proxyURL, err := s.proxier(req)
	if err != nil {
		return nil, err
	}

	if proxyURL == nil {
		return s.dialWithoutProxy(req.Context(), req.URL)
	}

	switch proxyURL.Scheme {
	case "socks5":
		return s.dialWithSocks5Proxy(req, proxyURL)
	case "https", "http", "":
		return s.dialWithHttpProxy(req, proxyURL)
	}

	if proxy == "" {
		return nil, nil
	}

	proxyURL, err := url.Parse(proxy)
	if err != nil || proxyURL.Scheme == "" || proxyURL.Host == "" {
		// proxy was bogus. Try prepending "http://" to it and
		// see if that parses correctly. If not, we fall
		// through and complain about the original one.
		if proxyURL, err := url.Parse("http://" + proxy); err == nil {
			return proxyURL, nil
		}
	}
	if err != nil {

	c.hboneTLSConfig, err = newHBONETLSConfig(c)
	if err != nil {
		return err
	}

	// Parse the proxy if specified.
	if len(c.Proxy) > 0 {
		proxyURL, err := url.Parse(c.Proxy)
		if err != nil {
			return err
		}

		c.proxyURL = http.ProxyURL(proxyURL)
	}

	// Configure reuseConnection and forceDNSLookup as appropriate.
	switch c.scheme {
	case scheme.DNS:
		c.newConnectionPerRequest = true

	} else {
		h.payloadType = "application/json"
	}

	// If proxy available, set the same
	if h.config.Proxy != "" {
		proxyURL, _ := url.Parse(h.config.Proxy)
		transport := h.config.Transport
		ctransport := transport.(*http.Transport).Clone()
		ctransport.Proxy = http.ProxyURL(proxyURL)
		h.config.Transport = ctransport
	}

	h.client = &http.Client{Transport: h.config.Transport}
	return h, nil
}

				spdyTransport.proxier = func(proxierReq *http.Request) (*url.URL, error) {
					proxierCalled = true
					proxyURL, err := url.Parse(proxy.URL)
					if err != nil {
						return nil, err
					}
					proxyURL.User = testCase.proxyAuth
					return proxyURL, nil
				}
			}

			client := &http.Client{Transport: spdyTransport}

			resp, err := client.Do(req)

API rule violation: names_match,k8s.io/client-go/pkg/apis/clientauthentication/v1,Cluster,InsecureSkipTLSVerify
API rule violation: names_match,k8s.io/client-go/pkg/apis/clientauthentication/v1,Cluster,ProxyURL
API rule violation: names_match,k8s.io/client-go/pkg/apis/clientauthentication/v1,Cluster,TLSServerName
API rule violation: names_match,k8s.io/client-go/pkg/apis/clientauthentication/v1beta1,Cluster,CertificateAuthorityData

		"GODEBUG=" + os.Getenv("GODEBUG"),
		"GOEXE=" + cfg.ExeSuffix,
		"GOEXPERIMENT=" + os.Getenv("GOEXPERIMENT"),
		"GOOS=" + runtime.GOOS,
		"TESTGO_GOHOSTOS=" + goHostOS,
		"GOPROXY=" + proxyURL,
		"GOPRIVATE=",
		"GOROOT=" + testGOROOT,
		"GOTRACEBACK=system",
		"TESTGONETWORK=panic", // allow only local connections by default; the [net] condition resets this
		"TESTGO_GOROOT=" + testGOROOT,

			Exec:                  auths.Exec,
			// Extensions: Not needed,
		}

		// Other relevant fields that are not acted on:
		// * Cluster.Server (and ProxyURL). This allows the user to send requests to arbitrary URLs, enabling potential SSRF attacks.
		//   However, we don't actually know what valid URLs are, so we cannot reasonably constrain this. Instead,