Force lowercase paths using NGINX. Does not affect query params.

INSTALL

# On Ubuntu run `sudo apt-get install nginx-extras` for perl scripts to run 
# `sudo service nginx restart` (verify it restarted properly)
# Add nginx.conf perl function; add yoursite.conf location 

nginx.conf

# /etc/nginx/nginx.conf

http {
  
    # ...
    perl_set $uri_lowercase 'sub {
      my $r = shift;
      my $uri = $r->uri;
      $uri = lc($uri);
      return $uri;
    }';  

}

yoursite.conf

# /etc/nginx/sites-enabled/yoursite.conf

server {
    
    # ...

    location ~ [A-Z] {
        rewrite ^(.*)$ $scheme://$host$uri_lowercase;
    }    
    
    # ...
    
}