location /chatroom {
  proxy_pass  http://127.0.0.1:38577/chatroom;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  # 代理长连接需要
  proxy_http_version 1.1;
  proxy_set_header Connection "";
}