Nginx 实现反向代理域名不变访问返回内容改变

模拟站点 http://www.bdkyr.com/
http 代理 http

# server config
server {
    listen       80;
    server_name  a.myblog.com;
    proxy_set_header       Host $host;
    proxy_set_header  X-Real-IP  $remote_addr;
    proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
    root html/myblog;
    expires -1;
    location / {
        proxy_set_header Host www.bdkyr.com;
        proxy_pass http://www.bdkyr.com/;
    }
}