# File lib/em-websocket/handshake75.rb, line 4
      def self.handshake(headers, path, secure)
        scheme = (secure ? "wss" : "ws")
        location = "#{scheme}://#{headers['host']}#{path}"

        upgrade =  "HTTP/1.1 101 Web Socket Protocol Handshake\r\n"
        upgrade << "Upgrade: WebSocket\r\n"
        upgrade << "Connection: Upgrade\r\n"
        upgrade << "WebSocket-Origin: #{headers['origin']}\r\n"
        upgrade << "WebSocket-Location: #{location}\r\n\r\n"

        return upgrade
      end