[REBOL] Checking for broken connections
From: mattsmac::hotmail::com at: 3-Nov-2003 11:48
Ok, I asked this question a while ago and got some good answers, but a
scenario has risen that I wasn't counting on before, and the previous
solution doesn't work.
Suppose you have a sever running:
s: open/lines/no-wait tcp://:8000
v: first s
And a client:
c: open/lines/no-wait tcp://ip-address:8000
well if the client connection closes either because rebol closed down or the
connection was closed with a 'close c' command, you can check if the client
is still connected or not using 'check: copy v' on the server end and as
long as it doesn't return 'none', the connection is still active.
Well I discovered today that if the client computer turns off abrubtly (say
from a power outage) or crashes, that the connection will still come back as
active using this approach. Even though the remote computer is turned off
(obviously disconnected) a copy on the server does not return 'none'. Does
anyone know a solid way to check for this under such circumstances??
Matt
