How to compose rewrite nginx?

Question

Nginx

Hello,
there is a domain and a site with a forum on it:
http://site.ru/forum/viewforum.php?f=4
it is moving to a new domain, and the forum has moved to the root
http://newsite.ru/viewforum.php?f=4
How to rewrite? Help me please.

Answer 1

On the old domain do ^

location ~ ^/forum/(.*)$ {
  return 301 http://newsite.ru/$1$is_args$args;
}