[DB Auth] Generated auth handlers do not handle base64 encoded requests

[dac09]

What's the issue?

Originally reported by Jace on Discord. When the /login and /signup function handlers are deployed on vercel, it errors out with:

Expecting JSON error at char 0 'e'" 

Analysis

It seems this is because vercel base64 encodes incoming requests

Expected behaviour

The handlers should check if the event is base64 encoded, and decode it before continuing. (See example in comments)

[dac09]

Here's an example of one of my handlers where I was handling a base64 encoded event.

try {
    if (event.isBase64Encoded) {
      const stringBody = Buffer.from(body as string, 'base64').toString('ascii')
      parsedBody = querystring.parse(
        stringBody
      ) as unknown as PaddleSubscriptionHook
    } else {
      parsedBody = querystring.parse(
        body as string
      ) as unknown as PaddleSubscriptionHook
    }

Types included for reference ;) - but we may not need to use the querystring library

[dthyresson]

This is an example used in graphql.ts:

/**
 * Extracts and parses body payload from event with base64 encoding check
 *
 */
const parseEventBody = (event: APIGatewayProxyEvent) => {
  if (event.isBase64Encoded) {
    return JSON.parse(Buffer.from(event.body || '', 'base64').toString('utf-8'))
  } else {
    return event.body && JSON.parse(event.body)
  }
}