gistfile1.txt

~>curl -i -N -H "Connection: Upgrade" -H "Upgrade: websocket" -H "Host: api.example.com" -H "Origin: https://www.example.com" https://api.example.com/socket
HTTP/2 301
date: Tue, 26 Jun 2018 02:27:07 GMT
content-type: application/json
content-length: 4
location: https://localhost:9999/localhost
server: restify
access-control-allow-origin: https://www.example.com
vary: origin
access-control-expose-headers: api-version, content-length, content-md5, content-type, date, request-id, response-time