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| package burst
|
| import (
| "context"
| "net/http"
| "time"
|
| "github.com/v2fly/v2ray-core/v5/common/net"
| "github.com/v2fly/v2ray-core/v5/transport/internet/tagged"
| )
|
| type pingClient struct {
| destination string
| httpClient *http.Client
| }
|
| func newPingClient(ctx context.Context, destination string, timeout time.Duration, handler string) *pingClient {
| return &pingClient{
| destination: destination,
| httpClient: newHTTPClient(ctx, handler, timeout),
| }
| }
|
| func newDirectPingClient(destination string, timeout time.Duration) *pingClient {
| return &pingClient{
| destination: destination,
| httpClient: &http.Client{Timeout: timeout},
| }
| }
|
| func newHTTPClient(ctxv context.Context, handler string, timeout time.Duration) *http.Client {
| tr := &http.Transport{
| DisableKeepAlives: true,
| DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
| dest, err := net.ParseDestination(network + ":" + addr)
| if err != nil {
| return nil, err
| }
| return tagged.Dialer(ctxv, dest, handler)
| },
| }
| return &http.Client{
| Transport: tr,
| Timeout: timeout,
| // don't follow redirect
| CheckRedirect: func(req *http.Request, via []*http.Request) error {
| return http.ErrUseLastResponse
| },
| }
| }
|
| // MeasureDelay returns the delay time of the request to dest
| func (s *pingClient) MeasureDelay() (time.Duration, error) {
| if s.httpClient == nil {
| panic("pingClient no initialized")
| }
| req, err := http.NewRequest(http.MethodHead, s.destination, nil)
| if err != nil {
| return rttFailed, err
| }
| start := time.Now()
| resp, err := s.httpClient.Do(req)
| if err != nil {
| return rttFailed, err
| }
| // don't wait for body
| resp.Body.Close()
| return time.Since(start), nil
| }
|
|
