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 normal in .htaccess for SEO and other reasons.

My /etc/nginx/sites-available/www.example.com.vhost config:

server {
       listen 80;
       server_name www.example.com example.com;
       root /var/www/www.example.com/web;

       if ($http_host != "www.example.com") {
                 rewrite ^ http://example.com$request_uri permanent;
       }

I have also tried

server {
       listen 80;
       server_name example.com;
       root /var/www/www.example.com/web;

       if ($http_host != "www.example.com") {
                 rewrite ^ http://example.com$request_uri permanent;
       }

I also tried. Both the second attempts give redirect loop errors.

if ($host = 'www.example.com' ) {
rewrite ^ http://example.com$uri permanent;
}

My DNS is setup as standard:

site.com 192.192.6.8 A type at 300 seconds
www.site.com 192.192.6.8 A type at 300 seconds

(example IPs and folders have been used for examples and to help people in future). I use Ubuntu 11.

Answer 1

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 2

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 3

try this

    if ($host !~* ^www\.){
        rewrite ^(.*)$ https://www.yoursite.com$1;
    }

Other way: Nginx no-www to www

server {
  listen       80;
  server_name  yoursite.com;
  root /path/;
  index index.php;
  return       301 https://www.yoursite.com$request_uri;
}

and www to no-www

server {
  listen       80;
  server_name  www.yoursite.com;
  root /path/;
  index index.php;
  return       301 https://yoursite.com$request_uri;
}

Answer 4

if ($host ~* ^www.example.com$) {
    return 301 $scheme://example.com$request_uri;
}

Answer 5

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 6

Here's how to do it for multiple www to no-www server names (I used this for subdomains):

server {
        server_name 
             "~^www\.(sub1.example.com)$"
             "~^www\.(sub2.example.com)$"
             "~^www\.(sub3.example.com)$";
         return 301 $scheme://$1$request_uri ;
}