以下的配置处于，多域名匹配
http {

    map $host $proxy_pass{
		"mflm.0000221.pre2.hieap.cn" "43447";
		"jwjx.0000206.pre2.hieap.cn" "38889";
		"cpp.0000207.pre2.hieap.cn" "36639";
		"erp.0000212.pre2.hieap.cn" "46153";
		"dcp.0000220.pre2.hieap.cn" "33234";
		"cms.0000221.pre2.hieap.cn" "41274";
		"hccd.0000221.pre2.hieap.cn" "43837";
		"alys.0000299.pre2.hieap.cn" "43785";
		"eap5csxm.admin.pre2.hieap.cn" "39784";
    }
	server {
	    listen              8001;
	    server_name  ~^(\w)*?\.(\w)*?\.pre2\.hieap\.cn$;
	    location / {
		   proxy_pass    http://127.0.0.1:$proxy_pass;
		   proxy_buffer_size 1024k;
		   proxy_buffers 16 1024k;
		   proxy_busy_buffers_size 2048k;
		   proxy_temp_file_write_size 2048k;
	       proxy_http_version 1.1;
	       proxy_set_header Upgrade $http_upgrade;
	       proxy_set_header Connection "upgrade";
	       proxy_set_header X-real-ip $remote_addr;
	       proxy_set_header X-Forwarded-For $remote_addr;
	       proxy_set_header Origin "";
	       index  index.html index.htm;
	   }
    }

}