Nginx no-www to www and www to no-www

Question

I am using nginx on Rackspace cloud following a tutorial and having searched the net and so far can\'t get this sorted.

I want www.mysite.com to go to mysite.com as

Answer 1

I combined the best of all the simple answers, without hard-coded domains.

301 permanent redirect from non-www to www (HTTP or HTTPS):

server {
    if ($host !~ ^www\.) {
        rewrite ^ $scheme://www.$host$request_uri permanent;
    }

    # Regular location configs...
}

If you prefer non-HTTPS, non-www to HTTPS, www redirect at the same time:

server {
    listen 80;

    if ($host !~ ^www\.) {
        rewrite ^ https://www.$host$request_uri permanent;
    }

    rewrite ^ https://$host$request_uri permanent;
}

Answer 2

If you are having trouble getting this working, you may need to add the IP address of your server. For example:

server {
listen XXX.XXX.XXX.XXX:80;
listen XXX.XXX.XXX.XXX:443 ssl;
ssl_certificate /var/www/example.com/web/ssl/example.com.crt;
ssl_certificate_key /var/www/example.com/web/ssl/example.com.key;
server_name www.example.com;
return 301 $scheme://example.com$request_uri;
}

where XXX.XXX.XXX.XXX is the IP address (obviously).

Note: ssl crt and key location must be defined to properly redirect https requests

Don't forget to restart nginx after making the changes:

service nginx restart

Answer 3

You may find out you want to use the same config for more domains.

Following snippet removes www before any domain:

if ($host ~* ^www\.(.*)$) {
    rewrite / $scheme://$1 permanent;
}

Answer 4

not sure if anyone notice it may be correct to return a 301 but browsers choke on it to doing

rewrite ^(.*)$ https://yoursite.com$1; 

is faster than:

return 301 $scheme://yoursite.com$request_uri;

Answer 5

Unique format:

server {
  listen 80;
  server_name "~^www\.(.*)$" ;
  return 301 https://$1$request_uri ;
}

Answer 6

If you don't want to hardcode the domain name, you can use this redirect block. The domain without the leading www is saved as variable $domain which can be reused in the redirect statement.

server {
    ...
    # Redirect www to non-www
    if ( $host ~ ^www\.(?<domain>.+) ) {
       rewrite ^/(.*)$ $scheme://$domain/$1;
    }
}

REF: Redirecting a subdomain with a regular expression in nginx