How to increase body size in requests Svelte

Question

I am making some request that exceeds the limit of svelte of 512kb, I have checked this page on svelte docs https://kit.svelte.dev/docs/adapter-node#environment-variables-body-size-limit, it says that i have to set something to 0 and implement a custom check, and i am using adapter-vercel(because i have tried that env method didn't worked), idk how to do it, can someone help me with this?

Answer 1

Change body size limit

To remove the limit, locally, add this to a .env file at the root of your project:

BODY_SIZE_LIMIT=0

And in Vercel, add an environment variable with the same name and value.

Note that you can also set it to a custom value in kiliobytes:

BODY_SIZE_LIMIT=1024 # 1mb

Custom check

Then you'd need to create a src/hooks.server.js file with a handle method that looks at the request body and rejects it if too large. Here is an example from Rich Harris:

export function handle({ event, resolve }) {
  const length = +(event.request.headers.get('content-length') ?? '0');
  if (length > MAX_SIZE) {
    throw error(413);
  }

  return resolve(event);
}

Where MAX_SIZE matches an environment variable you set.

Related post: How to increase request size made to api/+server.js