// license that can be found in the LICENSE file.

// Package httpproxy provides support for HTTP proxy determination
// based on environment variables, as provided by net/http's
// ProxyFromEnvironment function.
//
// The API is not subject to the Go 1 compatibility promise and may change at
// any time.
package httpproxy

import (
	"errors"
	"fmt"
	"net"
	"net/url"
	"os"
	"strings"

		}
		url.Scheme = "https"
		source = url.String()
	}

	client := &http.Client{
		Transport: &http.Transport{
			ResponseHeaderTimeout: timeout + 5*time.Second,
			Proxy:                 http.ProxyFromEnvironment,
			TLSClientConfig:       tlsConfig,
		},
	}
	resp, err := client.Get(source)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {

		}

		config := &tls.Config{
			ServerName: u.Hostname(),
			RootCAs:    caCertPool,
			MinVersion: tls.VersionTLS12,
		}

		httpClient.Transport = &http.Transport{
			Proxy:           http.ProxyFromEnvironment,
			TLSClientConfig: config,
			DialContext: (&net.Dialer{
				Timeout: time.Second * 10,
			}).DialContext,
			IdleConnTimeout:       90 * time.Second,
			TLSHandshakeTimeout:   10 * time.Second,

	return sha256Sum, releaseTime, releaseInfo, err
}

func getUpdateTransport(timeout time.Duration) http.RoundTripper {
	var updateTransport http.RoundTripper = &http.Transport{
		Proxy:                 http.ProxyFromEnvironment,
		DialContext:           xhttp.NewInternodeDialContext(timeout, globalTCPOptions),
		IdleConnTimeout:       timeout,
		TLSHandshakeTimeout:   timeout,
		ExpectContinueTimeout: timeout,

			// never performed.
			caPool := x509.NewCertPool()
			require.True(t, caPool.AppendCertsFromPEM(caCert))

			client := &http.Client{
				Transport: &http.Transport{
					Proxy: http.ProxyFromEnvironment,
					TLSClientConfig: &tls.Config{
						RootCAs: caPool,
					},
				},
			}

			_, err = client.Transport.RoundTrip(req)

			if sha1checker.CheckRoundTripError(err) {

// as directed by the environment variables HTTP_PROXY, HTTPS_PROXY
// and NO_PROXY (or the lowercase versions thereof).
var DefaultTransport RoundTripper = &Transport{
	Proxy: ProxyFromEnvironment,
	DialContext: defaultTransportDialContext(&net.Dialer{
		Timeout:   30 * time.Second,
		KeepAlive: 30 * time.Second,
	}),
	ForceAttemptHTTP2:     true,
	MaxIdleConns:          100,

		responder   *fakeResponder
		expectedErr = errors.New("EXPECTED")
	)
	proxy := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		transport := &http.Transport{
			Proxy: http.ProxyFromEnvironment,
			DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
				return &fakeConn{err: expectedErr}, nil
			},
			MaxIdleConns:          100,
			IdleConnTimeout:       90 * time.Second,

			os.Setenv("HTTP_PROXY", tt.env)
			os.Setenv("HTTPS_PROXY", tt.httpsenv)
			os.Setenv("NO_PROXY", tt.noenv)
			os.Setenv("REQUEST_METHOD", tt.reqmeth)
			ResetCachedEnvironment()
			return ProxyFromEnvironment(req)
		})
	}
}

func TestProxyFromEnvironmentLowerCase(t *testing.T) {
	ResetProxyEnv()
	defer ResetProxyEnv()
	for _, tt := range proxyFromEnvTests {

		{"ParseHTTPVersion", Func, 0},
		{"ParseTime", Func, 1},
		{"Post", Func, 0},
		{"PostForm", Func, 0},
		{"ProtocolError", Type, 0},
		{"ProtocolError.ErrorString", Field, 0},
		{"ProxyFromEnvironment", Func, 0},
		{"ProxyURL", Func, 0},
		{"PushOptions", Type, 8},
		{"PushOptions.Header", Field, 8},
		{"PushOptions.Method", Field, 8},
		{"Pusher", Type, 8},
		{"ReadRequest", Func, 0},

pkg net/http, func ParseHTTPVersion(string) (int, int, bool)
pkg net/http, func Post(string, string, io.Reader) (*Response, error)
pkg net/http, func PostForm(string, url.Values) (*Response, error)
pkg net/http, func ProxyFromEnvironment(*Request) (*url.URL, error)
pkg net/http, func ProxyURL(*url.URL) func(*Request) (*url.URL, error)
pkg net/http, func ReadRequest(*bufio.Reader) (*Request, error)