NAME

Regexp::Log::Common - A regular expression parser for the Common Log Format

SYNOPSIS

my $foo = Regexp::Log::Common->new(
    format  => '%date %request',
    capture => [qw( ts request )],
);

# the format() and capture() methods can be used to set or get
$foo->format('%date %request %status %bytes');
$foo->capture(qw( ts req ));

# this is necessary to know in which order
# we will receive the captured fields from the regexp
my @fields = $foo->capture;

# the all-powerful capturing regexp :-)
my $re = $foo->regexp;

while (<>) {
    my %data;
    @data{@fields} = /$re/;    # no need for /o, it's a compiled regexp

    # now munge the fields
    ...
}

DESCRIPTION

Regexp::Log::Common uses Regexp::Log as a base class, to generate regular expressions for performing the usual data munging tasks on log files that cannot be simply split().

This specific module enables the computation of regular expressions for parsing the log files created using the Common Log Format. An example of this format are the logs generated by the httpd web server using the keyword 'common'.

The module also allows for the use of the Extended Common Log Format.

For more information on how to use this module, please see Regexp::Log.

ABSTRACT

Enables simple parsing of log files created using the Common Log Format or the Extended Common Log Format, such as the logs generated by the httpd/Apache web server using the keyword 'common'.

LOG FORMATS

Common Log Format

my $foo = Regexp::Log::Common->new( format  => ':common' );

The Common Log Format is made up of several fields, each delimited by a single space.

• Fields:

  remotehost rfc931 authuser [date] "request" status bytes

• Example:

  127.0.0.1 - - [19/Jan/2005:21:47:11 +0000] "GET /brum.css HTTP/1.1" 304 0
  
  For the above example:
  remotehost: 127.0.0.1
  rfc931: -
  authuser: -
  [date]: [19/Jan/2005:21:47:11 +0000]
  "request": "GET /brum.css HTTP/1.1"
  status: 304
  bytes: 0

• Available Capture Fields

  * host
  * rfc
  * authuser
  * date
  ** ts (date without the [])
  * request
  ** req (request without the quotes)
  * status
  * bytes

Extended Common Log Format

my $foo = Regexp::Log::Common->new( format  => ':extended' );

The Extended Common Log Format is made up of several fields, each delimited by a single space.

• Fields:

  remotehost rfc931 authuser [date] "request" status bytes "referer" "user_agent"

• Example:

  127.0.0.1 - - [19/Jan/2005:21:47:11 +0000] "GET /brum.css HTTP/1.1" 304 0 "http://birmingham.pm.org/" "Mozilla/2.0GoldB1 (Win95; I)"
  
  For the above example:
  remotehost: 127.0.0.1
  rfc931: -
  authuser: -
  [date]: [19/Jan/2005:21:47:11 +0000]
  "request": "GET /brum.css HTTP/1.1"
  status: 304
  bytes: 0
  "referer": "http://birmingham.pm.org/"
  "user_agent": "Mozilla/2.0GoldB1 (Win95; I)"

• Available Capture Fields

  * host
  * rfc
  * authuser
  * date
  ** ts (date without the [])
  * request
  ** req (request without the quotes)
  * status
  * bytes
  * referer
  ** ref (referer without the quotes)
  * useragent
  ** ua (useragent without the quotes)

BUGS, PATCHES & FIXES

There are no known bugs at the time of this release. However, if you spot a bug or are experiencing difficulties that are not explained within the POD documentation, please submit a bug to the RT system (see link below). However, it would help greatly if you are able to pinpoint problems or even supply a patch.

Fixes are dependent upon their severity and my availability. Should a fix not be forthcoming, please feel free to (politely) remind me by sending an email to barbie@cpan.org .

RT: http://rt.cpan.org/Public/Dist/Display.html?Name=Regexp-Log-Common

SEE ALSO

Regexp::Log

CREDITS

BooK for initially putting the idea into my head, and the thread on a perl message board, that wanted the help that was solved with this exact module.

AUTHOR

Barbie <barbie@cpan.org>
for Miss Barbell Productions, L<http://www.missbarbell.co.uk>

COPYRIGHT AND LICENSE

Copyright © 2005-2012 Barbie for Miss Barbell Productions.

This module is free software; you can redistribute it and/or
modify it under the Artistic License v2.

cpanm Regexp::Log::Common

perl -MCPAN -e shell
install Regexp::Log::Common