Golang Session.View方法代码示例

func (rb *RoomBinding) RenameUser(ctx scope.Context, session proto.Session, formerName string) (
	*proto.NickEvent, error) {

	presence := &Presence{
		Room:      rb.Name,
		ServerID:  rb.desc.ID,
		ServerEra: rb.desc.Era,
		SessionID: session.ID(),
		Updated:   time.Now(),
	}
	err := presence.SetFact(&proto.Presence{
		SessionView:    *session.View(),
		LastInteracted: presence.Updated,
	})
	if err != nil {
		return nil, fmt.Errorf("presence marshal error: %s", err)
	}
	if _, err := rb.DbMap.Update(presence); err != nil {
		return nil, fmt.Errorf("presence update error: %s", err)
	}

	event := &proto.NickEvent{
		SessionID: session.ID(),
		ID:        session.Identity().ID(),
		From:      formerName,
		To:        session.Identity().Name(),
	}
	return event, rb.Backend.broadcast(ctx, rb.Room, proto.NickEventType, event, session)
}

func (b *Backend) part(ctx scope.Context, rb *RoomBinding, session proto.Session) error {
	t, err := b.DbMap.Begin()
	if err != nil {
		return err
	}

	_, err = t.Exec(
		"DELETE FROM presence WHERE room = $1 AND server_id = $2 AND server_era = $3 AND session_id = $4",
		rb.RoomName, b.desc.ID, b.desc.Era, session.ID())
	if err != nil {
		rollback(ctx, t)
		logging.Logger(ctx).Printf("failed to persist departure: %s", err)
		return err
	}

	// Broadcast a presence event.
	// TODO: make this an explicit action via the Room protocol, to support encryption
	event := proto.PresenceEvent(session.View(proto.Staff))
	if err := rb.broadcast(ctx, t, proto.PartEventType, event, session); err != nil {
		rollback(ctx, t)
		return err
	}

	if err := t.Commit(); err != nil {
		return err
	}

	b.Lock()
	if lm, ok := b.listeners[rb.RoomName]; ok {
		delete(lm, session.ID())
	}
	b.Unlock()

	return nil
}

func (r *RoomBase) Join(ctx scope.Context, session proto.Session) (string, error) {
	client := &proto.Client{}
	if !client.FromContext(ctx) {
		return "", fmt.Errorf("client data not found in scope")
	}

	r.m.Lock()
	defer r.m.Unlock()

	if r.identities == nil {
		r.identities = map[proto.UserID]proto.Identity{}
	}
	if r.nicks == nil {
		r.nicks = map[proto.UserID]string{}
	}
	if r.live == nil {
		r.live = map[proto.UserID][]proto.Session{}
	}
	if r.clients == nil {
		r.clients = map[string]*proto.Client{}
	}

	ident := session.Identity()
	id := ident.ID()

	if banned, ok := r.agentBans[ident.ID()]; ok && banned.After(time.Now()) {
		return "", proto.ErrAccessDenied
	}

	if banned, ok := r.ipBans[client.IP]; ok && banned.After(time.Now()) {
		return "", proto.ErrAccessDenied
	}

	if _, ok := r.identities[id]; !ok {
		r.identities[id] = ident
	}

	r.live[id] = append(r.live[id], session)
	r.clients[session.ID()] = client

	event := proto.PresenceEvent(session.View(proto.Staff))
	return "virt:" + event.RealClientAddress, r.broadcast(ctx, proto.JoinType, &event, session)
}

func (r *RoomBase) Part(ctx scope.Context, session proto.Session) error {
	r.m.Lock()
	defer r.m.Unlock()

	ident := session.Identity()
	id := ident.ID()
	live := r.live[id]
	for i, s := range live {
		if s == session {
			copy(live[i:], live[i+1:])
			r.live[id] = live[:len(live)-1]
		}
	}
	if len(r.live[id]) == 0 {
		delete(r.live, id)
		delete(r.identities, id)
	}
	delete(r.clients, session.ID())
	event := proto.PresenceEvent(session.View(proto.Staff))
	return r.broadcast(ctx, proto.PartEventType, &event, session)
}

func (b *Backend) part(ctx scope.Context, room *Room, session proto.Session) error {
	b.Lock()
	defer b.Unlock()

	if lm, ok := b.listeners[room.Name]; ok {
		delete(lm, session.ID())
	}

	_, err := b.DbMap.Exec(
		"DELETE FROM presence"+
			" WHERE room = $1 AND server_id = $2 AND server_era = $3 AND session_id = $4",
		room.Name, b.desc.ID, b.desc.Era, session.ID())
	if err != nil {
		backend.Logger(ctx).Printf("failed to persist departure: %s", err)
	}

	// Broadcast a presence event.
	// TODO: make this an explicit action via the Room protocol, to support encryption
	return b.broadcast(ctx, room,
		proto.PartEventType, proto.PresenceEvent(*session.View()), session)
}

func (r *memRoom) Join(ctx scope.Context, session proto.Session) error {
	client := &proto.Client{}
	if !client.FromContext(ctx) {
		return fmt.Errorf("client data not found in scope")
	}

	r.m.Lock()
	defer r.m.Unlock()

	if r.identities == nil {
		r.identities = map[proto.UserID]proto.Identity{}
	}
	if r.live == nil {
		r.live = map[proto.UserID][]proto.Session{}
	}
	if r.clients == nil {
		r.clients = map[string]*proto.Client{}
	}

	ident := session.Identity()
	id := ident.ID()

	if banned, ok := r.agentBans[ident.ID()]; ok && banned.After(time.Now()) {
		return proto.ErrAccessDenied
	}

	if banned, ok := r.ipBans[client.IP]; ok && banned.After(time.Now()) {
		return proto.ErrAccessDenied
	}

	if _, ok := r.identities[id]; !ok {
		r.identities[id] = ident
	}

	r.live[id] = append(r.live[id], session)
	r.clients[session.ID()] = client

	return r.broadcast(ctx, proto.JoinType,
		proto.PresenceEvent(*session.View()), session)
}

func (rb *RoomBinding) RenameUser(ctx scope.Context, session proto.Session, formerName string) (
	*proto.NickEvent, error) {

	presence := &Presence{
		Room:      rb.RoomName,
		ServerID:  rb.desc.ID,
		ServerEra: rb.desc.Era,
		SessionID: session.ID(),
		Updated:   time.Now(),
	}
	err := presence.SetFact(&proto.Presence{
		SessionView:    session.View(proto.Staff),
		LastInteracted: presence.Updated,
	})
	if err != nil {
		return nil, fmt.Errorf("presence marshal error: %s", err)
	}

	t, err := rb.DbMap.Begin()
	if err != nil {
		return nil, err
	}

	if _, err := t.Update(presence); err != nil {
		rollback(ctx, t)
		return nil, fmt.Errorf("presence update error: %s", err)
	}

	// Store latest nick.
	// Loop in read-committed mode to simulate UPSERT.
	for {
		// Try to insert; if this fails due to duplicate key value, try to update.
		nick := &Nick{
			Room:   rb.RoomName,
			UserID: string(session.Identity().ID()),
			Nick:   session.Identity().Name(),
		}
		if err := rb.DbMap.Insert(nick); err != nil {
			if !strings.HasPrefix(err.Error(), "pq: duplicate key value") {
				rollback(ctx, t)
				return nil, err
			}
		} else {
			break
		}
		n, err := rb.DbMap.Update(nick)
		if err != nil {
			rollback(ctx, t)
			return nil, err
		}
		if n > 0 {
			break
		}
	}

	event := &proto.NickEvent{
		SessionID: session.ID(),
		ID:        session.Identity().ID(),
		From:      formerName,
		To:        session.Identity().Name(),
	}
	if err := rb.broadcast(ctx, t, proto.NickEventType, event, session); err != nil {
		rollback(ctx, t)
		return nil, err
	}

	if err := t.Commit(); err != nil {
		return nil, err
	}

	return event, nil
}

//.........这里部分代码省略.........
		client.IP, rb.RoomName)
	if err != nil {
		rollback(ctx, t)
		return "", err
	}
	if len(ipBans) > 0 {
		logging.Logger(ctx).Printf("access denied to %s: %#v", client.IP, ipBans)
		if err := t.Rollback(); err != nil {
			return "", err
		}
		return "", proto.ErrAccessDenied
	}

	// Virtualize the session's client address.
	var row struct {
		Address string `db:"address"`
	}
	if err := t.SelectOne(&row, "SELECT virtualize_address($1, $2::inet) AS address", rb.RoomName, client.IP); err != nil {
		return "", err
	}
	virtualAddress := row.Address

	// Look up session's nick.
	nickRow, err := t.Get(Nick{}, string(session.Identity().ID()), rb.RoomName)
	if err != nil && err != sql.ErrNoRows {
		return "", err
	}
	if nickRow != nil {
		session.SetName(nickRow.(*Nick).Nick)
	}

	// Write to session log.
	// TODO: do proper upsert simulation
	entry := &SessionLog{
		SessionID: session.ID(),
		IP:        client.IP,
		Room:      rb.RoomName,
		UserAgent: client.UserAgent,
		Connected: client.Connected,
	}
	if _, err := t.Delete(entry); err != nil {
		if rerr := t.Rollback(); rerr != nil {
			logging.Logger(ctx).Printf("rollback error: %s", rerr)
		}
		return "", err
	}
	if err := t.Insert(entry); err != nil {
		if rerr := t.Rollback(); rerr != nil {
			logging.Logger(ctx).Printf("rollback error: %s", rerr)
		}
		return "", err
	}

	// Broadcast a presence event.
	// TODO: make this an explicit action via the Room protocol, to support encryption

	presence := &Presence{
		Room:      rb.RoomName,
		ServerID:  b.desc.ID,
		ServerEra: b.desc.Era,
		SessionID: session.ID(),
		Updated:   time.Now(),
	}
	sessionView := session.View(proto.Staff)
	sessionView.ClientAddress = virtualAddress
	err = presence.SetFact(&proto.Presence{
		SessionView:    sessionView,
		LastInteracted: presence.Updated,
	})
	if err != nil {
		rollback(ctx, t)
		return "", fmt.Errorf("presence marshal error: %s", err)
	}
	if err := t.Insert(presence); err != nil {
		return "", fmt.Errorf("presence insert error: %s", err)
	}

	b.Lock()
	// Add session to listeners.
	lm, ok := b.listeners[rb.RoomName]
	if !ok {
		lm = ListenerMap{}
		b.listeners[rb.RoomName] = lm
	}
	lm[session.ID()] = Listener{Session: session, Client: client}
	b.Unlock()

	event := proto.PresenceEvent(session.View(proto.Staff))
	event.ClientAddress = virtualAddress
	if err := rb.broadcast(ctx, t, proto.JoinEventType, event, session); err != nil {
		rollback(ctx, t)
		return "", err
	}

	if err := t.Commit(); err != nil {
		return "", err
	}

	return virtualAddress, nil
}

func (b *Backend) join(ctx scope.Context, room *Room, session proto.Session) error {
	client := &proto.Client{}
	if !client.FromContext(ctx) {
		return fmt.Errorf("client data not found in scope")
	}

	bannedAgentCols, err := allColumns(b.DbMap, BannedAgent{}, "")
	if err != nil {
		return err
	}

	bannedIPCols, err := allColumns(b.DbMap, BannedIP{}, "")
	if err != nil {
		return err
	}

	t, err := b.DbMap.Begin()
	if err != nil {
		return err
	}

	rb := func() { rollback(ctx, t) }

	// Check for agent ID bans.
	agentBans, err := t.Select(
		BannedAgent{},
		fmt.Sprintf(
			"SELECT %s FROM banned_agent WHERE agent_id = $1 AND (room IS NULL OR room = $2) AND (expires IS NULL OR expires > NOW())",
			bannedAgentCols),
		session.Identity().ID().String(), room.Name)
	if err != nil {
		rb()
		return err
	}
	if len(agentBans) > 0 {
		logging.Logger(ctx).Printf("access denied to %s: %#v", session.Identity().ID(), agentBans)
		if err := t.Rollback(); err != nil {
			return err
		}
		return proto.ErrAccessDenied
	}

	// Check for IP bans.
	ipBans, err := t.Select(
		BannedIP{},
		fmt.Sprintf(
			"SELECT %s FROM banned_ip WHERE ip = $1 AND (room IS NULL OR room = $2) AND (expires IS NULL OR expires > NOW())",
			bannedIPCols),
		client.IP, room.Name)
	if err != nil {
		rb()
		return err
	}
	if len(ipBans) > 0 {
		logging.Logger(ctx).Printf("access denied to %s: %#v", client.IP, ipBans)
		if err := t.Rollback(); err != nil {
			return err
		}
		return proto.ErrAccessDenied
	}

	// Write to session log.
	// TODO: do proper upsert simulation
	entry := &SessionLog{
		SessionID: session.ID(),
		IP:        client.IP,
		Room:      room.Name,
		UserAgent: client.UserAgent,
		Connected: client.Connected,
	}
	if _, err := t.Delete(entry); err != nil {
		if rerr := t.Rollback(); rerr != nil {
			logging.Logger(ctx).Printf("rollback error: %s", rerr)
		}
		return err
	}
	if err := t.Insert(entry); err != nil {
		if rerr := t.Rollback(); rerr != nil {
			logging.Logger(ctx).Printf("rollback error: %s", rerr)
		}
		return err
	}

	// Broadcast a presence event.
	// TODO: make this an explicit action via the Room protocol, to support encryption

	presence := &Presence{
		Room:      room.Name,
		ServerID:  b.desc.ID,
		ServerEra: b.desc.Era,
		SessionID: session.ID(),
		Updated:   time.Now(),
	}
	err = presence.SetFact(&proto.Presence{
		SessionView:    *session.View(),
		LastInteracted: presence.Updated,
	})
	if err != nil {
		rb()
		return fmt.Errorf("presence marshal error: %s", err)
//.........这里部分代码省略.........

func (b *Backend) join(ctx scope.Context, room *Room, session proto.Session) error {
	client := &proto.Client{}
	if !client.FromContext(ctx) {
		return fmt.Errorf("client data not found in scope")
	}

	// Check for agent ID bans.
	agentBans, err := b.DbMap.Select(
		BannedAgent{},
		"SELECT agent_id, room, created, expires, room_reason, agent_reason, private_reason"+
			" FROM banned_agent"+
			" WHERE agent_id = $1 AND (room IS NULL OR room = $2)"+
			" AND (expires IS NULL OR expires > NOW())",
		session.Identity().ID().String(), room.Name)
	if err != nil {
		return err
	}
	if len(agentBans) > 0 {
		backend.Logger(ctx).Printf("access denied to %s: %#v", session.Identity().ID(), agentBans)
		return proto.ErrAccessDenied
	}

	// Check for IP bans.
	ipBans, err := b.DbMap.Select(
		BannedIP{},
		"SELECT ip, room, created, expires, reason FROM banned_ip"+
			" WHERE ip = $1 AND (room IS NULL OR room = $2)"+
			" AND (expires IS NULL OR expires > NOW())",
		client.IP, room.Name)
	if err != nil {
		return err
	}
	if len(ipBans) > 0 {
		backend.Logger(ctx).Printf("access denied to %s: %#v", client.IP, ipBans)
		return proto.ErrAccessDenied
	}

	// Write to session log.
	entry := &SessionLog{
		SessionID: session.ID(),
		IP:        client.IP,
		Room:      room.Name,
		UserAgent: client.UserAgent,
		Connected: client.Connected,
	}
	t, err := b.DbMap.Begin()
	if err != nil {
		return err
	}
	if _, err := t.Delete(entry); err != nil {
		if rerr := t.Rollback(); rerr != nil {
			backend.Logger(ctx).Printf("rollback error: %s", rerr)
		}
		return err
	}
	if err := t.Insert(entry); err != nil {
		if rerr := t.Rollback(); rerr != nil {
			backend.Logger(ctx).Printf("rollback error: %s", rerr)
		}
		return err
	}
	if err := t.Commit(); err != nil {
		return err
	}

	b.Lock()
	defer b.Unlock()

	// Add session to listeners.
	lm, ok := b.listeners[room.Name]
	if !ok {
		b.debug("registering listener for %s", room.Name)
		lm = ListenerMap{}
		b.listeners[room.Name] = lm
	}
	lm[session.ID()] = Listener{Session: session, Client: client}

	// Broadcast a presence event.
	// TODO: make this an explicit action via the Room protocol, to support encryption

	presence := &Presence{
		Room:      room.Name,
		ServerID:  b.desc.ID,
		ServerEra: b.desc.Era,
		SessionID: session.ID(),
		Updated:   time.Now(),
	}
	err = presence.SetFact(&proto.Presence{
		SessionView:    *session.View(),
		LastInteracted: presence.Updated,
	})
	if err != nil {
		return fmt.Errorf("presence marshal error: %s", err)
	}
	if err := b.DbMap.Insert(presence); err != nil {
		return fmt.Errorf("presence insert error: %s", err)
	}
	b.debug("joining session: %#v", session)
	b.debug(" -> %#v", session.View())
	return b.broadcast(ctx, room,
//.........这里部分代码省略.........