#route-handler code explainers

javascript

import { NextResponse } from 'next/server';
import { db } from '@/lib/db';
 
function csvCell(value) {

Streaming a CSV export in a Next.js route

streaming csv readablestream

Advanced 9 steps

javascript

import { NextResponse } from 'next/server';
import { createWriteStream } from 'node:fs';
import { mkdir } from 'node:fs/promises';
import { pipeline } from 'node:stream/promises';

Streaming file uploads in a Next.js route

file-upload streams validation

Intermediate 9 steps

javascript

import { NextResponse } from 'next/server'
 
const UPSTREAM = 'https://api.exchangerate.host/latest'

A cached exchange-rate proxy in Next.js

route-handler caching revalidation

Intermediate 7 steps