GET /demo HTTP/1.1
Upgrade: WebSocket
Connection: Upgrade
Host: example.com
Origin: http://example.com
Sec-WebSocket-Protocol: sample
Sec-WebSocket-Key1: 18x 6]8vM;54 *(5:  {   U1]8  z [  8
Sec-WebSocket-Key2: 1_ tx7X d  <  nw  334J702) 7]o}` 0
Content-Length: 8
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