Cannot get filters for events working, no errors being thrown

[antongisli]

Hi,

Been trying to figure this one out for few days now. No matter how I pass anything into create_pullpoint_service I cannot get the producer (camera) to stop sending all notifications.

I understand the syntax should be XPATH, and probably a TopicExpression.

I've tried calling like this:
params = {"Filter":"tns1:VideoSource/MotionAlarm"}
params = {"Filter":"VideoSource/MotionAlarm"}
params = "tns1:VideoSource/MotionAlarm"
params = {"tns1:VideoSource/MotionAlarm"}

then calling:
pullpoint = mycam.create_pullpoint_service(params)

Similarly, even if I pass in a second attribute to create_pullpoint_service (InitialTerminationTime), it seems to have no effect and is stuck at the default of 60 seconds.

I'm wondering if the library even does anything with the passed in parameters (not implemented?) or I am just doing it wrong :-). Can a kind soul tell me what I'm likely doing wrong?

[antongisli]

OK I've made some progress on this now, at least I can see in wireshark that it's sending the filter and I get a pullpoint subscription response back:

this generates a connection to the camera, why?? no chance to set Filter attribute before creating the param instance ..

params = mycam.events.create_type('CreatePullPointSubscription') 
params.Filter = "tns1:VideoSource/MotionAlarm"

below line returns a pullpoint subscription response.

pp=mycam.events.CreatePullPointSubscription(params) 

Now how to get the response into a pullpoint creation? there doesn't seem to be any way to get the subscription reference into a pullpoint

pp at runtime contains a valid SubscriptionReference. So my guess is that this reference now needs to find its way into PullMessages.
ipdb> pp
(reply){
SubscriptionReference =
(EndpointReferenceType){
Address = "http://192.168.x.x/onvif/Events/PullSubManager_2016-11-10T14:51:34Z_2"
}
CurrentTime = 2016-11-10 15:51:34
TerminationTime = 2016-11-10 15:52:34
}

Trying to pass pp to create_pullpoint_service() doesn't work either:
pullpoint = mycam.create_pullpoint_service(pp)

pullpoint.xaddr does not match the address returned in the pullpoint response, and has no filter associated with it.
ipdb> pullpoint.xaddr
http://192.168.x.x/onvif/Events/PullSubManager_2016-11-10T14:51:17Z_1

[matthax]

I know this is years late but I had the same problem, my solution is here openvideolibs/python-onvif-zeep-async#142