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  9. Extract host or ip address from OPC url string

Extract host or ip address from OPC url string

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08 Sep 2020 12:13 - 08 Sep 2020 12:16 #8871 by support
Replied by support on topic Extract host or ip address from OPC url string
Hello,
I do not understand what you want here.

As far as we (and OPC, and COM, and DCOM) is concerned, "Tunneller:10.10.10.05:Matrikon.OPC.SecurityGateway.1" is the ProgID of the server - which the server vendor has chosen to be formatted in rather special way, but that's their choice.

If it happens to contain somehow encoded IP address of something, we have no way of telling that this is the case. For us (and OPC, and COM, and DCOM) it is just an opaque ProgID string for which there are no general parsing rules.

And the fact that the host comes out is empty is correct. It would be nonempty if the URL has looked something like "opcda://myhost/Tunneller:10.10.10.05:Matrikon.OPC.SecurityGateway.1".

In this particular case, the tunneler has a "local" OPC server, that's what you are connecting to - and that's why the host is empty, and that's why they have encoded the "true" host in the ProgID - but again, that does not concern us.

Regards
Last edit: 08 Sep 2020 12:16 by support.
The following user(s) said Thank You: Andriy

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08 Sep 2020 11:52 #8870 by Andriy
Extract host or ip address from OPC url string was created by Andriy
Hello,

As the title states, how can host or ip address be extracted from the string that is passed into ServerDescriptor class, and then into EasyOpcDa/EasyOpcUa clients' methods?
ServerDescriptor object contains various properties including Host and Uri object. Not sure about simple scenarios, but in our more complex case, the host is set to empty string and the only thing that is separated from the input string is the prefix - "opcda:\\".

Here is the example that needs to be parsed:
"opcda:/Tunneller:10.10.10.05:Matrikon.OPC.SecurityGateway.1"
Most properties in ServerDescriptor object have either "opcda" part or "Tunneller:10.10.10.05:Matrikon.OPC.SecurityGateway.1", but none show the "10.10.10.05" IP address. Is there any way to get the actual host or IP address, Be that with EasyOpc library or any third-party library?

Best regards,
Andriy

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  5. QuickOPC-Classic in .NET
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  9. Extract host or ip address from OPC url string
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