README

Introduction

This module enables basic analytics in Silverstripe without saving identifying data.

Requirements

silverstripe/framework ^5
silverstripe/admin ^2

For Silverstripe 4, check out version/branch 1.

Installation

composer require wakeworks/analytics

After a /dev/build, the module will start logging requests. You can find an overview of the data at /admin/analytics.

ATTENTION: Please read through "Garbage Collection" if you don't want your database to grow infinitely.

How does it work?

On every request, a user sends its User-Agent string to the server. Using a middleware and matomo/device-detector, we can parse it and check which browser/device it is or if it's a bot.
This information is stored in the database together with other collected analytics.
On first visit of a user, we write a note into the session to be able to mark it as unique.
In order to filter out as many bots as possible, we don't save any request with an unknown User-Agent. To optimize bot detection, use image verification.
Also, some routes are automatically skipped, e.g. UserDefinedFormController/ping, /admin/* or /dev/*, see "When is no information stored?".

Improve bot detection by using image verification

While removing unknown User-Agents already takes away a fair share of bots, there are still many crawlers that just call your website without loading its content.

In order to remove them from the statistics, you can insert an image tracking code by activating it with the following configuration.

WakeWorks\Analytics\Middlewares\AnalyticsProcessorMiddleware:
  image_verification: true

This method works by inserting a hidden <img> tag before </body> on every valid tracking request. If a user loads the image, the request will create an entry in the database, otherwise it won't.

Garbage Collection

After some time, your database will fill up with too many requests that you might not care about anymore (e.g. very old ones).

Use the task /dev/tasks/AnalyticsGarbageCollectionTask in order to delete them.

You should do this automatically, by using a cron job or, if that's not possible, by activating the Garbage Collection every xth request via the middleware.

WakeWorks\Analytics\Middlewares\AnalyticsProcessorMiddleware:
  # Run AnalyticsGarbageCollectionTask with probability of 1/100
  # => ~ every 100 requests. (Default: 0, off)
  gc_divisor: 100
  # Delete requests older than (default) 365 days.
  preserve_for_days: 365

Only do this if the amount of requests you collect is reasonably small, otherwise the DELETE query might take uncomfortably long for the visitor.

Extension for Subsites

If you have silverstripe/subsites installed and want to track by Subsite, you can simply enable the SubsiteExtension and everything will work out of the box.

WakeWorks\Analytics\Models\AnalyticsLog:
  extensions:
    - WakeWorks\Analytics\Extensions\SubsitesExtension

Which information is stored?

Current date
Requested url
Operating System with version
Browser with version
Device type (desktop, smartphone etc.)
Unique visit
SiteTreeID (PageID) if possible

When is no information stored?

Unidentifiable/Bot User-Agents
Status codes that are not between 200-204 due to bots spamming /wp-* etc.
Admin backend urls
Security urls / Controller
DevelopmentAdmin Controller (/dev urls)
UserDefinedFormController/ping

zazama / analytics

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