get '/titles' => sub ($c) {
    $c->render_later;
    my $tx = $c->tx;
    my @promises = map { $ua->get_p($_) } @urls;
    Mojo::Promise->all(@promises)->then(sub {
        my @results = @_;
        my $titles = [];
        foreach my $result (@results) {
            my $tx = $result->[0];
            my $title = trim($tx->res->dom->at('title')->text);
            my $status = $tx->res->is_success ? 'Connected' : $tx->error->{message};
            push @$titles, {host => $tx->req->url->host, status => $status, title => $title};
        }
        $c->render(titles => $titles);
    })->catch(sub { $c->reply->exception(pop); undef $tx });
} => 'titles';