private async Task BrowseEntireTree(BrowseNode parent, List <BrowseNode> result, HashSet <BrowseNode> set)
{
var children = await BrowseTree(parent.ID);
if (children == null || connection == null)
{
return;
}
foreach (ReferenceDescription item in children)
{
if (item.NodeId == null)
{
continue;
}
NodeId id = ExpandedNodeId.ToNodeId(item.NodeId, connection.NamespaceUris);
if (item.NodeClass == NodeClass.Object && id.NamespaceIndex != 0 && item.BrowseName != null)
{
var nodeObject = new BrowseNode(id, item.BrowseName, parent);
await BrowseEntireTree(nodeObject, result, set);
}
else if (item.NodeClass == NodeClass.Variable && id.NamespaceIndex != 0 && item.BrowseName != null)
{
var nodeVariable = new BrowseNode(id, item.BrowseName, parent);
if (!set.Contains(nodeVariable))
{
result.Add(nodeVariable);
set.Add(nodeVariable);
}
}
}
}
public override async Task <BrowseDataItemsResult> BrowseDataItems()
{
string clientCertificate = GetCertificate(certificateLocation);
if (connection == null)
{
string endpoint = config?.Address ?? "";
string msg = $"No connection to OPC UA server '{endpoint}': " + lastConnectErrMsg;
return(new BrowseDataItemsResult(
supportsBrowsing: true,
browsingError: msg,
items: new DataItemBrowseInfo[0],
clientCertificate: clientCertificate));
}
NodeId objectsID = ExpandedNodeId.ToNodeId(ExpandedNodeId.Parse(ObjectIds.ObjectsFolder), connection.NamespaceUris);
BrowseNode objects = new BrowseNode(objectsID, new QualifiedName("Objects"));
var result = new List <BrowseNode>();
var set = new HashSet <BrowseNode>();
await BrowseEntireTree(objects, result, set);
var items = result.Select(MakeDataItemBrowseInfo).ToArray();
return(new BrowseDataItemsResult(
supportsBrowsing: true,
browsingError: "",
items: items,
clientCertificate: clientCertificate));
}
private static DataItemBrowseInfo MakeDataItemBrowseInfo(BrowseNode n)
{
var list = new List <BrowseNode>();
BrowseNode.BuildPath(n, list, includeRoot: false);
string[] path = list.Select(node => node.BrowseName.Name ?? node.BrowseName.ToString()).ToArray();
return(new DataItemBrowseInfo(n.ID.ToString(), path));
}
public override async Task <string[]> BrowseDataItemAddress(string?idOrNull)
{
if (connection == null)
{
return(new string[0]);
}
if (cachedBrowseResult != null && cacheTime.HasValue && Timestamp.Now - cacheTime.Value < Duration.FromMinutes(CacheTimeMinutes))
{
PrintLine("Returning cached browse result.");
return(cachedBrowseResult);
}
cachedBrowseResult = null;
cacheTime = null;
var result = new List <BrowseNode>();
NodeId objectsID = ExpandedNodeId.ToNodeId(ExpandedNodeId.Parse(ObjectIds.ObjectsFolder), connection.NamespaceUris);
var objects = new BrowseNode(objectsID, new QualifiedName("Objects"));
//NodeId viewsID = ExpandedNodeId.ToNodeId(ExpandedNodeId.Parse(ObjectIds.ViewsFolder), connection.NamespaceUris);
//var views = new BrowseNode(viewsID, new QualifiedName("Views"));
var set = new HashSet <BrowseNode>();
var sw = System.Diagnostics.Stopwatch.StartNew();
await BrowseEntireTree(objects, result, set);
sw.Stop();
//await BrowseEntireTree(views, result);
string[] ids = new string[result.Count];
for (int i = 0; i < result.Count; ++i)
{
ids[i] = result[i].ToString();
}
if (ids.Length > 0)
{
Task _ = File.WriteAllLinesAsync("Browse_OPC_UA.txt", ids);
}
if (sw.Elapsed > TimeSpan.FromSeconds(5))
{
PrintLine($"Caching browse result for {CacheTimeMinutes} minutes.");
cachedBrowseResult = ids;
cacheTime = Timestamp.Now;
}
return(ids);
}
private static void PrintPath(BrowseNode node, StringBuilder sb)
{
if (node.Parent == null)
{
sb.Append(node.BrowseName.Name);
}
else
{
PrintPath(node.Parent, sb);
sb.Append('/');
sb.Append(node.BrowseName.ToString());
}
}
public override async Task <string[]> BrowseDataItemAddress(string idOrNull)
{
if (connection == null)
{
return(new string[0]);
}
var result = new List <BrowseNode>();
NodeId objectsID = ExpandedNodeId.ToNodeId(ExpandedNodeId.Parse(ObjectIds.ObjectsFolder), connection.NamespaceUris);
var objects = new BrowseNode(objectsID, new QualifiedName("Objects"));
NodeId viewsID = ExpandedNodeId.ToNodeId(ExpandedNodeId.Parse(ObjectIds.ViewsFolder), connection.NamespaceUris);
var views = new BrowseNode(viewsID, new QualifiedName("Views"));
await BrowseEntireTree(objects, result);
await BrowseEntireTree(views, result);
return(result.Select(n => n.ToString()).ToArray());
}
private async Task BrowseEntireTree(BrowseNode parent, List <BrowseNode> result)
{
var children = await BrowseTree(parent.ID);
foreach (ReferenceDescription item in children)
{
NodeId id = ExpandedNodeId.ToNodeId(item.NodeId, connection.NamespaceUris);
if (item.NodeClass == NodeClass.Object && id.NamespaceIndex != 0)
{
var nodeObject = new BrowseNode(id, item.BrowseName, parent);
await BrowseEntireTree(nodeObject, result);
}
else if (item.NodeClass == NodeClass.Variable && id.NamespaceIndex != 0)
{
var nodeVariable = new BrowseNode(id, item.BrowseName, parent);
if (result.All(n => n.ID != id))
{
result.Add(nodeVariable);
}
}
}
}
public BrowseNode(NodeId id, QualifiedName browseName, BrowseNode parent = null)
{
ID = id;
BrowseName = browseName;
Parent = parent;
}