package router import ( "context" "github.com/xtls/xray-core/app/observatory" "github.com/xtls/xray-core/common" "github.com/xtls/xray-core/core" "github.com/xtls/xray-core/features/extension" ) type LeastPingStrategy struct { ctx context.Context observatory extension.Observatory } func (l *LeastPingStrategy) InjectContext(ctx context.Context) { l.ctx = ctx } func (l *LeastPingStrategy) PickOutbound(strings []string) string { if l.observatory == nil { common.Must(core.RequireFeatures(l.ctx, func(observatory extension.Observatory) error { l.observatory = observatory return nil })) } observeReport, err := l.observatory.GetObservation(l.ctx) if err != nil { newError("cannot get observe report").Base(err).WriteToLog() return "" } outboundsList := outboundList(strings) if result, ok := observeReport.(*observatory.ObservationResult); ok { status := result.Status leastPing := int64(99999999) selectedOutboundName := "" for _, v := range status { if outboundsList.contains(v.OutboundTag) && v.Alive && v.Delay < leastPing { selectedOutboundName = v.OutboundTag leastPing = v.Delay } } return selectedOutboundName } // No way to understand observeReport return "" } type outboundList []string func (o outboundList) contains(name string) bool { for _, v := range o { if v == name { return true } } return false }