Expose accepts() methods in the Request

[mcollina]

I think having some more accessors in the Request  might be pretty handy, as an example:

fastify.post('/', function (req, reply) {
  switch(req.type(['json', 'html'])) {
    case 'json':
      reply.type('application/json').send({hello: 'world'})
      break
    case 'html':
      reply.type('text/html').send('<b>hello, world!</b>')
      break
    default:
      reply.send(Boom.notAcceptable('unacceptable'))
      break
  }
})

[allevo]

Nice!

Should we cache the Accepts object for multiple queries on the sample Request instance?

[mcollina]

Yes. I would store it with a symbol.