Node.js

// ./cloud-functions/api/hello.js
export default function onRequest(context) {
  return new Response('Hello from Node.js!');
}

// ./cloud-functions/api/nodeinfo.js
import * as os from 'node:os'
import { randomUUID, createHash } from 'node:crypto'

export const onRequestGet = async ({ request }) => {
  const info = {
    nodeVersion: process.version,
    pid: process.pid,
    platform: os.platform(),
    url: request.url,
  }

  return new Response(JSON.stringify(info), {
    status: 200,
    headers: { 'Content-Type': 'application/json; charset=UTF-8' },
  })
}

// ./cloud-functions/express/[[default]].js
import express from "express";
const app = express();

// Add log middleware
app.use((req, res, next) => {
  console.log(`[${new Date().toISOString()}] ${req.method} ${req.url}`);
  next();
});

app.get("/", (req, res) => {
  res.json({ message: "Hello from Express on Node.js!" });
});

app.get("/users/:id", (req, res) => {
  const { id } = req.params;
  res.json({ userId: id, message: `Fetched user ${id}` });
});

// Export the express instance
export default app;

...
cloud-functions
├── index.js
├── hello-pages.js
├── helloworld.js
├── api
    ├── users
      ├── list.js
      ├── geo.js
      ├── [id].js
    ├── visit
      ├── index.js
    ├── [[default]].js
...

// ./cloud-functions/api/users/[id].js
export function onRequestGet(context) {
  return new Response(`User id is ${context.params.id}`);
}

cloud-functions 
└── express
    └── [[default]].js # express.js/koa.js entry point with built-in route definition

// ./cloud-functions/api/hello.js
export default function onRequest(context) {
  return new Response('Hello, world!', {
    headers: { 'Content-Type': 'text/plain' },
  });
}

// ./cloud-functions/api/users/index.js
export function onRequestGet(context) {
  return new Response(JSON.stringify({ users: [] }), {
    headers: { 'Content-Type': 'application/json' },
  });
}

export function onRequestPost(context) {
  return context.request.json().then(data => {
    return new Response(JSON.stringify({ message: 'Created', data }), {
      status: 201,
      headers: { 'Content-Type': 'application/json' },
    });
  });
}

export function onRequestDelete(context) {
  return new Response(null, { status: 204 });
}

// ./cloud-functions/api/search.js
export function onRequestGet(context) {
  const url = new URL(context.request.url);
  const name = url.searchParams.get('name') || 'Guest';

  return new Response(JSON.stringify({ hello: name }), {
    headers: { 'Content-Type': 'application/json' },
  });
}