nginx配置

    
server { 
	listen       443 ssl; 
	server_name  www.a.com; 
	location / {
		proxy_pass http://192.168.1.100;
		proxy_redirect  http://$host/ /; 
		proxy_set_header Host $host:$server_port;
		proxy_set_header X-Real-IP $remote_addr;
		proxy_set_header X-Real-PORT $remote_port;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		add_header Access-Control-Allow-Origin *;
		add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
		add_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';

		if ($request_method = 'OPTIONS') {
			return 204;
		}
	} 

}