if condition concatenation in nginx conf file

Question

I'm trying to do this in a nginx conf file but it doesn't work :

if ($scheme://$host = 'http://example.com') {
  return 301 https://example.com$request_uri;
}

So how can I concatenate $scheme and $host in the if condition ?

Answer 1

It's easy with a temp variable

set $tmp $scheme://$host;
if ($tmp = 'http://example.com') {
    return 301 https://example.com$request_uri;
}