How to get around Nextjs 4.5 mb payload size limit

[aquaductape]

Vercel has the maximum payload size for the request body or the response body of a Serverless Function is 4.5 MB.

So anytime this function is serving a file larger than 4.5 MB, I get 413: FUNCTION_PAYLOAD_TOO_LARGE error.

Is there any way to work around this using got

import got from 'got'

const handler = async (req, res) => {
  if (req.method.toUpperCase() !== 'GET') return res.status(500).json({});

  const content_id = req.query.id;
  const file = await myDataBase.getFile(content_id)

  const { url, original_filename, original_file_url } = file.meta;

  try {
    got.stream(original_file_url).pipe(res);
  } catch (error) {
    return res.status(500).send(null);
  }

};

export default handler;

[sindresorhus]

The limit is a Vercel serverless function limitation that applies to both requests and responses. Unfortunately, using got.stream().pipe(res) doesn't bypass this limit on Vercel, even though you're streaming.

your options:

Redirect to the file directly (simplest):

Instead of proxying the file through your serverless function, redirect the client to the original URL:

const handler = async (req, res) => {
	const content_id = req.query.id;
	const file = await myDataBase.getFile(content_id);
	const {original_file_url} = file.meta;
	
	// Redirect to the original file
	res.redirect(302, original_file_url);
};

Use pre-signed URLs:

If you need access control, generate a pre-signed URL from your storage provider (S3, Vercel Blob, etc.) and redirect to it:

const handler = async (req, res) => {
	const content_id = req.query.id;
	const file = await myDataBase.getFile(content_id);
	
	// Generate pre-signed URL with expiration
	const signedUrl = await generatePresignedUrl(file.url, { expiresIn: 3600 });
	
	res.redirect(302, signedUrl);
};