#!/usr/bin/perl
# http://perlmonks.org/?node_id=1183721
use strict;
use warnings;
use IO::Socket;
use IO::Select;
use Time::HiRes 'time';
@ARGV and $ARGV[0] eq 'tester' and do_test_routine();
my $from;
my $PORTNO = 7090;
my $timerinterval = 5;
my $timedresponse = "default timed response\n";
my $MAXLEN = 512;
my $sock = IO::Socket::INET->new(LocalPort => $PORTNO, Proto => 'udp')
or die $@;
my $sel = IO::Select->new($sock);
my $nexttimer = time + $timerinterval;
for(;;)
{
my $timeout = $nexttimer - time;
if( $timeout <= 0 )
{
warn "timed out @{[int time - $^T]}\n";
if( defined $from ) #send time-triggered status
{
$sock->send($timedresponse, 0, $from);
}
$nexttimer = $timerinterval + time;
}
else
{
for my $fh ( $sel->can_read($timeout) )
{
$from = $fh->recv(my $request, $MAXLEN);
my $response = parseRequest($request);
$fh->send($response, 0, $from);
}
}
}
sub parseRequest
{
warn "got @_";
return "canned response\n";
}
sub do_test_routine # for testing purposes only
{
my $sock = IO::Socket::INET->new(LocalPort => 7091, Proto => 'udp',
PeerPort => 7090, PeerHost => 'localhost',
) or die $@;
$sock->send("a test message\n");
for(;;)
{
$sock->recv(my $buf, 512);
warn "tester got: $buf";
}
}
semi-tested :)
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