# File lib/em-socksify/connect.rb, line 4
      def connect_send_handshake
        header =  "CONNECT #{@connect_target_host}:#{@connect_target_port} HTTP/1.0\r\n"
        if @connect_username || @connect_password
          encoded_credentials = Base64.strict_encode64([@connect_username, @connect_password].join(":"))
          header << "Proxy-Authorization: Basic #{encoded_credentials}\r\n"
        end

        header << "\r\n"
        send_data(header)
      end