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THE EDGE AT YOUR FINGERTIPS, LITERALLY! COMMS API Meetup Lagos, Oct 2022

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WHAT WE'LL COVER? @lauragift_

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WHAT WE'LL COVER? •What is the Edge? @lauragift_

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WHAT WE'LL COVER? •What is the Edge? •How is it different from Serverless Functions? @lauragift_

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WHAT WE'LL COVER? •What is the Edge? •How is it different from Serverless Functions? •Pros & Cons of Serverless & Edge functions. @lauragift_

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WHAT WE'LL COVER? •What is the Edge? •How is it different from Serverless Functions? •Pros & Cons of Serverless & Edge functions. •The Cloudflare Developer Ecosystem. @lauragift_

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WHAT WE'LL COVER? •What is the Edge? •How is it different from Serverless Functions? •Pros & Cons of Serverless & Edge functions. •The Cloudflare Developer Ecosystem. •Use Cases and Examples. @lauragift_

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GIFT EGWUENU DEVELOPER ADVOCATE @CLOUDFLARE EDUCATOR & YOUTUBER @LAURAGIFT_

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WHAT IS THE Edge? @lauragift_

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The edge is a server geographica y located close to your users. @lauragift_

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Where it a started... @lauragift_

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LIMITATIONS OF TRADITIONAL SERVERS @lauragift_

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LIMITATIONS OF TRADITIONAL SERVERS •Expensive to maintain. @lauragift_

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LIMITATIONS OF TRADITIONAL SERVERS •Expensive to maintain. •High latency due to large amount of traffic. @lauragift_

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LIMITATIONS OF TRADITIONAL SERVERS •Expensive to maintain. •High latency due to large amount of traffic. •Limited opportunity for scaling. @lauragift_

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SERVERLESS FUNCTIONS @lauragift_

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Serverless doesn't mean no servers! There's still a server, you just don't manage it. @lauragift_

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SERVERLESS PROVIDERS @lauragift_

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ADVANTAGES OF SERVERLESS FUNCTIONS @lauragift_

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ADVANTAGES OF SERVERLESS FUNCTIONS •Hosted by a provider, no need to manage your servers. @lauragift_

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ADVANTAGES OF SERVERLESS FUNCTIONS •Hosted by a provider, no need to manage your servers. •Low costs of bandwidth (pay for only what you use). @lauragift_

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ADVANTAGES OF SERVERLESS FUNCTIONS •Hosted by a provider, no need to manage your servers. •Low costs of bandwidth (pay for only what you use). •Scalibility On Demand. @lauragift_

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LIMITATION OF SERVERLESS FUNCTIONS @lauragift_

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LIMITATION OF SERVERLESS FUNCTIONS •All functions are stored in a centralized core location (us-east1). @lauragift_

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LIMITATION OF SERVERLESS FUNCTIONS •All functions are stored in a centralized core location (us-east1). •Cold start after the function is idle. @lauragift_

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LIMITATION OF SERVERLESS FUNCTIONS •All functions are stored in a centralized core location (us-east1). •Cold start after the function is idle. •Limited execution time(10ms). @lauragift_

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EDGE FUNCTIONS @lauragift_

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EDGE FUNCTIONS = Serverle Functions at The Edge @lauragift_

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REGION EARTH

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EDGE PROVIDERS Cloudflare Workers AWS Lambda@Edge Deno Deploy Netlify Edge Functions

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ADVANTAGES OF EDGE FUNCTIONS @lauragift_

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ADVANTAGES OF EDGE FUNCTIONS •Reduced Latency @lauragift_

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ADVANTAGES OF EDGE FUNCTIONS •Reduced Latency •Zero Cold Start (0ms) @lauragift_

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ADVANTAGES OF EDGE FUNCTIONS •Reduced Latency •Zero Cold Start (0ms) •Improved Application Performance @lauragift_

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LIMITATIONS OF EDGE FUNCTIONS

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@lauragift_

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•Limited compute resources (~10 ms). @lauragift_

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@lauragift_

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•No support for browser or Node.js specific features(V8 Engine). @lauragift_

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The best packages and libraries supported by Cloudflare Workers.

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@lauragift_

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•High latency due to data storage limitations. @lauragift_

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CLOUDFLARE DEVELOPER PLATFORM @lauragift_

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CLOUDFLARE WORKERS @lauragift_

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Cloudflare Workers is a serverless execution environment that allows you to create new applications or augment existing ones without configuring or maintaining infrastructure.

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@lauragift_

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▸ Say goodbye to cold starts—support for 0ms worldwide. @lauragift_

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How is a zero cold start possible?

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How is a zero cold start possible?

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@lauragift_

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▸ V8 Isolates Engine @lauragift_

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VIRTUAL MACHINES V8 ISOLATES A virtual machine (VM) is a software-based computer that exists within another computer’s operating system. Isolates are lightweight contexts that group variables with the code allowed to mutate them. Consumes more memory. Consumes less memory. Start-up time 500ms- 10secs. Start-up time under 5ms.

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@lauragift_

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▸ Cost Savings - 100,000 request/daily free & affordable plans to scale. @lauragift_

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@lauragift_

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▸ Edge Storage with KV, Durable Object, R2 & D1. @lauragift_

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HELLO WORKER EXAMPLE export default { fetch() { return new Response('Hello Worker!'); }, }; @lauragift_

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COMMON USE CASES OF EDGE FUNCTIONS @lauragift_

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COMMON USE CASES OF EDGE FUNCTIONS •Geolocation Based Redirects @lauragift_

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COMMON USE CASES OF EDGE FUNCTIONS •Geolocation Based Redirects •A/B Testing @lauragift_

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COMMON USE CASES OF EDGE FUNCTIONS •Geolocation Based Redirects •A/B Testing •Custom HTTP Headers & Cookie Management @lauragift_

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COMMON USE CASES OF EDGE FUNCTIONS •Geolocation Based Redirects •A/B Testing •Custom HTTP Headers & Cookie Management •User Authentication and Authourization @lauragift_

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COMMON USE CASES OF EDGE FUNCTIONS •Geolocation Based Redirects •A/B Testing •Custom HTTP Headers & Cookie Management •User Authentication and Authourization •Localization and Personalization @lauragift_

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@lauragift_

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DATA STORAGE ON THE EDGE @lauragift_

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WORKERS KV @lauragift_

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Workers KV is a global, low-latency, key-value data store.

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await NAMESPACE.put(key, value); @lauragift_

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await NAMESPACE.get(key); @lauragift_

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await NAMESPACE.delete(key); @lauragift_

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await NAMESPACE.list(); @lauragift_

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R2 @lauragift_

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R2 storage allows developers to store large amounts of unstructured data without the costly egre bandwidth f s associated with typical cloud storage services. @lauragift_

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R2 BINDINGS # wrangler.toml [[r2_buckets]] binding = 'MY_BUCKET' # <~ valid JavaScript variable name bucket_name = '' @lauragift_

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D1 @lauragift_

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export default { async fetch(request, env, ctx) { const { pathname } = new URL(request.url) if (pathname === '/num-products') { const { result } = await env.DB.get(`SELECT count(*) AS num_products FROM Product;`) return new Response(`There are ${result.num_products} products in the D1 database!`) } } } @lauragift_

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export default { async fetch(request, env, ctx) { const { pathname } = new URL(request.url) if (pathname === '/num-products') { const { result } = await env.DB.get(`SELECT count(*) AS num_products FROM Product;`) return new Response(`There are ${result.num_products} products in the D1 database!`) } } } @lauragift_

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WHEN not TO USE CLOUDFLARE WORKERS

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@lauragift_

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USE CASES WONT RECOMMEND Data Latency - Database is not hosted on the Edge! @lauragift_

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USE CASES WONT RECOMMEND Requires large amount of compute resources to run. @lauragift_

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Workers Examples @lauragift_

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GEOLOCATION BASED REDIRECTS export default { async fetch(request: Request): Promise { const { cf } = request if ( cf?.country === "NL") { return Response.redirect("https://asos.com/nl") } }, }; @lauragift_

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GEOLOCATION BASED REDIRECTS export default { async fetch(request: Request): Promise { const { cf } = request if ( cf?.country === "NL") { return Response.redirect("https://asos.com/nl") } }, }; @lauragift_

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GEOLOCATION BASED REDIRECTS export default { async fetch(request: Request): Promise { const { cf } = request if ( cf?.country === "NL") { return Response.redirect("https://asos.com/nl") } }, }; @lauragift_

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GEOLOCATION BASED REDIRECTS export default { async fetch(request: Request): Promise { const { cf } = request if ( cf?.country === "NL") { return Response.redirect("https://asos.com/nl") } }, }; @lauragift_

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GEOLOCATION BASED REDIRECTS export default { async fetch(request: Request): Promise { const { cf } = request if ( cf?.country === "NL") { return Response.redirect("https://cloudflare.com") } }, };

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RETRY/LOG FAILED REQUESTS export default { async fetch(request: Request): Promise { const res = await fetch("https://httpstat.us/503?sleep=2000") if (!res.ok) { return await fetch("https://httpstat.us/200") } else { return res } } } @lauragift_

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RETRY/LOG FAILED REQUESTS export default { async fetch(request: Request): Promise { const res = await fetch("https://httpstat.us/503?sleep=2000") if (!res.ok) { return await fetch("https://httpstat.us/200") } else { return res } } } @lauragift_

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RETRY/LOG FAILED REQUESTS export default { async fetch(request: Request): Promise { const res = await fetch("https://httpstat.us/503?sleep=2000") if (!res.ok) { return await fetch("https://httpstat.us/200") } else { return res } } } @lauragift_

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RETRY/LOG FAILED REQUESTS export default { async fetch(request: Request): Promise { const res = await fetch("https://httpstat.us/503?sleep=2000") if (!res.ok) { return await fetch("https://httpstat.us/200") } else { return res } } }

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A/B TESTING REMOTE ORIGINS export default { async fetch(request: Request): Promise { const origin1 = 'https://cloudflare.com'; const origin2 = 'https://jsworldconference.com'; const randomNumber = Math.floor(Math.random() * 100) + 1; if (randomNumber > 50) { return fetch(origin1); } else { return fetch(origin2); } }, }; @lauragift_

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A/B TESTING REMOTE ORIGINS export default { async fetch(request: Request): Promise { const origin1 = 'https://cloudflare.com'; const origin2 = 'https://jsworldconference.com'; const randomNumber = Math.floor(Math.random() * 100) + 1; if (randomNumber > 50) { return fetch(origin1); } else { return fetch(origin2); } }, }; @lauragift_

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A/B TESTING REMOTE ORIGINS export default { async fetch(request: Request): Promise { const origin1 = 'https://cloudflare.com'; const origin2 = 'https://jsworldconference.com'; const randomNumber = Math.floor(Math.random() * 100) + 1; if (randomNumber > 50) { return fetch(origin1); } else { return fetch(origin2); } }, }; @lauragift_

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A/B TESTING REMOTE ORIGINS export default { async fetch(request: Request): Promise { const origin1 = 'https://cloudflare.com'; const origin2 = 'https://jsworldconference.com'; const randomNumber = Math.floor(Math.random() * 100) + 1; if (randomNumber > 50) { return fetch(origin1); } else { return fetch(origin2); } }, }; @lauragift_

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A/B TESTING REMOTE ORIGINS export default { async fetch(request: Request): Promise { const origin1 = 'https://cloudflare.com'; const origin2 = 'https://jsworldconference.com'; const randomNumber = Math.floor(Math.random() * 100) + 1; if (randomNumber > 50) { return fetch(origin1); } else { return fetch(origin2); } }, }; @lauragift_

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A/B TESTING REMOTE ORIGINS export default { async fetch(request: Request): Promise { const origin1 = 'https://cloudflare.com'; const origin2 = 'https://jsworldconference.com'; const randomNumber = Math.floor(Math.random() * 100) + 1; if (randomNumber > 50) { return fetch(origin1); } else { return fetch(origin2); } }, };

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WHAT WE'VE LEARNED TODAY? @lauragift_

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WHAT WE'VE LEARNED TODAY? •What is the Edge? @lauragift_

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WHAT WE'VE LEARNED TODAY? •What is the Edge? •How is it different from Serverless Functions? @lauragift_

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WHAT WE'VE LEARNED TODAY? •What is the Edge? •How is it different from Serverless Functions? •Pros & Cons of Serverless & Edge functions. @lauragift_

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WHAT WE'VE LEARNED TODAY? •What is the Edge? •How is it different from Serverless Functions? •Pros & Cons of Serverless & Edge functions. •The Cloudflare Developer Ecosystem (Workers, KV, R2, DO, D1). @lauragift_

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WHAT WE'VE LEARNED TODAY? •What is the Edge? •How is it different from Serverless Functions? •Pros & Cons of Serverless & Edge functions. •The Cloudflare Developer Ecosystem (Workers, KV, R2, DO, D1). •Use Cases & Examples of Edge Functions. @lauragift_

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Building applications on the Edge helps bring us close to our end-users, improving their experience and making the web more acce ible to everyone. @lauragift_

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FURTHER RESOURCES

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FURTHER RESOURCES • Cloudflare Workers Documentation

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FURTHER RESOURCES • Cloudflare Workers Documentation • Cloudflare Pages Documentation

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FURTHER RESOURCES • Cloudflare Workers Documentation • Cloudflare Pages Documentation • Cloudflare Blog - blog.cloudflare.com

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FURTHER RESOURCES • Cloudflare Workers Documentation • Cloudflare Pages Documentation • Cloudflare Blog - blog.cloudflare.com • Cloudflare Devs Discord

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THANK YOU! @lauragift_