#!/bin/perl

use warnings;
use strict;

use Time::HiRes qw ( gettimeofday ) ;

my $data = "E"x1020; #start with using 1k blocks shall we?
my %cgi_vars;

foreach my $pair ( split ( "&", $ENV{'QUERY_STRING'} ) )
{
  my ( $var, $val ) = split ("=", $pair);
  $cgi_vars{$var} = $val;
}

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

#take time

my ( $start_seconds, $start_microseconds ) = gettimeofday;
print "$start_seconds  $start_microseconds<BR/>\n";

#print stuff to thingy

if ( $cgi_vars{"data_size"} )
{
   for ( my $count=0; $count < $cgi_vars{"data_size"}; $count++ )
   {
     print "<!",$data,"->\n";
   }
} 

#take time.
my ( $end_seconds, $end_microseconds ) = gettimeofday;
print "$end_seconds  $end_microseconds<BR/>\n";

#compare.

my $time_delta = ($end_seconds - $start_seconds) + ( ( $end_microseconds - $start_microseconds) / 1000000);

if ( $cgi_vars{"data_size"} )
{
  print "your data transfer of ", $cgi_vars{"data_size"}, "k took ", $time_delta, " seconds<BR/>\n";
  print "your bandwidth is ",$cgi_vars{"data_size"} / $time_delta ," kilobytes/sec<BR/>\n";
}
else
{
  print "please invoke as $ENV{'SCRIPT_NAME'}?data_size=100<BR/> \n";
}