Nginx配置同时访问http和https

server {
  listen 80 default backlog=2048;
  listen 443;
  server_name lcto.com;
  root /var/lcto/html;
  ssl on;
  ssl_certificate   /usr/local/Tengine/sslcrt/lcto.crt;
  ssl_certificate_key /usr/local/Tengine/sslcrt/lcto.key;
}

400 Bad Request
The plain HTTP requset was sent to HTTPS port. Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

server {
  listen 80 default backlog=2048;
  listen 443 ssl;
  server_name lcto.com;
  root /var/lcto/html;
  ssl_certificate   /usr/local/Tengine/sslcrt/lcto.crt;
  ssl_certificate_key /usr/local/Tengine/sslcrt/lcto.key;
}