use strict; use warnings; 
  select (STDOUT); $| = 1; select(STDOUT);

# http://127.0.0.1/exit
# http://127.0.0.1/hi
# http://127.0.0.1/null
# http://127.0.0.1/unknown 

  use IO::Handle;
  use IO::Socket;
  use IO::Select;
  my $server = IO::Socket::INET->new( Proto     => 'tcp',
                                     PeerAddr  => "127.0.0.1",  # only us  
                                     LocalPort => 80,
                                     Listen    => SOMAXCONN,
                                     Reuse     => 1);

  die "can't setup server on 80" unless $server;

  my $sel_read  = IO::Select->new();
  my $sel_write = IO::Select->new();
  my $sel_error = IO::Select->new();
  $sel_read-> add($server);

  my $cmdrun={}; 
  $cmdrun->{'/exit'}  =sub{exit;} ;
  $cmdrun->{'/hi'}    =sub{my $fh=shift; print $fh "\nhi\n";} ;
  $cmdrun->{'/null'}  =sub{} ;


  while(1) { 
    checkforrequests(); 
    } # superloop 

exit; 

sub checkforrequests { 
    my $timeout=1; 
    my ($rd_ptr,$wr_ptr,$er_ptr)=IO::Select->select($sel_read,undef,$sel_error,$timeout);
    for my $fh (@$rd_ptr) {
      if ($fh == $server) {
          my $client = $server->accept;
          $client->autoflush(1);
          $sel_read->add($client);
         } # server 
      else { 
          my $line=<$fh>; 
          print "line:$line";  
          my ($junk,$post)=split(' ',$line,3); 
          my $cmd=$cmdrun->{$post}; 
          if ($cmd) {&$cmd($fh);} 
          else {  print $fh "\n\nNO\n";  } 
          $sel_read->remove($fh);
          close $fh;
          } # client 
      } # for fh 
} # checkforrequests