function versioning(paths) {
  let versions = Object.keys(paths);
  let defaultPath = versions[0];

  return function(request, reply) {
    if (versions.contains(request.headers['accept-header'])) {
      return paths[request.headers['accept-header']](request, reply);
    }
    return paths[defaultPath](request, reply);
  }
}

server.route({
  method: 'GET',
  path: '/test',
  handler: versioning({
    '1.0': Version1,
    '2.0': Vervsion2
  })
});

function Version1(request, reply) {
}

function Version2(request, reply) {
}
}