上面调用的Regexp::Log::Nginx是base Regexp::Log的实例，CPAN上已经提供了好些server的log regex，见http://search.cpan.org/search?query=Regexp%3A%3Alog&mode=all。
#!/usr/bin/perl
package Regexp::Log::Nginx;
use warnings;
use strict;
use base qw( Regexp::Log );
use vars qw( $VERSION %DEFAULT %FORMAT %REGEXP );
%DEFAULT = (
format => '%date %status %remotehost %domain %request %originhost %responsetime %upstreamtime %bytes %referer %useragent %xforwarderfor',
capture => [ 'ts', 'status', 'remotehost', 'url', 'oh', 'responsetime', 'upstreamtime', 'bytes' ],
);
%FORMAT = (
':default' => '%date %status %remotehost %domain %request %originhost %responsetime %upstreamtime %bytes %referer %useragent %xforwarderfor',
);
%REGEXP = (
'%date' => '(?#=date)\[(?#=ts)\d{2}\/\w{3}\/\d{4}(?::\d{2}){3}(?#!ts) [-+]\d{4}\](?#!date)',
'%status' => '(?#=status)\d+(?#!status)',
'%remotehost' => '(?#=remotehost)\S+(?#!remotehost)',
'%domain' => '(?#=domain).*?(?#!domain)',
'%request' => '(?#=request)-|(?#=method)\w+(?#!method) (?#=url).*?(?#!url) (?#=version)HTTP/\d\.\d(?#!version)(?#!request)',
'%originhost' => '(?#=originhost)-|(?#=oh).*?(?#!oh):\d+(?#!originhost)',
'%responsetime' => '(?#=responsetime)-|.*?(?#!responsetime)',
'%upstreamtime' => '(?#=upstreamtime).*?(?#!upstreamtime)',
'%bytes' => '(?#=bytes)\d+(?#!bytes)',
'%referer' => '(?#=referer)\"(?#=ref).*?(?#!ref)\"(?#!referer)',
'%useragent' => '(?#=useragent)\"(?#=ua).*?(?#!ua)\"(?#!useragent)',
'%xforwarderfor' => '(?#=xforwarderfor)\"(?#=xff).*?(?#!xff)\"(?#!xforwarderfor)',
);
1;
