Merge branch 'database-support' into dev

# Conflicts:
#	go.mod
#	go.sum
#	main.go

.golangci.yml

@@ -78,7 +78,9 @@ run:
   # concurrency: 4 # explicitly omit this value to fully utilize available resources.
   deadline: 5m
   issues-exit-code: 1
-  tests: false
+  skip-dirs:
+    - db
+  tests: true
 
 # output configuration options
 output:
@@ -92,4 +94,4 @@ issues:
   fix: true
   exclude-use-default: false
   exclude:
-    - "Error return value of .((os.)?std(out|err)..*|.*Close|.*Flush|os.Remove(All)?|.*print(f|ln)?|os.(Un)?Setenv). is not check"
+    - "Error return value of .((os.)?std(out|err)..*|.*Close|.*Seek|.*Flush|os.Remove(All)?|.*print(f|ln)?|os.(Un)?Setenv). is not check"

coolq/api.go

@@ -14,6 +14,9 @@ import (
 	"strings"
 	"time"
 
+	"github.com/Mrs4s/go-cqhttp/db"
+	"github.com/Mrs4s/go-cqhttp/internal/cache"
+
 	"github.com/Mrs4s/MiraiGo/binary"
 	"github.com/Mrs4s/MiraiGo/client"
 	"github.com/Mrs4s/MiraiGo/message"
@@ -462,20 +465,19 @@ func (bot *CQBot) CQSendGroupForwardMessage(groupID int64, m gjson.Result) globa
 		ts.Add(time.Second)
 		if e.Get("data.id").Exists() {
 			i := e.Get("data.id").Int()
-			m := bot.GetMessage(int32(i))
+			m, _ := bot.db.GetGroupMessageByGlobalID(int32(i))
 			if m != nil {
-				sender := m["sender"].(message.Sender)
 				return &message.ForwardNode{
-					SenderId:   sender.Uin,
+					SenderId:   m.Attribute.SenderUin,
-					SenderName: (&sender).DisplayName(),
+					SenderName: m.Attribute.SenderName,
 					Time: func() int32 {
-						msgTime := m["time"].(int32)
+						msgTime := m.Attribute.Timestamp
 						if hasCustom && msgTime == 0 {
 							return int32(ts.Unix())
 						}
-						return msgTime
+						return int32(msgTime)
 					}(),
-					Message: resolveElement(bot.ConvertStringMessage(m["message"].(string), true)),
+					Message: resolveElement(bot.ConvertContentMessage(m.Content, true)),
 				}
 			}
 			log.Warnf("警告: 引用消息 %v 错误或数据库未开启.", e.Get("data.id").Str)
@@ -779,29 +781,28 @@ func (bot *CQBot) CQProcessGroupRequest(flag, subType, reason string, approve bo
 //
 // https:// git.io/Jtz1y
 func (bot *CQBot) CQDeleteMessage(messageID int32) global.MSG {
-	msg := bot.GetMessage(messageID)
+	msg, err := bot.db.GetMessageByGlobalID(messageID)
-	if msg == nil {
+	if err != nil {
+		log.Warnf("撤回消息时出现错误: %v", err)
 		return Failed(100, "MESSAGE_NOT_FOUND", "消息不存在")
 	}
-	if _, ok := msg["group"]; ok {
+	switch o := msg.(type) {
-		if msg["internal-id"] == nil {
+	case *db.StoredGroupMessage:
-			// TODO 撤回临时对话消息
+		if err = bot.Client.RecallGroupMessage(o.GroupCode, o.Attribute.MessageSeq, o.Attribute.InternalID); err != nil {
-			log.Warnf("撤回 %v 失败: 无法撤回临时对话消息", messageID)
-			return Failed(100, "CANNOT_RECALL_TEMP_MSG", "无法撤回临时对话消息")
-		}
-		if err := bot.Client.RecallGroupMessage(msg["group"].(int64), msg["message-id"].(int32), msg["internal-id"].(int32)); err != nil {
 			log.Warnf("撤回 %v 失败: %v", messageID, err)
 			return Failed(100, "RECALL_API_ERROR", err.Error())
 		}
-	} else {
+	case *db.StoredPrivateMessage:
-		if msg["sender"].(message.Sender).Uin != bot.Client.Uin {
+		if o.Attribute.SenderUin != bot.Client.Uin {
 			log.Warnf("撤回 %v 失败: 好友会话无法撤回对方消息.", messageID)
 			return Failed(100, "CANNOT_RECALL_FRIEND_MSG", "无法撤回对方消息")
 		}
-		if err := bot.Client.RecallPrivateMessage(msg["target"].(int64), int64(msg["time"].(int32)), msg["message-id"].(int32), msg["internal-id"].(int32)); err != nil {
+		if err = bot.Client.RecallPrivateMessage(o.TargetUin, o.Attribute.Timestamp, o.Attribute.MessageSeq, o.Attribute.InternalID); err != nil {
 			log.Warnf("撤回 %v 失败: %v", messageID, err)
 			return Failed(100, "RECALL_API_ERROR", err.Error())
 		}
+	default:
+		return Failed(100, "UNKNOWN_ERROR")
 	}
 	return OK(nil)
 }
@@ -1025,10 +1026,21 @@ func (bot *CQBot) CQHandleQuickOperation(context, operation gjson.Result) global
 //
 // https://docs.go-cqhttp.org/api/#%E8%8E%B7%E5%8F%96%E5%9B%BE%E7%89%87%E4%BF%A1%E6%81%AF
 func (bot *CQBot) CQGetImage(file string) global.MSG {
-	if !global.PathExists(path.Join(global.ImagePath, file)) {
+	var b []byte
-		return Failed(100)
+	var err error
+	if cache.EnableCacheDB && strings.HasSuffix(file, ".image") {
+		var f []byte
+		f, err = hex.DecodeString(strings.TrimSuffix(file, ".image"))
+		b = cache.Image.Get(f)
 	}
-	b, err := os.ReadFile(path.Join(global.ImagePath, file))
+
+	if b == nil {
+		if !global.PathExists(path.Join(global.ImagePath, file)) {
+			return Failed(100)
+		}
+		b, err = os.ReadFile(path.Join(global.ImagePath, file))
+	}
+
 	if err == nil {
 		r := binary.NewReader(b)
 		r.ReadBytes(16)
@@ -1103,38 +1115,32 @@ func (bot *CQBot) CQGetForwardMessage(resID string) global.MSG {
 //
 // https://git.io/Jtz1b
 func (bot *CQBot) CQGetMessage(messageID int32) global.MSG {
-	msg := bot.GetMessage(messageID)
+	msg, err := bot.db.GetMessageByGlobalID(messageID)
-	if msg == nil {
+	if err != nil {
+		log.Warnf("获取消息时出现错误: %v", err)
 		return Failed(100, "MSG_NOT_FOUND", "消息不存在")
 	}
-	sender := msg["sender"].(message.Sender)
+	m := global.MSG{
-	gid, isGroup := msg["group"]
+		"message_id":    msg.GetGlobalID(),
-	raw := msg["message"].(string)
+		"message_id_v2": msg.GetID(),
-	return OK(global.MSG{
+		"message_type":  msg.GetType(),
-		"message_id":  messageID,
+		"real_id":       msg.GetAttribute().MessageSeq,
-		"real_id":     msg["message-id"],
+		"message_seq":   msg.GetAttribute().MessageSeq,
-		"message_seq": msg["message-id"],
+		"group":         msg.GetType() == "group",
-		"group":       isGroup,
-		"group_id":    gid,
-		"message_type": func() string {
-			if isGroup {
-				return "group"
-			}
-			return "private"
-		}(),
 		"sender": global.MSG{
-			"user_id":  sender.Uin,
+			"user_id":  msg.GetAttribute().SenderUin,
-			"nickname": sender.Nickname,
+			"nickname": msg.GetAttribute().SenderName,
 		},
-		"time":        msg["time"],
+		"time": msg.GetAttribute().Timestamp,
-		"raw_message": raw,
+	}
-		"message": ToFormattedMessage(bot.ConvertStringMessage(raw, isGroup), func() int64 {
+	switch o := msg.(type) {
-			if isGroup {
+	case *db.StoredGroupMessage:
-				return gid.(int64)
+		m["group_id"] = o.GroupCode
-			}
+		m["message"] = ToFormattedMessage(bot.ConvertContentMessage(o.Content, true), o.GroupCode, false)
-			return 0
+	case *db.StoredPrivateMessage:
-		}(), false),
+		m["message"] = ToFormattedMessage(bot.ConvertContentMessage(o.Content, false), 0, false)
-	})
+	}
+	return OK(m)
 }
 
 // CQGetGroupSystemMessages 扩展API-获取群文件系统消息
@@ -1296,18 +1302,13 @@ func (bot *CQBot) CQGetStatus() global.MSG {
 //
 // https://docs.go-cqhttp.org/api/#%E8%AE%BE%E7%BD%AE%E7%B2%BE%E5%8D%8E%E6%B6%88%E6%81%AF
 func (bot *CQBot) CQSetEssenceMessage(messageID int32) global.MSG {
-	msg := bot.GetMessage(messageID)
+	msg, err := bot.db.GetGroupMessageByGlobalID(messageID)
-	if msg == nil {
+	if err != nil {
 		return Failed(100, "MESSAGE_NOT_FOUND", "消息不存在")
 	}
-	if _, ok := msg["group"]; ok {
+	if err := bot.Client.SetEssenceMessage(msg.GroupCode, msg.Attribute.MessageSeq, msg.Attribute.InternalID); err != nil {
-		if err := bot.Client.SetEssenceMessage(msg["group"].(int64), msg["message-id"].(int32), msg["internal-id"].(int32)); err != nil {
+		log.Warnf("设置精华消息 %v 失败: %v", messageID, err)
-			log.Warnf("设置精华消息 %v 失败: %v", messageID, err)
+		return Failed(100, "SET_ESSENCE_MSG_ERROR", err.Error())
-			return Failed(100, "SET_ESSENCE_MSG_ERROR", err.Error())
-		}
-	} else {
-		log.Warnf("设置精华消息 %v 失败: 非群聊", messageID)
-		return Failed(100, "SET_ESSENCE_MSG_ERROR", "非群聊")
 	}
 	return OK(nil)
 }
@@ -1316,18 +1317,13 @@ func (bot *CQBot) CQSetEssenceMessage(messageID int32) global.MSG {
 //
 // https://docs.go-cqhttp.org/api/#%E7%A7%BB%E5%87%BA%E7%B2%BE%E5%8D%8E%E6%B6%88%E6%81%AF
 func (bot *CQBot) CQDeleteEssenceMessage(messageID int32) global.MSG {
-	msg := bot.GetMessage(messageID)
+	msg, err := bot.db.GetGroupMessageByGlobalID(messageID)
-	if msg == nil {
+	if err != nil {
 		return Failed(100, "MESSAGE_NOT_FOUND", "消息不存在")
 	}
-	if _, ok := msg["group"]; ok {
+	if err := bot.Client.DeleteEssenceMessage(msg.GroupCode, msg.Attribute.MessageSeq, msg.Attribute.InternalID); err != nil {
-		if err := bot.Client.DeleteEssenceMessage(msg["group"].(int64), msg["message-id"].(int32), msg["internal-id"].(int32)); err != nil {
+		log.Warnf("删除精华消息 %v 失败: %v", messageID, err)
-			log.Warnf("移出精华消息 %v 失败: %v", messageID, err)
+		return Failed(100, "SET_ESSENCE_MSG_ERROR", err.Error())
-			return Failed(100, "DEL_ESSENCE_MSG_ERROR", err.Error())
-		}
-	} else {
-		log.Warnf("移出精华消息 %v 失败: 非群聊", messageID)
-		return Failed(100, "DEL_ESSENCE_MSG_ERROR", "非群聊")
 	}
 	return OK(nil)
 }
@@ -1354,7 +1350,7 @@ func (bot *CQBot) CQGetEssenceMessageList(groupCode int64) global.MSG {
 			"sender_id":     m.SenderUin,
 			"operator_id":   m.AddDigestUin,
 		}
-		msg["message_id"] = toGlobalID(groupCode, int32(m.MessageID))
+		msg["message_id"] = db.ToGlobalID(groupCode, int32(m.MessageID))
 		list = append(list, msg)
 	}
 	return OK(list)
@@ -1440,18 +1436,17 @@ func (bot *CQBot) CQSetModelShow(modelName string, modelShow string) global.MSG
 
 // CQMarkMessageAsRead 标记消息已读
 func (bot *CQBot) CQMarkMessageAsRead(msgID int32) global.MSG {
-	m := bot.GetMessage(msgID)
+	m, err := bot.db.GetMessageByGlobalID(msgID)
-	if m == nil {
+	if err != nil {
 		return Failed(100, "MSG_NOT_FOUND", "消息不存在")
 	}
-	if _, ok := m["group"]; ok {
+	switch o := m.(type) {
-		bot.Client.MarkGroupMessageReaded(m["group"].(int64), int64(m["message-id"].(int32)))
+	case *db.StoredGroupMessage:
+		bot.Client.MarkGroupMessageReaded(o.GroupCode, int64(o.Attribute.MessageSeq))
 		return OK(nil)
+	case *db.StoredPrivateMessage:
+		bot.Client.MarkPrivateMessageReaded(o.SessionUin, o.Attribute.Timestamp)
 	}
-	if _, ok := m["from-group"]; ok {
-		return Failed(100, "MSG_TYPE_ERROR", "不支持标记临时会话")
-	}
-	bot.Client.MarkPrivateMessageReaded(m["sender"].(message.Sender).Uin, int64(m["time"].(int32)))
 	return OK(nil)
 }
 

coolq/bot.go

@@ -2,11 +2,9 @@ package coolq
 
 import (
 	"bytes"
-	"encoding/gob"
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
-	"hash/crc32"
 	"io"
 	"os"
 	"path"
@@ -14,14 +12,14 @@ import (
 	"sync"
 	"time"
 
+	"github.com/Mrs4s/go-cqhttp/db"
+
 	"github.com/Mrs4s/MiraiGo/binary"
 	"github.com/Mrs4s/MiraiGo/client"
 	"github.com/Mrs4s/MiraiGo/message"
 	"github.com/Mrs4s/MiraiGo/utils"
 	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
-	"github.com/syndtr/goleveldb/leveldb"
-	"github.com/syndtr/goleveldb/leveldb/opt"
 
 	"github.com/Mrs4s/go-cqhttp/global"
 	"github.com/Mrs4s/go-cqhttp/internal/base"
@@ -35,7 +33,7 @@ type CQBot struct {
 	lock   sync.RWMutex
 	events []func(*Event)
 
-	db               *leveldb.DB
+	db               db.IDatabase
 	friendReqCache   sync.Map
 	tempSessionCache sync.Map
 }
@@ -73,27 +71,30 @@ func NewQQBot(cli *client.QQClient) *CQBot {
 	bot := &CQBot{
 		Client: cli,
 	}
-	enableLevelDB := false
+	levelNode, levelDB := base.Database["leveldb"]
-	node, ok := base.Database["leveldb"]
+	mongoNode, mongoDB := base.Database["mongodb"]
-	if ok {
+	multiDB := db.NewMultiDatabase()
+	if levelDB {
 		lconf := new(config.LevelDBConfig)
-		_ = node.Decode(lconf)
+		_ = levelNode.Decode(lconf)
-		enableLevelDB = lconf.Enable
+		if lconf.Enable {
-	}
+			multiDB.UseDB(db.UseLevelDB())
-	if enableLevelDB {
-		p := path.Join("data", "leveldb")
-		db, err := leveldb.OpenFile(p, &opt.Options{
-			WriteBuffer: 128 * opt.KiB,
-		})
-		if err != nil {
-			log.Fatalf("打开数据库失败, 如果频繁遇到此问题请清理 data/leveldb 文件夹或关闭数据库功能。")
 		}
-		bot.db = db
-		gob.Register(message.Sender{})
-		log.Info("信息数据库初始化完成.")
-	} else {
-		log.Warn("警告: 信息数据库已关闭，将无法使用 [回复/撤回] 等功能。")
 	}
+	if mongoDB {
+		lconf := new(config.MongoDBConfig)
+		_ = mongoNode.Decode(lconf)
+		if lconf.Database == "" {
+			lconf.Database = "gocq-database"
+		}
+		if lconf.Enable {
+			multiDB.UseDB(db.UseMongoDB(lconf.URI, lconf.Database))
+		}
+	}
+	if err := multiDB.Open(); err != nil {
+		log.Fatalf("打开数据库失败: %v", err)
+	}
+	bot.db = multiDB
 	bot.Client.OnPrivateMessage(bot.privateMessageEvent)
 	bot.Client.OnGroupMessage(bot.groupMessageEvent)
 	if base.ReportSelfMessage {
@@ -148,22 +149,6 @@ func (bot *CQBot) OnEventPush(f func(e *Event)) {
 	bot.lock.Unlock()
 }
 
-// GetMessage 获取给定消息id对应的消息
-func (bot *CQBot) GetMessage(mid int32) global.MSG {
-	if bot.db != nil {
-		m := global.MSG{}
-		data, err := bot.db.Get(binary.ToBytes(mid), nil)
-		if err == nil {
-			err = gob.NewDecoder(bytes.NewReader(data)).Decode(&m)
-			if err == nil {
-				return m
-			}
-		}
-		log.Warnf("获取信息时出现错误: %v id: %v", err, mid)
-	}
-	return nil
-}
-
 // UploadLocalImageAsGroup 上传本地图片至群聊
 func (bot *CQBot) UploadLocalImageAsGroup(groupCode int64, img *LocalImageElement) (i *message.GroupImageElement, err error) {
 	if img.File != "" {
@@ -332,8 +317,9 @@ func (bot *CQBot) SendPrivateMessage(target int64, groupID int64, m *message.Sen
 		default:
 			if session == nil && groupID != 0 {
 				msg := bot.Client.SendGroupTempMessage(groupID, target, m)
-				if msg != nil {
+				if msg != nil { // nolint
-					id = bot.InsertTempMessage(target, msg)
+					// todo(Mrs4s)
+					// id = bot.InsertTempMessage(target, msg)
 				}
 				break
 			}
@@ -342,8 +328,9 @@ func (bot *CQBot) SendPrivateMessage(target int64, groupID int64, m *message.Sen
 				log.Errorf("发送临时会话消息失败: %v", err)
 				break
 			}
-			if msg != nil {
+			if msg != nil { // nolint
-				id = bot.InsertTempMessage(target, msg)
+				// todo(Mrs4s)
+				// id = bot.InsertTempMessage(target, msg)
 			}
 		}
 	case unidirectionalFriendExists(): // 单向好友
@@ -363,57 +350,91 @@ func (bot *CQBot) SendPrivateMessage(target int64, groupID int64, m *message.Sen
 
 // InsertGroupMessage 群聊消息入数据库
 func (bot *CQBot) InsertGroupMessage(m *message.GroupMessage) int32 {
-	val := global.MSG{
+	t := &message.SendingMessage{Elements: m.Elements}
-		"message-id":  m.Id,
+	replyElem := t.FirstOrNil(func(e message.IMessageElement) bool {
-		"internal-id": m.InternalId,
+		_, ok := e.(*message.ReplyElement)
-		"group":       m.GroupCode,
+		return ok
-		"group-name":  m.GroupName,
+	})
-		"sender":      m.Sender,
+	msg := &db.StoredGroupMessage{
-		"time":        m.Time,
+		ID:       encodeMessageID(m.GroupCode, m.Id),
-		"message":     ToStringMessage(m.Elements, m.GroupCode, true),
+		GlobalID: db.ToGlobalID(m.GroupCode, m.Id),
+		SubType:  "normal",
+		Attribute: &db.StoredMessageAttribute{
+			MessageSeq: m.Id,
+			InternalID: m.InternalId,
+			SenderUin:  m.Sender.Uin,
+			SenderName: m.Sender.DisplayName(),
+			Timestamp:  int64(m.Time),
+		},
+		GroupCode: m.GroupCode,
+		AnonymousID: func() string {
+			if m.Sender.IsAnonymous() {
+				return m.Sender.AnonymousInfo.AnonymousId
+			}
+			return ""
+		}(),
+		Content: ToMessageContent(m.Elements),
 	}
-	id := toGlobalID(m.GroupCode, m.Id)
+	if replyElem != nil {
-	if bot.db != nil {
+		reply := replyElem.(*message.ReplyElement)
-		buf := global.NewBuffer()
+		msg.SubType = "quote"
-		defer global.PutBuffer(buf)
+		msg.QuotedInfo = &db.QuotedInfo{
-		if err := gob.NewEncoder(buf).Encode(val); err != nil {
+			PrevID:        encodeMessageID(m.GroupCode, reply.ReplySeq),
-			log.Warnf("记录聊天数据时出现错误: %v", err)
+			PrevGlobalID:  db.ToGlobalID(m.GroupCode, reply.ReplySeq),
-			return -1
+			QuotedContent: ToMessageContent(reply.Elements),
-		}
-		if err := bot.db.Put(binary.ToBytes(id), buf.Bytes(), nil); err != nil {
-			log.Warnf("记录聊天数据时出现错误: %v", err)
-			return -1
 		}
 	}
-	return id
+	if err := bot.db.InsertGroupMessage(msg); err != nil {
+		log.Warnf("记录聊天数据时出现错误: %v", err)
+		return -1
+	}
+	return msg.GlobalID
 }
 
 // InsertPrivateMessage 私聊消息入数据库
 func (bot *CQBot) InsertPrivateMessage(m *message.PrivateMessage) int32 {
-	val := global.MSG{
+	t := &message.SendingMessage{Elements: m.Elements}
-		"message-id":  m.Id,
+	replyElem := t.FirstOrNil(func(e message.IMessageElement) bool {
-		"internal-id": m.InternalId,
+		_, ok := e.(*message.ReplyElement)
-		"target":      m.Target,
+		return ok
-		"sender":      m.Sender,
+	})
-		"time":        m.Time,
+	msg := &db.StoredPrivateMessage{
-		"message":     ToStringMessage(m.Elements, 0, true),
+		ID:       encodeMessageID(m.Sender.Uin, m.Id),
+		GlobalID: db.ToGlobalID(m.Sender.Uin, m.Id),
+		SubType:  "normal",
+		Attribute: &db.StoredMessageAttribute{
+			MessageSeq: m.Id,
+			InternalID: m.InternalId,
+			SenderUin:  m.Sender.Uin,
+			SenderName: m.Sender.DisplayName(),
+			Timestamp:  int64(m.Time),
+		},
+		SessionUin: func() int64 {
+			if m.Sender.Uin == m.Self {
+				return m.Target
+			}
+			return m.Sender.Uin
+		}(),
+		TargetUin: m.Target,
+		Content:   ToMessageContent(m.Elements),
 	}
-	id := toGlobalID(m.Sender.Uin, m.Id)
+	if replyElem != nil {
-	if bot.db != nil {
+		reply := replyElem.(*message.ReplyElement)
-		buf := global.NewBuffer()
+		msg.SubType = "quote"
-		defer global.PutBuffer(buf)
+		msg.QuotedInfo = &db.QuotedInfo{
-		if err := gob.NewEncoder(buf).Encode(val); err != nil {
+			PrevID:        encodeMessageID(reply.Sender, reply.ReplySeq),
-			log.Warnf("记录聊天数据时出现错误: %v", err)
+			PrevGlobalID:  db.ToGlobalID(reply.Sender, reply.ReplySeq),
-			return -1
+			QuotedContent: ToMessageContent(m.Elements),
-		}
-		if err := bot.db.Put(binary.ToBytes(id), buf.Bytes(), nil); err != nil {
-			log.Warnf("记录聊天数据时出现错误: %v", err)
-			return -1
 		}
 	}
-	return id
+	if err := bot.db.InsertPrivateMessage(msg); err != nil {
+		log.Warnf("记录聊天数据时出现错误: %v", err)
+		return -1
+	}
+	return msg.GlobalID
 }
 
+/*
 // InsertTempMessage 临时消息入数据库
 func (bot *CQBot) InsertTempMessage(target int64, m *message.TempMessage) int32 {
 	val := global.MSG{
@@ -426,7 +447,7 @@ func (bot *CQBot) InsertTempMessage(target int64, m *message.TempMessage) int32
 		"time":       int32(time.Now().Unix()),
 		"message":    ToStringMessage(m.Elements, 0, true),
 	}
-	id := toGlobalID(m.Sender.Uin, m.Id)
+	id := db.ToGlobalID(m.Sender.Uin, m.Id)
 	if bot.db != nil {
 		buf := global.NewBuffer()
 		defer global.PutBuffer(buf)
@@ -441,17 +462,11 @@ func (bot *CQBot) InsertTempMessage(target int64, m *message.TempMessage) int32
 	}
 	return id
 }
-
+*/
-// toGlobalID 构建`code`-`msgID`的字符串并返回其CRC32 Checksum的值
-func toGlobalID(code int64, msgID int32) int32 {
-	return int32(crc32.ChecksumIEEE([]byte(fmt.Sprintf("%d-%d", code, msgID))))
-}
 
 // Release 释放Bot实例
 func (bot *CQBot) Release() {
-	if bot.db != nil {
+
-		_ = bot.db.Close()
-	}
 }
 
 func (bot *CQBot) dispatchEventMessage(m global.MSG) {
@@ -580,3 +595,11 @@ func (bot *CQBot) uploadMedia(raw message.IMessageElement, target int64, group b
 	}
 	return nil, errors.New("unsupported message element type")
 }
+
+// encodeMessageID 临时先这样, 暂时用不上
+func encodeMessageID(target int64, seq int32) string {
+	return hex.EncodeToString(binary.NewWriterF(func(w *binary.Writer) {
+		w.WriteUInt64(uint64(target))
+		w.WriteUInt32(uint32(seq))
+	}))
+}

coolq/cqcode.go

@@ -23,8 +23,10 @@ import (
 	log "github.com/sirupsen/logrus"
 	"github.com/tidwall/gjson"
 
+	"github.com/Mrs4s/go-cqhttp/db"
 	"github.com/Mrs4s/go-cqhttp/global"
 	"github.com/Mrs4s/go-cqhttp/internal/base"
+	"github.com/Mrs4s/go-cqhttp/internal/cache"
 	"github.com/Mrs4s/go-cqhttp/internal/param"
 )
 
@@ -132,7 +134,7 @@ func ToArrayMessage(e []message.IMessageElement, groupID int64) (r []global.MSG)
 			r = append(r, global.MSG{
 				"type": "reply",
 				"data": map[string]string{
-					"id":   strconv.FormatInt(int64(toGlobalID(rid, replyElem.ReplySeq)), 10),
+					"id":   strconv.FormatInt(int64(db.ToGlobalID(rid, replyElem.ReplySeq)), 10),
 					"seq":  strconv.FormatInt(int64(replyElem.ReplySeq), 10),
 					"qq":   strconv.FormatInt(replyElem.Sender, 10),
 					"time": strconv.FormatInt(int64(replyElem.Time), 10),
@@ -142,7 +144,7 @@ func ToArrayMessage(e []message.IMessageElement, groupID int64) (r []global.MSG)
 		} else {
 			r = append(r, global.MSG{
 				"type": "reply",
-				"data": map[string]string{"id": strconv.FormatInt(int64(toGlobalID(rid, replyElem.ReplySeq)), 10)},
+				"data": map[string]string{"id": strconv.FormatInt(int64(db.ToGlobalID(rid, replyElem.ReplySeq)), 10)},
 			})
 		}
 	}
@@ -275,11 +277,11 @@ func ToStringMessage(e []message.IMessageElement, groupID int64, isRaw ...bool)
 		}
 		if base.ExtraReplyData {
 			write("[CQ:reply,id=%d,seq=%d,qq=%d,time=%d,text=%s]",
-				toGlobalID(rid, replyElem.ReplySeq),
+				db.ToGlobalID(rid, replyElem.ReplySeq),
 				replyElem.ReplySeq, replyElem.Sender, replyElem.Time,
 				CQCodeEscapeValue(ToStringMessage(replyElem.Elements, groupID)))
 		} else {
-			write("[CQ:reply,id=%d]", toGlobalID(rid, replyElem.ReplySeq))
+			write("[CQ:reply,id=%d]", db.ToGlobalID(rid, replyElem.ReplySeq))
 		}
 	}
 	for i, elem := range e {
@@ -355,6 +357,110 @@ func ToStringMessage(e []message.IMessageElement, groupID int64, isRaw ...bool)
 	return
 }
 
+// ToMessageContent 将消息转换成 Content. 忽略 Reply
+// 不同于 onebot 的 Array Message, 此函数转换出来的 Content 的 data 段为实际类型
+// 方便数据库查询
+func ToMessageContent(e []message.IMessageElement) (r []global.MSG) {
+	for _, elem := range e {
+		var m global.MSG
+		switch o := elem.(type) {
+		case *message.TextElement:
+			m = global.MSG{
+				"type": "text",
+				"data": global.MSG{"text": o.Content},
+			}
+		case *message.LightAppElement:
+			m = global.MSG{
+				"type": "json",
+				"data": global.MSG{"data": o.Content},
+			}
+		case *message.AtElement:
+			if o.Target == 0 {
+				m = global.MSG{
+					"type": "at",
+					"data": global.MSG{
+						"subType": "all",
+					},
+				}
+			} else {
+				m = global.MSG{
+					"type": "at",
+					"data": global.MSG{
+						"subType": "user",
+						"target":  o.Target,
+						"display": o.Display,
+					},
+				}
+			}
+		case *message.RedBagElement:
+			m = global.MSG{
+				"type": "redbag",
+				"data": global.MSG{"title": o.Title, "type": o.MsgType},
+			}
+		case *message.ForwardElement:
+			m = global.MSG{
+				"type": "forward",
+				"data": global.MSG{"id": o.ResId},
+			}
+		case *message.FaceElement:
+			m = global.MSG{
+				"type": "face",
+				"data": global.MSG{"id": o.Index},
+			}
+		case *message.VoiceElement:
+			m = global.MSG{
+				"type": "record",
+				"data": global.MSG{"file": o.Name, "url": o.Url},
+			}
+		case *message.ShortVideoElement:
+			m = global.MSG{
+				"type": "video",
+				"data": global.MSG{"file": o.Name, "url": o.Url},
+			}
+		case *message.GroupImageElement:
+			data := global.MSG{"file": hex.EncodeToString(o.Md5) + ".image", "url": o.Url, "subType": uint32(o.ImageBizType)}
+			switch {
+			case o.Flash:
+				data["type"] = "flash"
+			case o.EffectID != 0:
+				data["type"] = "show"
+				data["id"] = o.EffectID
+			}
+			m = global.MSG{
+				"type": "image",
+				"data": data,
+			}
+		case *message.FriendImageElement:
+			data := global.MSG{"file": hex.EncodeToString(o.Md5) + ".image", "url": o.Url}
+			if o.Flash {
+				data["type"] = "flash"
+			}
+			m = global.MSG{
+				"type": "image",
+				"data": data,
+			}
+		case *message.ServiceElement:
+			if isOk := strings.Contains(o.Content, "<?xml"); isOk {
+				m = global.MSG{
+					"type": "xml",
+					"data": global.MSG{"data": o.Content, "resid": o.Id},
+				}
+			} else {
+				m = global.MSG{
+					"type": "json",
+					"data": global.MSG{"data": o.Content, "resid": o.Id},
+				}
+			}
+		default:
+			continue
+		}
+		if m != nil {
+			r = append(r, m)
+		}
+	}
+	return
+}
+
 // ConvertStringMessage 将消息字符串转为消息元素数组
 func (bot *CQBot) ConvertStringMessage(raw string, isGroup bool) (r []message.IMessageElement) {
 	var t, key string
@@ -373,7 +479,7 @@ func (bot *CQBot) ConvertStringMessage(raw string, isGroup bool) (r []message.IM
 			switch {
 			case customText != "":
 				var elem *message.ReplyElement
-				var org global.MSG
+				var org db.IStoredMessage
 				sender, senderErr := strconv.ParseInt(d["qq"], 10, 64)
 				if senderErr != nil && err != nil {
 					log.Warnf("警告: 自定义 Reply 元素中必须包含 Uin 或 id")
@@ -385,13 +491,13 @@ func (bot *CQBot) ConvertStringMessage(raw string, isGroup bool) (r []message.IM
 				}
 				messageSeq, seqErr := strconv.ParseInt(d["seq"], 10, 64)
 				if err == nil {
-					org = bot.GetMessage(int32(mid))
+					org, _ = bot.db.GetMessageByGlobalID(int32(mid))
 				}
 				if org != nil {
 					elem = &message.ReplyElement{
-						ReplySeq: org["message-id"].(int32),
+						ReplySeq: org.GetAttribute().MessageSeq,
-						Sender:   org["sender"].(message.Sender).Uin,
+						Sender:   org.GetAttribute().SenderUin,
-						Time:     org["time"].(int32),
+						Time:     int32(org.GetAttribute().Timestamp),
 						Elements: bot.ConvertStringMessage(customText, isGroup),
 					}
 					if senderErr != nil {
@@ -413,14 +519,14 @@ func (bot *CQBot) ConvertStringMessage(raw string, isGroup bool) (r []message.IM
 				}
 				r = append([]message.IMessageElement{elem}, r...)
 			case err == nil:
-				org := bot.GetMessage(int32(mid))
+				org, err := bot.db.GetMessageByGlobalID(int32(mid))
-				if org != nil {
+				if err == nil {
 					r = append([]message.IMessageElement{
 						&message.ReplyElement{
-							ReplySeq: org["message-id"].(int32),
+							ReplySeq: org.GetAttribute().MessageSeq,
-							Sender:   org["sender"].(message.Sender).Uin,
+							Sender:   org.GetAttribute().SenderUin,
-							Time:     org["time"].(int32),
+							Time:     int32(org.GetAttribute().Timestamp),
-							Elements: bot.ConvertStringMessage(org["message"].(string), isGroup),
+							Elements: bot.ConvertContentMessage(org.GetContent(), isGroup),
 						},
 					}, r...)
 				}
@@ -545,7 +651,7 @@ func (bot *CQBot) ConvertObjectMessage(m gjson.Result, isGroup bool) (r []messag
 			switch {
 			case customText != "":
 				var elem *message.ReplyElement
-				var org global.MSG
+				var org db.IStoredMessage
 				sender, senderErr := strconv.ParseInt(e.Get("data.[user_id,qq]").String(), 10, 64)
 				if senderErr != nil && err != nil {
 					log.Warnf("警告: 自定义 Reply 元素中必须包含 user_id 或 id")
@@ -557,13 +663,13 @@ func (bot *CQBot) ConvertObjectMessage(m gjson.Result, isGroup bool) (r []messag
 				}
 				messageSeq, seqErr := strconv.ParseInt(e.Get("data.seq").String(), 10, 64)
 				if err == nil {
-					org = bot.GetMessage(int32(mid))
+					org, _ = bot.db.GetMessageByGlobalID(int32(mid))
 				}
 				if org != nil {
 					elem = &message.ReplyElement{
-						ReplySeq: org["message-id"].(int32),
+						ReplySeq: org.GetAttribute().MessageSeq,
-						Sender:   org["sender"].(message.Sender).Uin,
+						Sender:   org.GetAttribute().SenderUin,
-						Time:     org["time"].(int32),
+						Time:     int32(org.GetAttribute().Timestamp),
 						Elements: bot.ConvertStringMessage(customText, isGroup),
 					}
 					if senderErr != nil {
@@ -585,14 +691,14 @@ func (bot *CQBot) ConvertObjectMessage(m gjson.Result, isGroup bool) (r []messag
 				}
 				r = append([]message.IMessageElement{elem}, r...)
 			case err == nil:
-				org := bot.GetMessage(int32(mid))
+				org, err := bot.db.GetMessageByGlobalID(int32(mid))
-				if org != nil {
+				if err == nil {
 					r = append([]message.IMessageElement{
 						&message.ReplyElement{
-							ReplySeq: org["message-id"].(int32),
+							ReplySeq: org.GetAttribute().MessageSeq,
-							Sender:   org["sender"].(message.Sender).Uin,
+							Sender:   org.GetAttribute().SenderUin,
-							Time:     org["time"].(int32),
+							Time:     int32(org.GetAttribute().Timestamp),
-							Elements: bot.ConvertStringMessage(org["message"].(string), isGroup),
+							Elements: bot.ConvertContentMessage(org.GetContent(), isGroup),
 						},
 					}, r...)
 				}
@@ -648,6 +754,75 @@ func (bot *CQBot) ConvertObjectMessage(m gjson.Result, isGroup bool) (r []messag
 	return
 }
 
+// ConvertContentMessage 将数据库用的 content 转换为消息元素数组
+func (bot *CQBot) ConvertContentMessage(content []global.MSG, group bool) (r []message.IMessageElement) {
+	for _, c := range content {
+		data := c["data"].(global.MSG)
+		switch c["type"] {
+		case "text":
+			r = append(r, message.NewText(data["text"].(string)))
+		case "image":
+			e, err := bot.makeImageOrVideoElem(map[string]string{"file": data["file"].(string)}, false, group)
+			if err != nil {
+				log.Warnf("make image elem error: %v", err)
+				continue
+			}
+			flash, id := false, int32(0)
+			if t, ok := data["type"]; ok {
+				if t.(string) == "flash" {
+					flash = true
+				}
+				if t.(string) == "show" {
+					id = data["id"].(int32)
+					if id < 40000 || id >= 40006 {
+						id = 40000
+					}
+				}
+			}
+			switch img := e.(type) {
+			case *LocalImageElement:
+				img.Flash = flash
+				img.EffectID = id
+			case *message.GroupImageElement:
+				img.Flash = flash
+				img.EffectID = id
+				img.ImageBizType = message.ImageBizType(data["subType"].(uint32))
+			case *message.FriendImageElement:
+				img.Flash = flash
+			}
+			r = append(r, e)
+		case "at":
+			switch data["subType"].(string) {
+			case "all":
+				r = append(r, message.NewAt(0))
+			case "user":
+				r = append(r, message.NewAt(data["target"].(int64), data["display"].(string)))
+			default:
+				continue
+			}
+		case "redbag":
+			r = append(r, &message.RedBagElement{
+				MsgType: message.RedBagMessageType(data["type"].(int)),
+				Title:   data["title"].(string),
+			})
+		case "forward":
+			r = append(r, &message.ForwardElement{
+				ResId: data["id"].(string),
+			})
+		case "face":
+			r = append(r, message.NewFace(data["id"].(int32)))
+		case "video":
+			e, err := bot.makeImageOrVideoElem(map[string]string{"file": data["file"].(string)}, true, group)
+			if err != nil {
+				log.Warnf("make image elem error: %v", err)
+				continue
+			}
+			r = append(r, e)
+		}
+	}
+	return
+}
+
 // ToElement 将解码后的CQCode转换为Element.
 //
 // 返回 interface{} 存在三种类型
@@ -1120,23 +1295,31 @@ func (bot *CQBot) makeImageOrVideoElem(d map[string]string, video, group bool) (
 	}
 	rawPath := path.Join(global.ImagePath, f)
 	if video {
+		if strings.HasSuffix(f, ".video") && cache.EnableCacheDB {
+			hash, err := hex.DecodeString(strings.TrimSuffix(f, ".video"))
+			if err == nil {
+				if b := cache.Video.Get(hash); b != nil {
+					return bot.readVideoCache(b), nil
+				}
+			}
+		}
 		rawPath = path.Join(global.VideoPath, f)
 		if !global.PathExists(rawPath) {
 			return nil, errors.New("invalid video")
 		}
-		if path.Ext(rawPath) == ".video" {
+		if path.Ext(rawPath) != ".video" {
-			b, _ := os.ReadFile(rawPath)
+			return &LocalVideoElement{File: rawPath}, nil
-			r := binary.NewReader(b)
+		}
-			return &message.ShortVideoElement{ // todo 检查缓存是否有效
+		b, _ := os.ReadFile(rawPath)
-				Md5:       r.ReadBytes(16),
+		return bot.readVideoCache(b), nil
-				ThumbMd5:  r.ReadBytes(16),
+	}
-				Size:      r.ReadInt32(),
+	if strings.HasSuffix(f, ".image") && cache.EnableCacheDB {
-				ThumbSize: r.ReadInt32(),
+		hash, err := hex.DecodeString(strings.TrimSuffix(f, ".image"))
-				Name:      r.ReadString(),
+		if err == nil {
-				Uuid:      r.ReadAvailable(),
+			if b := cache.Image.Get(hash); b != nil {
-			}, nil
+				return bot.readImageCache(b, group)
+			}
 		}
-		return &LocalVideoElement{File: rawPath}, nil
 	}
 	exist := global.PathExists(rawPath)
 	if !exist && global.PathExists(path.Join(global.ImagePathOld, f)) {
@@ -1156,8 +1339,13 @@ func (bot *CQBot) makeImageOrVideoElem(d map[string]string, video, group bool) (
 	if err != nil {
 		return nil, err
 	}
+	return bot.readImageCache(b, group)
+}
+
+func (bot *CQBot) readImageCache(b []byte, group bool) (message.IMessageElement, error) {
+	var err error
 	if len(b) < 20 {
-		return nil, errors.New("invalid local file")
+		return nil, errors.New("invalid cache")
 	}
 	r := binary.NewReader(b)
 	hash := r.ReadBytes(16)
@@ -1189,6 +1377,18 @@ ok:
 	return rsp, nil
 }
 
+func (bot *CQBot) readVideoCache(b []byte) message.IMessageElement {
+	r := binary.NewReader(b)
+	return &message.ShortVideoElement{ // todo 检查缓存是否有效
+		Md5:       r.ReadBytes(16),
+		ThumbMd5:  r.ReadBytes(16),
+		Size:      r.ReadInt32(),
+		ThumbSize: r.ReadInt32(),
+		Name:      r.ReadString(),
+		Uuid:      r.ReadAvailable(),
+	}
+}
+
 // makeShowPic 一种xml 方式发送的群消息图片
 func (bot *CQBot) makeShowPic(elem message.IMessageElement, source string, brief string, icon string, minWidth int64, minHeight int64, maxWidth int64, maxHeight int64, group bool) ([]message.IMessageElement, error) {
 	xml := ""

coolq/cqcode_test.go

@@ -41,7 +41,7 @@ const bText = `123456789[]&987654321[]&987654321[]&987654321[]&987654321[]&98765
 func BenchmarkCQCodeEscapeText(b *testing.B) {
 	for i := 0; i < b.N; i++ {
 		ret := bText
-		ret = CQCodeEscapeText(ret)
+		CQCodeEscapeText(ret)
 	}
 }
 
@@ -50,7 +50,7 @@ func BenchmarkCQCodeEscapeTextBefore(b *testing.B) {
 		ret := bText
 		ret = strings.ReplaceAll(ret, "&", "&amp;")
 		ret = strings.ReplaceAll(ret, "[", "&#91;")
-		ret = strings.ReplaceAll(ret, "]", "&#93;")
+		strings.ReplaceAll(ret, "]", "&#93;")
 	}
 }
 

coolq/event.go

@@ -8,6 +8,9 @@ import (
 	"strings"
 	"time"
 
+	"github.com/Mrs4s/go-cqhttp/db"
+	"github.com/Mrs4s/go-cqhttp/internal/cache"
+
 	"github.com/Mrs4s/go-cqhttp/global"
 	"github.com/Mrs4s/go-cqhttp/internal/base"
 
@@ -105,8 +108,9 @@ func (bot *CQBot) tempMessageEvent(c *client.QQClient, e *client.TempMessageEven
 	cqm := ToStringMessage(m.Elements, 0, true)
 	bot.tempSessionCache.Store(m.Sender.Uin, e.Session)
 	id := m.Id
-	if bot.db != nil {
+	if bot.db != nil { // nolint
-		id = bot.InsertTempMessage(m.Sender.Uin, m)
+		// todo(Mrs4s)
+		// id = bot.InsertTempMessage(m.Sender.Uin, m)
 	}
 	log.Infof("收到来自群 %v(%v) 内 %v(%v) 的临时会话消息: %v", m.GroupName, m.GroupCode, m.Sender.DisplayName(), m.Sender.Uin, cqm)
 	tm := global.MSG{
@@ -172,7 +176,7 @@ func (bot *CQBot) groupMutedEvent(c *client.QQClient, e *client.GroupMuteEvent)
 
 func (bot *CQBot) groupRecallEvent(c *client.QQClient, e *client.GroupMessageRecalledEvent) {
 	g := c.FindGroup(e.GroupCode)
-	gid := toGlobalID(e.GroupCode, e.MessageId)
+	gid := db.ToGlobalID(e.GroupCode, e.MessageId)
 	log.Infof("群 %v 内 %v 撤回了 %v 的消息: %v.",
 		formatGroupName(g), formatMemberName(g.FindMember(e.OperatorUin)), formatMemberName(g.FindMember(e.AuthorUin)), gid)
 	bot.dispatchEventMessage(global.MSG{
@@ -289,7 +293,7 @@ func (bot *CQBot) memberTitleUpdatedEvent(c *client.QQClient, e *client.MemberSp
 
 func (bot *CQBot) friendRecallEvent(c *client.QQClient, e *client.FriendMessageRecalledEvent) {
 	f := c.FindFriend(e.FriendUin)
-	gid := toGlobalID(e.FriendUin, e.MessageId)
+	gid := db.ToGlobalID(e.FriendUin, e.MessageId)
 	if f != nil {
 		log.Infof("好友 %v(%v) 撤回了消息: %v", f.Nickname, f.Uin, gid)
 	} else {
@@ -466,7 +470,7 @@ func (bot *CQBot) otherClientStatusChangedEvent(c *client.QQClient, e *client.Ot
 
 func (bot *CQBot) groupEssenceMsg(c *client.QQClient, e *client.GroupDigestEvent) {
 	g := c.FindGroup(e.GroupCode)
-	gid := toGlobalID(e.GroupCode, e.MessageID)
+	gid := db.ToGlobalID(e.GroupCode, e.MessageID)
 	if e.OperationType == 1 {
 		log.Infof(
 			"群 %v 内 %v 将 %v 的消息(%v)设为了精华消息.",
@@ -545,29 +549,37 @@ func (bot *CQBot) groupDecrease(groupCode, userUin int64, operator *client.Group
 }
 
 func (bot *CQBot) checkMedia(e []message.IMessageElement) {
+	// TODO(wdvxdr): remove these old cache file in v1.0.0
 	for _, elem := range e {
 		switch i := elem.(type) {
 		case *message.GroupImageElement:
+			data := binary.NewWriterF(func(w *binary.Writer) {
+				w.Write(i.Md5)
+				w.WriteUInt32(uint32(i.Size))
+				w.WriteString(i.ImageId)
+				w.WriteString(i.Url)
+			})
 			filename := hex.EncodeToString(i.Md5) + ".image"
-			if !global.PathExists(path.Join(global.ImagePath, filename)) {
+			if cache.EnableCacheDB {
-				_ = os.WriteFile(path.Join(global.ImagePath, filename), binary.NewWriterF(func(w *binary.Writer) {
+				cache.Image.Insert(i.Md5, data)
-					w.Write(i.Md5)
+			} else if !global.PathExists(path.Join(global.ImagePath, filename)) {
-					w.WriteUInt32(uint32(i.Size))
+				_ = os.WriteFile(path.Join(global.ImagePath, filename), data, 0o644)
-					w.WriteString(i.ImageId)
-					w.WriteString(i.Url)
-				}), 0o644)
 			}
 		case *message.FriendImageElement:
+			data := binary.NewWriterF(func(w *binary.Writer) {
+				w.Write(i.Md5)
+				w.WriteUInt32(uint32(i.Size))
+				w.WriteString(i.ImageId)
+				w.WriteString(i.Url)
+			})
 			filename := hex.EncodeToString(i.Md5) + ".image"
-			if !global.PathExists(path.Join(global.ImagePath, filename)) {
+			if cache.EnableCacheDB {
-				_ = os.WriteFile(path.Join(global.ImagePath, filename), binary.NewWriterF(func(w *binary.Writer) {
+				cache.Image.Insert(i.Md5, data)
-					w.Write(i.Md5)
+			} else if !global.PathExists(path.Join(global.ImagePath, filename)) {
-					w.WriteUInt32(uint32(i.Size))
+				_ = os.WriteFile(path.Join(global.ImagePath, filename), data, 0o644)
-					w.WriteString(i.ImageId)
-					w.WriteString(i.Url)
-				}), 0o644)
 			}
 		case *message.VoiceElement:
+			// todo: don't download original file?
 			i.Name = strings.ReplaceAll(i.Name, "{", "")
 			i.Name = strings.ReplaceAll(i.Name, "}", "")
 			if !global.PathExists(path.Join(global.VoicePath, i.Name)) {
@@ -579,16 +591,19 @@ func (bot *CQBot) checkMedia(e []message.IMessageElement) {
 				_ = os.WriteFile(path.Join(global.VoicePath, i.Name), b, 0o644)
 			}
 		case *message.ShortVideoElement:
+			data := binary.NewWriterF(func(w *binary.Writer) {
+				w.Write(i.Md5)
+				w.Write(i.ThumbMd5)
+				w.WriteUInt32(uint32(i.Size))
+				w.WriteUInt32(uint32(i.ThumbSize))
+				w.WriteString(i.Name)
+				w.Write(i.Uuid)
+			})
 			filename := hex.EncodeToString(i.Md5) + ".video"
-			if !global.PathExists(path.Join(global.VideoPath, filename)) {
+			if cache.EnableCacheDB {
-				_ = os.WriteFile(path.Join(global.VideoPath, filename), binary.NewWriterF(func(w *binary.Writer) {
+				cache.Video.Insert(i.Md5, data)
-					w.Write(i.Md5)
+			} else if !global.PathExists(path.Join(global.VideoPath, filename)) {
-					w.Write(i.ThumbMd5)
+				_ = os.WriteFile(path.Join(global.VideoPath, filename), data, 0o644)
-					w.WriteUInt32(uint32(i.Size))
-					w.WriteUInt32(uint32(i.ThumbSize))
-					w.WriteString(i.Name)
-					w.Write(i.Uuid)
-				}), 0o644)
 			}
 			i.Name = filename
 			i.Url = bot.Client.GetShortVideoUrl(i.Uuid, i.Md5)

db/database.go

@@ -0,0 +1,101 @@
+package db
+
+import (
+	"fmt"
+	"hash/crc32"
+
+	"github.com/Mrs4s/go-cqhttp/global"
+)
+
+type (
+	// IDatabase 数据库操作接口定义
+	IDatabase interface {
+		// Open 初始化数据库
+		Open() error
+
+		// GetMessageByGlobalID 通过 GlobalID 来获取消息
+		GetMessageByGlobalID(int32) (IStoredMessage, error)
+		// GetGroupMessageByGlobalID 通过 GlobalID 来获取群消息
+		GetGroupMessageByGlobalID(int32) (*StoredGroupMessage, error)
+		// GetPrivateMessageByGlobalID 通过 GlobalID 来获取私聊消息
+		GetPrivateMessageByGlobalID(int32) (*StoredPrivateMessage, error)
+
+		// InsertGroupMessage 向数据库写入新的群消息
+		InsertGroupMessage(*StoredGroupMessage) error
+		// InsertPrivateMessage 向数据库写入新的私聊消息
+		InsertPrivateMessage(*StoredPrivateMessage) error
+	}
+
+	IStoredMessage interface {
+		GetID() string
+		GetType() string
+		GetGlobalID() int32
+		GetAttribute() *StoredMessageAttribute
+		GetContent() []global.MSG
+	}
+
+	// StoredGroupMessage 持久化群消息
+	StoredGroupMessage struct {
+		ID          string                  `bson:"_id"`
+		GlobalID    int32                   `bson:"globalId"`
+		Attribute   *StoredMessageAttribute `bson:"attribute"`
+		SubType     string                  `bson:"subType"`
+		QuotedInfo  *QuotedInfo             `bson:"quotedInfo"`
+		GroupCode   int64                   `bson:"groupCode"`
+		AnonymousID string                  `bson:"anonymousId"`
+		Content     []global.MSG            `bson:"content"`
+	}
+
+	// StoredPrivateMessage 持久化私聊消息
+	StoredPrivateMessage struct {
+		ID         string                  `bson:"_id"`
+		GlobalID   int32                   `bson:"globalId"`
+		Attribute  *StoredMessageAttribute `bson:"attribute"`
+		SubType    string                  `bson:"subType"`
+		QuotedInfo *QuotedInfo             `bson:"quotedInfo"`
+		SessionUin int64                   `bson:"sessionUin"`
+		TargetUin  int64                   `bson:"targetUin"`
+		Content    []global.MSG            `bson:"content"`
+	}
+
+	// StoredMessageAttribute 持久化消息属性
+	StoredMessageAttribute struct {
+		MessageSeq int32  `bson:"messageSeq"`
+		InternalID int32  `bson:"internalId"`
+		SenderUin  int64  `bson:"senderUin"`
+		SenderName string `bson:"senderName"`
+		Timestamp  int64  `bson:"timestamp"`
+	}
+
+	// QuotedInfo 引用回复
+	QuotedInfo struct {
+		PrevID        string       `bson:"prevId"`
+		PrevGlobalID  int32        `bson:"prevGlobalId"`
+		QuotedContent []global.MSG `bson:"quotedContent"`
+	}
+)
+
+// ToGlobalID 构建`code`-`msgID`的字符串并返回其CRC32 Checksum的值
+func ToGlobalID(code int64, msgID int32) int32 {
+	return int32(crc32.ChecksumIEEE([]byte(fmt.Sprintf("%d-%d", code, msgID))))
+}
+
+func (m *StoredGroupMessage) GetID() string { return m.ID }
+
+func (m *StoredGroupMessage) GetType() string { return "group" }
+
+func (m *StoredGroupMessage) GetGlobalID() int32 { return m.GlobalID }
+
+func (m *StoredGroupMessage) GetAttribute() *StoredMessageAttribute { return m.Attribute }
+
+func (m *StoredGroupMessage) GetContent() []global.MSG { return m.Content }
+
+func (m *StoredPrivateMessage) GetID() string { return m.ID }
+
+func (m *StoredPrivateMessage) GetType() string { return "private" }
+
+func (m *StoredPrivateMessage) GetGlobalID() int32 { return m.GlobalID }
+
+func (m *StoredPrivateMessage) GetAttribute() *StoredMessageAttribute { return m.Attribute }
+
+func (m *StoredPrivateMessage) GetContent() []global.MSG { return m.Content }

db/leveldb.go

@@ -0,0 +1,118 @@
+package db
+
+import (
+	"bytes"
+	"encoding/gob"
+	"path"
+
+	"github.com/Mrs4s/MiraiGo/binary"
+	"github.com/pkg/errors"
+	"github.com/syndtr/goleveldb/leveldb"
+	"github.com/syndtr/goleveldb/leveldb/opt"
+
+	"github.com/Mrs4s/go-cqhttp/global"
+)
+
+type LevelDBImpl struct {
+	db *leveldb.DB
+}
+
+const (
+	group   byte = 0x0
+	private byte = 0x1
+)
+
+func UseLevelDB() *LevelDBImpl {
+	gob.Register(StoredMessageAttribute{})
+	gob.Register(QuotedInfo{})
+	gob.Register(global.MSG{})
+	gob.Register(StoredGroupMessage{})
+	gob.Register(StoredPrivateMessage{})
+	return &LevelDBImpl{}
+}
+
+func (db *LevelDBImpl) Open() error {
+	p := path.Join("data", "leveldb-v2")
+	d, err := leveldb.OpenFile(p, &opt.Options{
+		WriteBuffer: 128 * opt.KiB,
+	})
+	if err != nil {
+		return errors.Wrap(err, "open level db error")
+	}
+	db.db = d
+	return nil
+}
+
+func (db *LevelDBImpl) GetMessageByGlobalID(id int32) (IStoredMessage, error) {
+	v, err := db.db.Get(binary.ToBytes(id), nil)
+	if err != nil {
+		return nil, errors.Wrap(err, "get value error")
+	}
+	r := binary.NewReader(v)
+	switch r.ReadByte() {
+	case group:
+		g := &StoredGroupMessage{}
+		if err = gob.NewDecoder(bytes.NewReader(r.ReadAvailable())).Decode(g); err != nil {
+			return nil, errors.Wrap(err, "decode message error")
+		}
+		return g, nil
+	case private:
+		p := &StoredPrivateMessage{}
+		if err = gob.NewDecoder(bytes.NewReader(r.ReadAvailable())).Decode(p); err != nil {
+			return nil, errors.Wrap(err, "decode message error")
+		}
+		return p, nil
+	default:
+		return nil, errors.New("unknown message flag")
+	}
+}
+
+func (db *LevelDBImpl) GetGroupMessageByGlobalID(id int32) (*StoredGroupMessage, error) {
+	i, err := db.GetMessageByGlobalID(id)
+	if err != nil {
+		return nil, err
+	}
+	g, ok := i.(*StoredGroupMessage)
+	if !ok {
+		return nil, errors.New("message type error")
+	}
+	return g, nil
+}
+
+func (db *LevelDBImpl) GetPrivateMessageByGlobalID(id int32) (*StoredPrivateMessage, error) {
+	i, err := db.GetMessageByGlobalID(id)
+	if err != nil {
+		return nil, err
+	}
+	p, ok := i.(*StoredPrivateMessage)
+	if !ok {
+		return nil, errors.New("message type error")
+	}
+	return p, nil
+}
+
+func (db *LevelDBImpl) InsertGroupMessage(msg *StoredGroupMessage) error {
+	buf := global.NewBuffer()
+	defer global.PutBuffer(buf)
+	if err := gob.NewEncoder(buf).Encode(msg); err != nil {
+		return errors.Wrap(err, "encode message error")
+	}
+	err := db.db.Put(binary.ToBytes(msg.GlobalID), binary.NewWriterF(func(w *binary.Writer) {
+		w.WriteByte(group)
+		w.Write(buf.Bytes())
+	}), nil)
+	return errors.Wrap(err, "put data error")
+}
+
+func (db *LevelDBImpl) InsertPrivateMessage(msg *StoredPrivateMessage) error {
+	buf := global.NewBuffer()
+	defer global.PutBuffer(buf)
+	if err := gob.NewEncoder(buf).Encode(msg); err != nil {
+		return errors.Wrap(err, "encode message error")
+	}
+	err := db.db.Put(binary.ToBytes(msg.GlobalID), binary.NewWriterF(func(w *binary.Writer) {
+		w.WriteByte(private)
+		w.Write(buf.Bytes())
+	}), nil)
+	return errors.Wrap(err, "put data error")
+}

db/mongodb.go

@@ -0,0 +1,71 @@
+package db
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+)
+
+type MongoDBImpl struct {
+	uri   string
+	db    string
+	mongo *mongo.Database
+}
+
+const (
+	MongoGroupMessageCollection   = "group-messages"
+	MongoPrivateMessageCollection = "private-messages"
+)
+
+func UseMongoDB(uri, db string) *MongoDBImpl {
+	return &MongoDBImpl{uri: uri, db: db}
+}
+
+func (db *MongoDBImpl) Open() error {
+	cli, err := mongo.Connect(context.Background(), options.Client().ApplyURI(db.uri))
+	if err != nil {
+		return errors.Wrap(err, "open mongo connection error")
+	}
+	db.mongo = cli.Database(db.db)
+	return nil
+}
+
+func (db *MongoDBImpl) GetMessageByGlobalID(id int32) (IStoredMessage, error) {
+	if r, err := db.GetGroupMessageByGlobalID(id); err == nil {
+		return r, nil
+	}
+	return db.GetPrivateMessageByGlobalID(id)
+}
+
+func (db *MongoDBImpl) GetGroupMessageByGlobalID(id int32) (*StoredGroupMessage, error) {
+	coll := db.mongo.Collection(MongoGroupMessageCollection)
+	var ret StoredGroupMessage
+	if err := coll.FindOne(context.Background(), bson.D{{"globalId", id}}).Decode(&ret); err != nil {
+		return nil, errors.Wrap(err, "query error")
+	}
+	return &ret, nil
+}
+
+func (db *MongoDBImpl) GetPrivateMessageByGlobalID(id int32) (*StoredPrivateMessage, error) {
+	coll := db.mongo.Collection(MongoPrivateMessageCollection)
+	var ret StoredPrivateMessage
+	if err := coll.FindOne(context.Background(), bson.D{{"globalId", id}}).Decode(&ret); err != nil {
+		return nil, errors.Wrap(err, "query error")
+	}
+	return &ret, nil
+}
+
+func (db *MongoDBImpl) InsertGroupMessage(msg *StoredGroupMessage) error {
+	coll := db.mongo.Collection(MongoGroupMessageCollection)
+	_, err := coll.InsertOne(context.Background(), msg)
+	return errors.Wrap(err, "insert error")
+}
+
+func (db *MongoDBImpl) InsertPrivateMessage(msg *StoredPrivateMessage) error {
+	coll := db.mongo.Collection(MongoPrivateMessageCollection)
+	_, err := coll.InsertOne(context.Background(), msg)
+	return errors.Wrap(err, "insert error")
+}

db/multidb.go

@@ -0,0 +1,68 @@
+package db
+
+import "github.com/pkg/errors"
+
+// MultiDBImpl 多数据库支持
+// 写入会对所有 Backend 进行写入
+// 读取只会读取第一个库
+type MultiDBImpl struct {
+	backends []IDatabase
+}
+
+func NewMultiDatabase(backends ...IDatabase) *MultiDBImpl {
+	return &MultiDBImpl{
+		backends: backends,
+	}
+}
+
+func (db *MultiDBImpl) UseDB(backend IDatabase) {
+	db.backends = append(db.backends, backend)
+}
+
+func (db *MultiDBImpl) Open() error {
+	for _, b := range db.backends {
+		if err := b.Open(); err != nil {
+			return errors.Wrap(err, "open backend error")
+		}
+	}
+	return nil
+}
+
+func (db *MultiDBImpl) GetMessageByGlobalID(id int32) (IStoredMessage, error) {
+	if len(db.backends) == 0 {
+		return nil, errors.New("database disabled")
+	}
+	return db.backends[0].GetMessageByGlobalID(id)
+}
+
+func (db *MultiDBImpl) GetGroupMessageByGlobalID(id int32) (*StoredGroupMessage, error) {
+	if len(db.backends) == 0 {
+		return nil, errors.New("database disabled")
+	}
+	return db.backends[0].GetGroupMessageByGlobalID(id)
+}
+
+func (db *MultiDBImpl) GetPrivateMessageByGlobalID(id int32) (*StoredPrivateMessage, error) {
+	if len(db.backends) == 0 {
+		return nil, errors.New("database disabled")
+	}
+	return db.backends[0].GetPrivateMessageByGlobalID(id)
+}
+
+func (db *MultiDBImpl) InsertGroupMessage(m *StoredGroupMessage) error {
+	for _, b := range db.backends {
+		if err := b.InsertGroupMessage(m); err != nil {
+			return errors.Wrap(err, "insert message to backend error")
+		}
+	}
+	return nil
+}
+
+func (db *MultiDBImpl) InsertPrivateMessage(m *StoredPrivateMessage) error {
+	for _, b := range db.backends {
+		if err := b.InsertPrivateMessage(m); err != nil {
+			return errors.Wrap(err, "insert message to backend error")
+		}
+	}
+	return nil
+}

go.mod

@@ -23,6 +23,7 @@ require (
 	github.com/tidwall/gjson v1.8.1
 	github.com/tuotoo/qrcode v0.0.0-20190222102259-ac9c44189bf2
 	github.com/wdvxdr1123/go-silk v0.0.0-20210316130616-d47b553def60
+	go.mongodb.org/mongo-driver v1.7.2
 	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5
 	golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b
 	golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac
@@ -32,7 +33,8 @@ require (
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db // indirect
+	github.com/go-stack/stack v1.8.0 // indirect
+	github.com/golang/snappy v0.0.1 // indirect
 	github.com/google/uuid v1.1.1 // indirect
 	github.com/gorilla/websocket v1.4.2 // indirect
 	github.com/jonboulle/clockwork v0.2.2 // indirect
@@ -46,9 +48,14 @@ require (
 	github.com/tidwall/match v1.0.3 // indirect
 	github.com/tidwall/pretty v1.1.0 // indirect
 	github.com/willf/bitset v1.2.0 // indirect
+	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
+	github.com/xdg-go/scram v1.0.2 // indirect
+	github.com/xdg-go/stringprep v1.0.2 // indirect
+	github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d // indirect
 	golang.org/x/net v0.0.0-20211015210444-4f30a5c0130f // indirect
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
 	golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1 // indirect
+	golang.org/x/text v0.3.6 // indirect
 	google.golang.org/protobuf v1.27.1 // indirect
 	modernc.org/libc v1.8.1 // indirect
 	modernc.org/mathutil v1.2.2 // indirect

go.sum

@@ -1,5 +1,6 @@
 github.com/Baozisoftware/qrcode-terminal-go v0.0.0-20170407111555-c0650d8dff0f h1:2dk3eOnYllh+wUOuDhOoC2vUVoJF/5z478ryJ+wzEII=
 github.com/Baozisoftware/qrcode-terminal-go v0.0.0-20170407111555-c0650d8dff0f/go.mod h1:4a58ifQTEe2uwwsaqbh3i2un5/CBPg+At/qHpt18Tmk=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/Microsoft/go-winio v0.5.1 h1:aPJp2QD7OOrhO5tQXqQoGSJc+DjDtWTGLOmNyAm6FgY=
 github.com/Microsoft/go-winio v0.5.1/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
 github.com/Mrs4s/MiraiGo v0.0.0-20211016141121-3b85d69fd3e1 h1:KED5vry8RkK1oVmXjaL2mKikuZDxYGQKZ9uqQI7cHoc=
@@ -27,6 +28,32 @@ github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD87
 github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
 github.com/go-playground/validator/v10 v10.2.0 h1:KgJ0snyC2R9VXYN2rneOtQcw5aHQB1Vv0sFl1UcHBOY=
 github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GOhaH6EGOAJShg8Id5JGkI=
+github.com/go-stack/stack v1.8.0 h1:5SgMzNM5HxrEjV0ww2lTmX6E2Izsfxas4+YHWRs3Lsk=
+github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
+github.com/gobuffalo/attrs v0.0.0-20190224210810-a9411de4debd/go.mod h1:4duuawTqi2wkkpB4ePgWMaai6/Kc6WEz83bhFwpHzj0=
+github.com/gobuffalo/depgen v0.0.0-20190329151759-d478694a28d3/go.mod h1:3STtPUQYuzV0gBVOY3vy6CfMm/ljR4pABfrTeHNLHUY=
+github.com/gobuffalo/depgen v0.1.0/go.mod h1:+ifsuy7fhi15RWncXQQKjWS9JPkdah5sZvtHc2RXGlg=
+github.com/gobuffalo/envy v1.6.15/go.mod h1:n7DRkBerg/aorDM8kbduw5dN3oXGswK5liaSCx4T5NI=
+github.com/gobuffalo/envy v1.7.0/go.mod h1:n7DRkBerg/aorDM8kbduw5dN3oXGswK5liaSCx4T5NI=
+github.com/gobuffalo/flect v0.1.0/go.mod h1:d2ehjJqGOH/Kjqcoz+F7jHTBbmDb38yXA598Hb50EGs=
+github.com/gobuffalo/flect v0.1.1/go.mod h1:8JCgGVbRjJhVgD6399mQr4fx5rRfGKVzFjbj6RE/9UI=
+github.com/gobuffalo/flect v0.1.3/go.mod h1:8JCgGVbRjJhVgD6399mQr4fx5rRfGKVzFjbj6RE/9UI=
+github.com/gobuffalo/genny v0.0.0-20190329151137-27723ad26ef9/go.mod h1:rWs4Z12d1Zbf19rlsn0nurr75KqhYp52EAGGxTbBhNk=
+github.com/gobuffalo/genny v0.0.0-20190403191548-3ca520ef0d9e/go.mod h1:80lIj3kVJWwOrXWWMRzzdhW3DsrdjILVil/SFKBzF28=
+github.com/gobuffalo/genny v0.1.0/go.mod h1:XidbUqzak3lHdS//TPu2OgiFB+51Ur5f7CSnXZ/JDvo=
+github.com/gobuffalo/genny v0.1.1/go.mod h1:5TExbEyY48pfunL4QSXxlDOmdsD44RRq4mVZ0Ex28Xk=
+github.com/gobuffalo/gitgen v0.0.0-20190315122116-cc086187d211/go.mod h1:vEHJk/E9DmhejeLeNt7UVvlSGv3ziL+djtTr3yyzcOw=
+github.com/gobuffalo/gogen v0.0.0-20190315121717-8f38393713f5/go.mod h1:V9QVDIxsgKNZs6L2IYiGR8datgMhB577vzTDqypH360=
+github.com/gobuffalo/gogen v0.1.0/go.mod h1:8NTelM5qd8RZ15VjQTFkAW6qOMx5wBbW4dSCS3BY8gg=
+github.com/gobuffalo/gogen v0.1.1/go.mod h1:y8iBtmHmGc4qa3urIyo1shvOD8JftTtfcKi+71xfDNE=
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@@ -38,9 +65,11 @@ github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaW
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@@ -52,17 +81,29 @@ github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0U
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@@ -71,6 +112,8 @@ github.com/lestrrat-go/file-rotatelogs v2.4.0+incompatible h1:Y6sqxHMyB1D2YSzWkL
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@@ -81,11 +124,14 @@ github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 h1:ZqeYNhU3OH
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@@ -93,17 +139,27 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
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@@ -112,6 +168,7 @@ github.com/tidwall/gjson v1.8.1 h1:8j5EE9Hrh3l9Od1OIEDAb7IpezNA20UdRngNAj5N0WU=
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@@ -122,17 +179,44 @@ github.com/ugorji/go/codec v1.1.7 h1:2SvQaVZ1ouYrrKKwoSk2pzd4A9evlKJb9oTL+OaLUSs
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 golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 h1:HWj/xjIHfjYU5nVXpTM0s39J9CbLn7Cc5a7IC5rwsMQ=
 golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
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+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190531175056-4c3a928424d2/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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@@ -148,19 +232,26 @@ golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b/go.mod h1:jbD1KX2456YbFQfuX
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
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+golang.org/x/tools v0.0.0-20190329151228-23e29df326fe/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
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+golang.org/x/tools v0.0.0-20190531172133-b3315ee88b7d/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
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-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
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internal/btree/btree.go

@@ -0,0 +1,524 @@
+// Package btree provide a disk-based btree
+package btree
+
+import (
+	"io"
+	"math/rand"
+	"os"
+	"unsafe"
+
+	"github.com/pkg/errors"
+)
+
+const (
+	hashSize        = 16 // md5 hash
+	tableSize       = (1024 - 1) / int(unsafe.Sizeof(item{}))
+	cacheSlots      = 11 // prime
+	superSize       = int(unsafe.Sizeof(super{}))
+	tableStructSize = int(unsafe.Sizeof(table{}))
+)
+
+type item struct {
+	hash   [hashSize]byte
+	offset int64
+	child  int64
+}
+
+type table struct {
+	items [tableSize]item
+	size  int
+}
+
+type cache struct {
+	table  *table
+	offset int64
+}
+
+type super struct {
+	top     int64
+	freeTop int64
+	alloc   int64
+}
+
+// DB ...
+type DB struct {
+	fd      *os.File
+	top     int64
+	freeTop int64
+	alloc   int64
+	cache   [cacheSlots]cache
+
+	inAllocator  bool
+	deleteLarger bool
+	fqueue       [freeQueueLen]chunk
+	fqueueLen    int
+}
+
+func (d *DB) get(offset int64) *table {
+	assert(offset != 0)
+
+	// take from cache
+	slot := &d.cache[offset%cacheSlots]
+	if slot.offset == offset {
+		return slot.table
+	}
+
+	table := new(table)
+
+	d.fd.Seek(offset, io.SeekStart)
+	err := readTable(d.fd, table)
+	if err != nil {
+		panic(errors.Wrap(err, "btree I/O error"))
+	}
+	return table
+}
+
+func (d *DB) put(t *table, offset int64) {
+	assert(offset != 0)
+
+	// overwrite cache
+	slot := &d.cache[offset%cacheSlots]
+	slot.table = t
+	slot.offset = offset
+}
+
+func (d *DB) flush(t *table, offset int64) {
+	assert(offset != 0)
+
+	d.fd.Seek(offset, io.SeekStart)
+	err := writeTable(d.fd, t)
+	if err != nil {
+		panic(errors.Wrap(err, "btree I/O error"))
+	}
+	d.put(t, offset)
+}
+
+func (d *DB) flushSuper() {
+	d.fd.Seek(0, io.SeekStart)
+	super := super{
+		top:     d.top,
+		freeTop: d.freeTop,
+		alloc:   d.alloc,
+	}
+	err := writeSuper(d.fd, &super)
+	if err != nil {
+		panic(errors.Wrap(err, "btree I/O error"))
+	}
+}
+
+// Open opens an existed btree file
+func Open(name string) (*DB, error) {
+	btree := new(DB)
+	fd, err := os.OpenFile(name, os.O_RDWR, 0o644)
+	if err != nil {
+		return nil, errors.Wrap(err, "btree open file failed")
+	}
+	btree.fd = fd
+
+	super := super{}
+	err = readSuper(fd, &super)
+	btree.top = super.top
+	btree.freeTop = super.freeTop
+	btree.alloc = super.alloc
+	return btree, errors.Wrap(err, "btree read meta info failed")
+}
+
+// Create creates a database
+func Create(name string) (*DB, error) {
+	btree := new(DB)
+	fd, err := os.OpenFile(name, os.O_RDWR|os.O_TRUNC|os.O_CREATE, 0o644)
+	if err != nil {
+		return nil, errors.Wrap(err, "btree open file failed")
+	}
+
+	btree.fd = fd
+	btree.alloc = int64(superSize)
+	btree.flushSuper()
+	return btree, nil
+}
+
+// Close closes the database
+func (d *DB) Close() error {
+	_ = d.fd.Sync()
+	err := d.fd.Close()
+	for i := 0; i < cacheSlots; i++ {
+		d.cache[i] = cache{}
+	}
+	return errors.Wrap(err, "btree close failed")
+}
+
+func collapse(bt *DB, offset int64) int64 {
+	table := bt.get(offset)
+	if table.size != 0 {
+		/* unable to collapse */
+		bt.put(table, offset)
+		return offset
+	}
+	ret := table.items[0].child
+	bt.put(table, offset)
+
+	/*
+	 * WARNING: this is dangerous as the chunk is added to allocation tree
+	 * before the references to it are removed!
+	 */
+	bt.freeChunk(offset, int(unsafe.Sizeof(table)))
+	return ret
+}
+
+// split a table. The pivot item is stored to 'hash' and 'offset'.
+// Returns offset to the new table.
+func (d *DB) split(t *table, hash *byte, offset *int64) int64 {
+	copyhash(hash, &t.items[tableSize/2].hash[0])
+	*offset = t.items[tableSize/2].offset
+
+	ntable := new(table)
+	ntable.size = t.size - tableSize/2 - 1
+
+	t.size = tableSize / 2
+
+	copy(ntable.items[:ntable.size+1], t.items[tableSize/2+1:])
+
+	noff := d.allocChunk(tableStructSize)
+	d.flush(ntable, noff)
+
+	// make sure data is written before a reference is added to it
+	_ = d.fd.Sync()
+	return noff
+}
+
+// takeSmallest find and remove the smallest item from the given table. The key of the item
+// is stored to 'hash'. Returns offset to the item
+func (d *DB) takeSmallest(toff int64, sha1 *byte) int64 {
+	table := d.get(toff)
+	assert(table.size > 0)
+
+	var off int64
+	child := table.items[0].child
+	if child == 0 {
+		off = d.remove(table, 0, sha1)
+	} else {
+		/* recursion */
+		off = d.takeSmallest(child, sha1)
+		table.items[0].child = collapse(d, child)
+	}
+	d.flush(table, toff)
+
+	// make sure data is written before a reference is added to it
+	_ = d.fd.Sync()
+	return off
+}
+
+// takeLargest find and remove the largest item from the given table. The key of the item
+// is stored to 'hash'. Returns offset to the item
+func (d *DB) takeLargest(toff int64, hash *byte) int64 {
+	table := d.get(toff)
+	assert(table.size > 0)
+
+	var off int64
+	child := table.items[table.size].child
+	if child == 0 {
+		off = d.remove(table, table.size-1, hash)
+	} else {
+		/* recursion */
+		off = d.takeLargest(child, hash)
+		table.items[table.size].child = collapse(d, child)
+	}
+	d.flush(table, toff)
+
+	// make sure data is written before a reference is added to it
+	_ = d.fd.Sync()
+	return off
+}
+
+// remove an item in position 'i' from the given table. The key of the
+// removed item is stored to 'hash'. Returns offset to the item.
+func (d *DB) remove(t *table, i int, hash *byte) int64 {
+	assert(i < t.size)
+
+	if hash != nil {
+		copyhash(hash, &t.items[i].hash[0])
+	}
+
+	offset := t.items[i].offset
+	lc := t.items[i].child
+	rc := t.items[i+1].child
+
+	if lc != 0 && rc != 0 {
+		/* replace the removed item by taking an item from one of the
+		   child tables */
+		var noff int64
+		if rand.Int()&1 != 0 {
+			noff = d.takeLargest(lc, &t.items[i].hash[0])
+			t.items[i].child = collapse(d, lc)
+		} else {
+			noff = d.takeSmallest(rc, &t.items[i].hash[0])
+			t.items[i+1].child = collapse(d, rc)
+		}
+		t.items[i].child = noff
+	} else {
+		// memmove(&table->items[i], &table->items[i + 1],
+		//	(table->size - i) * sizeof(struct btree_item));
+		copy(t.items[i:], t.items[i+1:])
+		t.size--
+
+		if lc != 0 {
+			t.items[i].child = lc
+		} else {
+			t.items[i].child = rc
+		}
+	}
+	return offset
+}
+
+func (d *DB) insert(toff int64, hash *byte, data []byte, size int) int64 {
+	table := d.get(toff)
+	assert(table.size < tableSize-1)
+
+	left, right := 0, table.size
+	for left < right {
+		mid := (right-left)>>1 + left
+		switch cmp := cmp(hash, &table.items[mid].hash[0]); {
+		case cmp == 0:
+			// already in the table
+			ret := table.items[mid].offset
+			d.put(table, toff)
+			return ret
+		case cmp < 0:
+			right = mid
+		default:
+			left = mid + 1
+		}
+	}
+	i := left
+
+	var off, rc, ret int64
+	lc := table.items[i].child
+	if lc != 0 {
+		/* recursion */
+		ret = d.insert(lc, hash, data, size)
+
+		/* check if we need to split */
+		child := d.get(lc)
+		if child.size < tableSize-1 {
+			/* nothing to do */
+			d.put(table, toff)
+			d.put(child, lc)
+			return ret
+		}
+		/* overwrites SHA-1 */
+		rc = d.split(child, hash, &off)
+		/* flush just in case changes happened */
+		d.flush(child, lc)
+
+		// make sure data is written before a reference is added to it
+		_ = d.fd.Sync()
+	} else {
+		off = d.insertData(data, size)
+		ret = off
+	}
+
+	table.size++
+	// memmove(&table->items[i + 1], &table->items[i],
+	//  (table->size - i) * sizeof(struct btree_item));
+	copy(table.items[i+1:], table.items[i:])
+	copyhash(&table.items[i].hash[0], hash)
+	table.items[i].offset = off
+	table.items[i].child = lc
+	table.items[i+1].child = rc
+
+	d.flush(table, toff)
+	return ret
+}
+
+func (d *DB) insertData(data []byte, size int) int64 {
+	if data == nil {
+		return int64(size)
+	}
+	assert(len(data) == size)
+
+	offset := d.allocChunk(4 + len(data))
+
+	d.fd.Seek(offset, io.SeekStart)
+	err := write32(d.fd, int32(len(data)))
+	if err != nil {
+		panic(errors.Wrap(err, "btree I/O error"))
+	}
+	_, err = d.fd.Write(data)
+	if err != nil {
+		panic(errors.Wrap(err, "btree I/O error"))
+	}
+
+	// make sure data is written before a reference is added to it
+	_ = d.fd.Sync()
+	return offset
+}
+
+// delete remove an item with key 'hash' from the given table. The offset to the
+// removed item is returned.
+// Please note that 'hash' is overwritten when called inside the allocator.
+func (d *DB) delete(offset int64, hash *byte) int64 {
+	if offset == 0 {
+		return 0
+	}
+	table := d.get(offset)
+
+	left, right := 0, table.size
+	for left < right {
+		i := (right-left)>>1 + left
+		switch cmp := cmp(hash, &table.items[i].hash[0]); {
+		case cmp == 0:
+			// found
+			ret := d.remove(table, i, hash)
+			d.flush(table, offset)
+			return ret
+		case cmp < 0:
+			right = i
+		default:
+			left = i + 1
+		}
+	}
+
+	// not found - recursion
+	i := left
+	child := table.items[i].child
+	ret := d.delete(child, hash)
+	if ret != 0 {
+		table.items[i].child = collapse(d, child)
+	}
+
+	if ret == 0 && d.deleteLarger && i < table.size {
+		ret = d.remove(table, i, hash)
+	}
+	if ret != 0 {
+		/* flush just in case changes happened */
+		d.flush(table, offset)
+	} else {
+		d.put(table, offset)
+	}
+	return ret
+}
+
+func (d *DB) insertTopLevel(toff *int64, hash *byte, data []byte, size int) int64 { // nolint:unparam
+	var off, ret, rc int64
+	if *toff != 0 {
+		ret = d.insert(*toff, hash, data, size)
+
+		/* check if we need to split */
+		table := d.get(*toff)
+		if table.size < tableSize-1 {
+			/* nothing to do */
+			d.put(table, *toff)
+			return ret
+		}
+		rc = d.split(table, hash, &off)
+		d.flush(table, *toff)
+	} else {
+		off = d.insertData(data, size)
+		ret = off
+	}
+
+	/* create new top level table */
+	t := new(table)
+	t.size = 1
+	copyhash(&t.items[0].hash[0], hash)
+	t.items[0].offset = off
+	t.items[0].child = *toff
+	t.items[1].child = rc
+
+	ntoff := d.allocChunk(tableStructSize)
+	d.flush(t, ntoff)
+
+	*toff = ntoff
+
+	// make sure data is written before a reference is added to it
+	_ = d.fd.Sync()
+	return ret
+}
+
+func (d *DB) lookup(toff int64, hash *byte) int64 {
+	if toff == 0 {
+		return 0
+	}
+	table := d.get(toff)
+
+	left, right := 0, table.size
+	for left < right {
+		mid := (right-left)>>1 + left
+		switch cmp := cmp(hash, &table.items[mid].hash[0]); {
+		case cmp == 0:
+			// found
+			ret := table.items[mid].offset
+			d.put(table, toff)
+			return ret
+		case cmp < 0:
+			right = mid
+		default:
+			left = mid + 1
+		}
+	}
+
+	i := left
+	child := table.items[i].child
+	d.put(table, toff)
+	return d.lookup(child, hash)
+}
+
+// Insert a new item with key 'hash' with the contents in 'data' to the
+// database file.
+func (d *DB) Insert(chash *byte, data []byte) {
+	/* SHA-1 must be in writable memory */
+	var hash [hashSize]byte
+	copyhash(&hash[0], chash)
+
+	_ = d.insertTopLevel(&d.top, &hash[0], data, len(data))
+	freeQueued(d)
+	d.flushSuper()
+}
+
+// Get look up item with the given key 'hash' in the database file. Length of the
+// item is stored in 'len'. Returns a pointer to the contents of the item.
+// The returned pointer should be released with free() after use.
+func (d *DB) Get(hash *byte) []byte {
+	off := d.lookup(d.top, hash)
+	if off == 0 {
+		return nil
+	}
+
+	d.fd.Seek(off, io.SeekStart)
+	length, err := read32(d.fd)
+	if err != nil {
+		return nil
+	}
+	data := make([]byte, length)
+	n, err := io.ReadFull(d.fd, data)
+	if err != nil {
+		return nil
+	}
+	return data[:n]
+}
+
+// Delete remove item with the given key 'hash' from the database file.
+func (d *DB) Delete(hash *byte) error {
+	var h [hashSize]byte
+	copyhash(&h[0], hash)
+
+	off := d.delete(d.top, &h[0])
+	if off == 0 {
+		return nil // not found key
+	}
+
+	d.top = collapse(d, d.top)
+	freeQueued(d)
+	d.flushSuper()
+
+	d.fd.Seek(off, io.SeekStart)
+	length, err := read32(d.fd) // len: 0
+	if err != nil {
+		return errors.Wrap(err, "btree I/O error")
+	}
+
+	d.freeChunk(off, int(length+4))
+	freeQueued(d)
+	d.flushSuper()
+	return nil
+}

internal/btree/btree_test.go

@@ -0,0 +1,61 @@
+package btree
+
+import (
+	"crypto/sha1"
+	"os"
+	"testing"
+
+	assert2 "github.com/stretchr/testify/assert"
+)
+
+func tempfile(t *testing.T) string {
+	temp, err := os.CreateTemp(".", "temp.*.db")
+	assert2.NoError(t, temp.Close())
+	assert2.NoError(t, err)
+	return temp.Name()
+}
+
+func TestCreate(t *testing.T) {
+	f := tempfile(t)
+	_, err := Create(f)
+	assert2.NoError(t, err)
+	defer os.Remove(f)
+}
+
+func TestBtree(t *testing.T) {
+	f := tempfile(t)
+	defer os.Remove(f)
+	bt, err := Create(f)
+	assert2.NoError(t, err)
+
+	var tests = []string{
+		"hello world",
+		"123",
+		"We are met on a great battle-field of that war.",
+		"Abraham Lincoln, November 19, 1863, Gettysburg, Pennsylvania",
+	}
+	var sha = make([]*byte, len(tests))
+	for i, tt := range tests {
+		var hash = sha1.New()
+		hash.Write([]byte(tt))
+		sha[i] = &hash.Sum(nil)[0]
+		bt.Insert(sha[i], []byte(tt))
+	}
+	assert2.NoError(t, bt.Close())
+
+	bt, err = Open(f)
+	assert2.NoError(t, err)
+	for i, tt := range tests {
+		assert2.Equal(t, []byte(tt), bt.Get(sha[i]))
+	}
+
+	for i := range tests {
+		assert2.NoError(t, bt.Delete(sha[i]))
+	}
+
+	for i := range tests {
+		assert2.Equal(t, []byte(nil), bt.Get(sha[i]))
+	}
+
+	assert2.NoError(t, bt.Close())
+}

internal/btree/chunk.go

@@ -0,0 +1,122 @@
+package btree
+
+import (
+	"math/rand"
+	"unsafe"
+)
+
+type chunk struct {
+	offset int64
+	len    int
+}
+
+const freeQueueLen = 64
+
+func freeQueued(bt *DB) {
+	for i := 0; i < bt.fqueueLen; i++ {
+		chunk := &bt.fqueue[i]
+		bt.freeChunk(chunk.offset, chunk.len)
+	}
+	bt.fqueueLen = 0
+}
+
+func (d *DB) allocChunk(size int) int64 {
+	assert(size > 0)
+
+	size = power2(size)
+
+	var offset int64
+	if d.inAllocator {
+		const i32s = unsafe.Sizeof(int32(0))
+
+		/* create fake size SHA-1 */
+		var sha1 [hashSize]byte
+		p := unsafe.Pointer(&sha1[0])
+		*(*int32)(p) = -1                              // *(uint32_t *) hash = -1;
+		*(*uint32)(unsafe.Add(p, i32s)) = uint32(size) // ((__be32 *) hash)[1] = to_be32(size);
+
+		/* find free chunk with the larger or the same size/SHA-1 */
+		d.inAllocator = true
+		d.deleteLarger = true
+		offset = d.delete(d.freeTop, &sha1[0])
+		d.deleteLarger = false
+		if offset != 0 {
+			assert(*(*int32)(p) == -1)                   // assert(*(uint32_t *) hash == (uint32_t) -1)
+			flen := int(*(*uint32)(unsafe.Add(p, i32s))) // size_t free_len = from_be32(((__be32 *) hash)[1])
+			assert(power2(flen) == flen)
+			assert(flen >= size)
+
+			/* delete buddy information */
+			resethash(&sha1[0])
+			*(*int64)(p) = offset
+			buddyLen := d.delete(d.freeTop, &sha1[0])
+			assert(buddyLen == int64(size))
+
+			d.freeTop = collapse(d, d.freeTop)
+
+			d.inAllocator = false
+
+			/* free extra space at the end of the chunk */
+			for flen > size {
+				flen >>= 1
+				d.freeChunk(offset+int64(flen), flen)
+			}
+		} else {
+			d.inAllocator = false
+		}
+	}
+	if offset == 0 {
+		/* not found, allocate from the end of the file */
+		offset = d.alloc
+		/* TODO: this wastes memory.. */
+		if offset&int64(size-1) != 0 {
+			offset += int64(size) - (offset & (int64(size) - 1))
+		}
+		d.alloc = offset + int64(size)
+	}
+	d.flushSuper()
+
+	// make sure the allocation tree is up-to-date before using the chunk
+	_ = d.fd.Sync()
+	return offset
+}
+
+/* Mark a chunk as unused in the database file */
+func (d *DB) freeChunk(offset int64, size int) {
+	assert(size > 0)
+	assert(offset != 0)
+	size = power2(size)
+	assert(offset&int64(size-1) == 0)
+
+	if d.inAllocator {
+		chunk := &d.fqueue[d.fqueueLen]
+		d.fqueueLen++
+		chunk.offset = offset
+		chunk.len = size
+		return
+	}
+
+	/* create fake offset SHA-1 for buddy allocation */
+	var sha1 [hashSize]byte
+	p := unsafe.Pointer(&sha1[0])
+	d.inAllocator = true
+
+	const i32s = unsafe.Sizeof(int32(0))
+
+	/* add buddy information */
+	resethash(&sha1[0])
+	*(*int32)(p) = -1                                 // *(uint32_t *) hash = -1;
+	*(*uint32)(unsafe.Add(p, i32s)) = uint32(size)    // ((__be32 *) hash)[1] = to_be32(size);
+	*(*uint32)(unsafe.Add(p, i32s*2)) = rand.Uint32() /* to make SHA-1 unique */
+	*(*uint32)(unsafe.Add(p, i32s*3)) = rand.Uint32()
+
+	// insert_toplevel(btree, &btree->free_top, hash, NULL, offset);
+	_ = d.insertTopLevel(&d.freeTop, &sha1[0], nil, int(offset))
+	d.inAllocator = false
+
+	d.flushSuper()
+
+	// make sure the allocation tree is up-to-date before removing
+	// references to the chunk
+	_ = d.fd.Sync()
+}

internal/btree/helper.go

@@ -0,0 +1,106 @@
+package btree
+
+import (
+	"io"
+	"reflect"
+	"unsafe"
+)
+
+func assert(cond bool) {
+	if !cond {
+		panic("assert failed!")
+	}
+}
+
+// power2 returns a value that is greater or equal to 'val' and is power-of-two.
+func power2(val int) int {
+	i := 1
+	for i < val {
+		i <<= 1
+	}
+	return i
+}
+
+// helpers for hash
+
+func cmp(a, b *byte) int64 {
+	pa, pb := unsafe.Pointer(a), unsafe.Pointer(b)
+	if *(*uint64)(pa) != *(*uint64)(pb) {
+		return int64(*(*uint64)(pa) - *(*uint64)(pb))
+	}
+	pa, pb = unsafe.Add(pa, 8), unsafe.Add(pb, 8)
+	return int64(*(*uint64)(pa) - *(*uint64)(pb))
+}
+
+func copyhash(dst *byte, src *byte) {
+	pa, pb := unsafe.Pointer(dst), unsafe.Pointer(src)
+	*(*[hashSize]byte)(pa) = *(*[hashSize]byte)(pb)
+}
+
+func resethash(sha1 *byte) {
+	p := unsafe.Pointer(sha1)
+	*(*[hashSize]byte)(p) = [hashSize]byte{}
+}
+
+// reading table
+
+func read32(r io.Reader) (int32, error) {
+	var b = make([]byte, 4)
+	_, err := r.Read(b)
+	if err != nil {
+		return 0, err
+	}
+	return *(*int32)(unsafe.Pointer(&b[0])), nil
+}
+
+func readTable(r io.Reader, t *table) error {
+	buf := make([]byte, tableStructSize)
+	_, err := r.Read(buf)
+	if err != nil {
+		return err
+	}
+	*t = *(*table)(unsafe.Pointer(&buf[0]))
+	return nil
+}
+
+func readSuper(r io.Reader, s *super) error {
+	buf := make([]byte, superSize)
+	_, err := r.Read(buf)
+	if err != nil {
+		return err
+	}
+	*s = *(*super)(unsafe.Pointer(&buf[0]))
+	return nil
+}
+
+// write table
+
+func write32(w io.Writer, t int32) error {
+	var p []byte
+	ph := (*reflect.SliceHeader)(unsafe.Pointer(&p))
+	ph.Data = uintptr(unsafe.Pointer(&t))
+	ph.Len = 4
+	ph.Cap = 4
+	_, err := w.Write(p)
+	return err
+}
+
+func writeTable(w io.Writer, t *table) error {
+	var p []byte
+	ph := (*reflect.SliceHeader)(unsafe.Pointer(&p))
+	ph.Data = uintptr(unsafe.Pointer(t))
+	ph.Len = tableStructSize
+	ph.Cap = tableStructSize
+	_, err := w.Write(p)
+	return err
+}
+
+func writeSuper(w io.Writer, s *super) error {
+	var p []byte
+	ph := (*reflect.SliceHeader)(unsafe.Pointer(&p))
+	ph.Data = uintptr(unsafe.Pointer(s))
+	ph.Len = superSize
+	ph.Cap = superSize
+	_, err := w.Write(p)
+	return err
+}

internal/cache/cache.go

@@ -0,0 +1,97 @@
+// Package cache impl the cache for gocq
+package cache
+
+import (
+	"fmt"
+	"sync"
+
+	log "github.com/sirupsen/logrus"
+
+	"github.com/Mrs4s/go-cqhttp/global"
+	"github.com/Mrs4s/go-cqhttp/internal/base"
+	"github.com/Mrs4s/go-cqhttp/internal/btree"
+)
+
+// todo(wdvxdr): always enable db-cache in v1.0.0
+
+// EnableCacheDB 是否启用 btree db缓存图片等
+var EnableCacheDB bool
+
+// Media Cache DBs
+var (
+	Image Cache
+	Video Cache
+	// todo: Voice?
+)
+
+// Cache wraps the btree.DB for concurrent safe
+type Cache struct {
+	lock sync.RWMutex
+	db   *btree.DB
+}
+
+// Insert 添加媒体缓存
+func (c *Cache) Insert(md5, data []byte) {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	var hash [16]byte
+	copy(hash[:], md5)
+	c.db.Insert(&hash[0], data)
+}
+
+// Get 获取缓存信息
+func (c *Cache) Get(md5 []byte) []byte {
+	c.lock.RLock()
+	defer c.lock.RUnlock()
+
+	var hash [16]byte
+	copy(hash[:], md5)
+	return c.db.Get(&hash[0])
+}
+
+// Delete 删除指定缓存
+func (c *Cache) Delete(md5 []byte) {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	var hash [16]byte
+	copy(hash[:], md5)
+	_ = c.db.Delete(&hash[0])
+}
+
+// Init 初始化 Cache
+func Init() {
+	node, ok := base.Database["cache"]
+	if !ok {
+		return
+	}
+	EnableCacheDB = true
+	var conf map[string]string
+	err := node.Decode(&conf)
+	if err != nil {
+		log.Fatalf("failed to read cache config: %v", err)
+	}
+
+	var open = func(typ string, cache *Cache) {
+		file := conf[typ]
+		if file == "" {
+			file = fmt.Sprintf("data/%s.db", typ)
+		}
+		if global.PathExists(file) {
+			db, err := btree.Open(file)
+			if err != nil {
+				log.Fatalf("open %s cache failed: %v", typ, err)
+			}
+			cache.db = db
+		} else {
+			db, err := btree.Create(file)
+			if err != nil {
+				log.Fatalf("create %s cache failed: %v", typ, err)
+			}
+			cache.db = db
+		}
+	}
+	open("image", &Image)
+	open("video", &Video)
+}

main.go

@@ -10,8 +10,6 @@ import (
 	"sync"
 	"time"
 
-	"github.com/Mrs4s/go-cqhttp/internal/selfdiagnosis"
-
 	"github.com/Mrs4s/MiraiGo/binary"
 	"github.com/Mrs4s/MiraiGo/client"
 	para "github.com/fumiama/go-hide-param"
@@ -24,6 +22,8 @@ import (
 	"github.com/Mrs4s/go-cqhttp/global"
 	"github.com/Mrs4s/go-cqhttp/global/terminal"
 	"github.com/Mrs4s/go-cqhttp/internal/base"
+	"github.com/Mrs4s/go-cqhttp/internal/cache"
+	"github.com/Mrs4s/go-cqhttp/internal/selfdiagnosis"
 	"github.com/Mrs4s/go-cqhttp/internal/selfupdate"
 	"github.com/Mrs4s/go-cqhttp/modules/servers"
 	"github.com/Mrs4s/go-cqhttp/server"
@@ -82,6 +82,7 @@ func main() {
 	mkCacheDir(global.VoicePath, "语音")
 	mkCacheDir(global.VideoPath, "视频")
 	mkCacheDir(global.CachePath, "发送图片")
+	cache.Init()
 
 	var byteKey []byte
 	arg := os.Args

modules/config/config.go

@@ -137,6 +137,13 @@ type LevelDBConfig struct {
 	Enable bool `yaml:"enable"`
 }
 
+// MongoDBConfig mongodb 相关配置
+type MongoDBConfig struct {
+	Enable   bool   `yaml:"enable"`
+	URI      string `yaml:"uri"`
+	Database string `yaml:"database"`
+}
+
 // Parse 从默认配置文件路径中获取
 func Parse(path string) *Config {
 	fromEnv := os.Getenv("GCQ_UIN") != ""

modules/config/default_config.yml

@@ -75,6 +75,11 @@ database: # 数据库相关设置
     # 关闭将无法使用 撤回 回复 get_msg 等上下文相关功能
     enable: true
 
+  # 媒体文件缓存， 删除此项则使用缓存文件(旧版行为)
+  cache:
+    image: data/image.db
+    video: data/video.db
+
 # 连接服务列表
 servers:
   # 添加方式，同一连接方式可添加多个，具体配置说明请查看文档

modules/mime/mime.go

@@ -43,7 +43,7 @@ func check(r io.ReadSeeker, list []string) (bool, string) {
 		return true, ""
 	}
 	_, _ = r.Seek(0, io.SeekStart)
-	defer r.Seek(0, io.SeekStart) // nolint
+	defer r.Seek(0, io.SeekStart)
 	t, err := mimetype.DetectReader(r)
 	if err != nil {
 		logrus.Debugf("扫描 Mime 时出现问题: %v", err)