135 lines
2.6 KiB
Go
135 lines
2.6 KiB
Go
package adapters
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import (
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"encoding/json"
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"net"
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"net/http"
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"time"
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"github.com/Dreamacro/clash/common/queue"
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C "github.com/Dreamacro/clash/constant"
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)
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type Base struct {
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name string
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tp C.AdapterType
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}
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func (b *Base) Name() string {
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return b.name
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}
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func (b *Base) Type() C.AdapterType {
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return b.tp
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}
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func (b *Base) Destroy() {}
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func (b *Base) MarshalJSON() ([]byte, error) {
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return json.Marshal(map[string]string{
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"type": b.Type().String(),
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})
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}
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type Proxy struct {
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C.ProxyAdapter
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history *queue.Queue
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alive bool
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}
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func (p *Proxy) Alive() bool {
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return p.alive
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}
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func (p *Proxy) Dial(metadata *C.Metadata) (net.Conn, error) {
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conn, err := p.ProxyAdapter.Dial(metadata)
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p.alive = err == nil
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return conn, err
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}
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func (p *Proxy) DelayHistory() []C.DelayHistory {
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queue := p.history.Copy()
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histories := []C.DelayHistory{}
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for _, item := range queue {
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histories = append(histories, item.(C.DelayHistory))
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}
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return histories
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}
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// LastDelay return last history record. if proxy is not alive, return the max value of int16.
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func (p *Proxy) LastDelay() (delay uint16) {
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var max uint16 = 0xffff
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if !p.alive {
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return max
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}
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head := p.history.First()
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if head == nil {
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return max
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}
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history := head.(C.DelayHistory)
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if history.Delay == 0 {
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return max
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}
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return history.Delay
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}
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func (p *Proxy) MarshalJSON() ([]byte, error) {
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inner, err := p.ProxyAdapter.MarshalJSON()
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if err != nil {
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return inner, err
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}
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mapping := map[string]interface{}{}
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json.Unmarshal(inner, &mapping)
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mapping["history"] = p.DelayHistory()
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return json.Marshal(mapping)
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}
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// URLTest get the delay for the specified URL
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func (p *Proxy) URLTest(url string) (t uint16, err error) {
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defer func() {
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record := C.DelayHistory{Time: time.Now()}
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if err == nil {
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record.Delay = t
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}
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p.history.Put(record)
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if p.history.Len() > 10 {
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p.history.Pop()
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}
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}()
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addr, err := urlToMetadata(url)
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if err != nil {
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return
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}
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start := time.Now()
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instance, err := p.Dial(&addr)
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if err != nil {
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return
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}
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defer instance.Close()
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transport := &http.Transport{
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Dial: func(string, string) (net.Conn, error) {
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return instance, nil
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},
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// from http.DefaultTransport
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MaxIdleConns: 100,
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IdleConnTimeout: 90 * time.Second,
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TLSHandshakeTimeout: 10 * time.Second,
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ExpectContinueTimeout: 1 * time.Second,
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}
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client := http.Client{Transport: transport}
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resp, err := client.Get(url)
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if err != nil {
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return
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}
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resp.Body.Close()
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t = uint16(time.Since(start) / time.Millisecond)
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return
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}
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func NewProxy(adapter C.ProxyAdapter) *Proxy {
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return &Proxy{adapter, queue.New(10), true}
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}
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