I suffered a lot from lagging network (http/https) at $work and needed some proof for the ICT support desk to backup my claims and force them to take some action. So, I wrote this little piece of code to generate simple timing statistics for gnuplot.

#! /usr/bin/perl

use strict;
use warnings;
use English qw( -no_match_vars );
use WWW::Mechanize;

use constant TRUE => 1;

{
    usage() if @ARGV != 2;        
    
    my $url       = shift;
    my $data_file = shift;
    
    my ($fj, $start, $end, $spent, $gap, $date, $resp);
    
    my $fh;
    
    open( $fh, '>', $data_file ) or die "Unable to open '$data_file' :
+ $OS_ERROR";
    
    my $mech = WWW::Mechanize->new();
    
    while ( TRUE ) {
        
        my($hour, $min) = (localtime())[2,1];        
        $date           = sprintf("%02d:%02d", $hour, $min);
        
        $start = time();
        $resp  = undef;
        if( eval { $resp = $mech->get($url); 1 } ) {
            $end   = time();
            $spent = $end - $start;
        } else {
            $spent = undef;           
        }

        print $fh "$date\t" . (defined($spent) ? $spent : 'undef') . "
+\n";
        print "$date\t" . (defined($spent) ? $spent : 'undef') . "\n";

        if( $spent ) {
            $gap = ( $spent >= 30  ? 0 : 30 - $spent );
        } else {
            $gap = 30;   
        }
                
        sleep $gap;
    }
    
}

sub usage {
 
    print <<"EOF";
    
  Usage: $PROGRAM_NAME <url> <outfile>
  
  Fetch <url> and write the time spent (in seconds) into <outfile>. 
  
  URL is fetched every 30 seconds. The time spent fetching the URL is 
  subtracted from the sleeped time and is set to zero if it exceeds
  30 seconds.
  
  Timing infor is printed into the outfile and STDOUT in the following
  format:
  
    hour:min\\t<seconds>
    
  For example
  
    13:53   0
    13:54   1    
          
EOF

    exit 1;
}

[download]

With the help of this little scripture I convinced the ICT support to put my IP address in the proxy-by-pass list and now I am free to surf the internet! :-)

--
seek $her, $from, $everywhere if exists $true{love};

In reply to Monitoring my www traffic lag by puudeli

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