fix: alias with args

alias.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"google.golang.org/protobuf/types/known/emptypb"
+	"gorm.io/gorm"
 	"m7s.live/v5/pb"
 )
 
@@ -15,6 +16,7 @@ type AliasStream struct {
 	AutoRemove bool
 	StreamPath string
 	Alias      string     `gorm:"primarykey"`
+	Args       url.Values `gorm:"-"`
 }
 
 func (a *AliasStream) GetKey() string {
@@ -24,6 +26,7 @@ func (a *AliasStream) GetKey() string {
 // StreamAliasDB 用于存储流别名的数据库模型
 type StreamAliasDB struct {
 	AliasStream
+	ArgsString string    `gorm:"column:args;type:text"`
 	CreatedAt  time.Time `yaml:"-"`
 	UpdatedAt  time.Time `yaml:"-"`
 }
@@ -32,6 +35,40 @@ func (StreamAliasDB) TableName() string {
 	return "stream_alias"
 }
 
+// BeforeSave 保存前序列化查询参数
+func (db *StreamAliasDB) BeforeSave(tx *gorm.DB) error {
+	if len(db.Args) > 0 {
+		db.ArgsString = db.Args.Encode()
+	} else {
+		db.ArgsString = ""
+	}
+	return nil
+}
+
+// BeforeCreate 创建前序列化查询参数
+func (db *StreamAliasDB) BeforeCreate(tx *gorm.DB) error {
+	return db.BeforeSave(tx)
+}
+
+// BeforeUpdate 更新前序列化查询参数
+func (db *StreamAliasDB) BeforeUpdate(tx *gorm.DB) error {
+	return db.BeforeSave(tx)
+}
+
+// AfterFind 查询后反序列化查询参数
+func (db *StreamAliasDB) AfterFind(tx *gorm.DB) error {
+	if db.ArgsString != "" {
+		var err error
+		db.Args, err = url.ParseQuery(db.ArgsString)
+		if err != nil {
+			db.Args = nil
+		}
+	} else {
+		db.Args = nil
+	}
+	return nil
+}
+
 func (s *Server) initStreamAlias() {
 	if s.DB == nil {
 		return
@@ -75,13 +112,15 @@ func (s *Server) SetStreamAlias(ctx context.Context, req *pb.SetStreamAliasReque
 				return
 			}
 			req.StreamPath = strings.TrimPrefix(u.Path, "/")
+			queryParams := u.Query()
 			publisher, canReplace := s.Streams.Get(req.StreamPath)
 			if !canReplace {
-				defer s.OnSubscribe(req.StreamPath, u.Query())
+				defer s.OnSubscribe(req.StreamPath, queryParams)
 			}
 			if aliasInfo, ok := s.AliasStreams.Get(req.Alias); ok { //modify alias
 				oldStreamPath := aliasInfo.StreamPath
 				aliasInfo.AutoRemove = req.AutoRemove
+				aliasInfo.Args = queryParams
 				if aliasInfo.StreamPath != req.StreamPath {
 					aliasInfo.StreamPath = req.StreamPath
 					if canReplace {
@@ -96,9 +135,10 @@ func (s *Server) SetStreamAlias(ctx context.Context, req *pb.SetStreamAliasReque
 				}
 				// 更新数据库中的别名
 				if s.DB != nil {
-					s.DB.Where("alias = ?", req.Alias).Assign(aliasInfo).FirstOrCreate(&StreamAliasDB{
+					dbAlias := &StreamAliasDB{
 						AliasStream: *aliasInfo,
-					})
+					}
+					s.DB.Where("alias = ?", req.Alias).Save(dbAlias)
 				}
 				s.Info("modify alias", "alias", req.Alias, "oldStreamPath", oldStreamPath, "streamPath", req.StreamPath, "replace", ok && canReplace)
 			} else { // create alias
@@ -106,6 +146,7 @@ func (s *Server) SetStreamAlias(ctx context.Context, req *pb.SetStreamAliasReque
 					AutoRemove: req.AutoRemove,
 					StreamPath: req.StreamPath,
 					Alias:      req.Alias,
+					Args:       queryParams,
 				}
 				var pubId uint32
 				s.AliasStreams.Add(&aliasInfo)
@@ -125,9 +166,10 @@ func (s *Server) SetStreamAlias(ctx context.Context, req *pb.SetStreamAliasReque
 				}
 				// 保存到数据库
 				if s.DB != nil {
-					s.DB.Create(&StreamAliasDB{
+					dbAlias := &StreamAliasDB{
 						AliasStream: aliasInfo,
-					})
+					}
+					s.DB.Create(dbAlias)
 				}
 				s.Info("add alias", "alias", req.Alias, "streamPath", req.StreamPath, "replace", ok && canReplace, "pub", pubId)
 			}
@@ -143,15 +185,20 @@ func (s *Server) SetStreamAlias(ctx context.Context, req *pb.SetStreamAliasReque
 					if publisher, hasTarget := s.Streams.Get(req.Alias); hasTarget { // restore stream
 						aliasStream.TransferSubscribers(publisher)
 					} else {
-						var args url.Values
+						// 优先使用别名保存的查询参数
+						args := aliasStream.Args
+						if len(args) == 0 {
+							// 如果没有保存的查询参数，则从订阅者中获取
 							for sub := range aliasStream.Publisher.SubscriberRange {
 								if sub.StreamPath == req.Alias {
 									aliasStream.Publisher.RemoveSubscriber(sub)
 									s.Waiting.Wait(sub)
 									args = sub.Args
+									break
 								}
 							}
-						if args != nil {
+						}
+						if len(args) > 0 {
 							s.OnSubscribe(req.Alias, args)
 						}
 					}
@@ -218,7 +265,21 @@ func (s *Subscriber) processAliasOnStart() (hasInvited bool, done bool) {
 			done = true
 			return
 		} else {
-			server.OnSubscribe(alias.StreamPath, s.Args)
+			// 合并参数：先使用别名保存的参数，然后用订阅者传入的参数覆盖同名参数
+			args := make(url.Values)
+			// 先复制别名保存的参数
+			if alias.Args != nil {
+				for k, v := range alias.Args {
+					args[k] = append([]string(nil), v...)
+				}
+			}
+			// 用订阅者传入的参数覆盖同名参数
+			if s.Args != nil {
+				for k, v := range s.Args {
+					args[k] = append([]string(nil), v...)
+				}
+			}
+			server.OnSubscribe(alias.StreamPath, args)
 			hasInvited = true
 		}
 	} else {
@@ -227,12 +288,14 @@ func (s *Subscriber) processAliasOnStart() (hasInvited bool, done bool) {
 				as := AliasStream{
 					StreamPath: streamPath,
 					Alias:      s.StreamPath,
+					Args:       s.Args,
 				}
 				server.AliasStreams.Set(&as)
 				if server.DB != nil {
-					server.DB.Where("alias = ?", s.StreamPath).Assign(as).FirstOrCreate(&StreamAliasDB{
+					dbAlias := &StreamAliasDB{
 						AliasStream: as,
-					})
+					}
+					server.DB.Where("alias = ?", s.StreamPath).Save(dbAlias)
 				}
 				if publisher, ok := server.Streams.Get(streamPath); ok {
 					publisher.AddSubscriber(s)