SYNOPSIS

  # Place this in your Apache's httpd.conf file
  PerlLogHandler Apache::DBILogger

  PerlSetVar DBILogger_data_source    DBI:mysql:httpdlog
  PerlSetVar DBILogger_username       httpduser
  PerlSetVar DBILogger_password       secret
  PerlSetvar DBILogger_table          requests

Create a database with a table named requests like this:

\s-1CREATE\s0 \s-1TABLE\s0 requests (

  server varchar(127) \s-1DEFAULT\s0 '' \s-1NOT\s0 \s-1NULL\s0,
  bytes mediumint\|(9) \s-1DEFAULT\s0 '0' \s-1NOT\s0 \s-1NULL\s0,
  user varchar(15) \s-1DEFAULT\s0 '' \s-1NOT\s0 \s-1NULL\s0,
  filename varchar(200) \s-1DEFAULT\s0 '' \s-1NOT\s0 \s-1NULL\s0,
  remotehost varchar(150) \s-1DEFAULT\s0 '' \s-1NOT\s0 \s-1NULL\s0,
  remoteip varchar(15) \s-1DEFAULT\s0 '' \s-1NOT\s0 \s-1NULL\s0,
  status smallint\|(6) \s-1DEFAULT\s0 '0' \s-1NOT\s0 \s-1NULL\s0,
  timeserved datetime \s-1DEFAULT\s0 '0000-00-00 00:00:00' \s-1NOT\s0 \s-1NULL\s0,
  contenttype varchar(50) \s-1DEFAULT\s0 '' \s-1NOT\s0 \s-1NULL\s0,
  urlpath varchar(200) \s-1DEFAULT\s0 '' \s-1NOT\s0 \s-1NULL\s0,
  referer varchar(250) \s-1DEFAULT\s0 '' \s-1NOT\s0 \s-1NULL\s0,
  useragent varchar(250) \s-1DEFAULT\s0 '' \s-1NOT\s0 \s-1NULL\s0,
  usertrack varchar(100) \s-1DEFAULT\s0 '' \s-1NOT\s0 \s-1NULL\s0,
  \s-1KEY\s0 server_idx (server),
  \s-1KEY\s0 timeserved_idx (timeserved)

);

Please note that for some databases (notably, PostgreSQL) you will need to double-quote the user column name (that is, to specify it as \*(C`"user" varchar(15)\*(C') in order for the database not to mistake it with a keyword.

Its recommended that you include

use Apache::DBI; use \s-1DBI\s0; use Apache::DBILogger;

in your startup.pl script. Please read the Apache::DBI documentation for further information.

DESCRIPTION

This module tracks what's being transfered by the Apache web server in a \s-1SQL\s0 database (everything with a \s-1DBI/DBD\s0 driver). This allows one to get statistics (of almost everything) without having to parse the log files (like the Apache::Traffic module, just in a \*(L"real\*(R" database, and with a lot more logged information).

Apache::DBILogger will track the cookie from 'mod_usertrack' if it's there.

After installation, follow the instructions in the synopsis and restart the server.

The statistics are then available in the database. See the section \s-1VIEWING\s0 \s-1STATISTICS\s0 for more details.

PREREQUISITES

You need to have compiled mod_perl with the LogHandler hook in order to use this module. Additionally, the following modules are required:

o DBI o Date::Format

INSTALLATION

To install this module, move into the directory where this file is located and type the following:

perl Makefile.PL make make test make install

This will install the module into the Perl library directory.

Once installed, you will need to modify your web server's configuration file so it knows to use Apache::DBILogger during the logging phase.

VIEWING STATISTICS

Please see the bin/ directory in the distribution for a statistics script.

Some funny examples on what you can do might include:

hit count and total bytes transfered from the virtual server www.company.com

select count(id),sum(bytes) from requests where server="www.company.com"

hit count and total bytes from all servers, ordered by number of hits

select server,count(id) as hits,sum(bytes) from requests group by server order by hits desc

count of hits from macintosh users

select count(id) from requests where useragent like "%Mac%" This is pretty unoptimal. It would be faster to calculate the dates in perl and write them in the sql query using f.x. Date::Format.

hits and total bytes from www.company.com on mondays.

select count(id),sum(bytes) from requests where server="www.company.com" and dayofweek(timeserved) = 2

It's often pretty interesting to view the referer info too.

See your sql server documentation of more examples. I'm a happy mySQL user, so I would continue on

http://www.tcx.se/Manual_chapter/manual_toc.html

LOCKING ISSUES

MySQL 'read locks' the table when you do a select. On a big table (like a large httpdlog) this might take a while, where your httpds can't insert new logentries, which will make them 'hang' until the select is done.

One way to work around this is to create another table (f.x. requests_insert) and get the httpd's to insert to this table.

Then run a script from crontab once in a while which does something like this:

LOCK TABLES requests WRITE, requests_insert WRITE insert into requests select * from requests_insert delete from requests_insert UNLOCK TABLES

You can use the moverows.pl script from the bin/ directory.

Please note that this won't work if you have any unique id field! You'll get duplicates and your new rows won't be inserted, just deleted. Be careful.

TRAPS

I've experienced problems with 'Packets too large' when using Apache::DBI, mysql and DBD::mysql 2.00 (from the Msql-mysql 1.18x packages). The DBD::mysql module from Msql-mysql 1.19_17 seems to work fine with Apache::DBI.

You might get problems with Apache 1.2.x. (Not supporting post_connection?)

MOD_PERL 2 SUPPORT

The official version of this module, as Ask Bjoern Hansen last modified it, lacks support for the \s-1API\s0 changes introduced with Apache 2.x and the corresponding mod_perl 2.x - Of course, this is quite understandable as this module was last updated in 1998 ;-) But anyway, the module does its job still quite fine, and users still require its functionality.

For any help requests regarding this module on Apache 2 systems, contact Gunnar Wolf <[email protected]> directly. If your system is based on Debian GNU/Linux, you can use the regular Debian bugtracking facilities, as the multi-API patch was introduced specifically for Debian.

SUPPORT

This module is supported via the mod_perl mailinglist ([email protected], subscribe by sending a mail to [email protected]).

I would like to know which databases this module have been tested on, so please mail me if you try it.

The latest version can be found on your local \s-1CPAN\s0 mirror or at \*(C`ftp://ftp.netcetera.dk/pub/perl/\*(C'

AUTHOR

Copyright (C) 1998, Ask Bjoern Hansen <[email protected]>. All rights reserved. This module is free software; you may redistribute it and/or modify it under the same terms as Perl itself.

RELATED TO Apache::DBILogger…

perl\|(1), mod_perl\|(3)