NGINX redirect if user agent contains XYZ

Question

I have redirected my site from http to https. I want to allow the useragent XYZ and XYZ whatever to enter both http and https versions.

Now the vhost looks like this:

server {
        listen 80;
        server_name example.com www.example.com;
        rewrite  ^/(.*)$  https://www.example.com/$1 permanent;
}

How can I edit it, in order to allow agents that contain XYZ to see both HTTP and HTTPS? In order words... how to disable the redirect for such agents?

I tried

if ($http_user_agent ~* "^XYZ$") {
   rewrite ^/(.*)$ https://www.example.com/$1 permanent;
}

But this seems to redirect only XYZ. But I need to disable the redirect if XYZ, not strict XYZ, but containing XYZ...

Answer 1

With ~* you are attempting to loosely match the string, but your regex is ^XYZ$ which says match only if it starts with XYZ and only if it ends in XYZ. That's not loose at all. You are kind of contradicting yourself there.

See documentation here: http://nginx.org/en/docs/http/ngx_http_core_module.html#location

You probably want to adjust your regex to allow for more variations. From your question it's hard for us to know what you would like to match though. Possibly something like:

if ($http_user_agent ~* ".*XYZ.*") {
   rewrite ^/(.*)$ https://www.example.com/$1 permanent;
}