Dear fellow monks,

I am writing a simple parser application for parsing tomcat localhost_access.log file to get the number or http requests , number of unique files requested etc, and here is the code snippet,

use Data::Dumper::Simple;
print "Welcome to Tomcat Access Log Parser\n";
$LogFile =
  "C:\\Documents and Settings\\snra\\Desktop\\localhost_access_log.txt
+";

  my $http_code_200_count,$http_code_404_count,$unique_ip_count,$uniqu
+e_ip_journal_mf;

my @response_array      = ();


use vars qw/
  $element_host
  $element_logname
  $element_date
  $element_method
  $element_url
  $element_code
  $element_size
  $element_referrer
  $element_agent
  /;

my @field = ();
@attriubtelib = (
    'host', 'logname',  'date', 'method', 'url', 'code',
    'size', 'referrer', 'agent'
);


$TomcatLogFormat = '';

# $PerlParsingFormat="([^ ]+) [^ ]+ ([^\\/\\[]+) \\[([^ ]+) [^ ]+\\] \
+\\"([^ ]+) (.+) [^\\\"]+\\\" ([\\d|-]+) ([\\d|-]+) \\\"(.*?)\\\" \\\"
+([^\\\"]*)\\\"";
$TomcatLogFormat =
"([^ ]+) [^ ]+ ([^\\/\\[]+) \\[([^ ]+) [^ ]+\\] \\\"([^ ]+) ([^ ]+)(?:
+ [^\\\"]+|)\\\" ([\\d|-]+) ([\\d|-]+) \\\"(.*?)\\\" \\\"([^\\\"]*)\\\
+"";
$element_host     = 0;
$element_logname  = 1;
$element_date     = 2;
$element_method   = 3;
$element_url      = 4;
$element_code     = 5;
$element_size     = 6;
$element_referrer = 7;
$element_agent    = 8;

$TomcatLogFormat = qr/^$TomcatLogFormat/;



open( LOG, "$LogFile" )
  || die("Couldn't open tomcat access log file \"$LogFile\" : $!");

while ( $line = <LOG> ) {
    my %single_response_map = ();
    chomp $line;
    $line =~ s/\r$//;


    if ( !( @field = map( /$TomcatLogFormat/, $line ) ) ) {
        print "Line did not match the format !!!! - $line ";
    }


    for ( $i = 0 ; $i < @field ; ++$i ) {

        $single_response_map{ $attriubtelib[$i] } = $field[$i];
    }
    push @response_array,\%single_response_map;

}
print Dumper @response_array;
[download]

This will dump an array of hashes. For example each element of array will look like ,

 
                    {
                      'date' => '15/Dec/2010:12:36:21',
                      'referrer' => '-',
                      'size' => '1046',
                      'host' => '192.0.0.222',
                      'logname' => '-',
                      'agent' => 'Mozilla/4.0 (compatible; MSIE 6.0; W
+indows NT 5.1; SV1)',
                      'url' => '/folder/File1/data1.txt',
                      'method' => 'GET',
                      'code' => '200'
                    }
[download]

Each hash corresponds to a http request in log file. I need to get the count of unique IP addresses , count of unique URLs and count of unique requests based on different http status codes. Please help me in getting the counts from this hashmap using any quick methods. Else i will have to iterate individually with many flags in place.

Thanks in Advance.