#!Perl -w
use strict;
use CGI::Pretty qw(:standard :cgi-lib);
use CGI::Carp qw(fatalsToBrowser); # Remove for production code
use CGI::Session;

$CGI::DISABLE_UPLOADS = 1;         # Disable uploads
$CGI::POST_MAX        = 10240; # Maximum number of bytes per post

$| = 1; # Unbuffered output

if (param('Spawn')) {
    # setup monitoring page then spawn the monitored process
    my $cache = CGI::Session->new ();
    my $session = $cache->id();
   
    $cache->param ('status', "wait ..."); # no data yet
    Delete_all();
   
    # parent redirects browser to monitor session
    param('session', $session);
    print redirect (self_url());
    close STDOUT;

    # Rest of this block alters in *nix context to spawn monitored process
    use Win32::Process;
   
    my $job;
   
    Win32::Process::Create (
        $job,
        'c:/Perl/bin/perl.exe', "perl.exe spawned.pl \"$session\"",
        0,
        NORMAL_PRIORITY_CLASS | DETACHED_PROCESS,
        '.'
        );

    exit 0; # all done
 
} elsif (my $session = param('session')) {
    # display monitored data
    my $cache = CGI::Session->new ($session);
    my $data = $cache->param ('status');
   
    if (! $data) { # something is wrong
        showError ("Cache data not available");
        exit 0;
    }
   
    my $headStr = $data eq 'Completed' ? '' : "<meta http-equiv=refresh content=5>";
    print header();
    print start_html (-title => "Spawn Results", -head => [$headStr]);
    print h1("Spawn Results");
    print pre(escapeHTML($data));
    print end_html;
 
} else {
    # display spawn form
    print header(), start_html("Spawn"), h1("Spawn");
    print start_form();
    print submit('Spawn', 'spawn');
   
    my %params = Vars ();
    for my $param (keys %params) {
        print br ("$param -> $params{$param}");
    }
   
    print end_form(), end_html();
}

exit 0;


sub showError {
    print header(), start_html("SpawnError"), h1("Spawn Error");
    print p (shift);
   
    my %params = Vars ();
    for my $param (keys %params) {
        print br ("$param -> $params{$param}");
    }
   
    print end_html();
}

##</code><code>##

#!Perl -w
use strict;
use CGI::Session;

my $session = shift;
my $cache = CGI::Session->load ($session);

$cache->param('status', "configuring ..."); # no data yet

my $end = time () + 20;
my $count = 0;

while (time () < $end) {
    $cache->param ('status', "Count: $count\n");
    $cache->flush ();
    ++$count;
    sleep (1);
}

$cache->param ('status', "Completed");
$cache->flush ();
exit 0; # all done