Serverless Computing



Use case: Better Food

A barcode within a photography* is processed so that one gets its Nutri-Score from openfoodfacts.org (JSON API ☛). 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., or QuaggaJS in JavaScript).
  2. Compute checksum of barcode ☛ subject to extraction succeeded (correct format is 13 digits with checksum (4 in picture) at 13th 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 ☛).

Download Better_Food.Cloudflare.ts.zip 

Cloudflare workers

Principles

How to

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
Cloudflare workers

Orchestration

Amazon Lambda
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…

VERCEL Lambda
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…