upgradeTransport http.RoundTripper
}

var _ utilnet.TLSClientConfigHolder = &SpdyRoundTripper{}
var _ httpstream.UpgradeRoundTripper = &SpdyRoundTripper{}
var _ utilnet.Dialer = &SpdyRoundTripper{}

// NewRoundTripper creates a new SpdyRoundTripper that will use the specified
// tlsConfig.
func NewRoundTripper(tlsConfig *tls.Config) (*SpdyRoundTripper, error) {
	return NewRoundTripperWithConfig(RoundTripperConfig{

			if err != nil {
				t.Fatalf("error creating request: %s", err)
			}

			spdyTransport, err := NewRoundTripper(testCase.clientTLS)
			if err != nil {
				t.Fatalf("error creating SpdyRoundTripper: %v", err)
			}

			var proxierCalled bool
			var proxyCalledWithHost string
			var proxyCalledWithAuth bool
			var proxyCalledWithAuthHeader string
			if testCase.proxyServerFunc != nil {

		return
	}
	spdyExecutor, err := remotecommand.NewSPDYExecutorRejectRedirects(spdyRoundTripper, spdyRoundTripper, "POST", h.Location)
	if err != nil {
		websocketStreams.writeStatus(apierrors.NewInternalError(err)) //nolint:errcheck
		metrics.IncStreamTranslatorRequest(req.Context(), strconv.Itoa(http.StatusInternalServerError))
		return
	}

		// If using a custom transport, skip server verification on the upgrade.
		// nolint: gosec
		tlsConfig = &tls.Config{
			InsecureSkipVerify: true,
		}
	}

	var upgrader *spdyStream.SpdyRoundTripper
	if restConfig.Proxy != nil {
		upgrader, err = spdyStream.NewRoundTripperWithProxy(tlsConfig, restConfig.Proxy)
		if err != nil {
			return nil, nil, err
		}
	} else {

	upgradeRoundTripper, err := spdy.NewRoundTripper(&tls.Config{})
	if err != nil {
		t.Fatalf("Error creating SpdyRoundTripper: %v", err)
	}
	c := &http.Client{Transport: upgradeRoundTripper}

	resp, err := c.Do(makeReq(t, "POST", url, "v4.channel.k8s.io"))
	if err != nil {
		t.Fatalf("Got error POSTing: %v", err)
	}

	* HostAliases is now parsed with hostAliases json keys to be in line with the feature's name. ([#47512](https://github.com/kubernetes/kubernetes/pull/47512), [@rickypai](https://github.com/rickypai))

	* Add redirect support to SpdyRoundTripper ([#44451](https://github.com/kubernetes/kubernetes/pull/44451), [@ncdc](https://github.com/ncdc))