sub (/) { redispatch_to '/index' },
sub (/:article) { [200, ['Content-Type' => 'text/html'], [render_article $_{article}, 'en']] }
sub (/) { redispatch_to '/index' },
sub (/:article) { [200, ['Content-Type' => 'text/html'], [render_article $_{article}, 'en']] }