Load nodeset xml into server

[pfetrial]

hello everyone.
I wish you a happy new year!
I have a question concerning the python server : Is it possible to load a information model ( Xml) into a server ? If yes how ? I haven't seen some functions related to this .. thanks

[AndreasHeine]

python-opcua/opcua/server/server.py

Line 513 in 1cca33d

def import_xml(self, path=None, xmlstring=None):

python-opcua/examples/server-import-robot-nodeset.py

Line 15 in 1cca33d

server.import_xml("../schemas/UA-Nodeset/DI/Opc.Ua.Di.NodeSet2.xml")

[xenonforlife]

Hi @AndreasHeine, @swamper123, @oroulet I am trying to do the same as OP. I cloned the repo on Windows 10 and the test server runs fine. However when I am trying to run the server-import-robot-nodeset.py file, I am always getting a "No such file or directory error". I made sure that the appropriate nodesets are all available in the schemas folder and further within the appropriate folders e.g. DI and Robotics. I still cannot make python find the xml files somehow. I also tried using Path from the pathlib library to resolve any path problems. However it still doesn't work. The only way I could make it work was using absolute paths, which unfortunately is not the solution I am looking for. Even if I copy the nodeset files into the same examples folder (as the server-import-robot-nodeset.py file) and change the argument of server.import to just "Opc.Ua.Di.NodeSet2.xml", it still does not find the file. Could you please help me here?

[AndreasHeine]

os.path() module ?

i used this alot:

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
server.import_xml(os.path.join(BASE_DIR, "nodeset", "Opc.Ua.Di.NodeSet2.xml"))

[xenonforlife]

Haven't tried that since I am on Python 3.7 so the recommended way is pathlib.Path. Anyway I will give it a shot and report back. Thanks for your super quick reply!

[xenonforlife]

@AndreasHeine Worked like a charm, thank you so much!

[pfetrial]

Oh thanks . I haven’t seen this API. Von: Andreas Heine <notifications@github.com> Gesendet: Freitag, 1. Januar 2021 10:30 An: FreeOpcUa/python-opcua <python-opcua@noreply.github.com> Cc: pfetrial <patrick.frey37@sfr.fr>; Author <author@noreply.github.com> Betreff: Re: [FreeOpcUa/python-opcua] Load nodeset xml into server (#1202) https://github.com/FreeOpcUa/python-opcua/blob/1cca33dd5fb70858b5e811b08356ca97520bcbaf/opcua/server/server.py#L513 — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#1202 (comment)> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAOAXGWCMEB3ALI3LOMXYB3SXWI2FANCNFSM4VQEGYPA> . <https://github.com/notifications/beacon/AAOAXGVBGDO22OCEDR3QEHTSXWI2FA5CNFSM4VQEGYPKYY3PNVWWK3TUL52HS4DFWFCGS43DOVZXG2LPNZBW63LNMVXHJKTDN5WW2ZLOORPWSZGOAAB6KPQ.gif>

[pfetrial]

Hello Everyone,
I succeded to import a xml file into the server. Some xml file are not imported , iat this moment I can't figure out what are the criterias to succed or not, but perhaps It depends on the complexity of the file, size of the file?...
I have seen that the flag "ishistorizing" is not imported . ( it is always false in the server)
Is the possibility to have a callback function when the import function adds an item in the tree?
Thx

[swamper123]

Some Nodes are not imported or XML-Files are not imported?

[AndreasHeine]

"ishistorizing" thats right, it is set if you add historizing for thtat node its not part of the xml import!
look in the historizing examples to see how it works!

python-opcua/examples/server-datavalue-history.py

Line 36 in 1cca33d

server.historize_node_data_change(myvar, period=None, count=100)

[oroulet]

the list of imported nodeid is returned by the import_xml() method and hoepfully a log is written when node is not imported (not sure about the latest)

[swamper123]

Nodes are returned, problematic references and nodes are logged as warning in that method.