sudo cpan
install Task::Plack


##</code><code>##


  return [ 200, [ 'Content-Type' => 'text/html'],
                [ 'hello PSGI world' ]
         ];


##</code><code>##


  print "content-type: text/html\n\n";


##</code><code>##


 listing of action.psgi
 ----------------------

 
 my $app = sub { 

     return [200, [ 'Content-Type' => 'text/plain'],
                  [ 'Hello world' ]
            ];

        };


##</code><code>##


> plackup -s Starman -r action.psgi 


##</code><code>##


Hello world