Override Sinatra default NotFound error page

Question

Is there a way to override the sinatra default NotFound error page (\"Sinatra doesnt know this ditty\")? I want sinatra to show only a plain string as \"Method not found\" when

Answer 1

Perhaps a more graceful solution than that proposed in the accepted answer is to rescue only Sinatra::NotFound, rather than using the error(404) or not_found styles.

error Sinatra::NotFound do
  content_type 'text/plain'
  [404, 'Not Found']
end

This prevents the "sinatra doesn't know this ditty" default page for routes that you haven't defined, but doesn't get in the way of explicit return [404, 'Something else']-style responses.