Using LWP::Simple from the Raku ecosystem.
use LWP::Simple;
print LWP::Simple.get("http://www.rosettacode.org");
or, without LWP::Simple:
my $socket = IO::Socket::INET.new(host => "www.rosettacode.org",
port => 80,);
$socket.print("GET / HTTP/1.0\r\n\r\n");
print $socket.recv();
$socket.close;