Client ping

[Luigi Paioro]

Dear all,

   the pre-Trieste working draft foresaw that a callable client had to 
implement a samp.client.ping() method (as it still happens for the hub). 
In the last draft, this method has been substituted with an 
administrative client message "samp.app.ping".
   This message could be used by the hub to test whether the registered 
callable clients are still alive or died in an unpredictable way. If a 
client dies and doesn't respond to a "samp.app.ping" message, then it 
can be removed from the list of registered clients.
   Anyway a callable client is not supposed to be subscribed to a ping 
message and then there can be situations where a callable client which 
is not subscribed to a ping message can remain as registered with the 
hub forever, even if it died.
   A possible way to overcome this problem is the introduction of a 
client inactivity timeout, something very similar to the usual 
connection or session timeout in the common client/server model. If a 
client remains inactive for more that a specified time, then it is 
automatically unregistered.
   This is applicable to every client, even if they are not callable, so 
it is a more general solution respect the ping message test.

   What do you think about this proposal?


Regards,

   Luigi