nginx.conf文件配置，包含获取客户端真实ip、代理websocket
# nginx获取真实ip
# 下面三行为重点，添加后就可以获取到客户端真实IP
set_real_ip_from 0.0.0.0/0;
real_ip_header X-Forwarded-For;
real_ip_recursive on;
# 下面三行为常见反向代理传递真实客户端IP的配置，配置在http{}中，则全局应用在下面的所有server中
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# nginx代理websocket
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";