You are looking at a very old, but free version of the course. If you are interesed the most recent version, check it out on the Perl Maven site.

9.3. Simple Echo Server

The Simple Echo Server lets you telnet to it and echos back every word you type.

Example 9-3. examples/server/

use strict;
use warnings;

use lib 'lib';
use SimpleEchoServer;

SimpleEchoServer->run(port => 8000);

Example 9-4. examples/server/lib/

package SimpleEchoServer;
use warnings;
use strict;

use base 'Net::Server';
my $EOL   = "\r\n";

sub process_request {
    my $self = shift;
    while( my $line = <STDIN> ) {
        $line =~ s/\r?\n$//;
        print qq(You said "$line"$EOL);
        last if $line eq "bye";


If you are interested in on-site trainings by the author, please contact me directly.