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iwla

Introduction

iwla (Intelligent Web Log Analyzer) is basically a clone of awstats. The main problem with awstats is that it's a very monolothic project with everything in one big PERL file. In opposite, iwla has be though to be very modular : a small core analysis and a lot of filters. It can be viewed as UNIX pipes. Philosophy of iwla is : add, update, delete ! That's the job of each filters : modify statistics until final result.

Nevertheless, iwla is only focused on HTTP logs. It uses data (robots definitions, search engines definitions) and design from awstats. Moreover, it's not dynamic, but only generates static HTML page (with gzip compression option).

Usage

./iwla [-c|--clean-output] [-i|--stdin] [-f FILE|--file FILE] [-d LOGLEVEL|--log-level LOGLEVEL]

-c : Clean output (database and HTML) before starting
-i : Read data from stdin instead of conf.analyzed_filename
-f : Read data from FILE instead of conf.analyzed_filename
-d : Loglevel in ['DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL']

Basic usage

In addition to command line, iwla read parameters in default_conf.py. User can override default values using conf.py file. Each module requires its own parameters.

Main values to edit are :

  • analyzed_filename : web server log
  • domaine_name : domain name to filter
  • pre_analysis_hooks : List of pre analysis hooks
  • post_analysis_hooks : List of post analysis hooks
  • display_hooks : List of display hooks
  • locale : Displayed locale (en or fr)

Then, you can then iwla. Output HTML files are created in output directory by default. To quickly see it go in output and type

python -m SimpleHTTPServer 8000

Open your favorite web browser at http://localhost:8000. Enjoy !

Warning : The order is hooks list is important : Some plugins may requires others plugins, and the order of display_hooks is the order of displayed blocks in final result.

Interesting default configuration values

  • DB_ROOT : Default database directory (default ./output_db)
  • DISPLAY_ROOT : Default HTML output directory (default ./output)
  • log_format : Web server log format (nginx style). Default is apache log format
  • time_format : Time format used in log format
  • pages_extensions : Extensions that are considered as a HTML page (or result) in opposit to hits
  • viewed_http_codes : HTTP codes that are cosidered OK (200, 304)
  • count_hit_only_visitors : If False, doesn't cout visitors that doesn't GET a page but resources only (images, rss...)
  • multimedia_files : Multimedia extensions (not accounted as downloaded files)
  • css_path : CSS path (you can add yours)
  • compress_output_files : Files extensions to compress in gzip during display build

Plugins

As previously described, plugins acts like UNIX pipes : statistics are constantly updated by each plugin to produce final result. We have three type of plugins :

  • Pre analysis plugins : Called before generating days statistics. They are in charge to filter robots, crawlers, bad pages...
  • Post analysis plugins : Called after basic statistics computation. They are in charge to enlight them with their own algorithms
  • Display plugins : They are in charge to produce HTML files from statistics.

To use plugins, just insert their name in pre_analysis_hooks, post_analysis_hooks and display_hooks lists in conf.py.

Statistics are stored in dictionaries :

  • month_stats : Statistics of current analysed month
  • valid_visitor : A subset of month_stats without robots
  • days_stats : Statistics of current analysed day
  • visits : All visitors with all of its requests
  • meta : Final result of month statistics (by year)

Create a Plugins

To create a new plugin, it's necessary to create a derived class of IPlugin (_iplugin.py) in the right directory (plugins/xxx/yourPlugin.py).

Plugins can defines required configuration values (self.conf_requires) that must be set in conf.py (or can be optional). They can also defines required plugins (self.requires).

The two functions to overload are load(self) that must returns True or False if all is good (or not). It's called after init. The second is hook(self) that is the body of plugins.

For display plugins, a lot of code has been wrote in display.py that simplify the creation on HTML blocks, tables and bar graphs.

Plugins

Optional configuration values ends with *.

iwla

Main class IWLA
Parse Log, compute them, call plugins and produce output
For now, only HTTP log are valid

Plugin requirements :
    None

Conf values needed :
    analyzed_filename
    domain_name
    locales_path
    compress_output_files*

Output files :
    DB_ROOT/meta.db
    DB_ROOT/year/month/iwla.db
    OUTPUT_ROOT/index.html
    OUTPUT_ROOT/year/month/index.html

Statistics creation :

meta :
    last_time
    start_analysis_time
    stats =>
        year =>
            month =>
                viewed_bandwidth
                not_viewed_bandwidth
                viewed_pages
                viewed_hits
                nb_visits
                nb_visitors

month_stats :
    viewed_bandwidth
    not_viewed_bandwidth
    viewed_pages
    viewed_hits
    nb_visits

days_stats :
    day =>
        viewed_bandwidth
        not_viewed_bandwidth
        viewed_pages
        viewed_hits
        nb_visits
        nb_visitors

visits :
   remote_addr =>
       remote_addr
       remote_ip
       viewed_pages
       viewed_hits
       not_viewed_pages
       not_viewed_hits
       bandwidth
       last_access
       requests =>
           [fields_from_format_log]
           extract_request =>
               extract_uri
               extract_parameters*
           extract_referer* =>
               extract_uri
               extract_parameters*
       robot
       hit_only
       is_page

valid_visitors:
    month_stats without robot and hit only visitors (if not conf.count_hit_only_visitors)

Statistics update :
    None

Statistics deletion :
    None

plugins.display.top_downloads

Display hook

Create TOP downloads page

Plugin requirements :
    post_analysis/top_downloads

Conf values needed :
    max_downloads_displayed*
    create_all_downloads_page*

Output files :
    OUTPUT_ROOT/year/month/top_downloads.html
    OUTPUT_ROOT/year/month/index.html

Statistics creation :
    None

Statistics update :
    None

Statistics deletion :
    None

plugins.display.all_visits

Display hook

Create All visits page

Plugin requirements :
    None

Conf values needed :
    display_visitor_ip*

Output files :
    OUTPUT_ROOT/year/month/all_visits.html
    OUTPUT_ROOT/year/month/index.html

Statistics creation :
    None

Statistics update :
    None

Statistics deletion :
    None

plugins.display.top_hits

Display hook

Create TOP hits page

Plugin requirements :
    post_analysis/top_hits

Conf values needed :
    max_hits_displayed*
    create_all_hits_page*

Output files :
    OUTPUT_ROOT/year/month/top_hits.html
    OUTPUT_ROOT/year/month/index.html

Statistics creation :
    None

Statistics update :
    None

Statistics deletion :
    None

plugins.display.referers

Display hook

Create Referers page

Plugin requirements :
    post_analysis/referers

Conf values needed :
    max_referers_displayed*
    create_all_referers_page*
    max_key_phrases_displayed*
    create_all_key_phrases_page*

Output files :
    OUTPUT_ROOT/year/month/referers.html
    OUTPUT_ROOT/year/month/key_phrases.html
    OUTPUT_ROOT/year/month/index.html

Statistics creation :
    None

Statistics update :
    None

Statistics deletion :
    None

plugins.display.top_visitors

Display hook

Create TOP visitors block

Plugin requirements :
    None

Conf values needed :
    display_visitor_ip*

Output files :
    OUTPUT_ROOT/year/month/index.html

Statistics creation :
    None

Statistics update :
    None

Statistics deletion :
    None

plugins.display.top_pages

Display hook

Create TOP pages page

Plugin requirements :
    post_analysis/top_pages

Conf values needed :
    max_pages_displayed*
    create_all_pages_page*

Output files :
    OUTPUT_ROOT/year/month/top_pages.html
    OUTPUT_ROOT/year/month/index.html

Statistics creation :
    None

Statistics update :
    None

Statistics deletion :
    None

plugins.post_analysis.top_downloads

Post analysis hook

Count TOP downloads

Plugin requirements :
    None

Conf values needed :
    None

Output files :
    None

Statistics creation :
    None

Statistics update :
month_stats:
   top_downloads =>
       uri

Statistics deletion :
    None

plugins.post_analysis.top_hits

Post analysis hook

Count TOP hits

Plugin requirements :
    None

Conf values needed :
    None

Output files :
    None

Statistics creation :
    None

Statistics update :
month_stats:
   top_hits =>
       uri

Statistics deletion :
    None

plugins.post_analysis.referers

Post analysis hook

Extract referers and key phrases from requests

Plugin requirements :
    None

Conf values needed :
    domain_name

Output files :
    None

Statistics creation :
    None

Statistics update :
month_stats :
   referers =>
       pages
       hits
   robots_referers =>
       pages
       hits
   search_engine_referers =>
       pages
       hits
   key_phrases =>
       phrase

Statistics deletion :
    None

plugins.post_analysis.reverse_dns

Post analysis hook

Replace IP by reverse DNS names

Plugin requirements :
    None

Conf values needed :
    reverse_dns_timeout*

Output files :
    None

Statistics creation :
    None

Statistics update :
valid_visitors:
   remote_addr
   dns_name_replaced
   dns_analyzed

Statistics deletion :
    None

plugins.post_analysis.top_pages

Post analysis hook

Count TOP pages

Plugin requirements :
    None

Conf values needed :
    None

Output files :
    None

Statistics creation :
    None

Statistics update :
month_stats:
   top_pages =>
       uri

Statistics deletion :
    None

plugins.pre_analysis.page_to_hit

Pre analysis hook
Change page into hit and hit into page into statistics

Plugin requirements :
    None

Conf values needed :
    page_to_hit_conf*
    hit_to_page_conf*

Output files :
    None

Statistics creation :
    None

Statistics update :
visits :
   remote_addr =>
       is_page

Statistics deletion :
    None

plugins.pre_analysis.robots

Pre analysis hook

Filter robots

Plugin requirements :
    None

Conf values needed :
    page_to_hit_conf*
    hit_to_page_conf*

Output files :
    None

Statistics creation :
    None

Statistics update :
visits :
   remote_addr =>
       robot

Statistics deletion :
    None