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Copy pathplugin.go
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Copy pathplugin.go
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351 lines (329 loc) · 9.09 KB
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package engine
import (
"context"
"errors"
"fmt"
"net/http"
"os"
"path/filepath"
"reflect"
"runtime"
"strings"
"sync"
"time"
"unsafe"
"github.com/mcuadros/go-defaults"
"go.uber.org/zap"
"gopkg.in/yaml.v3"
"m7s.live/engine/v4/config"
"m7s.live/engine/v4/log"
"m7s.live/engine/v4/util"
)
// InstallPlugin 安装插件，传入插件配置生成插件信息对象
func InstallPlugin(config config.Plugin, options ...any) *Plugin {
defaults.SetDefaults(config)
t := reflect.TypeOf(config).Elem()
name := strings.TrimSuffix(t.Name(), "Config")
plugin := &Plugin{
Name: name,
Config: config,
}
for _, v := range options {
switch v := v.(type) {
case DefaultYaml:
plugin.defaultYaml = v
case string:
name = v
plugin.Name = name
}
}
_, pluginFilePath, _, _ := runtime.Caller(1)
configDir := filepath.Dir(pluginFilePath)
if parts := strings.Split(configDir, "@"); len(parts) > 1 {
plugin.Version = util.LastElement(parts)
} else {
plugin.Version = pluginFilePath
}
if _, ok := Plugins[name]; ok {
return nil
}
switch v := config.(type) {
case *GlobalConfig:
v.InitDefaultHttp()
default:
Plugins[name] = plugin
plugins = append(plugins, plugin)
}
return plugin
}
type FirstConfig *config.Config
type UpdateConfig *config.Config
type DefaultYaml string
// Plugin 插件信息
type Plugin struct {
context.Context `json:"-" yaml:"-"`
context.CancelFunc `json:"-" yaml:"-"`
Name string //插件名称
Config config.Plugin `json:"-" yaml:"-"` //类型化的插件配置
Version string //插件版本
RawConfig config.Config //最终合并后的配置的map形式方便查询
defaultYaml DefaultYaml //默认配置
*log.Logger `json:"-" yaml:"-"`
saveTimer *time.Timer //用于保存的时候的延迟，防抖
Disabled bool
}
func (opt *Plugin) logHandler(pattern string, handler http.Handler) http.Handler {
return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
opt.Debug("visit", zap.String("path", r.URL.String()), zap.String("remote", r.RemoteAddr))
name := strings.ToLower(opt.Name)
r.URL.Path = strings.TrimPrefix(r.URL.Path, "/"+name)
handler.ServeHTTP(rw, r)
})
}
func (opt *Plugin) handle(pattern string, handler http.Handler) {
if opt == nil {
return
}
conf, ok := opt.Config.(config.HTTPConfig)
if !strings.HasPrefix(pattern, "/") {
pattern = "/" + pattern
}
if ok {
opt.Debug("http handle added", zap.String("pattern", pattern))
conf.Handle(pattern, opt.logHandler(pattern, handler))
}
if opt != Engine {
pattern = "/" + strings.ToLower(opt.Name) + pattern
opt.Debug("http handle added to engine", zap.String("pattern", pattern))
EngineConfig.Handle(pattern, opt.logHandler(pattern, handler))
}
apiList = append(apiList, pattern)
}
// 读取独立配置合并入总配置中
func (opt *Plugin) assign() {
f, err := os.Open(opt.settingPath())
defer f.Close()
if err == nil {
var modifyConfig map[string]any
err = yaml.NewDecoder(f).Decode(&modifyConfig)
if err != nil {
panic(err)
}
opt.RawConfig.ParseModifyFile(modifyConfig)
}
opt.registerHandler()
if opt != Engine {
opt.run()
}
}
func (opt *Plugin) run() {
opt.Context, opt.CancelFunc = context.WithCancel(Engine)
opt.Config.OnEvent(FirstConfig(&opt.RawConfig))
opt.Debug("config", zap.Any("config", opt.Config))
if conf, ok := opt.Config.(config.HTTPConfig); ok {
go conf.Listen(opt)
}
if conf, ok := opt.Config.(config.TCPConfig); ok {
go conf.ListenTCP(opt, opt.Config.(config.TCPPlugin))
}
}
// Update 热更新配置
func (opt *Plugin) Update(conf *config.Config) {
opt.Config.OnEvent(UpdateConfig(conf))
}
func (opt *Plugin) registerHandler() {
t := reflect.TypeOf(opt.Config)
v := reflect.ValueOf(opt.Config)
// 注册http响应
for i, j := 0, t.NumMethod(); i < j; i++ {
name := t.Method(i).Name
if name == "ServeHTTP" {
continue
}
switch handler := v.Method(i).Interface().(type) {
case func(http.ResponseWriter, *http.Request):
patten := strings.ToLower(strings.ReplaceAll(name, "_", "/"))
opt.handle(patten, http.HandlerFunc(handler))
}
}
if rootHandler, ok := opt.Config.(http.Handler); ok {
opt.handle("/", rootHandler)
}
}
func (opt *Plugin) settingPath() string {
return filepath.Join(SettingDir, strings.ToLower(opt.Name)+".yaml")
}
func (opt *Plugin) Save() error {
if opt.saveTimer == nil {
var lock sync.Mutex
opt.saveTimer = time.AfterFunc(time.Second, func() {
lock.Lock()
defer lock.Unlock()
if opt.RawConfig.Modify == nil {
os.Remove(opt.settingPath())
return
}
file, err := os.OpenFile(opt.settingPath(), os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0666)
if err == nil {
defer file.Close()
err = yaml.NewEncoder(file).Encode(opt.RawConfig.Modify)
}
if err == nil {
opt.Info("config saved")
}
})
} else {
opt.saveTimer.Reset(time.Second)
}
return nil
}
func (opt *Plugin) AssignPubConfig(puber *Publisher) {
if puber.Config == nil {
conf, ok := opt.Config.(config.PublishConfig)
if !ok {
conf = EngineConfig
}
copyConfig := conf.GetPublishConfig()
puber.Config = ©Config
}
}
func (opt *Plugin) Publish(streamPath string, pub IPublisher) error {
puber := pub.GetPublisher()
if puber == nil {
if EngineConfig.LogLang == "zh" {
return errors.New("不是发布者")
} else {
return errors.New("not publisher")
}
}
opt.AssignPubConfig(puber)
return pub.Publish(streamPath, pub)
}
var ErrStreamNotExist = errors.New("stream not exist")
// SubscribeExist 订阅已经存在的流
func (opt *Plugin) SubscribeExist(streamPath string, sub ISubscriber) error {
opt.Info("subscribe exsit", zap.String("path", streamPath))
path, _, _ := strings.Cut(streamPath, "?")
if !Streams.Has(path) {
opt.Warn("stream not exist", zap.String("path", streamPath))
return ErrStreamNotExist
}
return opt.Subscribe(streamPath, sub)
}
func (opt *Plugin) AssignSubConfig(suber *Subscriber) {
if suber.Config == nil {
conf, ok := opt.Config.(config.SubscribeConfig)
if !ok {
conf = EngineConfig
}
copyConfig := *conf.GetSubscribeConfig()
suber.Config = ©Config
}
if suber.ID == "" {
suber.ID = fmt.Sprintf("%d", uintptr(unsafe.Pointer(suber)))
}
}
// Subscribe 订阅一个流，如果流不存在则创建一个等待流
func (opt *Plugin) Subscribe(streamPath string, sub ISubscriber) error {
suber := sub.GetSubscriber()
if suber == nil {
if EngineConfig.LogLang == "zh" {
return errors.New("不是订阅者")
} else {
return errors.New("not subscriber")
}
}
opt.AssignSubConfig(suber)
return sub.Subscribe(streamPath, sub)
}
// SubscribeBlock 阻塞订阅一个流，直到订阅结束
func (opt *Plugin) SubscribeBlock(streamPath string, sub ISubscriber, t byte) (err error) {
if err = opt.Subscribe(streamPath, sub); err == nil {
sub.PlayBlock(t)
}
return
}
var ErrNoPullConfig = errors.New("no pull config")
var Pullers sync.Map
func (opt *Plugin) Pull(streamPath string, url string, puller IPuller, save int) (err error) {
conf, ok := opt.Config.(config.PullConfig)
if !ok {
return ErrNoPullConfig
}
pullConf := conf.GetPullConfig()
if save < 2 {
zurl := zap.String("url", url)
zpath := zap.String("stream", streamPath)
opt.Info("pull", zpath, zurl)
puller.init(streamPath, url, pullConf)
opt.AssignPubConfig(puller.GetPublisher())
puller.SetLogger(opt.Logger.With(zpath, zurl))
go puller.startPull(puller)
}
switch save {
case 1:
pullConf.PullOnStartLocker.Lock()
defer pullConf.PullOnStartLocker.Unlock()
m := map[string]string{streamPath: url}
for id := range pullConf.PullOnStart {
m[id] = pullConf.PullOnStart[id]
}
m[streamPath] = url
opt.RawConfig.ParseModifyFile(map[string]any{
"pull": map[string]any{
"pullonstart": m,
},
})
case 2:
pullConf.PullOnSubLocker.Lock()
defer pullConf.PullOnSubLocker.Unlock()
m := map[string]string{streamPath: url}
for id := range pullConf.PullOnSub {
m[id] = pullConf.PullOnSub[id]
}
m[streamPath] = url
if pullConf.PullOnSub == nil {
pullConf.PullOnSub = make(map[string]string)
}
pullConf.PullOnSub[streamPath] = url
opt.RawConfig.ParseModifyFile(map[string]any{
"pull": map[string]any{
"pullonsub": m,
},
})
}
if save > 0 {
if err = opt.Save(); err != nil {
opt.Error("save faild", zap.Error(err))
}
}
return
}
var ErrNoPushConfig = errors.New("no push config")
var Pushers sync.Map
func (opt *Plugin) Push(streamPath string, url string, pusher IPusher, save bool) (err error) {
zp, zu := zap.String("stream", streamPath), zap.String("url", url)
opt.Info("push", zp, zu)
defer func() {
if err != nil {
opt.Error("push faild", zap.Error(err))
}
}()
conf, ok := opt.Config.(config.PushConfig)
if !ok {
return ErrNoPushConfig
}
pushConfig := conf.GetPushConfig()
pusher.init(streamPath, url, pushConfig)
pusher.SetLogger(opt.Logger.With(zp, zu))
opt.AssignSubConfig(pusher.GetSubscriber())
go pusher.startPush(pusher)
if save {
pushConfig.AddPush(url, streamPath)
opt.RawConfig.Get("push").Get("pushlist").Modify = pushConfig.PushList
if err = opt.Save(); err != nil {
opt.Error("save faild", zap.Error(err))
}
}
return
}
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