Need auto-reconnect in sail.strophe.js to fix "improper-addressing" error

[zuk]

Seeing these errors occasionally:

FAILED TO CONNECT TO XMPP SERVER AS [email protected] BECAUSE: improper-addressing (connect_connfail)

Seems to happen when the tablet/client momentarily looses internet connectivity. Fix might be to catch this error and try to automatically reconnect.

[zuk]

Turns out that this isn't going to be easy.

educoder/sail.js@49210a5 is an attempt at implementing auto-reconnect, but I'm not sure it works. Strophe already does a bunch of magic to buffer messages until they can be sent out, and it looks like it may already be doing its own auto-reconnect.

In any case the improper-addressing error seems to be generated by the server once the client has been offline too long. I tried increasing mod_http_bind's max_inactivity from 20 seconds to 60 seconds, and I'm hoping this will make the server more tolerant. Making the timeout any longer is problematic because Strophe has it's own built-in 66 second timeout... we can extend this too, but that might lead to yet other problems and necessary adjustments.

Long term I wonder if the solution will be a switch from BOSH to WebSockets. In theory we should get simpler, more reliable connectivity with WebSockets, but not sure how soon that will happen.