mirror of
https://github.com/Monibuca/engine.git
synced 2025-10-05 08:36:56 +08:00
307 lines
7.9 KiB
Go
307 lines
7.9 KiB
Go
package engine
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import (
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"context"
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"crypto/md5"
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"errors"
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"fmt"
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"io"
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"net/url"
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"reflect"
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"strconv"
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"strings"
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"time"
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"go.uber.org/zap"
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"go.uber.org/zap/zapcore"
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"m7s.live/engine/v4/common"
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"m7s.live/engine/v4/config"
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"m7s.live/engine/v4/log"
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"m7s.live/engine/v4/util"
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)
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type IOConfig interface {
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config.Publish | config.Subscribe
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}
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type ClientConfig interface {
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config.Pull | config.Push
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}
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type AuthSub interface {
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OnAuth(*util.Promise[ISubscriber]) error
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}
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type AuthPub interface {
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OnAuth(*util.Promise[IPublisher]) error
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}
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// 发布者或者订阅者的共用结构体
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type IO struct {
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ID string
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Type string
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RemoteAddr string
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context.Context `json:"-" yaml:"-"` //不要直接设置，应当通过SetParentCtx传入父级Context
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context.CancelCauseFunc `json:"-" yaml:"-"` //流关闭是关闭发布者或者订阅者
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*log.Logger `json:"-" yaml:"-"`
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StartTime time.Time //创建时间
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Stream *Stream `json:"-" yaml:"-"`
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io.Reader `json:"-" yaml:"-"`
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io.Writer `json:"-" yaml:"-"`
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io.Closer `json:"-" yaml:"-"`
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Args url.Values
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Spesific common.IIO `json:"-" yaml:"-"`
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}
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func (io *IO) GetStream() common.IStream {
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return io.Stream
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}
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func (io *IO) IsClosed() bool {
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return io.Err() != nil
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}
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// SetIO（可选） 设置Writer、Reader、Closer
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func (i *IO) SetIO(conn any) {
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if v, ok := conn.(io.Closer); ok {
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i.Closer = v
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}
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if v, ok := conn.(io.Reader); ok {
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i.Reader = v
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}
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if v, ok := conn.(io.Writer); ok {
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i.Writer = v
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}
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}
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// SetParentCtx（可选）
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func (i *IO) SetParentCtx(parent context.Context) {
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i.Context, i.CancelCauseFunc = context.WithCancelCause(parent)
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}
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func (i *IO) SetLogger(logger *log.Logger) {
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i.Logger = logger
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}
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func (i *IO) OnEvent(event any) {
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switch event.(type) {
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case SEclose:
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i.close(StopError{zap.String("event", "close")})
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case SEKick:
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i.close(StopError{zap.String("event", "kick")})
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}
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}
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func (io *IO) IsShutdown() bool {
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if io.Stream == nil {
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return false
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}
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return io.Stream.IsShutdown()
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}
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func (i *IO) close(err StopError) bool {
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if i.IsClosed() {
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i.Debug("already closed", err...)
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return false
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}
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i.Info("close", err...)
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if i.CancelCauseFunc != nil {
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i.CancelCauseFunc(err)
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}
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if i.Closer != nil {
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i.Closer.Close()
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}
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return true
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}
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// Stop 停止订阅或者发布，由订阅者或者发布者调用
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func (io *IO) Stop(reason ...zapcore.Field) {
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io.close(StopError(reason))
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}
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type StopError []zapcore.Field
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func (s StopError) Error() string {
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return "stop"
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}
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var (
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ErrDuplicatePublish = errors.New("Duplicate Publish")
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ErrBadStreamName = errors.New("StreamPath Illegal")
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ErrBadTrackName = errors.New("Track Already Exist")
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ErrTrackMute = errors.New("Track Mute")
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ErrStreamIsClosed = errors.New("Stream Is Closed")
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ErrPublisherLost = errors.New("Publisher Lost")
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ErrAuth = errors.New("Auth Failed")
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OnAuthSub func(p *util.Promise[ISubscriber]) error
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OnAuthPub func(p *util.Promise[IPublisher]) error
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)
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func (io *IO) auth(key string, secret string, expire string) bool {
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if unixTime, err := strconv.ParseInt(expire, 16, 64); err != nil || time.Now().Unix() > unixTime {
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if EngineConfig.LogLang == "zh" {
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log.Error("鉴权失败，时间戳过期了", zap.String("expire", expire))
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} else {
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log.Error("auth failed expired", zap.String("expire", expire))
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}
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return false
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}
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if len(secret) != 32 {
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if EngineConfig.LogLang == "zh" {
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log.Error("鉴权失败,密文应该是32位长度", zap.String("secret", secret))
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} else {
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log.Error("auth failed secret length must be 32", zap.String("secret", secret))
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}
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return false
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}
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trueSecret := md5.Sum([]byte(key + io.Stream.Path + expire))
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for i := 0; i < 16; i++ {
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hex, err := strconv.ParseInt(secret[i<<1:(i<<1)+2], 16, 16)
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if trueSecret[i] != byte(hex) || err != nil {
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if EngineConfig.LogLang == "zh" {
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log.Error("鉴权失败,密文不匹配", zap.String("secret", secret))
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} else {
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log.Error("auth failed invalid secret ", zap.String("secret", secret))
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}
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return false
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}
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}
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return true
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}
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// receive 用于接收发布或者订阅
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func (io *IO) receive(streamPath string, specific common.IIO) error {
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streamPath = strings.Trim(streamPath, "/")
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u, err := url.Parse(streamPath)
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if err != nil {
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if EngineConfig.LogLang == "zh" {
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log.Error("接收流路径(流唯一标识)格式错误,必须形如 live/test ", zap.String("流路径", streamPath), zap.Error(err))
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} else {
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log.Error("receive streamPath wrong format", zap.String("streamPath", streamPath), zap.Error(err))
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}
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return err
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}
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io.Args = u.Query()
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wt := time.Second * 5
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var iSub ISubscriber
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var iPub IPublisher
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var isSubscribe bool
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if iSub, isSubscribe = specific.(ISubscriber); isSubscribe {
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wt = iSub.GetSubscriber().Config.WaitTimeout
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} else {
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iPub = specific.(IPublisher)
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}
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s, create := findOrCreateStream(u.Path, wt)
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if s == nil {
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return ErrBadStreamName
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}
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if io.Stream == nil { //初次
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if io.Type == "" {
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io.Type = reflect.TypeOf(specific).Elem().Name()
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}
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logFeilds := []zapcore.Field{zap.String("type", io.Type)}
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if io.ID != "" {
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logFeilds = append(logFeilds, zap.String("ID", io.ID))
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}
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if io.Logger == nil {
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io.Logger = s.With(logFeilds...)
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} else {
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io.Logger = io.Logger.With(logFeilds...)
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}
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}
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io.Stream = s
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io.Spesific = specific
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io.StartTime = time.Now()
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if io.Context == nil {
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io.Debug("create context")
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io.SetParentCtx(Engine.Context)
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} else if io.IsClosed() {
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io.Debug("recreate context")
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io.SetParentCtx(Engine.Context)
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} else {
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io.Debug("warp context")
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io.SetParentCtx(io.Context)
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}
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defer func() {
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if err == nil {
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specific.OnEvent(specific)
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}
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}()
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if !isSubscribe {
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puber := iPub.GetPublisher()
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conf := puber.Config
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if io.Args.Get("bufferTime") != "" {
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conf.BufferTime, _ = time.ParseDuration(io.Args.Get("bufferTime"))
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}
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io.Info("publish", zap.String("ptr", fmt.Sprintf("%p", iPub)))
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s.pubLocker.Lock()
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defer s.pubLocker.Unlock()
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if _, isPuller := specific.(IPuller); config.Global.EnableAuth && !isPuller {
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onAuthPub := OnAuthPub
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if auth, ok := specific.(AuthPub); ok {
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onAuthPub = auth.OnAuth
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}
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if onAuthPub != nil {
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authPromise := util.NewPromise(iPub)
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if err = onAuthPub(authPromise); err == nil {
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err = authPromise.Await()
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}
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if err != nil {
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return err
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}
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} else if conf.Key != "" {
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if !io.auth(conf.Key, io.Args.Get(conf.SecretArgName), io.Args.Get(conf.ExpireArgName)) {
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return ErrAuth
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}
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}
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}
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if promise := util.NewPromise(iPub); s.Receive(promise) {
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err = promise.Await()
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return err
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}
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} else {
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conf := iSub.GetSubscriber().Config
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io.Info("subscribe")
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if create {
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EventBus <- InvitePublish{CreateEvent(s.Path)} // 通知发布者按需拉流
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}
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if config.Global.EnableAuth && !conf.Internal {
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onAuthSub := OnAuthSub
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if auth, ok := specific.(AuthSub); ok {
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onAuthSub = auth.OnAuth
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}
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if onAuthSub != nil {
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authPromise := util.NewPromise(iSub)
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if err = onAuthSub(authPromise); err == nil {
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err = authPromise.Await()
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}
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if err != nil {
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return err
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}
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} else if conf.Key != "" {
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if !io.auth(conf.Key, io.Args.Get(conf.SecretArgName), io.Args.Get(conf.ExpireArgName)) {
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return ErrAuth
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}
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}
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}
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if promise := util.NewPromise(iSub); s.Receive(promise) {
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err = promise.Await()
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return err
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}
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}
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return ErrStreamIsClosed
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}
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// ClientIO 作为Client角色(Puller，Pusher)的公共结构体
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type ClientIO[C ClientConfig] struct {
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Config *C
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StreamPath string // 本地流标识
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RemoteURL string // 远程服务器地址（用于推拉）
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ReConnectCount int //重连次数
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}
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func (c *ClientIO[C]) init(streamPath string, url string, conf *C) {
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c.Config = conf
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c.StreamPath = streamPath
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c.RemoteURL = url
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}
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