Nginx Remove WWW And Respond To Both - nginx

Question

I have the following nginx configuration fragment:
server {
listen 80;
server_name mydomain.io;
root /srv/www/domains/mydomain.io;
index index.html index.php;
access_log /var/log/nginx/domains/mydomain.io/access.log;
error_log /var/log/nginx/domains/mydomain.io/error.log;
location ~\.php {
try_files $uri =404;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_intercept_errors on;
fastcgi_pass 127.0.0.1:9000;
include /etc/nginx/fastcgi_params;
}
}
First, how can I make the server block respond to both http://www.mydomain.io and also http://mydomain.io. Second, I want to force if they come from http://www.mydomain.io to redirect to http://mydomain.io.
Thanks.

Answer 1

According to https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/#server-name-if, you should use:
server {
server_name www.example.com;
return 301 $scheme://example.com$request_uri;
}
server {
server_name example.com;
# [...]
}

Answer 2

I believe it's better to add two seperate server blocks to avoid unnecessary checking by the if block. I also use the $scheme variable so that HTTPS requests will not be redirected to their insecure counterparts.
server {
listen 80;
server_name www.mydomain.io;
rewrite ^ $scheme://mydomain.io$uri permanent;
}
server {
listen 80;
server_name mydomain.io;
# your normal server block definitions here
}

Answer 3

For a generic approach, without having to mention any specific domain or protocol, I have used this quite successfully:
# rewrite to remove www.
if ( $host ~ ^www\.(.+)$ ) {
set $without_www $1;
rewrite ^ $scheme://$without_www$uri permanent;
}
This will redirect: https://www.api.example.com/person/123?q=45
to https://api.example.com/person/123?q=45

Answer 4

Another way to code it :
if ($http_host ~* "^www\.(.+)$"){
rewrite ^(.*)$ http://%1$request_uri redirect;
}
It works even with multiple domain names on the same code.

Answer 5

server {
listen 80;
server_name www.mydomain.io;
return 301 https://$host$request_uri;
}
server {
listen 80;
server_name mydomain.io;
...
}

Answer 6

On the first question - simply add both domains:
server_name mydomain.io www.mydomain.io;
For the second, you'll need this simple redirect:
server {
listen 80;
server_name www.mydomain.io mydomain.io;
if ($host = 'www.mydomain.io' ) {
rewrite ^/(.*)$ http://mydomain.io/$1 permanent;
}