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I've got two options (return and rewrite) for redirection and I'm not sure which one is recommenced (performance, SEO etc.):

## Redirect from non-www to www
server {
        server_name example.com;
        # Option 1
        return 301 $scheme://$host$request_uri;

        # Option 2
        rewrite ^ http://$host$request_uri? permanent;
    }

## Default server config

server {
        ...
        listen      192.168.1.1:80 default_server;
        root        /www;
        server_name www.example.com;

with option 2 I've noted that it seems to work with curl but it's not redirecting when called by a browser and the return code is that of a temporary redirect despite the rewrite directive being set to permanent:

 curl -I example.com
 HTTP/1.1 302 Moved Temporarily
 Server: nginx
 ...
 Location: http://www.example.com/
 ...
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1 Answer 1

up vote 5 down vote accepted

Your option 1:

return 301 $scheme://$host$request_uri;

Is exactly what you want.

Not sure why the rewrite ^ http://$host$request_uri? permanent; line would result in a 302 instead of 301. That's the proper syntax to force it to return a 301.

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1  
I had to add "listen" directive to the first server block. It works fine however when I try to access the admin backend (Wordpress - wp-admin) there is some kind of loop and I can't get into the login page. Any ideas? –  HTF Jul 12 '12 at 11:06
2  
That would probably be better dealt with in a separate question. Sounds like both your software (wordpress) and nginx are doing some redirecting, resulting in a loop. –  Gnarfoz Jul 12 '12 at 15:01
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