1007 lines
30 KiB
Go
1007 lines
30 KiB
Go
package mtprotoedge
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import (
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"context"
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"errors"
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"fmt"
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"sync"
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"time"
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"go.uber.org/zap"
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"github.com/gotd/td/bin"
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"github.com/gotd/td/proto"
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)
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// ErrSessionNotFound 表示目标 session 当前无活跃连接。
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var ErrSessionNotFound = errors.New("session not found")
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// ErrSessionAmbiguous 表示仅用 session_id 无法唯一定位连接。
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var ErrSessionAmbiguous = errors.New("session id is shared by multiple auth keys")
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const (
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maxPendingPushesPerSession = 32
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// pendingPushMaxAge：session 注册后迟迟不调 updates.getState（receivesUpdates 恒 false）时，
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// 其暂存的主动推送最长保留时长。超过即丢整批并不再囤——正常 TDesktop 登录后秒级就会
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// getState 建立同步基线；长期不 ready 多为异常/对抗连接。丢弃不丢消息：getDifference 以
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// user_update_events durable log 兜底补齐。
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pendingPushMaxAge = 60 * time.Second
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)
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type queuedPush struct {
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t proto.MessageType
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msg bin.Encoder
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at time.Time
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}
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type sessionKey struct {
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authKeyID [8]byte
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sessionID int64
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}
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// SessionLifecycleObserver receives active connection lifecycle events.
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type SessionLifecycleObserver interface {
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SessionOffline(rawAuthKeyID [8]byte, sessionID, userID int64, lastForUser bool)
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}
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// SessionManager 是活跃连接注册表，支持按 session / auth-key / user 查找并主动 push。
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//
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// 它管理运行态的在线连接，与持久化的 store.SessionStore 互补：后者记录 session 数据，
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// 前者持有可发送的活跃连接。所有方法并发安全。
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type SessionManager struct {
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mu sync.RWMutex
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bySession map[sessionKey]*Conn
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bySessionID map[int64]map[[8]byte]*Conn // sessionID → raw authKeyID → Conn，用于兼容旧 API 的唯一性检查
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byAuthKey map[[8]byte]map[int64]*Conn // raw authKeyID → sessionID → Conn
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byUser map[int64]map[sessionKey]*Conn
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byChannel map[int64]map[sessionKey]int64 // channelID → session → userID，用于频道 active-viewer 临时推送
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bySessionChannels map[sessionKey]map[int64]struct{}
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byMemberChannel map[int64]map[sessionKey]int64 // channelID → session → userID，用于已上线成员持久 update 推送
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bySessionMembers map[sessionKey]map[int64]struct{}
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pending map[sessionKey][]queuedPush // updates-ready 前暂存的主动推送
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lifecycle SessionLifecycleObserver
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log *zap.Logger
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}
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// NewSessionManager 创建空的连接注册表。
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func NewSessionManager(log *zap.Logger) *SessionManager {
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if log == nil {
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log = zap.NewNop()
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}
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return &SessionManager{
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bySession: make(map[sessionKey]*Conn),
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bySessionID: make(map[int64]map[[8]byte]*Conn),
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byAuthKey: make(map[[8]byte]map[int64]*Conn),
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byUser: make(map[int64]map[sessionKey]*Conn),
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byChannel: make(map[int64]map[sessionKey]int64),
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bySessionChannels: make(map[sessionKey]map[int64]struct{}),
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byMemberChannel: make(map[int64]map[sessionKey]int64),
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bySessionMembers: make(map[sessionKey]map[int64]struct{}),
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pending: make(map[sessionKey][]queuedPush),
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log: log,
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}
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}
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// SetLifecycleObserver installs a best-effort active session lifecycle observer.
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func (m *SessionManager) SetLifecycleObserver(observer SessionLifecycleObserver) {
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m.mu.Lock()
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m.lifecycle = observer
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m.mu.Unlock()
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}
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// Register 注册一个活跃连接。若同 raw auth_key_id + session_id 已存在（重连），旧连接被替换并移除索引。
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func (m *SessionManager) Register(c *Conn) {
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m.mu.Lock()
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key := connSessionKey(c)
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var replaced *Conn
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if old, ok := m.bySession[key]; ok && old != c {
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replaced = old
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m.removeLocked(old, false)
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}
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m.bySession[key] = c
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addSessionIDIndex(m.bySessionID, c.sessionID, c.authKeyID, c)
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addConnIndex(m.byAuthKey, c.authKeyID, c.sessionID, c)
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if uid := c.userID.Load(); uid != 0 {
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c.userIDResolved.Store(true)
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addUserIndex(m.byUser, uid, key, c)
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}
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m.log.Debug("Session registered",
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zap.String("auth_key_id", sessionKeyLog(key.authKeyID)),
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zap.Int64("session_id", c.sessionID),
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zap.Int("online", len(m.bySession)),
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)
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m.mu.Unlock()
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if replaced != nil {
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replaced.Close()
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}
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}
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// Unregister 注销一个连接（仅当它仍是当前注册的同一对象，避免误删重连后的新连接）。
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func (m *SessionManager) Unregister(c *Conn) {
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m.mu.Lock()
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var (
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observer SessionLifecycleObserver
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offlineUser int64
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lastForUser bool
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)
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if cur, ok := m.bySession[connSessionKey(c)]; ok && cur == c {
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offlineUser = m.removeLocked(c, true)
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if offlineUser != 0 {
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lastForUser = len(m.byUser[offlineUser]) == 0
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observer = m.lifecycle
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}
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m.log.Debug("Session unregistered",
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zap.String("auth_key_id", sessionKeyLog(c.authKeyID)),
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zap.Int64("session_id", c.sessionID),
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zap.Int("online", len(m.bySession)),
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)
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}
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m.mu.Unlock()
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if observer != nil && offlineUser != 0 {
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observer.SessionOffline(c.authKeyID, c.sessionID, offlineUser, lastForUser)
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}
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}
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// DestroySession 移除指定 session 的运行态索引，供 MTProto destroy_session 使用。
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func (m *SessionManager) DestroySession(sessionID int64) bool {
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m.mu.Lock()
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c, key, ok, ambiguous := m.uniqueSessionLocked(sessionID)
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if ambiguous || !ok {
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if !ambiguous {
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m.dropPendingBySessionLocked(sessionID)
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}
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m.mu.Unlock()
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return false
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}
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offlineUser := m.removeLocked(c, true)
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lastForUser := offlineUser != 0 && len(m.byUser[offlineUser]) == 0
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observer := m.lifecycle
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m.log.Debug("Session destroyed",
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zap.String("auth_key_id", sessionKeyLog(key.authKeyID)),
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zap.Int64("session_id", sessionID),
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zap.Int("online", len(m.bySession)),
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)
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m.mu.Unlock()
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c.Close()
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if observer != nil && offlineUser != 0 {
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observer.SessionOffline(key.authKeyID, sessionID, offlineUser, lastForUser)
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}
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return true
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}
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// DestroySessionForAuthKey 精确移除某个 raw auth_key_id 下的 session。
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func (m *SessionManager) DestroySessionForAuthKey(authKeyID [8]byte, sessionID int64) bool {
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m.mu.Lock()
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key := sessionKey{authKeyID: authKeyID, sessionID: sessionID}
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c, ok := m.bySession[key]
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if !ok {
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delete(m.pending, key)
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m.mu.Unlock()
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return false
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}
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offlineUser := m.removeLocked(c, true)
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lastForUser := offlineUser != 0 && len(m.byUser[offlineUser]) == 0
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observer := m.lifecycle
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m.log.Debug("Session destroyed",
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zap.String("auth_key_id", sessionKeyLog(authKeyID)),
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zap.Int64("session_id", sessionID),
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zap.Int("online", len(m.bySession)),
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)
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m.mu.Unlock()
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c.Close()
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if observer != nil && offlineUser != 0 {
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observer.SessionOffline(authKeyID, sessionID, offlineUser, lastForUser)
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}
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return true
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}
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// BindUser 缓存 session 的授权用户。userID=0 表示当前 auth_key 已确认未登录。
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// 登录后绑定非 0 userID，使其可经 PushToUser 收到推送。
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func (m *SessionManager) BindUser(sessionID, userID int64) {
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m.mu.Lock()
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c, key, ok, ambiguous := m.uniqueSessionLocked(sessionID)
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if ambiguous || !ok {
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if ambiguous {
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m.log.Warn("Skip BindUser for ambiguous session_id", zap.Int64("session_id", sessionID))
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}
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m.mu.Unlock()
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return
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}
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m.bindUserLocked(c, key, userID)
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m.mu.Unlock()
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}
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// BindUserForAuthKey 缓存指定 raw auth_key_id + session_id 的授权用户。
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func (m *SessionManager) BindUserForAuthKey(authKeyID [8]byte, sessionID, userID int64) {
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m.mu.Lock()
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defer m.mu.Unlock()
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key := sessionKey{authKeyID: authKeyID, sessionID: sessionID}
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c, ok := m.bySession[key]
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if !ok {
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return
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}
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m.bindUserLocked(c, key, userID)
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}
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func (m *SessionManager) bindUserLocked(c *Conn, key sessionKey, userID int64) {
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if old := c.userID.Swap(userID); old != 0 {
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removeUserIndex(m.byUser, old, key)
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if old != userID {
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m.clearChannelInterestsLocked(key)
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m.clearChannelMembershipsLocked(key)
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}
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}
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c.userIDResolved.Store(true)
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if userID != 0 {
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addUserIndex(m.byUser, userID, key, c)
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} else {
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m.clearChannelInterestsLocked(key)
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m.clearChannelMembershipsLocked(key)
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}
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}
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// UserID 返回 session 当前缓存的登录用户 id。未绑定或离线时 ok=false。
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func (m *SessionManager) UserID(sessionID int64) (int64, bool) {
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m.mu.RLock()
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c, _, ok, ambiguous := m.uniqueSessionLocked(sessionID)
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m.mu.RUnlock()
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if ambiguous || !ok {
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return 0, false
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}
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userID := c.userID.Load()
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if userID == 0 {
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return 0, false
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}
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return userID, true
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}
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// UserIDForAuthKey 返回指定 raw auth_key_id + session_id 当前缓存的登录用户 id。
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func (m *SessionManager) UserIDForAuthKey(authKeyID [8]byte, sessionID int64) (int64, bool) {
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m.mu.RLock()
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c, ok := m.bySession[sessionKey{authKeyID: authKeyID, sessionID: sessionID}]
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m.mu.RUnlock()
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if !ok {
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return 0, false
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}
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userID := c.userID.Load()
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if userID == 0 {
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return 0, false
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}
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return userID, true
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}
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// UserIDResolved 返回 session 的 user_id 授权状态是否已经查过。
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// resolved=true 且 userID=0 表示该 session 当前未登录。
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func (m *SessionManager) UserIDResolved(sessionID int64) (int64, bool) {
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m.mu.RLock()
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c, _, ok, ambiguous := m.uniqueSessionLocked(sessionID)
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m.mu.RUnlock()
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if ambiguous || !ok {
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return 0, false
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}
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return c.UserIDResolved()
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}
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// UserIDResolvedForAuthKey 返回指定 raw auth_key_id + session_id 的 user_id 缓存状态。
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func (m *SessionManager) UserIDResolvedForAuthKey(authKeyID [8]byte, sessionID int64) (int64, bool) {
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m.mu.RLock()
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c, ok := m.bySession[sessionKey{authKeyID: authKeyID, sessionID: sessionID}]
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m.mu.RUnlock()
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if !ok {
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return 0, false
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}
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return c.UserIDResolved()
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}
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// BindAuthKey 缓存业务视角 auth_key_id（temp auth_key 解析后的 perm auth_key）。
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func (m *SessionManager) BindAuthKey(sessionID int64, authKeyID [8]byte) {
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m.mu.Lock()
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c, key, ok, ambiguous := m.uniqueSessionLocked(sessionID)
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if ambiguous || !ok {
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if ambiguous {
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m.log.Warn("Skip BindAuthKey for ambiguous session_id", zap.Int64("session_id", sessionID))
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}
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m.mu.Unlock()
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return
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}
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m.bindAuthKeyLocked(c, key, authKeyID)
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m.mu.Unlock()
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}
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// BindAuthKeyForSession 缓存指定 raw auth_key_id + session_id 的业务 auth_key_id。
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func (m *SessionManager) BindAuthKeyForSession(rawAuthKeyID [8]byte, sessionID int64, authKeyID [8]byte) {
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m.mu.Lock()
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defer m.mu.Unlock()
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key := sessionKey{authKeyID: rawAuthKeyID, sessionID: sessionID}
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c, ok := m.bySession[key]
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if !ok {
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return
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}
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m.bindAuthKeyLocked(c, key, authKeyID)
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}
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func (m *SessionManager) bindAuthKeyLocked(c *Conn, key sessionKey, authKeyID [8]byte) {
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oldAuthKeyID, resolved := c.BusinessAuthKeyID()
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changed := !resolved || oldAuthKeyID != authKeyID
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oldUserID := c.userID.Load()
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c.SetBusinessAuthKeyID(authKeyID)
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if changed {
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if oldUserID != 0 {
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removeUserIndex(m.byUser, oldUserID, key)
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}
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m.clearChannelInterestsLocked(key)
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m.clearChannelMembershipsLocked(key)
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c.userID.Store(0)
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c.userIDResolved.Store(false)
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}
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}
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// AuthKeyID 返回 session 缓存的业务视角 auth_key_id。
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// ok=false 表示该连接尚未完成 temp→perm 解析。
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func (m *SessionManager) AuthKeyID(sessionID int64) ([8]byte, bool) {
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m.mu.RLock()
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c, _, ok, ambiguous := m.uniqueSessionLocked(sessionID)
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m.mu.RUnlock()
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if ambiguous || !ok {
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return [8]byte{}, false
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}
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return c.BusinessAuthKeyID()
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}
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// AuthKeyIDForSession 返回指定 raw auth_key_id + session_id 缓存的业务 auth_key_id。
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func (m *SessionManager) AuthKeyIDForSession(rawAuthKeyID [8]byte, sessionID int64) ([8]byte, bool) {
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m.mu.RLock()
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c, ok := m.bySession[sessionKey{authKeyID: rawAuthKeyID, sessionID: sessionID}]
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m.mu.RUnlock()
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if !ok {
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return [8]byte{}, false
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}
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return c.BusinessAuthKeyID()
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}
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// UnbindAuthKey 清理某业务 auth_key 下所有活跃连接的登录用户缓存。
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func (m *SessionManager) UnbindAuthKey(authKeyID [8]byte) int {
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m.mu.Lock()
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defer m.mu.Unlock()
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count := 0
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for key, c := range m.bySession {
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if !connUsesBusinessAuthKey(c, authKeyID) {
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continue
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}
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if old := c.userID.Swap(0); old != 0 {
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removeUserIndex(m.byUser, old, key)
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}
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m.clearChannelInterestsLocked(key)
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m.clearChannelMembershipsLocked(key)
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c.userIDResolved.Store(true)
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count++
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}
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return count
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}
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// SetReceivesUpdates 标记 session 是否已完成 updates 同步入口。
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//
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// TDesktop 登录后会先调用 updates.getState/getDifference 建立本地同步基线。
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// 在此之前收到的主动 updates 先暂存，待 session 可接收后再异步下发。
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func (m *SessionManager) SetReceivesUpdates(sessionID int64, receives bool) {
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m.mu.Lock()
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c, key, ok, ambiguous := m.uniqueSessionLocked(sessionID)
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if ambiguous || !ok {
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if ambiguous {
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m.log.Warn("Skip SetReceivesUpdates for ambiguous session_id", zap.Int64("session_id", sessionID))
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}
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m.mu.Unlock()
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return
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}
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c.receivesUpdates.Store(receives)
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if !receives {
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m.clearChannelInterestsLocked(key)
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m.clearChannelMembershipsLocked(key)
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}
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pending := m.takePendingLocked(key, receives)
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m.mu.Unlock()
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if len(pending) > 0 {
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go m.flushPending(key, pending)
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}
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}
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// SetReceivesUpdatesForAuthKey 标记指定 raw auth_key_id + session_id 是否接收主动 updates。
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func (m *SessionManager) SetReceivesUpdatesForAuthKey(authKeyID [8]byte, sessionID int64, receives bool) {
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m.mu.Lock()
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key := sessionKey{authKeyID: authKeyID, sessionID: sessionID}
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c, ok := m.bySession[key]
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if !ok {
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m.mu.Unlock()
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return
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}
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c.receivesUpdates.Store(receives)
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if !receives {
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m.clearChannelInterestsLocked(key)
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m.clearChannelMembershipsLocked(key)
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}
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pending := m.takePendingLocked(key, receives)
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m.mu.Unlock()
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if len(pending) > 0 {
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go m.flushPending(key, pending)
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}
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}
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// PushToSession 向指定 session 推送一条消息。
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func (m *SessionManager) PushToSession(ctx context.Context, sessionID int64, t proto.MessageType, msg bin.Encoder) error {
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m.mu.Lock()
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c, key, ok, ambiguous := m.uniqueSessionLocked(sessionID)
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if ambiguous {
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m.mu.Unlock()
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return ErrSessionAmbiguous
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}
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if !ok {
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m.mu.Unlock()
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return ErrSessionNotFound
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}
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if !c.receivesUpdates.Load() {
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m.queueLocked(key, t, msg)
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m.mu.Unlock()
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return nil
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}
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m.mu.Unlock()
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return c.Send(ctx, t, msg)
|
||
}
|
||
|
||
// PushToSessionForAuthKey 向指定 raw auth_key_id + session_id 推送一条消息。
|
||
func (m *SessionManager) PushToSessionForAuthKey(ctx context.Context, authKeyID [8]byte, sessionID int64, t proto.MessageType, msg bin.Encoder) error {
|
||
m.mu.Lock()
|
||
key := sessionKey{authKeyID: authKeyID, sessionID: sessionID}
|
||
c, ok := m.bySession[key]
|
||
if !ok {
|
||
m.mu.Unlock()
|
||
return ErrSessionNotFound
|
||
}
|
||
if !c.receivesUpdates.Load() {
|
||
m.queueLocked(key, t, msg)
|
||
m.mu.Unlock()
|
||
return nil
|
||
}
|
||
m.mu.Unlock()
|
||
return c.Send(ctx, t, msg)
|
||
}
|
||
|
||
// PushToUser 向某 user 所有活跃连接推送，返回已发送或已暂存的连接数。
|
||
// 发送在释放锁后进行，避免持锁阻塞于网络 IO。
|
||
func (m *SessionManager) PushToUser(ctx context.Context, userID int64, t proto.MessageType, msg bin.Encoder) (int, error) {
|
||
return m.PushToUserExceptAuthKeySession(ctx, userID, [8]byte{}, 0, t, msg)
|
||
}
|
||
|
||
// PushToUserExceptSession 向某 user 所有活跃连接推送，但跳过指定 session。
|
||
// 未完成 updates 同步入口的 session 会先暂存，等 SetReceivesUpdates(true) 后再发。
|
||
func (m *SessionManager) PushToUserExceptSession(ctx context.Context, userID, excludeSessionID int64, t proto.MessageType, msg bin.Encoder) (int, error) {
|
||
return m.pushToUser(ctx, userID, nil, excludeSessionID, t, msg)
|
||
}
|
||
|
||
// PushToUserExceptAuthKeySession 向某 user 所有活跃连接推送，跳过指定业务 auth_key + session。
|
||
func (m *SessionManager) PushToUserExceptAuthKeySession(ctx context.Context, userID int64, excludeAuthKeyID [8]byte, excludeSessionID int64, t proto.MessageType, msg bin.Encoder) (int, error) {
|
||
return m.pushToUser(ctx, userID, &excludeAuthKeyID, excludeSessionID, t, msg)
|
||
}
|
||
|
||
func (m *SessionManager) pushToUser(ctx context.Context, userID int64, excludeAuthKeyID *[8]byte, excludeSessionID int64, t proto.MessageType, msg bin.Encoder) (int, error) {
|
||
getEncoded := onceEncodedOutbound(msg)
|
||
return m.pushToUserWithSender(ctx, userID, excludeAuthKeyID, excludeSessionID, t, msg, func(c *Conn) error {
|
||
if c.outbound == nil || c.outboundControl == nil {
|
||
return ErrConnClosed
|
||
}
|
||
encoded, err := getEncoded()
|
||
if err != nil {
|
||
return err
|
||
}
|
||
return c.SendEncoded(ctx, t, encoded)
|
||
})
|
||
}
|
||
|
||
func (m *SessionManager) PushToUserExceptSessionBestEffort(ctx context.Context, userID, excludeSessionID int64, t proto.MessageType, msg bin.Encoder, timeout time.Duration) (int, error) {
|
||
return m.pushToUserBestEffort(ctx, userID, nil, excludeSessionID, t, msg, timeout)
|
||
}
|
||
|
||
func (m *SessionManager) PushToUserExceptAuthKeySessionBestEffort(ctx context.Context, userID int64, excludeAuthKeyID [8]byte, excludeSessionID int64, t proto.MessageType, msg bin.Encoder, timeout time.Duration) (int, error) {
|
||
return m.pushToUserBestEffort(ctx, userID, &excludeAuthKeyID, excludeSessionID, t, msg, timeout)
|
||
}
|
||
|
||
func (m *SessionManager) pushToUserBestEffort(ctx context.Context, userID int64, excludeAuthKeyID *[8]byte, excludeSessionID int64, t proto.MessageType, msg bin.Encoder, timeout time.Duration) (int, error) {
|
||
getEncoded := onceEncodedOutbound(msg)
|
||
return m.pushToUserWithSender(ctx, userID, excludeAuthKeyID, excludeSessionID, t, msg, func(c *Conn) error {
|
||
if c.outbound == nil || c.outboundControl == nil {
|
||
return ErrConnClosed
|
||
}
|
||
encoded, err := getEncoded()
|
||
if err != nil {
|
||
return err
|
||
}
|
||
return c.SendBestEffortEncoded(ctx, t, encoded, timeout)
|
||
})
|
||
}
|
||
|
||
func onceEncodedOutbound(msg bin.Encoder) func() (*encodedOutboundMessage, error) {
|
||
var (
|
||
encoded *encodedOutboundMessage
|
||
err error
|
||
)
|
||
return func() (*encodedOutboundMessage, error) {
|
||
if encoded == nil && err == nil {
|
||
encoded, err = encodeOutboundMessage(msg)
|
||
}
|
||
return encoded, err
|
||
}
|
||
}
|
||
|
||
func (m *SessionManager) pushToUserWithSender(ctx context.Context, userID int64, excludeAuthKeyID *[8]byte, excludeSessionID int64, t proto.MessageType, msg bin.Encoder, send func(*Conn) error) (int, error) {
|
||
m.mu.Lock()
|
||
conns := make([]*Conn, 0, len(m.byUser[userID]))
|
||
queued := 0
|
||
for key, c := range m.byUser[userID] {
|
||
if shouldExcludeSession(c, excludeAuthKeyID, excludeSessionID) {
|
||
continue
|
||
}
|
||
if !c.receivesUpdates.Load() {
|
||
m.queueLocked(key, t, msg)
|
||
queued++
|
||
continue
|
||
}
|
||
conns = append(conns, c)
|
||
}
|
||
m.mu.Unlock()
|
||
|
||
var firstErr error
|
||
sent := 0
|
||
for _, c := range conns {
|
||
if err := send(c); err != nil {
|
||
if firstErr == nil {
|
||
firstErr = err
|
||
}
|
||
continue
|
||
}
|
||
sent++
|
||
}
|
||
return sent + queued, firstErr
|
||
}
|
||
|
||
// Online 返回当前活跃连接数。
|
||
func (m *SessionManager) Online() int {
|
||
m.mu.RLock()
|
||
defer m.mu.RUnlock()
|
||
return len(m.bySession)
|
||
}
|
||
|
||
// OnlineUserIDs returns a bounded snapshot of users that currently have active
|
||
// sessions. Callers still need to verify business visibility before pushing.
|
||
func (m *SessionManager) OnlineUserIDs(limit int) []int64 {
|
||
m.mu.RLock()
|
||
defer m.mu.RUnlock()
|
||
if len(m.byUser) == 0 {
|
||
return nil
|
||
}
|
||
capHint := len(m.byUser)
|
||
if limit > 0 && capHint > limit {
|
||
capHint = limit
|
||
}
|
||
ids := make([]int64, 0, capHint)
|
||
for userID, conns := range m.byUser {
|
||
if userID == 0 || len(conns) == 0 {
|
||
continue
|
||
}
|
||
ids = append(ids, userID)
|
||
if limit > 0 && len(ids) >= limit {
|
||
break
|
||
}
|
||
}
|
||
return ids
|
||
}
|
||
|
||
// IsUserOnline returns whether userID has at least one active connection.
|
||
func (m *SessionManager) IsUserOnline(userID int64) bool {
|
||
if userID == 0 {
|
||
return false
|
||
}
|
||
m.mu.RLock()
|
||
defer m.mu.RUnlock()
|
||
return len(m.byUser[userID]) > 0
|
||
}
|
||
|
||
// OnlineUserIDsForCandidates filters an explicit candidate set against the
|
||
// active user index. It avoids exporting or sorting the whole online map.
|
||
func (m *SessionManager) OnlineUserIDsForCandidates(candidateUserIDs []int64, limit int) []int64 {
|
||
if len(candidateUserIDs) == 0 {
|
||
return nil
|
||
}
|
||
m.mu.RLock()
|
||
defer m.mu.RUnlock()
|
||
out := make([]int64, 0, minInt(len(candidateUserIDs), positiveLimitOrLen(limit, len(candidateUserIDs))))
|
||
seen := make(map[int64]struct{}, len(candidateUserIDs))
|
||
for _, userID := range candidateUserIDs {
|
||
if userID == 0 {
|
||
continue
|
||
}
|
||
if _, ok := seen[userID]; ok {
|
||
continue
|
||
}
|
||
seen[userID] = struct{}{}
|
||
if len(m.byUser[userID]) == 0 {
|
||
continue
|
||
}
|
||
out = append(out, userID)
|
||
if limit > 0 && len(out) >= limit {
|
||
break
|
||
}
|
||
}
|
||
return out
|
||
}
|
||
|
||
// TrackChannelInterest replaces the channel viewer set for one live session.
|
||
// Realtime transient fan-out uses this as the current active-viewer candidate
|
||
// set; durable channel updates use the broader membership index instead.
|
||
func (m *SessionManager) TrackChannelInterest(rawAuthKeyID [8]byte, sessionID, userID int64, channelIDs []int64) {
|
||
if userID == 0 {
|
||
return
|
||
}
|
||
key := sessionKey{authKeyID: rawAuthKeyID, sessionID: sessionID}
|
||
m.mu.Lock()
|
||
defer m.mu.Unlock()
|
||
c, ok := m.bySession[key]
|
||
if !ok || c.userID.Load() != userID {
|
||
return
|
||
}
|
||
m.clearChannelInterestsLocked(key)
|
||
if len(channelIDs) == 0 {
|
||
return
|
||
}
|
||
m.trackChannelIndexLocked(m.byChannel, m.bySessionChannels, key, userID, channelIDs)
|
||
}
|
||
|
||
// ClearChannelInterest removes the active-viewer channel set for one live
|
||
// session while leaving its joined-channel membership index intact.
|
||
func (m *SessionManager) ClearChannelInterest(rawAuthKeyID [8]byte, sessionID, userID int64) {
|
||
if userID == 0 {
|
||
return
|
||
}
|
||
key := sessionKey{authKeyID: rawAuthKeyID, sessionID: sessionID}
|
||
m.mu.Lock()
|
||
defer m.mu.Unlock()
|
||
c, ok := m.bySession[key]
|
||
if !ok || c.userID.Load() != userID {
|
||
return
|
||
}
|
||
m.clearChannelInterestsLocked(key)
|
||
}
|
||
|
||
// OnlineChannelUserIDs returns users with active sessions that have recently
|
||
// proven current interest in channelID. The result is intentionally unsorted and bounded.
|
||
func (m *SessionManager) OnlineChannelUserIDs(channelID int64, limit int) []int64 {
|
||
return m.onlineChannelUsers(m.byChannel, channelID, limit)
|
||
}
|
||
|
||
// SetSessionChannelMemberships replaces the joined-channel index for one
|
||
// updates-ready session. This index is broader than TrackChannelInterest and is
|
||
// used for durable channel updates such as new/edit/delete message.
|
||
func (m *SessionManager) SetSessionChannelMemberships(rawAuthKeyID [8]byte, sessionID, userID int64, channelIDs []int64) {
|
||
key := sessionKey{authKeyID: rawAuthKeyID, sessionID: sessionID}
|
||
m.mu.Lock()
|
||
defer m.mu.Unlock()
|
||
c, ok := m.bySession[key]
|
||
if !ok {
|
||
return
|
||
}
|
||
m.clearChannelMembershipsLocked(key)
|
||
if userID == 0 || c.userID.Load() != userID {
|
||
return
|
||
}
|
||
m.trackChannelIndexLocked(m.byMemberChannel, m.bySessionMembers, key, userID, channelIDs)
|
||
}
|
||
|
||
// AddUserChannelMembership adds channelID to every live session for userID.
|
||
// It is called after successful join/invite approval paths.
|
||
func (m *SessionManager) AddUserChannelMembership(userID, channelID int64) {
|
||
if userID == 0 || channelID == 0 {
|
||
return
|
||
}
|
||
m.mu.Lock()
|
||
defer m.mu.Unlock()
|
||
for key, c := range m.byUser[userID] {
|
||
if c == nil || c.userID.Load() != userID {
|
||
continue
|
||
}
|
||
m.trackChannelIndexLocked(m.byMemberChannel, m.bySessionMembers, key, userID, []int64{channelID})
|
||
}
|
||
}
|
||
|
||
// RemoveUserChannelMembership removes channelID from every live session for userID.
|
||
// It is called after leave/kick/ban/delete paths.
|
||
func (m *SessionManager) RemoveUserChannelMembership(userID, channelID int64) {
|
||
if userID == 0 || channelID == 0 {
|
||
return
|
||
}
|
||
m.mu.Lock()
|
||
defer m.mu.Unlock()
|
||
for key := range m.byUser[userID] {
|
||
m.removeChannelIndexLocked(m.byMemberChannel, m.bySessionMembers, key, channelID)
|
||
}
|
||
}
|
||
|
||
// OnlineChannelMemberUserIDs returns users with active sessions that are indexed
|
||
// as joined members of channelID. The result is intentionally unsorted; callers
|
||
// still verify business membership before pushing.
|
||
func (m *SessionManager) OnlineChannelMemberUserIDs(channelID int64, limit int) []int64 {
|
||
return m.onlineChannelUsers(m.byMemberChannel, channelID, limit)
|
||
}
|
||
|
||
func (m *SessionManager) onlineChannelUsers(index map[int64]map[sessionKey]int64, channelID int64, limit int) []int64 {
|
||
if channelID == 0 {
|
||
return nil
|
||
}
|
||
m.mu.RLock()
|
||
defer m.mu.RUnlock()
|
||
sessions := index[channelID]
|
||
if len(sessions) == 0 {
|
||
return nil
|
||
}
|
||
out := make([]int64, 0, positiveLimitOrLen(limit, len(sessions)))
|
||
seen := make(map[int64]struct{}, len(sessions))
|
||
for key, userID := range sessions {
|
||
if userID == 0 {
|
||
continue
|
||
}
|
||
if _, ok := m.bySession[key]; !ok {
|
||
continue
|
||
}
|
||
if _, ok := seen[userID]; ok {
|
||
continue
|
||
}
|
||
seen[userID] = struct{}{}
|
||
out = append(out, userID)
|
||
if limit > 0 && len(out) >= limit {
|
||
break
|
||
}
|
||
}
|
||
return out
|
||
}
|
||
|
||
func (m *SessionManager) removeLocked(c *Conn, dropPending bool) int64 {
|
||
key := connSessionKey(c)
|
||
delete(m.bySession, key)
|
||
removeSessionIDIndex(m.bySessionID, c.sessionID, c.authKeyID)
|
||
removeConnIndex(m.byAuthKey, c.authKeyID, c.sessionID)
|
||
uid := c.userID.Load()
|
||
if uid != 0 {
|
||
removeUserIndex(m.byUser, uid, key)
|
||
}
|
||
m.clearChannelInterestsLocked(key)
|
||
m.clearChannelMembershipsLocked(key)
|
||
if dropPending {
|
||
delete(m.pending, key)
|
||
}
|
||
return uid
|
||
}
|
||
|
||
func (m *SessionManager) clearChannelInterestsLocked(key sessionKey) {
|
||
m.clearChannelIndexLocked(m.byChannel, m.bySessionChannels, key)
|
||
}
|
||
|
||
func (m *SessionManager) clearChannelMembershipsLocked(key sessionKey) {
|
||
m.clearChannelIndexLocked(m.byMemberChannel, m.bySessionMembers, key)
|
||
}
|
||
|
||
func (m *SessionManager) trackChannelIndexLocked(index map[int64]map[sessionKey]int64, reverse map[sessionKey]map[int64]struct{}, key sessionKey, userID int64, channelIDs []int64) {
|
||
channels := reverse[key]
|
||
if channels == nil {
|
||
channels = make(map[int64]struct{}, len(channelIDs))
|
||
reverse[key] = channels
|
||
}
|
||
for _, channelID := range channelIDs {
|
||
if channelID == 0 {
|
||
continue
|
||
}
|
||
channels[channelID] = struct{}{}
|
||
sessions := index[channelID]
|
||
if sessions == nil {
|
||
sessions = make(map[sessionKey]int64)
|
||
index[channelID] = sessions
|
||
}
|
||
sessions[key] = userID
|
||
}
|
||
}
|
||
|
||
func (m *SessionManager) clearChannelIndexLocked(index map[int64]map[sessionKey]int64, reverse map[sessionKey]map[int64]struct{}, key sessionKey) {
|
||
channels := reverse[key]
|
||
if len(channels) == 0 {
|
||
delete(reverse, key)
|
||
return
|
||
}
|
||
for channelID := range channels {
|
||
sessions := index[channelID]
|
||
delete(sessions, key)
|
||
if len(sessions) == 0 {
|
||
delete(index, channelID)
|
||
}
|
||
}
|
||
delete(reverse, key)
|
||
}
|
||
|
||
func (m *SessionManager) removeChannelIndexLocked(index map[int64]map[sessionKey]int64, reverse map[sessionKey]map[int64]struct{}, key sessionKey, channelID int64) {
|
||
channels := reverse[key]
|
||
delete(channels, channelID)
|
||
if len(channels) == 0 {
|
||
delete(reverse, key)
|
||
}
|
||
sessions := index[channelID]
|
||
delete(sessions, key)
|
||
if len(sessions) == 0 {
|
||
delete(index, channelID)
|
||
}
|
||
}
|
||
|
||
func positiveLimitOrLen(limit, length int) int {
|
||
if limit > 0 && limit < length {
|
||
return limit
|
||
}
|
||
return length
|
||
}
|
||
|
||
func minInt(a, b int) int {
|
||
if a < b {
|
||
return a
|
||
}
|
||
return b
|
||
}
|
||
|
||
func (m *SessionManager) takePendingLocked(key sessionKey, ready bool) []queuedPush {
|
||
if !ready || len(m.pending[key]) == 0 {
|
||
return nil
|
||
}
|
||
pending := append([]queuedPush(nil), m.pending[key]...)
|
||
delete(m.pending, key)
|
||
return pending
|
||
}
|
||
|
||
func (m *SessionManager) queueLocked(key sessionKey, t proto.MessageType, msg bin.Encoder) {
|
||
q := m.pending[key]
|
||
// 过期保护：最早一条暂存已超过 pendingPushMaxAge（session 迟迟未 ready）时，丢整批并
|
||
// 不再囤这条，记 trace。避免「登录后从不 getState」的连接长期占用 pending 内存。
|
||
if len(q) > 0 && time.Since(q[0].at) > pendingPushMaxAge {
|
||
m.log.Debug("Drop stale pending pushes (session not ready in time)",
|
||
zap.String("auth_key_id", sessionKeyLog(key.authKeyID)),
|
||
zap.Int64("session_id", key.sessionID),
|
||
zap.Int("dropped", len(q)),
|
||
)
|
||
delete(m.pending, key)
|
||
return
|
||
}
|
||
push := queuedPush{t: t, msg: msg, at: time.Now()}
|
||
if len(q) >= maxPendingPushesPerSession {
|
||
copy(q, q[1:])
|
||
q[len(q)-1] = push
|
||
m.pending[key] = q
|
||
return
|
||
}
|
||
m.pending[key] = append(q, push)
|
||
}
|
||
|
||
func (m *SessionManager) flushPending(key sessionKey, pending []queuedPush) {
|
||
for _, item := range pending {
|
||
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
|
||
err := m.PushToSessionForAuthKey(ctx, key.authKeyID, key.sessionID, item.t, item.msg)
|
||
cancel()
|
||
if err != nil {
|
||
m.log.Debug("Flush pending push failed",
|
||
zap.String("auth_key_id", sessionKeyLog(key.authKeyID)),
|
||
zap.Int64("session_id", key.sessionID),
|
||
zap.Error(err),
|
||
)
|
||
}
|
||
}
|
||
}
|
||
|
||
func (m *SessionManager) uniqueSessionLocked(sessionID int64) (*Conn, sessionKey, bool, bool) {
|
||
set := m.bySessionID[sessionID]
|
||
if len(set) == 0 {
|
||
return nil, sessionKey{}, false, false
|
||
}
|
||
if len(set) > 1 {
|
||
return nil, sessionKey{}, false, true
|
||
}
|
||
for authKeyID, c := range set {
|
||
return c, sessionKey{authKeyID: authKeyID, sessionID: sessionID}, true, false
|
||
}
|
||
return nil, sessionKey{}, false, false
|
||
}
|
||
|
||
func (m *SessionManager) dropPendingBySessionLocked(sessionID int64) {
|
||
for key := range m.pending {
|
||
if key.sessionID == sessionID {
|
||
delete(m.pending, key)
|
||
}
|
||
}
|
||
}
|
||
|
||
func addConnIndex[K comparable](idx map[K]map[int64]*Conn, key K, sessionID int64, c *Conn) {
|
||
set := idx[key]
|
||
if set == nil {
|
||
set = make(map[int64]*Conn)
|
||
idx[key] = set
|
||
}
|
||
set[sessionID] = c
|
||
}
|
||
|
||
func removeConnIndex[K comparable](idx map[K]map[int64]*Conn, key K, sessionID int64) {
|
||
if set := idx[key]; set != nil {
|
||
delete(set, sessionID)
|
||
if len(set) == 0 {
|
||
delete(idx, key)
|
||
}
|
||
}
|
||
}
|
||
|
||
func addSessionIDIndex(idx map[int64]map[[8]byte]*Conn, sessionID int64, authKeyID [8]byte, c *Conn) {
|
||
set := idx[sessionID]
|
||
if set == nil {
|
||
set = make(map[[8]byte]*Conn)
|
||
idx[sessionID] = set
|
||
}
|
||
set[authKeyID] = c
|
||
}
|
||
|
||
func removeSessionIDIndex(idx map[int64]map[[8]byte]*Conn, sessionID int64, authKeyID [8]byte) {
|
||
if set := idx[sessionID]; set != nil {
|
||
delete(set, authKeyID)
|
||
if len(set) == 0 {
|
||
delete(idx, sessionID)
|
||
}
|
||
}
|
||
}
|
||
|
||
func addUserIndex(idx map[int64]map[sessionKey]*Conn, userID int64, key sessionKey, c *Conn) {
|
||
set := idx[userID]
|
||
if set == nil {
|
||
set = make(map[sessionKey]*Conn)
|
||
idx[userID] = set
|
||
}
|
||
set[key] = c
|
||
}
|
||
|
||
func removeUserIndex(idx map[int64]map[sessionKey]*Conn, userID int64, key sessionKey) {
|
||
if set := idx[userID]; set != nil {
|
||
delete(set, key)
|
||
if len(set) == 0 {
|
||
delete(idx, userID)
|
||
}
|
||
}
|
||
}
|
||
|
||
func connSessionKey(c *Conn) sessionKey {
|
||
return sessionKey{authKeyID: c.authKeyID, sessionID: c.sessionID}
|
||
}
|
||
|
||
func connUsesBusinessAuthKey(c *Conn, authKeyID [8]byte) bool {
|
||
id, resolved := c.BusinessAuthKeyID()
|
||
if resolved {
|
||
return id == authKeyID
|
||
}
|
||
return c.authKeyID == authKeyID
|
||
}
|
||
|
||
func shouldExcludeSession(c *Conn, excludeAuthKeyID *[8]byte, excludeSessionID int64) bool {
|
||
if excludeSessionID == 0 {
|
||
return false
|
||
}
|
||
if c.sessionID != excludeSessionID {
|
||
return false
|
||
}
|
||
if excludeAuthKeyID == nil || *excludeAuthKeyID == ([8]byte{}) {
|
||
return true
|
||
}
|
||
return connUsesBusinessAuthKey(c, *excludeAuthKeyID)
|
||
}
|
||
|
||
func sessionKeyLog(id [8]byte) string {
|
||
return fmt.Sprintf("%x", id)
|
||
}
|