if i := strings.Index(host, "%"); i > -1 {
		host = host[:i]
	}
	return net.ParseIP(host) != nil
}

// extractHostPort - extracts host/port from many address formats
// such as, ":9000", "localhost:9000", "http://localhost:9000/"
func extractHostPort(hostAddr string) (string, string, error) {
	var addr, scheme string

	if hostAddr == "" {

		{"http://8.8.8.8:9000/", "8.8.8.8", "9000", nil},
		{"https://facebook.com:9000/", "facebook.com", "9000", nil},
	}

	for i, testCase := range testCases {
		host, port, err := extractHostPort(testCase.addr)
		if testCase.expectedErr == nil && err != nil {
			t.Fatalf("Test %d: should succeed but failed with err: %v", i+1, err)
		}
		if testCase.expectedErr != nil && err == nil {