Hi monks, While im not able to use the $q->redirect($q->url()) methode, i have written a small script which creates a token, sends it per hidden-tag, and saves it in a session. On a reload, the session value and the POST-data value are the same, and the script prints an error message. This works quite good, except if you hit the submit-button realy realy fast serveral times in a row -than it complains about a reload which never happend. Does anybody know why this happens? 
#!/usr/bin/perl

use strict;
use warnings;
use CGI;
use CGI::Session;
use CGI::Carp qw(fatalsToBrowser);
use Time::HiRes qw(gettimeofday);
use Digest::SHA qw(sha256_hex);
use HTML::Template::Compiled;

my $q = new CGI();
my $token = uniqid();
my $s = new CGI::Session;


my $t = HTML::Template::Compiled->new(path => [ '.' ], filename =>
        'test.tmpl', open_mode => ':utf8', tagstyle => [ '+tt' ], defa
+ult_escape => 'HTML_ALL');

$t->param(token => $token);
print $s->header(), $t->output;

check_reload();
$s->param(token => $q->param('token'));


sub check_reload {

    if( $q->param('token') && ($s->param('token') eq $q->param('token'
+))) {
        print "Error: RELOAD";
    }

}

sub uniqid { 

  my($s,$us)=gettimeofday();
  my($v)=sprintf("%06d%5d%06d",$us,substr($s,-5),$$);
  $v = sha256_hex($v);
  return $v;
}

[download]
test.tmpl: 
<form action="test.pl" method="post">
    <input type="hidden" name="token" value="[%= token%]">
    <input type="submit" value="Submit">
</form>

[download]
Regars,

In reply to (CGI) Prevent a reload from resubmitting a form by fmk

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