onvif NVT initialize: Exception: DioError [DioErrorType.other]: SocketException

[wmhseir3]

onvif NVT initialize: Exception: DioError [DioErrorType.other]: SocketException

[faithoflifedev]

Hello @wmhseir3, it looks like there is a timeout connecting to your device. The library attempts to connect to "http://$host/onvif/device_service" where in your case host is "192.168.1.101:8899". You can try connecting with another tool like telnet to confirm connectivity between your computer and your Onvif device.

[wmhseir3]

I managed to find another onvif nvt to look into the initialize issue and found another clue which might be new to the issue or related I am not sure. The captured exception screen is as followings:

and the actual envelop received is as followings:

From my understandings, the system.dart is missing the "Extension" Jsonkey, or else, which can be the root cause of the exception.
Am I right on this?
I was then further realized that using those JsonSerializable related *.g.dart files which may be with object coding style preferences. However, it may cause troubles when facing a variety of brands of onvif nvts in the market responding with not expected envelops.

[faithoflifedev]

Hi @wmhseir3,

This looks like a new issue. Without being able to see the Soap XML generated by your device, it's difficult for me to troubleshoot the issue. However, I have made an adjustment to the code and published a new version of the library. This version makes more of the "capabilities" response from the Onvif device optional. So if the device responds with a missing section, it won't error out. This may resolve your issue. If not, we'll look at figuring out the easiest way to get the Soap XML response for your device.

[wmhseir3]

Hi, here is the mentioned xml for the capabilities from the tested nvt
capabilities.txt
.

[faithoflifedev]

Hi @wmhseir3 , try out the new version of the package that I just published - v0.0.8 - it turns out that the WDSL doc related to the code generating the error shows the following:
"SupportedVersions - unbounded; [OnvifVersion]"

Where unbound means that there could be one or more "SupportedVersions". The previous code assumed there was always "more" and tried to de-serialize a List but in the case that there was only one the error you provided was thrown.

The code now handles both cases.