mirror of
https://github.com/MetaCubeX/mihomo.git
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239 lines
4.9 KiB
Go
239 lines
4.9 KiB
Go
package outbound
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import (
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"context"
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"encoding/json"
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"errors"
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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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"go.uber.org/atomic"
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)
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type Base struct {
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name string
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addr string
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tp C.AdapterType
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udp bool
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}
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// Name implements C.ProxyAdapter
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func (b *Base) Name() string {
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return b.name
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}
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// Type implements C.ProxyAdapter
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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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// StreamConn implements C.ProxyAdapter
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func (b *Base) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
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return c, errors.New("no support")
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}
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// DialUDP implements C.ProxyAdapter
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func (b *Base) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
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return nil, errors.New("no support")
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}
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// SupportUDP implements C.ProxyAdapter
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func (b *Base) SupportUDP() bool {
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return b.udp
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}
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// MarshalJSON implements C.ProxyAdapter
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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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// Addr implements C.ProxyAdapter
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func (b *Base) Addr() string {
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return b.addr
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}
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// Unwrap implements C.ProxyAdapter
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func (b *Base) Unwrap(metadata *C.Metadata) C.Proxy {
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return nil
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}
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func NewBase(name string, addr string, tp C.AdapterType, udp bool) *Base {
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return &Base{name, addr, tp, udp}
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}
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type conn struct {
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net.Conn
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chain C.Chain
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}
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// Chains implements C.Connection
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func (c *conn) Chains() C.Chain {
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return c.chain
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}
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// AppendToChains implements C.Connection
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func (c *conn) AppendToChains(a C.ProxyAdapter) {
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c.chain = append(c.chain, a.Name())
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}
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func NewConn(c net.Conn, a C.ProxyAdapter) C.Conn {
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return &conn{c, []string{a.Name()}}
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}
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type packetConn struct {
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net.PacketConn
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chain C.Chain
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}
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// Chains implements C.Connection
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func (c *packetConn) Chains() C.Chain {
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return c.chain
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}
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// AppendToChains implements C.Connection
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func (c *packetConn) AppendToChains(a C.ProxyAdapter) {
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c.chain = append(c.chain, a.Name())
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}
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func newPacketConn(pc net.PacketConn, a C.ProxyAdapter) C.PacketConn {
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return &packetConn{pc, []string{a.Name()}}
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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 *atomic.Bool
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}
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// Alive implements C.Proxy
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func (p *Proxy) Alive() bool {
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return p.alive.Load()
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}
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// Dial implements C.Proxy
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func (p *Proxy) Dial(metadata *C.Metadata) (C.Conn, error) {
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ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout)
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defer cancel()
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return p.DialContext(ctx, metadata)
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}
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// DialContext implements C.ProxyAdapter
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func (p *Proxy) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
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conn, err := p.ProxyAdapter.DialContext(ctx, metadata)
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if err != nil {
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p.alive.Store(false)
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}
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return conn, err
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}
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// DelayHistory implements C.Proxy
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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 uint16.
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// implements C.Proxy
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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.Load() {
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return max
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}
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last := p.history.Last()
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if last == nil {
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return max
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}
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history := last.(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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// MarshalJSON implements C.ProxyAdapter
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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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mapping["name"] = p.Name()
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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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// implements C.Proxy
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func (p *Proxy) URLTest(ctx context.Context, url string) (t uint16, err error) {
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defer func() {
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p.alive.Store(err == nil)
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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.DialContext(ctx, &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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req, err := http.NewRequest(http.MethodHead, url, nil)
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if err != nil {
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return
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}
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req = req.WithContext(ctx)
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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{
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Transport: transport,
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CheckRedirect: func(req *http.Request, via []*http.Request) error {
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return http.ErrUseLastResponse
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},
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}
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resp, err := client.Do(req)
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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), atomic.NewBool(true)}
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}
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