nginx 反向代理 websocket

upstream webacked{
     server 127.0.0.1:9505; #目标服务器websockt地址
}
server {
    # 监听当前服务器端口
    listen 9888;
    location / {
        proxy_pass http://webacked;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}