How do I save a big JSON payload into a file? Apparently, the pipe function cannot be applied to a HAPI request.

  file  = fs.createWriteStream(filepath);

  request.payload.pipe(file);

  file.on('error', function(err) {
    console.error(err);
  })

  readStream.on('end', function(err) {
    return reply.response('success').code(200);
  })