normalize_url | Normalizing URLs like a boss | REST library

At Now when url is opened (without a slash - example.com/blog), a slash is automatically added at the end (there are 301 redirects). The question is, can I somehow do it so that the check first goes to see if the page exists (without a slash - example.com/blog). If so, open it. If not, then check whether the page exists with a slash (only without 301 - example.com/blog/). If so, then redirect 301, and if not, then throw 404.

Now just if there is no page (example.com/blog), then a slash is added to the end first (example.com/blog/), 301 redirects go and only then a 404 error is thrown. In this case, the 404 error must be thrown immediately, without a 301 redirect.

The dispatch was rewritten as follows.