Nginx 域名转向从www 到裸域名

目的：把域名www.domain.com 转到domain.com 下面的两个代码可以实现

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

或

# Redirect www to non-www
server
{
    server_name ~^www\.(?P<domain>.+)$;
    rewrite ^ http://$domain$request_uri permanent;
}

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