forked from WhoJave/clash
/
urltest.go
132 lines (109 loc) · 2.75 KB
/
urltest.go
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package outboundgroup
import (
"context"
"encoding/json"
"time"
"github.com/paradiseduo/clashr/adapters/outbound"
"github.com/paradiseduo/clashr/adapters/provider"
"github.com/paradiseduo/clashr/common/singledo"
C "github.com/paradiseduo/clashr/constant"
)
type urlTestOption func(*URLTest)
func urlTestWithTolerance(tolerance uint16) urlTestOption {
return func(u *URLTest) {
u.tolerance = tolerance
}
}
type URLTest struct {
*outbound.Base
tolerance uint16
fastNode C.Proxy
single *singledo.Single
fastSingle *singledo.Single
providers []provider.ProxyProvider
}
func (u *URLTest) Now() string {
return u.fast().Name()
}
func (u *URLTest) DialContext(ctx context.Context, metadata *C.Metadata) (c C.Conn, err error) {
c, err = u.fast().DialContext(ctx, metadata)
if err == nil {
c.AppendToChains(u)
}
return c, err
}
func (u *URLTest) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
pc, err := u.fast().DialUDP(metadata)
if err == nil {
pc.AppendToChains(u)
}
return pc, err
}
func (u *URLTest) Unwrap(metadata *C.Metadata) C.Proxy {
return u.fast()
}
func (u *URLTest) proxies() []C.Proxy {
elm, _, _ := u.single.Do(func() (interface{}, error) {
return getProvidersProxies(u.providers), nil
})
return elm.([]C.Proxy)
}
func (u *URLTest) fast() C.Proxy {
elm, _, _ := u.fastSingle.Do(func() (interface{}, error) {
proxies := u.proxies()
fast := proxies[0]
min := fast.LastDelay()
for _, proxy := range proxies[1:] {
if !proxy.Alive() {
continue
}
delay := proxy.LastDelay()
if delay < min {
fast = proxy
min = delay
}
}
// tolerance
if u.fastNode == nil || u.fastNode.LastDelay() > fast.LastDelay() + u.tolerance {
u.fastNode = fast
}
return u.fastNode, nil
})
return elm.(C.Proxy)
}
func (u *URLTest) SupportUDP() bool {
return u.fast().SupportUDP()
}
func (u *URLTest) MarshalJSON() ([]byte, error) {
var all []string
for _, proxy := range u.proxies() {
all = append(all, proxy.Name())
}
return json.Marshal(map[string]interface{}{
"type": u.Type().String(),
"now": u.Now(),
"all": all,
})
}
func parseURLTestOption(config map[string]interface{}) []urlTestOption {
opts := []urlTestOption{}
// tolerance
if elm, ok := config["tolerance"]; ok {
if tolerance, ok := elm.(int); ok {
opts = append(opts, urlTestWithTolerance(uint16(tolerance)))
}
}
return opts
}
func NewURLTest(name string, providers []provider.ProxyProvider, options ...urlTestOption) *URLTest {
urlTest := &URLTest{
Base: outbound.NewBase(name, "", C.URLTest, false),
single: singledo.NewSingle(defaultGetProxiesDuration),
fastSingle: singledo.NewSingle(time.Second * 10),
providers: providers,
}
for _, option := range options {
option(urlTest)
}
return urlTest
}