Get called_/calling_ae_title

[pazarr]

I'm implementing SCP and I'm not sure how to get calling_/called_ae_title correctly.
I'd like to get called_/calling_ae_title during connection(client sending DICOM image) on the server side. I don't enforce called_ae_title(ae.require_called_aet = False), but set default AE title in SCP. I'd like to use the called_/calling_ae_title for audit purpose.
So, what I can see from the debug log from pytnetdicom SCP that this information is available in the A-ASSOCIATE-RQ PDU

D: Request Parameters:
D: ======================= INCOMING A-ASSOCIATE-RQ PDU ========================
D: Their Implementation Class UID:      1.2.276.0.7230010.3.0.3.6.1
D: Their Implementation Version Name:   OSIRIX_361
D: Application Context Name:    1.2.840.10008.3.1.1.1
D: Calling Application Name:    NO_CLIENT       
D: Called Application Name:     PYDS            
D: Their Max PDU Receive Size:  16384
D: Presentation Context:

According to this document https://pydicom.github.io/pynetdicom/dev/reference/generated/pynetdicom.pdu.A_ASSOCIATE_RQ.html?highlight=calling_ae_title#pynetdicom.pdu.A_ASSOCIATE_RQ.calling_ae_title

I tried this in server side.

from pynetdicom.pdu import (A_ASSOCIATE_RQ, A_ASSOCIATE_AC)
...
...
pdu = A_ASSOCIATE_RQ()
print(type(pdu.calling_ae_title))
print(pdu.calling_ae_title)

My outputs are during connection:

 <class 'bytes'>
b'Default         '

I always got "Default" value instead of real values.

What did I do wrong?
Many thanks!

[scaramallion]

pdu = A_ASSOCIATE_RQ()
print(type(pdu.calling_ae_title))
print(pdu.calling_ae_title)

This creates a new A_ASSOCIATE_RQ() instance from scratch so it will have the default values.

You need to access the A-ASSOCIATE primitive sent during association negotiation:

from pynetdicom import AE, evt
from pynetdicom.sop_class import VerificationSOPClass

def handle_request(event):
    print(event.assoc.requestor.primitive.calling_ae_title)

ae = AE()
ae.add_supported_context(VerificationSOPClass)
ae.start_server(('', 11112), evt_handlers=[(evt.EVT_REQUESTED, handle_request)])