GET /ABC/DEF/ HTTP/1.1
Origin: null
Sec-WebSocket-Key: 2Wg20829/4ziWlmsUAD8Dg==
Connection: Upgrade
Upgrade: Websocket
Sec-WebSocket-Version: 13
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
Host: localhost:1234
Cache-Control: no-cache
