gRPC stream error when Token expires - Missing or invalid authentication.

[meteorza]

Hi

Using latest 0.8.3 in Dart VM console app. (same issue with the previous version)

The app is listening to a collection stream. Works without any problems when the app is started, but after 1 hour (which is probably when the token expires), the following "listen onError" appears:

gRPC Error (code: 16, codeName: UNAUTHENTICATED, message: Missing or invalid authentication., details: [])

As a workaround, I have tried:

• Sending collection updates every 5 minutes, which the stream receives without any problems for up to 1 hour.
• Cancel the stream subscription when catching the onError and restarting the stream subscription. Still will not receive the stream updates.
• Cancel the stream subscription when catching the onError, then log out, log back in, subscribe to the stream again, but it still refuses to receive the collection updates.

The rest of the once-off document updates (update and delete) still work without any problem after 1 hour, just the stream that is broken and which I can not seem to recover/reload.

I am not sure what is causing the error, but I am happy to just restart the stream. Is there a specific way to reinitialize the stream in firedart which I am not aware of?

I would appreciate any feedback or suggestions.

[cachapa]

It seems the protobuff models have their own token renewal meachanism which firedart isn't currently using. Unfortunately using those would imply a huge redesign on the entire library since token handling is central to the entire setup.

I'm don't currently have the time to do it so it might make more sense to use another library if you're having trouble with firedart.

[meteorza]

I understand, besides the streaming problem, firedart is just fine for my requirement.

As a workaround, I run the stream subscription in its own isolate. Every 59 minutes I do the following:

• cancel the stream subscription
• sign out
• clear the Token store
• reinitialize FirebaseAuth and Firestore
• sign in
• subscribe to the stream again

Takes about 1 second. After restarting the stream, I get the missed collection documents updates anyway.

Bit of a hack, but it works for me :-)