AttributesWithContext(ua.AttributeIDAccessLevel) always returns None, should be CurrentRead/CurrentWrite

[JulianKrmr]

Following the browse example provided in the examples folder, the value of AttributeIDAccessLevel is always 0, I tested it with a Simulation Server with the permission set to CurrentRead and CurrentWrite and I can use both write and read on the node.

[JulianKrmr]

Can I get a reply to this please? :)

[magiconair]

I'm currently on vacation but can have a look next week when I'm back. @kung-foo maybe you have some time before that?

[JulianKrmr]

Push I would be very thankful for help on this one!

[magiconair]

I'll try to have a look tomorrow

[magiconair]

Hmm, can't reproduce this...

[magiconair]

Wait. I'm testing the wrong method

[magiconair]

Hmm, still works ...

// Copyright 2018-2020 opcua authors. All rights reserved.
// Use of this source code is governed by a MIT-style license that can be
// found in the LICENSE file.

package main

import (
    "context"
    "flag"
    "log"

    "github.com/gopcua/opcua"
    "github.com/gopcua/opcua/debug"
    "github.com/gopcua/opcua/ua"
)

func main() {
    var (
        endpoint = flag.String("endpoint", "opc.tcp://localhost:4840", "OPC UA Endpoint URL")
        nodeID   = flag.String("node", "", "NodeID to read")
    )
    flag.BoolVar(&debug.Enable, "debug", false, "enable debug logging")
    flag.Parse()
    log.SetFlags(0)

    ctx := context.Background()

    c := opcua.NewClient(*endpoint, opcua.SecurityMode(ua.MessageSecurityModeNone))
    if err := c.Connect(ctx); err != nil {
        log.Fatal(err)
    }
    defer c.CloseWithContext(ctx)

    id, err := ua.ParseNodeID(*nodeID)
    if err != nil {
        log.Fatalf("invalid node id: %v", err)
    }

    req := &ua.ReadRequest{
        MaxAge: 2000,
        NodesToRead: []*ua.ReadValueID{
            {NodeID: id, AttributeID: ua.AttributeIDAccessLevel},
        },
        TimestampsToReturn: ua.TimestampsToReturnBoth,
    }

    resp, err := c.ReadWithContext(ctx, req)
    if err != nil {
        log.Fatalf("Read failed: %s", err)
    }
    if resp.Results[0].Status != ua.StatusOK {
        log.Fatalf("Status not OK: %v", resp.Results[0].Status)
    }
    log.Printf("%#v", resp.Results[0].Value.Value())

    resp2, err := c.Node(id).AttributesWithContext(ctx, ua.AttributeIDAccessLevel)
    if err != nil {
        log.Fatalf("AttributesWithContext failed: %s", err)
    }
    if resp2[0].Status != ua.StatusOK {
        log.Fatalf("Status not OK: %v", resp2[0].Status)
    }
    log.Printf("%#v", resp2[0].Value.Value())
}

[JulianKrmr]

Thanks alot for checking, I guess there must be a mistake by my side then. I will look it up on my side again and then will give an update here.

[magiconair]

No worries. I'll close it. Please re-open if necessary.