Serverless with Cloudflare

What is serverless computing?

On demand server for computing. It is an abstraction relevant to application development and not consumption. An application is a software service that executes whenever a user needs it. Application could wait for a user request and keep on standby (server) or it could leave the instruction with another application (serverless platform) to make it available whenever a user request comes. Serverless computing is clearly not the answer to every application need but it makes sense for a lot of use cases.

Cloudflare Workers

A very basic example using cloudflare worker. The worker code adds an event handler for fetch and returns a string ‘hello world!’ for all requests.

addEventListener("fetch", (event) => {
  event.respondWith(handleRequest(event.request));
});

async function handleRequest(request) {
  return new Response("Hello world");
}

Cloudflare Workers is a serverless application platform. The examples above are the application and the instruction for on demand execution is handled by the cloudflare platform.

https://my-worker.makeall.workers.dev/

Wrangler Setup

Cloudflare provides an application development tool to develop and test serverless applications.

npm install -g @cloudflare/wrangler
wrangler --version

wrangler login
# Open Browser
# Login and get API Token
# Config file at
/home/ranu/.wrangler/config/default.toml

New Project

wrangler generate my-worker

#edit wrangler.toml

# dev test
wrangler dev

# publish live
wrangler publish