use warnings;
use strict;

use PPM::Repositories;
use Encode::Guess;

# OS Call on German WinXP
my $result = `ping -n 1 jenda.krinicky.cz ` . "\n"; 
my $encoding;

#works, as expected.
print "cp437:\n";
$encoding = guess_encoding_cp437($result);
if ( ref( $encoding ) ) {  
	test_ping_result($result, $encoding->name); 
} else {
	print "Couldn't guess encoding.\n";
}

#doesn't work
print "default:\n";
$encoding = guess_encoding_default($result);
if ( ref( $encoding ) ) {  
	test_ping_result($result, $encoding->name); 
} else {
	print "Couldn't guess encoding.\n";
}

#doesn't work.
print "kitchen sink:\n";
$encoding = guess_encoding_default($result);
if ( ref( $encoding ) ) {  
	test_ping_result($result, $encoding->name); 
} else {
	print "Couldn't guess encoding.\n";
}

sub test_ping_result {
	my $result = shift;
	my $encoding = shift;

	Encode::from_to($result,"$encoding",'iso-8859-1');

	print "encoding: $encoding\n";
	print "result: $result\n";

	if ($result =~ /Überprüfen/) { # should match but fails because of german characters
		print "Ping timed out \n";
	} else {
		#good repository.    
		print "Ping ok \n";
	}   
}

sub guess_encoding_cp437 {
	my $data = shift;	
	my $enc = guess_encoding($data, ('cp437'));
	return $enc;
}

sub guess_encoding_default {
	my $data = shift;	
	my $enc = guess_encoding($data);
	return $enc;
}

sub guess_encoding_kitchen_sink {
	my $data = shift;	
	my $enc = guess_encoding($data, ( Encode->encodings() ) );
	return $enc;
}
__END__

Outputs: 

cp437:
encoding: cp437
result: Ping-Anforderung konnte Host "jenda.krinicky.cz" nicht finden. Überprüfen Sie den Namen, und versuchen Sie es erneut.



Ping timed out 
default:
Couldn't guess encoding.
kitchen sink:
Couldn't guess encoding.