jwstanly / simple-analytics

A Cloudflare Worker to track analytics for Google Analytics and/or Cloudflare KV

Simple Analytics

A Cloudflare Worker to track online analytics. The Worker's URL serves an invisible 1x1 PNG, which tracks clients that load the image on web, email, mobile, etc.

Tracks:

• Location
• Time
• Cloudflare origin IP address
• A "source" parameter declared through the URL param

Integrates with:

1. Google Analytics - Forward events to GA4
2. Cloudflare KV - Persist events in a KV namespace

Setup:

1. Install Cloudflare's Wrangler CLI v2.0.0+ (more details). Run wrangler config to connect your Cloudflare account.
2. Rename wrangler.sample.toml file to wrangler.toml
3. [Optional] For Google Analytics, in wrangler.toml add your GA4 measurement id and API secret key (more details).
4. [Optional] For Cloudflare KV, create a KV namespace (more details). Then in wrangler.toml add your KV namespace id to bind your Worker to this namespace (more details).
5. Tweak the rest of wrangler.toml config as needed. You can change the Cloudflare project's name (appears in the public URL's subdomain), plus environment variables SOURCE_QUERY_PARAM (the URL query param name to specify source), PNG_BASE64 (the base64 encoded PNG to serve, by default a 1x1 transparent PNG), and GA4_EVENT_NAME (the event name for Google Analytics).
6. Run wrangler deploy in your terminal. Your Worker will now be live, any requests will be tracked.

Usage

Your Worker's URL follows this pattern. Optionally add the query parameter to track custom sources:

https://<PROJECT-NAME>.<CLOUDFLARE-USERNAME>.workers.dev/?<SOURCE_QUERY_PARAM>=<CUSTOM_SOURCE_HERE>

Use the URL as an image source on any platform, like HTML:

<img src="https://my-project.jwstanly.workers.dev/?s=custom-source-tracking-here">

For Google Analytics on the dashboard go to Reports -> Engagement -> Events. For KV on the Cloudflare dashboard go to Workers & Pages -> KV -> Tracking (View).