package outboundgroup import ( "context" "encoding/json" "time" "github.com/Dreamacro/clash/adapter/outbound" "github.com/Dreamacro/clash/common/singledo" "github.com/Dreamacro/clash/component/dialer" C "github.com/Dreamacro/clash/constant" "github.com/Dreamacro/clash/constant/provider" ) type urlTestOption func(*URLTest) func urlTestWithTolerance(tolerance uint16) urlTestOption { return func(u *URLTest) { u.tolerance = tolerance } } type URLTest struct { *outbound.Base tolerance uint16 disableUDP bool fastNode C.Proxy single *singledo.Single fastSingle *singledo.Single providers []provider.ProxyProvider } func (u *URLTest) Now() string { return u.fast(false).Name() } // DialContext implements C.ProxyAdapter func (u *URLTest) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (c C.Conn, err error) { c, err = u.fast(true).DialContext(ctx, metadata, u.Base.DialOptions(opts...)...) if err == nil { c.AppendToChains(u) } return c, err } // ListenPacketContext implements C.ProxyAdapter func (u *URLTest) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) { pc, err := u.fast(true).ListenPacketContext(ctx, metadata, u.Base.DialOptions(opts...)...) if err == nil { pc.AppendToChains(u) } return pc, err } // Unwrap implements C.ProxyAdapter func (u *URLTest) Unwrap(metadata *C.Metadata) C.Proxy { return u.fast(true) } func (u *URLTest) proxies(touch bool) []C.Proxy { elm, _, _ := u.single.Do(func() (any, error) { return getProvidersProxies(u.providers, touch), nil }) return elm.([]C.Proxy) } func (u *URLTest) fast(touch bool) C.Proxy { elm, _, shared := u.fastSingle.Do(func() (any, error) { proxies := u.proxies(touch) fast := proxies[0] min := fast.LastDelay() fastNotExist := true for _, proxy := range proxies[1:] { if u.fastNode != nil && proxy.Name() == u.fastNode.Name() { fastNotExist = false } if !proxy.Alive() { continue } delay := proxy.LastDelay() if delay < min { fast = proxy min = delay } } // tolerance if u.fastNode == nil || fastNotExist || !u.fastNode.Alive() || u.fastNode.LastDelay() > fast.LastDelay()+u.tolerance { u.fastNode = fast } return u.fastNode, nil }) if shared && touch { // a shared fastSingle.Do() may cause providers untouched, so we touch them again touchProviders(u.providers) } return elm.(C.Proxy) } // SupportUDP implements C.ProxyAdapter func (u *URLTest) SupportUDP() bool { if u.disableUDP { return false } return u.fast(false).SupportUDP() } // MarshalJSON implements C.ProxyAdapter func (u *URLTest) MarshalJSON() ([]byte, error) { var all []string for _, proxy := range u.proxies(false) { all = append(all, proxy.Name()) } return json.Marshal(map[string]any{ "type": u.Type().String(), "now": u.Now(), "all": all, }) } func parseURLTestOption(config map[string]any) []urlTestOption { opts := []urlTestOption{} // tolerance if tolerance, ok := config["tolerance"].(int); ok { opts = append(opts, urlTestWithTolerance(uint16(tolerance))) } return opts } func NewURLTest(option *GroupCommonOption, providers []provider.ProxyProvider, options ...urlTestOption) *URLTest { urlTest := &URLTest{ Base: outbound.NewBase(outbound.BaseOption{ Name: option.Name, Type: C.URLTest, Interface: option.Interface, RoutingMark: option.RoutingMark, }), single: singledo.NewSingle(defaultGetProxiesDuration), fastSingle: singledo.NewSingle(time.Second * 10), providers: providers, disableUDP: option.DisableUDP, } for _, option := range options { option(urlTest) } return urlTest }