Right now, you can set the bodyLimit in two ways:

const app = Fastify({ bodyLimit: serverLimit })

app.post('/route-limit', {
  bodyLimit: routeLimit,
  handler (req) { return req.rawBody }
})

A custom ContentTypeParser or a preParsing hook function:

• can access the serverLimit via app.initialConfig.bodyLimit
• can't access the routeLimit unless a private API request.context._parserOptions.limit

I think we should add a getter request.routeBodyLimit that returns the custom routeLimit || serverLimit

WDYT?

Ref Eomm/fastify-raw-body#35