Serverless Computing

A barcode within a photography^* is processed so that one gets its Nutri-Score from openfoodfacts.org (JSON API here…). For that, the following workflow is established:

1. Extract from photography computable data (i.e., barcode (as number)). Extraction relies on homemade image processing versus reuse of appropriate libraries (e.g., javascript-barcode-reader or QuaggaJS in JavaScript).
2. Compute checksum of barcode (here…) subject to extraction succeeded (correct format is 13 digits with checksum (4 in picture) at 13^th position).
3. Retrieve Nutri-Score from openfoodfacts.org by means of barcode (as number) provided that checksum is correct.

^*JavaScript WebRTC technology allows the management of a Web camera within a browser in order to take a photography (example here…).

Download Better_Food.Cloudflare.ts.zip 

Installation of technologies requires various Operating System (OS) utilities.

• macOS: brew -v;brew upgrade
• Windows PowerShell
  • choco -v;choco upgrade chocolatey (as administrator)
  • winget -v;winget upgrade

Principles

• Cloudflare workers provide an environment to create self-contained (business) functions without taking care of the computing infrastructure, application server(s) typically; these functions are by definition “serverless” (Serverless Computing with Cloudflare workers here…).
• Connection here… (login: contact@barbierdarnal.com)
• A worker named better_food would be deployed to: https://better_food.barbierdarnal.workers.dev

How to

• Usage relies on the wrangler Command Line Interface (CLI) guide… and commands…
• Simple use case (JavaScript ) here…
• TypeScript issues here…

General process

wrangler login

wrangler whoami

wrangler dev
# Alternative: 'wrangler dev ./ts/index.ts'

wrangler publish
# Alternative: 'wrangler publish ./ts/index.ts --name better_food'

Access: https://better_food.barbierdarnal.workers.dev

wrangler delete

• Usage relies on the wrangler Command Line Interface (CLI) here…
• Simple use case here…
• Develop Cloudflare workers with TypeScript here…

Orchestration

• Service bindings here… (contact@barbierdarnal.com)
• WebAssembly/WASI here…

https://www.cncf.io/blog/2021/08/25/webassembly-serverless-functions-in-aws-lambda/

WebAssembly serverless functions in AWS Lambda here…

Serverless browser automation with AWS Lambda and Puppeteer here…

Serverless Puppeteer on AWS here…

https://vercel.com/docs/concepts/functions/serverless-functions/quickstart https://vercel.com/docs/concepts/functions/serverless-functions/runtimes/node-js https://www.secondstate.io/articles/vercel-wasmedge-webassembly-rust/

WebAssembly serverless functions in AWS Lambda here…

Serverless browser automation with AWS Lambda and Puppeteer here…

Serverless Puppeteer on AWS here…