Nginx反向代理WebSocket

服务器 , 
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location /ws {
    proxy_pass http://?;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
}

实测一个自己的 WS 服务只需proxy_set_header Upgrade $http_upgrade;就足够