Retry Wamp connection when it fails

[berTrindade]

Hi @oberstet, how are you sir ?

I've been checking out the autobahn-js repo and seeking a way to retry the Wamp connection in case it fails. But after doing that and reading Crossbar's doc, I didn't see any part where that could be achieved.

I want to be able to change both retry_count and will_retry values. But not sure if that'll help.

Would you know if there's a way to do that ?

Best regards,

[oberstet]

please have a look at "automatic reconnection": https://github.com/crossbario/autobahn-js/blob/master/doc/reference.md#connection-options

[berTrindade]

@oberstet, I've already have the -1 set to max_retry, so AFAIK suppose to be unlimited the number of retries.

The error I'm facing is the one from the image below:

WAMP-CRA signature is invalid and wamp.error.not_authorized. I tracked it down and it's happening on this statement: autobahn.auth_cra.sign on onchallenge.

[oberstet]

Well, it seems to indicate an authentication problem - which seems unrelated to auto-reconnect. AutobahnJS will fully reauthenticate for every reconnect. A connection is "reconnected" by creating a fresh connection .. however, there is no language to differentiate between "reconnecting == automatically establish a new connection" and "reconnecting = recover a closed connection by reopening that connection" - the latter doesn't exist, the former is what is meant with "reconnecting"

[berTrindade]

@oberstet But what would you suggest for a case where I need to recover from a closed connection by creating a new connection ?

[oberstet]

no, actually, what you can see from the log is: the client indeed reconnects, but the authentication fails. if the first connect succeeds, but follow ups fail, it could be a client side (your code) bug ... are you recomputing a new signature for the follow up connections (WAMP-CRA has replay protection)

[oberstet]

you can also try to use WAMP-Anon -- run without WAMP-CRA authentication and assure yourself that in this case the automatic reconnect works (eg when you reboot your router). bisect the problem.

[berTrindade]

@oberstet Thank you. We'll handle it with client retry.