https rewrite for subdirectory only

[gunawan]

Hi,

I'm a noob.

How to rewrite http to https in /admin location only ?

I put something like this in nginx.conf :
location /admin {
     rewrite     ^(.*)   https://$server_name$1 permanent;
}

But I always get error message "The page isn't redirecting properly" in  
Firefox when I browse http://$server_name/admin

Thanks.

Best regards

Gunawan
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