Nginx http80，https443共存

server
{
    listen 80;
    listen 443 ssl;
    server_name www.baidu.com;
    index index.html index.htm index.php;
    root /home/wwwroot/www.baidu.com/;
    #ssl on; 这里要注释掉
    ssl_certificate /usr/local/nginx/conf/ssl/www_baidu_com.crt;
    ssl_certificate_key /usr/local/nginx/conf/ssl/www_baidu_com.key;
    # 自动跳转到https
    if ($ssl_protocol = "") { return 302 https://$host$request_uri; }
    #以下配置省略...
}