Next.js on AWS with SST

We are going to create a Next.js app, add an S3 Bucket for file uploads, and deploy it to AWS using SST.

View source

You can view the source of this example in our repo.

Before you get started:

1. Configure your AWS credentials
2. Install the SST CLI

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1. Create a project

Let’s start by creating our app.

npx create-next-app@latest
cd aws-nextjs

Init SST

Now let’s initialize SST in our app. Make sure you have the CLI installed.

sst init

This’ll detect that you are in a Next.js project and create a sst.config.ts file in the root.

Start dev mode

Start the dev mode for your Next.js app and link it to SST.

npm run dev

Note

You are starting next dev wrapped in sst dev next dev.

---

2. Add an S3 Bucket

Let’s add a public S3 Bucket for file uploads. Update your sst.config.ts.

sst.config.ts

const bucket = new sst.aws.Bucket("MyBucket", {
  public: true
});

Link the bucket

Now, link the bucket to our Next.js app.

sst.config.ts

new sst.aws.Nextjs("MyWeb", {
  link: [bucket]
});

---

3. Create an upload form

Add a form client component in components/form.tsx.

components/form.tsx

"use client";

import styles from "./form.module.css";

export default function Form({ url }: { url: string }) {
  return (
    <form
      className={styles.form}
      onSubmit={async (e) => {
        e.preventDefault();

        const file = (e.target as HTMLFormElement).file.files?.[0]!;

        const image = await fetch(url, {
          body: file,
          method: "PUT",
          headers: {
            "Content-Type": file.type,
            "Content-Disposition": `attachment; filename="${file.name}"`,
          },
        });

        window.location.href = image.url.split("?")[0];
      }}
    >
      <input name="file" type="file" accept="image/png, image/jpeg" />
      <button type="submit">Upload</button>
    </form>
  );
}

Add some styles.

components/form.module.css

.form {
  padding: 1rem;
  border-radius: var(--border-radius);
  background-color: rgba(var(--callout-rgb), 0.5);
  border: 1px solid rgba(var(--callout-border-rgb), 0.3);
}

.form input {
  margin-right: 1rem;
  font-family: var(--font-mono);
}

.form button {
  appearance: none;
  padding: 0.5rem 0.75rem;
  font-weight: 500;
  font-size: 0.875rem;
  border-radius: calc(1rem - var(--border-radius));
  background: linear-gradient(
    to bottom right,
    rgba(var(--tile-start-rgb), 1),
    rgba(var(--tile-end-rgb), 1)
  );
  border: 1px solid rgba(var(--callout-border-rgb), 1);
}

.form button:active:enabled {
  background: linear-gradient(
    to top left,
    rgba(var(--tile-start-rgb), 1),
    rgba(var(--tile-end-rgb), 1)
  );
}

---

4. Generate a pre-signed URL

When our app loads, we’ll generate a pre-signed URL for the file upload and render the form with it. Replace your Home component in app/page.tsx.

app/page.tsx

export default async function Home() {
  const command = new PutObjectCommand({
    Key: crypto.randomUUID(),
    Bucket: Resource.MyBucket.name,
  });
  const url = await getSignedUrl(new S3Client({}), command);

  return (
    <main className={styles.main}>
      <Form url={url} />
    </main>
  );
}

Tip

We are directly accessing our S3 bucket with Resource.MyBucket.name.

Add the relevant imports.

app/page.tsx

import { Resource } from "sst";
import Form from "@/components/form";
import { getSignedUrl } from "@aws-sdk/s3-request-presigner";
import { S3Client, PutObjectCommand } from "@aws-sdk/client-s3";

And install the npm packages.

npm install @aws-sdk/client-s3 @aws-sdk/s3-request-presigner

Head over to the local Next.js app in your browser, http://localhost:3000 and try uploading an image. You should see it upload and then download the image.

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5. Deploy your app

Now let’s deploy your app to AWS.

sst deploy

Congrats! Your app should now be live!

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Connect the console

As a next step, you can manage your app and view issues in the SST Console.

You can create a free account and connect it to your AWS account.