websocket: the client is not using the websocket protocol: ‘upgrade’ token not found in ‘Connection’ head，客戶端沒有使用websocket協議:'upgrade'令牌未在'Connection'頭中找到

錯誤分析

websocket: the client is not using the websocket protocol: 'upgrade' token not found in 'Connection' head

當反向代理或負載均衡未正確傳遞WebSocket請求時，就會出現此問題。

解決方案

Nginx加上以下解析

proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection upgrade

Apache加上以下解析

 <Location /ws>
     ProxyPass ws://localhost:8000
     ProxyPassReverse ws://localhost:8000/
 </Location>