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