// lowercase versions thereof).
//
// The environment values may be either a complete URL or a
// "host[:port]", in which case the "http" scheme is assumed. An error
// is returned if the value is a different form.
func FromEnvironment() *Config {
	return &Config{
		HTTPProxy:  getEnvAny("HTTP_PROXY", "http_proxy"),
		HTTPSProxy: getEnvAny("HTTPS_PROXY", "https_proxy"),
		NoProxy:    getEnvAny("NO_PROXY", "no_proxy"),

		panic("t is not a known test interface")
	}
	h := &HTTPProxyHandler{
		hook: hook,
		httpProxy: httputil.ReverseProxy{
			Director: func(req *http.Request) {
				req.URL.Scheme = "http"
				req.URL.Host = req.Host
			},
		},
		t: t,
	}
	return h
}

// HTTPProxyHandler implements a simple handler for http_proxy and https_proxy
// requests for use in testing.
type HTTPProxyHandler struct {
	handlerDone sync.WaitGroup

	if !localhostPool.AppendCertsFromPEM(localhostCert) {
		t.Errorf("error setting up localhostCert pool")
	}
	return localhostPool
}

// be sure to unset environment variable https_proxy (if exported) before testing, otherwise the testing will fail unexpectedly.
func TestRoundTripAndNewConnection(t *testing.T) {
	localhostPool := localhostCertPool(t)

	testCases := map[string]struct {

		}
	}

	t.Setenv("HTTP_PROXY", "http://proxy.example.com:3128")
	t.Setenv("HTTPS_PROXY", "https://proxy.example.com:3128")
	t.Setenv("NO_PROXY", "example.com,10.0.0.0/8,2001:db8::/48")
	// Check if we can reliably execute tests:
	// ProxyFromEnvironment caches the *_proxy environment variables and
	// if ProxyFromEnvironment already executed before our test with empty

	// Issue 16405: don't use HTTP_PROXY in a CGI environment,
	// where HTTP_PROXY can be attacker-controlled.
	{env: "http://10.1.2.3:8080", reqmeth: "POST",
		want:    "<nil>",
		wanterr: errors.New("refusing to use HTTP_PROXY value in CGI environment; see golang.org/s/cgihttpproxy")},

	{want: "<nil>"},

	_ "unsafe"

	"golang.org/x/net/http/httpguts"
	"golang.org/x/net/http/httpproxy"
)

// DefaultTransport is the default implementation of [Transport] and is
// used by [DefaultClient]. It establishes network connections as needed
// and caches them for reuse by subsequent calls. It uses HTTP proxies
// as directed by the environment variables HTTP_PROXY, HTTPS_PROXY
// and NO_PROXY (or the lowercase versions thereof).

            ]
          }
        ],
        "listener_filters": [
          {
            "name": "envoy.listener.original_dst"
          }
        ]
      },
      {
        "name": "http_proxy",
        "address": {
          "socket_address": {
            "address": "0.0.0.0",
            "port_value": 17002
          }
        },
        "filter_chains": [
          {

        HttpProxySettings.HttpProxy httpProxy = httpSettings.getProxySettings().getProxy();
        HttpProxySettings.HttpProxy httpsProxy = httpSettings.getSecureProxySettings().getProxy();

        for (HttpProxySettings.HttpProxy proxy : Lists.newArrayList(httpProxy, httpsProxy)) {
            if (proxy != null) {
                if (proxy.credentials != null) {

		name string
		out  protocol.Instance
	}{
		{"tcp", protocol.TCP},
		{"http", protocol.HTTP},
		{"HTTP", protocol.HTTP},
		{"Http", protocol.HTTP},
		{"http_proxy", protocol.HTTP_PROXY},
		{"Http_Proxy", protocol.HTTP_PROXY},
		{"HTTP_PROXY", protocol.HTTP_PROXY},
		{"https", protocol.HTTPS},
		{"http2", protocol.HTTP2},
		{"grpc", protocol.GRPC},
		{"grpc-web", protocol.GRPCWeb},
		{"gRPC-Web", protocol.GRPCWeb},

		if got := cm.key().String(); got != tt.key {
			t.Fatalf("{%q, %q, %q} cache key = %q; want %q", tt.proxy, tt.scheme, tt.addr, got, tt.key)
		}
	}
}

func ResetProxyEnv() {
	for _, v := range []string{"HTTP_PROXY", "http_proxy", "NO_PROXY", "no_proxy", "REQUEST_METHOD"} {
		os.Unsetenv(v)
	}
	ResetCachedEnvironment()