Nginx-从http：//正确重定向到https：//而不带www

Question

Following my configuration file:

server {
   listen [::]:443 ipv6only=off ssl;
   server_name www.example.com;
   // ssl stuff
   return 301 https://example.com$request_uri;
}

server {
   listen  [::]:80 ipv6only=off;
   return 301 https://example.com$request_uri;
}

server {
   listen [::]:443 ssl;  
   server_name example.com;
   // php and ssl stuff
}

I don't understand why http://www.example.com redirects to https://www.example.com and then to https://example.com . How to redirect from http://www.example.com directly to https://example.com ?

Answer 1

NGINX config for redirect from HTTP to HTTPS without WWW:

server {
   listen 80 default_server;
   listen  [::]:80 default_server;
   server_name example.com www.example.com;
   return 301 https://example.com$request_uri;
}
server {
   listen 443 default_server;
   listen [::]:443 ssl http2 default_server;
   server_name example.com www.example.com;
   ##here-ssl-settings##
   return 301 https://example.com$request_uri;
}

Answer 2

启用HSTS后，第一次重定向将直接由您的浏览器完成，而无需任何网络交互。