A Web Log Analyzer Called DuckFeet

Posted in: Technical Track

In this modern world, time is a rare commodity. It’s a well-known fact. It has to be carefully budgeted and thriftily spent. There is never enough time to do everything one wants to do, so we have to prioritize, pick what is important and cut our loses on the rest.

I so wish my brain had gotten the memo on that.

It’s not that my brainpan is teeming with brilliant ideas. It’s just teeming with… very insistent ideas. Ideas that will not let go until I help them burst out of their cognitive cocoon and send them flutter free… and be usually squished on the hard surface of the windshield of reality. But that’s okay. Success or failure, the idea is out and the inner choir of supplicants is down by one, putting me one step closer to neuritic nirvana.

But I’m rambling. What I meant to say is: I have yet to find a web log analyzer that totally satisfy me. For the longest time, I’ve been using awstats. It’s doing a fairly decent job, but I keep thinking that it could be better. And while it’s written in Perl, it has, as chromatic pointed out a strong 1990 flavor, and has some architecture keypoints that make me twitch. Not because they are that stupendously horrid, mind you; I’m just a very twitch-happy kinda guy.

Incidentally, while writing this, I discovered on its website that awstats has hit some snags with Perl
, so like it or not, I might actually be forced to jump ship soon…

Of course, reason tells me I should just grit my teeth, use the fine tool for as long as it’s going to work, and focus my energy on better things. But, the voices… meanies that they are, they wouldn’t let me rest.

So you’ll find on GitHub the first esquisse of DuckFeet, a web log analyzer. The name, by the by, has absolutely nothing to do with DuckDuckGo. I just went with the theme of webbed footprint and wabbling fowls.

The Core

The major thing that gives me that cursed itch with awstats is how it uses a semi-digested statistic file to keep track of its information. I always wanted to replace that with some honest-to-God database backend. The official reason? To make searches easier to implement and extend, and more efficient. The real reason? Because the voices told me so.

Consequently… DuckFeet’s guts are SQLicious, and built as DBIx::Class classes, sprinkled with wonderfully tooth-decaying DBIx::Class::Candy on top. In the repo, it’s all under the DuckFeet::Schema namespace. For the time being, there is only a handful of tables (hits, uris, referers, agents and hosts), but it should be easily extendable to add any type of information we might desire to throw in, but it should be easily extendable to add any type of information we might desire to throw in.

Importing the Log Entries

The main module DuckFeet is a Moose class that is made up (using the awesome MooseX::Role::BuildInstanceOf of two objects: the schema object, and an importer object. The importer, for now, can only be of the Importer class, but the functionality is meant to be turned into a role and implemented by different classes when (or if) the need arises.

And with that, importing a regular Apache log is as easy as:

use strict;
use warnings;
use lib qw/ lib /;
use DuckFeet;
my $duck = DuckFeet->new(
    schema_args => [ 'dbi:SQLite:duck.db' ],
# we have a need for speed
$duck->schema->storage->dbh->do( 'PRAGMA journal_mode=WAL' );
$duck->schema->storage->dbh->do( 'PRAGMA synchronous = OFF' );
$duck->import_file( 't/data/access_log' );

By the way, those two PRAGMA setting up there? They make the difference between an insertion rate of 3 entries per second and 150 entries per second. Seriously. If nothing else, this project reminded me why rtfm’ing is the first optimization technique one should turn to.

Displaying Our Statistics

We have a database shock-full of data to display. How to do it? Well, web-based reporting feels like the most obvious way to go, so let’s whip out Dancer out of the toolbox. The resulting web application, DuckFeet::Viewer, is for now quite simple. It uses Dancer::Plugin::DBIC to interact with the database and gather the number of hit for all visited pages. As I want the data to be somewhat spiffy with the bare minimum of work involved, the template leverages the very nice jQuery DataTables plugin to do the job. And lo and behold:

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2 Comments. Leave new

Weblog analyzer? I thought the entire world is using Splunk by now.

Yanick Champoux
January 5, 2012 8:53 pm

Well, this wee piece of the world doesn’t. :-)

And now that I’ve looked at what is Splunk, it looks more like a general log/system monitoring thingy rather than specialized tool for web logs (which recognizes robots, internal/external referers, sessions, etc), or am I wrong?


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