Astro on AWS with SST

We are going to create an Astro site, 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

---

1. Create a project

Let’s start by creating our project.

npm create astro@latest
cd aws-astro

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 an Astro project and create a sst.config.ts file in the root.

Start dev mode

Start the dev mode for your Astro site and link it to SST.

npm run dev

Note

You are starting astro dev wrapped in sst dev astro 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 Astro site.

sst.config.ts

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

---

3. Create an upload form

Add the upload form client in src/pages/index.astro. Replace the <Layout /> component with:

src/pages/index.astro

<Layout title="Astro x SST">
  <main>
    <form action={url}>
      <input name="file" type="file" accept="image/png, image/jpeg" />
      <button type="submit">Upload</button>
    </form>
    <script>
      const form = document.querySelector("form");
      form!.addEventListener("submit", async (e) => {
        e.preventDefault();

        const file = form!.file.files?.[0]!;

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

        window.location.href = image.url.split("?")[0] || "/";
      });
    </script>
  </main>
</Layout>

Add some styles, replace the <style /> tag with:

src/pages/index.astro

<style>
  main {
    margin: auto;
    padding: 1.5rem;
    max-width: 60ch;
  }
  form {
    color: white;
    padding: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #23262d;
    background-image: none;
    background-size: 400%;
    border-radius: 0.6rem;
    background-position: 100%;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  }
  button {
    appearance: none;
    border: 0;
    font-weight: 500;
    border-radius: 5px;
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    background-color: white;
    border: 1px solid rgb(var(--accent));
    color: rgb(var(--accent));
  }
  button:active:enabled {
    background-color: #EEE;
  }
</style>

---

4. Generate a pre-signed URL

When our app loads, we’ll generate a pre-signed URL for the file upload and use it in the form.

src/pages/index.astro

---
import { Resource } from "sst";
import Layout from '../layouts/Layout.astro';
import { getSignedUrl } from "@aws-sdk/s3-request-presigner";
import { S3Client, PutObjectCommand } from "@aws-sdk/client-s3";

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

Tip

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

And install the npm packages.

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

Head over to the local Astro site in your browser, http://localhost:4321 and try uploading an image. You should see it upload and then download the image.

---

5. Deploy your app

Now let’s deploy your app to AWS.

sst deploy

Congrats! Your site should now be live!

---

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.