EasyHost
Guides
Fastify
File uploads

Fastify file uploads with the MinIO JavaScript client

Let the browser upload straight to a free S3 compatible bucket, using a short-lived URL from your Fastify server. Your 512 MB container never holds the file.

Last updated November 9, 2026

Create the bucket

npx ezhst storage create files
npx ezhst storage info --json
npx ezhst env set S3_BUCKET=<bucket> S3_ACCESS_KEY_ID=<key> S3_SECRET_ACCESS_KEY=<secret>

Every file in the bucket is public by URL. Do not use it for private documents.

Create the client

npm i minio

src/s3.ts

import { Client } from "minio";

export const s3 = new Client({
  endPoint: "storage.easyhost.fun",
  useSSL: true,
  region: "us-east-1",
  pathStyle: true,
  accessKey: process.env.S3_ACCESS_KEY_ID!,
  secretKey: process.env.S3_SECRET_ACCESS_KEY!,
});

Pass the hostname without https:// as endPoint. The client uses path-style URLs when pathStyle is true.

Create the upload route

src/index.ts

import { s3 } from "./s3";
app.post("/api/uploads", async (request, reply) => {
  const key = `uploads/${crypto.randomUUID()}`;
  const url = await s3.presignedPutObject(process.env.S3_BUCKET!, key, 300);
  return { url, publicUrl: `https://storage.easyhost.fun/${process.env.S3_BUCKET}/${key}` };
});

Add your own authentication and file type checks here, because anyone who can reach this route can upload.

Upload from the browser

const { url, publicUrl } = await fetch("/api/uploads", { method: "POST" }).then((res) => res.json());
await fetch(url, { method: "PUT", body: file });

Deploy

npx ezhst redeploy

Local disk is lost on each deploy, which is why uploads belong in the bucket. See the Fastify hub for every Fastify guide, or free Fastify hosting for what is included. See also the storage product page.

Frequently asked questions

Does the bucket support private files?

No. Files are public by URL. Use long random keys only for low-risk content, and keep private data elsewhere.

Start for free

Install the skill, choose Global or Local, then tell your agent to deploy. No credit card, no config files.

npx ezhst skill install