NaviServer
- programmable web server
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ns_sockcallback(n) 4.99.5 naviserver "NaviServer Built-in Commands"
Name
ns_sockcallback - Register a socket callback script
Description
ns_sockcallback registers a socket callback script. The script should accept the arguments sockid and when. The script will be called according to the value of the when argument as follows: Value of, when Condition under which the script will be called:
r - the socket is readable
w - the socket is writeable
e - the socket has an exceptional condition
x - the server is shutting down
EXAMPLES
set sock [ns_socklisten * 9000]
ns_sockcallback $sock newconn r
# Keep $sock from closing after connection ends
detach $sock
# When a connection arrives, newconn will be called as:
# newconn $sock r
proc newconn {sock when} {
set fds [ns_sockaccept $sock]
set rfd [lindex $fds 0]
set wfd [lindex $fds 1]
puts $wfd "Hello!"
close $rfd
close $wfd
}
See Also
nsd