2022

@AtilaFassina

Day 3 — Data and Edge

@AtilaFassina

PREVIOUS

EPISODE

@AtilaFassina

route groups

with RootLayout

with grouped RootLayout

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route groups

with RootLayout

with grouped RootLayout

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EDGE

FUNCTIONS

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where?

🇩🇪  Server

🇺🇸  Edge

🇺🇸

Frankfurt

Northern California

San Diego

~5500mi

~9000Km
0~300mi

0~500Km

1.000Km roundtrip

20.000Km roundtrip

Client x Server

Client x Edge

@AtilaFassina

selecting

/**
 * @type {import('next').NextConfig}
 */
export default {
  experimental: {
    runtime: 'experimental-edge'
  }
 }

next.config.mjs

export const runtime = 'experimental-edge';

page.tsx

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↪

React Server Components

↪

Edge Functions

↪

Edge Runtime(s)

Winter Community Group

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choosing

node.js

edge

Cold Boot

IO

Latency

Code Size

npm Packages

~250ms

~0ms

All

fetch

Yes

Lower

50mb

1mb

All

Subset

Next.js documentation

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DATA

LAYER

@AtilaFassina

Serverless Databases

for the rescue

Pure RestAPI

Full-text Search

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Create Account

app.xata.io/signin

Install Global CLI 

(or run with npx)

volta install @xata.io/cli@latest

Connect Workspace

via VS Code

xata init

via CLI

@AtilaFassina

Note on Security

↪

Do not query the DB from the client-side

import 'server-only'

↪

Never share API tokens

add .env to .gitignore

✍️  Securely Querying Your Database

@AtilaFassina

Generating Types from Schema

↪

xata codegen -o {{path-to-file}}

↪

{
  "databaseURL": "https://atila-r3s7jg.xata.sh/db/smashing-next",
  "codegen": {
    "output": "lib/xata.codegen.server.ts"
  }
}

xata codegen

.xatarc

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Object-Relational Mapping

DB

schema

TS

types

SDK

queries

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Querying from Client-side

browser

API/Route

❓

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tRPC

browser

API/Route

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CRUD

Create

Read

Update

Delete

import 'server-only'
imnport { getXataClient } from './xata.codegen.server'

const xata = getXataClient()

/**
 * methods go here
**/

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AUTHENTICATION

AUTHORIZATION

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AUTHENTICATION

AUTHORIZATION

proving a user’s identity

giving a user ability to access a resource

@AtilaFassina

authentication

client-side

Auth Provider

email

password

user

jwt

email

password

App

External Service

header

payload

signature

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

JSON Web Token

@AtilaFassina

authorization

client-side

email

request

resource

jwt

App

Database

Row Level Security

server-side

request

request

resource

Restrict access to data based on Authorization

Day 3

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