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Use Remix with SST

Create and deploy a Remix app to AWS with SST.


Prerequisites

You'll need at least Node.js 18 and npm 7. You also need to have an AWS account and AWS credentials configured locally.


1. Create a new app

Create a new Remix app.

npx create-remix@latest

Now initialize SST in your project root.

cd my-remix-app
npx create-sst@latest
Ready to deploy

Your Remix app is now ready to be deployed to AWS! Just run — npx sst deploy. But let's take a second to look at how SST makes it easy to add other features to your app.

Start your local dev environment.

npx sst dev

Start Remix

npm run dev
info

When running sst dev, SST does not deploy your Remix app. You are meant to run Remix locally.


2. Add file uploads

Let's add a file upload feature to our Remix app.


Add an S3 bucket

Add an S3 bucket to your sst.config.ts.

sst.config.ts
const bucket = new Bucket(stack, "public");

Bind it to your Remix app.

sst.config.ts
const site = new RemixSite(stack, "site", {
+ bind: [bucket],
});

Generate a presigned URL

To upload a file to S3 we'll generate a presigned URL. Add this to app/_index.tsx.

app/_index.tsx
export async function loader() {
const command = new PutObjectCommand({
ACL: "public-read",
Key: crypto.randomUUID(),
Bucket: Bucket.public.bucketName,
});
const url = await getSignedUrl(new S3Client({}), command);

return json({ url });
}

Add an upload form

Let's add the form. Replace the Index component in app/_index.tsx with.

app/_index.tsx
export default function Index() {
const data = useLoaderData<typeof loader>();
return (
<div>
<h1>Welcome to Remix</h1>
<form
onSubmit={async (e) => {
e.preventDefault();

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

const image = await fetch(data.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>
</div>
);
}

This will upload an image and redirect to it!


3. Add a cron job

Next, we'll add a cron job to remove the uploaded files every day. Add this to sst.config.ts.

sst.config.ts
new Cron(stack, "cron", {
schedule: "rate(1 day)",
job: {
function: {
bind: [bucket],
handler: "functions/delete.handler",
},
},
});

Just like our Remix app, we are letting our cron job access the S3 bucket.


Add a cron function

Add a function to functions/delete.ts that'll go through all the files in the bucket and remove them.

functions/delete.ts
export async function handler() {
const client = new S3Client({});

const list = await client.send(
new ListObjectsCommand({
Bucket: Bucket.public.bucketName,
})
);

await Promise.all(
(list.Contents || []).map((file) =>
client.send(
new DeleteObjectCommand({
Key: file.Key,
Bucket: Bucket.public.bucketName,
})
)
)
);
}

And that's it. We have a simple Remix app that uploads files to S3 and runs a cron job to delete them!


4. Deploy to prod

Let's end with deploying our app to production.

npx sst deploy --stage prod
info

View the source for this example on GitHub.


5. Manage in prod

You can use the SST Console to view logs and issues in prod. Create a free account and connect it to AWS.

Remix app in the SST Console


Next steps

  1. Learn more about SST
  2. Ready to dive into the details of SST? Check out our guide.