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111 lines
2.8 KiB
111 lines
2.8 KiB
package dao |
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import ( |
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"context" |
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"crypto/md5" |
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"fmt" |
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"strconv" |
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"time" |
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"go-common/library/cache/redis" |
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"go-common/library/ecode" |
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"go-common/library/log" |
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) |
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// LimitCheckInfo 频率限制检查参数 |
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type LimitCheckInfo struct { |
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UID int64 |
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RoomID int64 |
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Msg string |
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MsgType int64 |
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Dao *Dao |
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Conf *LimitConf |
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} |
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const ( |
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_MaxGiftMsgNum = "r:m:stormmsgcount:" |
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_MAXMsgNum = "r:m:rmx:" |
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) |
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// LimitPerSec 每秒发言限制 |
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func (l *LimitCheckInfo) LimitPerSec(ctx context.Context) error { |
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key := fmt.Sprintf("%d.%d", l.UID, time.Now().Unix()) |
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var conn = l.Dao.redis.Get(ctx) |
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defer conn.Close() |
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ret, err := conn.Do("SET", key, 1, "EX", 1, "NX") |
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if err != nil { |
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log.Error("limitPerSec:conn.Do(SET EX NX) %s %d %v", key, 1, err) |
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return nil |
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} |
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if ret != nil { |
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return nil |
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} |
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return ecode.Error(0, "msg in 1s") |
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} |
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//LimitSameMsg 同一个用户同一房间5s 只能发送一条相同弹幕 |
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func (l *LimitCheckInfo) LimitSameMsg(ctx context.Context) error { |
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key := fmt.Sprintf("%d.%s", l.RoomID, md5.Sum([]byte(strconv.FormatInt(l.UID, 10)+l.Msg))) |
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var conn = l.Dao.redis.Get(ctx) |
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defer conn.Close() |
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ret, err := conn.Do("SET", key, 1, "EX", 5, "NX") |
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if err != nil { |
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log.Error("DM LimitSameMsg conn.Do(SET, %s, 1, EX, 5, NX) error(%v)", key, err) |
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return nil |
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} |
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if ret != nil { |
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return nil |
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} |
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return ecode.Error(0, "msg repeat") |
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} |
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//LimitRoomPerSecond 单房间每秒只能发送制定条数弹幕 |
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func (l *LimitCheckInfo) LimitRoomPerSecond(ctx context.Context) error { |
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maxNum := l.Conf.DmNum |
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percent := l.Conf.DMPercent |
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danNum := maxNum * percent / 100.0 |
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giftNum := maxNum - danNum |
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msgKey := fmt.Sprintf("%s.%d.%d", _MAXMsgNum, l.RoomID, time.Now().Unix()) |
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giftKey := fmt.Sprintf("%s.%d.%d", _MaxGiftMsgNum, l.RoomID, time.Now().Unix()) |
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var conn = l.Dao.redis.Get(ctx) |
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defer conn.Close() |
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if l.MsgType != 0 { |
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//礼物弹幕 |
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if count, err := redis.Int64(conn.Do("INCRBY", giftKey, 1)); err != nil { |
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log.Error("DMRateLimit: LimitRoomPerSecond INCRBY err: %v", err) |
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} else { |
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if count > giftNum { |
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return ecode.Error(0, "max limit") |
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} |
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} |
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if _, err := conn.Do("EXPIRE", giftKey, 2); err != nil { |
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log.Error("DMRateLimit: LimitRoomPerSecond EXPIRE err: %v", err) |
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} |
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return nil |
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} |
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//普通弹幕 |
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var max = maxNum |
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if exit, err := redis.Bool(conn.Do("EXISTS", giftKey)); err != nil { |
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log.Error("DMRateLimit: LimitRoomPerSecond EXISTS gift err: %v", err) |
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} else { |
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if exit { |
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max = danNum |
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} else { |
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max = maxNum |
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} |
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} |
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if count, err := redis.Int64(conn.Do("INCRBY", msgKey, 1)); err != nil { |
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log.Error("DMRateLimit: LimitRoomPerSecond INCR err: %v", err) |
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} else { |
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if count > max { |
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return ecode.Error(0, "max limit") |
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} |
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} |
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if _, err := conn.Do("EXPIRE", msgKey, 2); err != nil { |
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log.Error("DMRateLimit: LimitRoomPerSecond EXPIRE err: %v", err) |
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} |
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return nil |
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}
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