpoints(null);
+        foreach (var endpointDescription2 in endpoints.Where(endpointDescription2 => endpointDescription2.EndpointUrl.StartsWith(discoveryUrl.Scheme)))
+        {
+          if (useSecurity)
+          {
+            if (endpointDescription2.SecurityMode == MessageSecurityMode.None)
+              continue;
+          }
+          else if (endpointDescription2.SecurityMode != MessageSecurityMode.None)
+            continue;
+          if (endpointDescription1 == null)
+            endpointDescription1 = endpointDescription2;
+          if (endpointDescription2.SecurityLevel > endpointDescription1.SecurityLevel)
+            endpointDescription1 = endpointDescription2;
+        }
+        if (endpointDescription1 == null)
+        {
+          if (endpoints.Count > 0)
+            endpointDescription1 = endpoints[0];
+        }
+      }
+      var uri = Utils.ParseUri(endpointDescription1.EndpointUrl);
+      if (uri != null && uri.Scheme == discoveryUrl.Scheme)
+        endpointDescription1.EndpointUrl = new UriBuilder(uri)
+        {
+          Host = discoveryUrl.DnsSafeHost,
+          Port = discoveryUrl.Port
+        }.ToString();
+      return endpointDescription1;
+    }
+
+    public static ReferenceDescriptionCollection Browse(Session session, NodeId nodeId)
+    {
+      var desc = new BrowseDescription
+      {
+        NodeId = nodeId,
+        BrowseDirection = BrowseDirection.Forward,
+        IncludeSubtypes = true,
+        NodeClassMask = 0U,
+        ResultMask = 63U,
+      };
+      return Browse(session, desc, true);
+    }
+
+    public static ReferenceDescriptionCollection Browse(Session session, BrowseDescription nodeToBrowse, bool throwOnError)
+    {
+      try
+      {
+        var descriptionCollection = new ReferenceDescriptionCollection();
+        var nodesToBrowse = new BrowseDescriptionCollection { nodeToBrowse };
+        BrowseResultCollection results;
+        DiagnosticInfoCollection diagnosticInfos;
+        session.Browse(null, null, 0U, nodesToBrowse, out results, out diagnosticInfos);
+        ClientBase.ValidateResponse(results, nodesToBrowse);
+        ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
+        while (!StatusCode.IsBad(results[0].StatusCode))
+        {
+          for (var index = 0; index < results[0].References.Count; ++index)
+            descriptionCollection.Add(results[0].References[index]);
+          if (results[0].References.Count == 0 || results[0].ContinuationPoint == null)
+            return descriptionCollection;
+          var continuationPoints = new ByteStringCollection();
+          continuationPoints.Add(results[0].ContinuationPoint);
+          session.BrowseNext(null, false, continuationPoints, out results, out diagnosticInfos);
+          ClientBase.ValidateResponse(results, continuationPoints);
+          ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
+        }
+        throw new ServiceResultException(results[0].StatusCode);
+      }
+      catch (Exception ex)
+      {
+        if (throwOnError)
+          throw new ServiceResultException(ex, 2147549184U);
+        return null;
+      }
+    }
+  }
+}
+