Cloudflare Workers

Cloudflare Workers scripts are Javascript programs that can be run on Cloudflare's edge server, all 120 of them. They are modeled based on Service Workers API and is currently in open beta.

Workers Zoo

This repo is just a collection of my workers when playing with it Cloudflare Workers:

• http_prober - An implementation of Prometheus's blackbox-exporter HTTP probe.

  $ curl 'thisisbinh.me/worker/http_prober?module=http_get_2xx&target=http://example.com/'
  probe_success 0
  probe_duration_seconds 0.694
  probe_http_status_code 200
  probe_http_redirected 1
  probe_http_content_length -1
  

This potentially can be used to monitor availability / performance of your origin server from Cloudflare point of view.

• proxy - Using worker as a HTTP proxy for other websites, e.g. https://thisisbinh.me/worker/proxy/github.com/lebinh

• echo - Debugging / testing script that just echo back the request/response from worker point of view.

  $ curl thisisbinh.me/worker/echo/request/headers
  accept: */*
  accept-encoding: gzip
  cf-connecting-ip: 139.59.112.58
  cf-force-miss-ts: 0
  cf-ipcountry: IN
  cf-ray: 3e94c829a18d17b0
  cf-visitor: {"scheme":"http"}
  connection: Keep-Alive
  host: thisisbinh.me
  user-agent: curl/7.52.1
  x-forwarded-proto: http
  x-real-ip: 139.59.112.58
  

Playing with it

You will need TypeScript compiler to compile the sources. You can install it and other dependencies with

npm install

To build the Workers Javascript files from TypeScript sources:

$ make

To run test:

$ make test

To deploy all scripts to your Cloudflare account:

$ export CF_AUTH_EMAIL=your@email
$ export CF_AUTH_KEY=your_cloudflare_api_key
$ make deploy