Check Whether a Socket Is Writable

See more Socket/SSL/TLS Examples

Demonstrates Socket.CheckWriteable, which waits for the connected socket to become writable. It returns 1 if writable, 0 if it did not become writable before the timeout, or -1 on error.

load ./chilkat.dll

set success 0

set socket [new_CkSocket]

#  Connect to the server using TLS.
set bTls 1
set maxWaitMs 5000
set success [CkSocket_Connect $socket "example.com" 5000 $bTls $maxWaitMs]
if {$success == 0} then {
    puts [CkSocket_lastErrorText $socket]
    delete_CkSocket $socket
    exit
}

#  Wait up to 5 seconds for the socket to become writable.  Returns 1 if writable, 0 if it did not
#  become writable before the timeout, or -1 on error.
set writable [CkSocket_CheckWriteable $socket 5000]
if {$writable < 0} then {
    puts [CkSocket_lastErrorText $socket]
    delete_CkSocket $socket
    exit
}

if {$writable != 1} then {
    puts "The socket did not become writable before the timeout."
    delete_CkSocket $socket
    exit
}

puts "The socket is writable."

delete_CkSocket $socket