mirror of https://github.com/XTLS/Xray-core
75 lines
1.9 KiB
Go
75 lines
1.9 KiB
Go
package vtime
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import (
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"context"
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"runtime"
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"sync"
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"sync/atomic"
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"time"
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"github.com/xtls/xray-core/common/errors"
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"github.com/xtls/xray-core/common/platform"
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"github.com/xtls/xray-core/common/protocol/http"
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)
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var timeOffset atomic.Pointer[time.Duration]
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var initOnce sync.Once
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func updateTimeMonitor(ctx context.Context, domain string) {
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for {
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select {
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case <-ctx.Done():
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return
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case <-time.After(10 * time.Minute):
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err := updateTime(domain)
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if err != nil {
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errors.LogError(ctx, err)
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}
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}
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}
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}
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func updateTime(domain string) error {
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httpClient := http.NewClient()
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resp, err := httpClient.Get(domain)
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if err != nil {
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return errors.New("Failed to access monitor domain").Base(err)
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}
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timeHeader := resp.Header.Get("Date")
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remoteTime, err := time.Parse(time.RFC1123, timeHeader)
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if err != nil {
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return errors.New("Failed to parse time from monitor domain").Base(err)
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}
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localTime := time.Now()
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offset := remoteTime.Sub(localTime)
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if offset < 2*time.Second && offset > -2*time.Second {
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errors.LogWarning(context.Background(), "Time offset too small, ignoring:", offset)
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return nil
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}
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timeOffset.Store(&offset)
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return nil
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}
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func Now() time.Time {
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initOnce.Do(func() {
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timeOffset.Store(new(time.Duration))
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go func() {
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domain := platform.NewEnvFlag("xray.vmess.time.domain").GetValue(func() string { return "https://apple.com" })
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if domain == "" {
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errors.LogError(context.Background(), "vmess time domain is empty, skip time sync")
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return
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}
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err := updateTime(domain)
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if err != nil {
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errors.LogError(context.Background(), err)
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}
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errors.LogWarning(context.Background(), "Initial time offset for vmess:", timeOffset.Load())
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// only one sync should be enough, so disable periodic update for now
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//go updateTimeMonitor(context.TODO(), domain)
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}()
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runtime.Gosched()
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})
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offset := timeOffset.Load()
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return time.Now().Add(*offset)
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}
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