"get"
"post"
"get /"
"http/1.1"
"upgrade: websocket"
"\x0D\x0A"
"sec-websocket-key: dGhlIHNhbXBsZSBub25jZQ=="
"sec-websocket-version: 13"
"get / http/1.1"
"sec-websocket-extensions: permessage-deflate"
"sec-websocket-protocol: "
" "