Error during WebSocket handshake: Unexpected response code: 400
解决方案问题出现在nginx的配置文件，需要修改nginx.conf文件。在linux终端中敲入vim /etc/nginx/nginx.conf，找到location这个位置，配置文件如下所示：proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection "upgr