hapi.js add something to context every request

gistfile1.txt

    // Deal with errors
    server.ext('onPreResponse', function(request, reply) {
      var response = request.response;

      // Decorate with session
      if (!response.isBoom) {
        if (request.response.source && request.response.source.context) {
            request.response.source.context.session = {user: request.auth.credentials};
        }
        return reply();
      }

      // Replace error with friendly HTML

      var error = response;
      var ctx = {
        message: error
      };

      reply.view('error', ctx);
    });