137 lines
2.3 KiB
Go
137 lines
2.3 KiB
Go
package adapters
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import (
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"encoding/json"
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"errors"
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"net"
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"sort"
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"sync"
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"sync/atomic"
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"time"
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C "github.com/Dreamacro/clash/constant"
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)
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type URLTest struct {
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*Base
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proxies []C.Proxy
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rawURL string
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fast C.Proxy
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interval time.Duration
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done chan struct{}
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once int32
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}
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type URLTestOption struct {
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Name string `proxy:"name"`
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Proxies []string `proxy:"proxies"`
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URL string `proxy:"url"`
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Interval int `proxy:"interval"`
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}
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func (u *URLTest) Now() string {
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return u.fast.Name()
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}
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func (u *URLTest) Generator(metadata *C.Metadata) (net.Conn, error) {
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a, err := u.fast.Generator(metadata)
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if err != nil {
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go u.speedTest()
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}
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return a, err
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}
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func (u *URLTest) MarshalJSON() ([]byte, error) {
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var all []string
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for _, proxy := range u.proxies {
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all = append(all, proxy.Name())
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}
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sort.Strings(all)
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return json.Marshal(map[string]interface{}{
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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 (u *URLTest) Close() {
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u.done <- struct{}{}
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}
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func (u *URLTest) loop() {
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tick := time.NewTicker(u.interval)
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go u.speedTest()
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Loop:
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for {
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select {
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case <-tick.C:
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go u.speedTest()
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case <-u.done:
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break Loop
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}
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}
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}
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func (u *URLTest) speedTest() {
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if atomic.AddInt32(&u.once, 1) != 1 {
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return
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}
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defer atomic.StoreInt32(&u.once, 0)
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wg := sync.WaitGroup{}
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wg.Add(len(u.proxies))
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c := make(chan interface{})
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fast := selectFast(c)
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timer := time.NewTimer(u.interval)
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for _, p := range u.proxies {
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go func(p C.Proxy) {
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_, err := DelayTest(p, u.rawURL)
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if err == nil {
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c <- p
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}
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wg.Done()
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}(p)
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}
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go func() {
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wg.Wait()
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close(c)
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}()
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select {
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case <-timer.C:
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// Wait for fast to return or close.
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<-fast
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case p, open := <-fast:
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if open {
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u.fast = p.(C.Proxy)
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}
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}
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}
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func NewURLTest(option URLTestOption, proxies []C.Proxy) (*URLTest, error) {
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_, err := urlToMetadata(option.URL)
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if err != nil {
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return nil, err
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}
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if len(proxies) < 1 {
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return nil, errors.New("The number of proxies cannot be 0")
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}
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interval := time.Duration(option.Interval) * time.Second
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urlTest := &URLTest{
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Base: &Base{
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name: option.Name,
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tp: C.URLTest,
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},
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proxies: proxies[:],
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rawURL: option.URL,
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fast: proxies[0],
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interval: interval,
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done: make(chan struct{}),
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once: 0,
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}
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go urlTest.loop()
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return urlTest, nil
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}
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