nginx代理后无法访问资源

反向代理BI服务A 到服务B 后，通过服务B访问登录进入后提示 ：数据解析失败 且 前端报错 Websocket connection 'xxxxxxxx' failed: Error during Websocket handshake: Unexpected response code :200

参考下呢https://club.yonghongtech.com/thread-9652-1-1.html

代理请求 设置请求头即可：
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";