nginx配置代理转发后，客户端发送数据，服务端无法收到

location /ws
{
    proxy_pass http://127.0.0.1:2346;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "Upgrade";
    proxy_set_header X-Real-IP $remote_addr;
}

proxy_set_header    Host $host;