Hello guys,

I'm trying to do a tcp socket server which will send a message to all clients connected every 10s, like a heartbeat.

I managed to do it using IO::Socket::INET only, but the code only handle a single connection, so when the client dies, the server dies too.

Searching, I found a way to do it with IO::Select, but I can't make it work too.

It doesn't send the 'HeartBeat' and still when I stop the a client the server stops too. Can you guys help me to find what I'm doing wrong?

Here the codes:

server.pl

#!/usr/bin/perl -w
use strict;
use warnings;
use IO::Socket;
use IO::Select;

# auto-flush on socket
$| = 1;

my $server_ip;
my $server_port;

($server_ip,$server_port)=('127.0.0.1', 5000);

# creating a listening socket
my $tcp_socket = new IO::Socket::INET(
    LocalHost => $server_ip,
    LocalPort => $server_port,
    Proto => 'tcp',
    Listen => 5,
    Reuse => 1
);
die "cannot create socket $!\n" unless $tcp_socket;
print "server waiting for client connection on port $server_port\n";


my $read_select = IO::Select->new();

$read_select->add($tcp_socket);

my $hello ="Hello <VERSION>\n";

while(1){
    my $new_readable;
    my $nick;

    ($new_readable)=IO::Select->select($read_select,undef,undef,0);
    foreach my $read(@$new_readable){
        if($read==$tcp_socket){
            my $new_connection = $read->accept();
            $new_connection->send($hello);
            $read_select->add($new_connection);
        }else{
            my $buf;
            my $msg;
            $buf='HeartBeat';
            if($buf){
                my @sockets = $read_select->can_write();
                foreach my $sck(@sockets){
                    $sck->send("$buf\n");
                }
            }else{
                $read_select->remove($read);
            }

        }

    }
}


$tcp_socket->close();

[download]

client.pl

#!/usr/bin/perl
#tcpclient.pl

use IO::Socket::INET;

use CGI;
use CGI::Carp qw(fatalsToBrowser warningsToBrowser);

$| = 1;

my ($socket,$client_socket);

$socket = new IO::Socket::INET (
    PeerAddr => '127.0.0.1',
    PeerPort => '5000',
    Proto => 'tcp'
) or die "ERROR in Socket Creation : $! $@\n";

print "TCP Connection Success.\n";

while(1){
    $socket->recv($data,1024);
    print "Received from Server : $data\n";

}
$socket->close();

[download]

In reply to How do I make a tcp socket heartbeat? by pudda

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