proxy_connect_timeout 5;
  proxy_read_timeout 60;
  proxy_send_timeout 5;
  proxy_buffer_size 16k;
  proxy_buffers 4 64k;
  proxy_busy_buffers_size 128k;
  proxy_temp_file_write_size 128k;
  proxy_temp_path /home/temp_dir;
  proxy_cache_path /home/cache levels=1:2 keys_zone=cache_one:200m inactive=1d max_size=10g;

location ~ .*\.(gif|jpg|png|htm|html|css|js|flv|ico|swf)(.*) {
      proxy_pass http://127.0.0.1:8000;//不缓存的直接访问后台服务器
      proxy_redirect off;
      proxy_set_header Host $host;
      proxy_cache cache_one;
      proxy_cache_valid 200 302 1h;
      proxy_cache_valid 301 1d;
      proxy_cache_valid any 1m;
      expires 30d;
}