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processor.go
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processor.go
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package server
import (
"encoding/base64"
"errors"
"fmt"
"net/url"
"strings"
"sync"
"time"
"github.com/WuKongIM/WuKongIM/pkg/wklog"
"github.com/WuKongIM/WuKongIM/pkg/wknet"
"github.com/WuKongIM/WuKongIM/pkg/wkstore"
"github.com/WuKongIM/WuKongIM/pkg/wkutil"
wkproto "github.com/WuKongIM/WuKongIMGoProto"
"github.com/bwmarrin/snowflake"
"go.uber.org/zap"
)
type Processor struct {
s *Server
connContextPool sync.Pool
frameWorkPool *FrameWorkPool
wklog.Log
messageIDGen *snowflake.Node // 消息ID生成器
framePool *FramePool // 对象池
}
func NewProcessor(s *Server) *Processor {
// Initialize the messageID generator of the snowflake algorithm
messageIDGen, err := snowflake.NewNode(int64(s.opts.ID))
if err != nil {
panic(err)
}
return &Processor{
s: s,
messageIDGen: messageIDGen,
Log: wklog.NewWKLog("Processor"),
frameWorkPool: NewFrameWorkPool(),
framePool: NewFramePool(),
connContextPool: sync.Pool{
New: func() any {
cc := newConnContext(s)
cc.init()
return cc
},
},
}
}
// 处理同类型的frame集合
func (p *Processor) processSameFrame(conn wknet.Conn, frameType wkproto.FrameType, frames []wkproto.Frame, s, e int) {
switch frameType {
case wkproto.PING: // ping
p.processPing(conn, frames[0].(*wkproto.PingPacket))
case wkproto.SEND: // process send
tmpFrames := p.framePool.GetSendPackets()
for _, frame := range frames {
tmpFrames = append(tmpFrames, frame.(*wkproto.SendPacket))
}
p.processMsgs(conn, tmpFrames)
p.framePool.PutSendPackets(tmpFrames) // 注意:这里回收了,processMsgs里不要对tmpFrames进行异步操作,容易引起数据错乱
case wkproto.RECVACK: // process recvack
tmpFrames := p.framePool.GetRecvackPackets()
for _, frame := range frames {
tmpFrames = append(tmpFrames, frame.(*wkproto.RecvackPacket))
}
p.processRecvacks(conn, tmpFrames)
p.framePool.PutRecvackPackets(tmpFrames)
case wkproto.SUB: // 订阅
tmpFrames := p.framePool.GetSubPackets()
for _, frame := range frames {
tmpFrames = append(tmpFrames, frame.(*wkproto.SubPacket))
}
p.processSubs(conn, tmpFrames)
p.framePool.PutSubPackets(tmpFrames)
}
// 完成frame处理
connCtx := conn.Context()
if connCtx != nil {
connCtx.(*connContext).finishFrames(len(frames))
}
}
// #################### conn auth ####################
func (p *Processor) processAuth(conn wknet.Conn, connectPacket *wkproto.ConnectPacket) {
var (
uid = connectPacket.UID
devceLevel wkproto.DeviceLevel = wkproto.DeviceLevelMaster
err error
devceLevelI uint8
token string
)
if strings.TrimSpace(connectPacket.ClientKey) == "" {
p.responseConnackAuthFail(conn)
return
}
// -------------------- token verify --------------------
if connectPacket.UID == p.s.opts.ManagerUID {
if p.s.opts.ManagerTokenOn && connectPacket.Token != p.s.opts.ManagerToken {
p.Error("manager token verify fail", zap.String("uid", uid), zap.String("token", connectPacket.Token))
p.responseConnackAuthFail(conn)
return
}
devceLevel = wkproto.DeviceLevelSlave // 默认都是slave设备
} else if p.s.opts.TokenAuthOn {
if connectPacket.Token == "" {
p.Error("token is empty")
p.responseConnackAuthFail(conn)
return
}
token, devceLevelI, err = p.s.store.GetUserToken(uid, connectPacket.DeviceFlag.ToUint8())
if err != nil {
p.Error("get user token err", zap.Error(err))
p.responseConnackAuthFail(conn)
return
}
if token != connectPacket.Token {
p.Error("token verify fail", zap.String("expectToken", token), zap.String("actToken", connectPacket.Token), zap.Any("conn", conn))
p.responseConnackAuthFail(conn)
return
}
devceLevel = wkproto.DeviceLevel(devceLevelI)
} else {
devceLevel = wkproto.DeviceLevelSlave // 默认都是slave设备
}
// -------------------- ban --------------------
userChannelInfo, err := p.s.store.GetChannel(uid, wkproto.ChannelTypePerson)
if err != nil {
p.Error("get user channel info err", zap.Error(err))
p.responseConnackAuthFail(conn)
return
}
ban := false
if userChannelInfo != nil {
ban = userChannelInfo.Ban
}
if ban {
p.Error("user is ban", zap.String("uid", uid))
p.responseConnack(conn, 0, wkproto.ReasonBan)
return
}
// -------------------- get message encrypt key --------------------
dhServerPrivKey, dhServerPublicKey := wkutil.GetCurve25519KeypPair() // 生成服务器的DH密钥对
aesKey, aesIV, err := p.getClientAesKeyAndIV(connectPacket.ClientKey, dhServerPrivKey)
if err != nil {
p.Error("get client aes key and iv err", zap.Error(err))
p.responseConnackAuthFail(conn)
return
}
dhServerPublicKeyEnc := base64.StdEncoding.EncodeToString(dhServerPublicKey[:])
// -------------------- same master kicks each other --------------------
oldConns := p.s.connManager.GetConnsWith(uid, connectPacket.DeviceFlag)
if len(oldConns) > 0 {
if devceLevel == wkproto.DeviceLevelMaster { // 如果设备是master级别,则把旧连接都踢掉
for _, oldConn := range oldConns {
p.s.connManager.RemoveConnWithID(oldConn.ID())
if oldConn.DeviceID() != connectPacket.DeviceID {
p.Info("same master kicks each other", zap.String("devceLevel", devceLevel.String()), zap.String("uid", uid), zap.String("deviceID", connectPacket.DeviceID), zap.String("oldDeviceID", oldConn.DeviceID()))
p.response(oldConn, &wkproto.DisconnectPacket{
ReasonCode: wkproto.ReasonConnectKick,
Reason: "login in other device",
})
p.s.timingWheel.AfterFunc(time.Second*5, func() {
oldConn.Close()
})
} else {
p.s.timingWheel.AfterFunc(time.Second*4, func() {
oldConn.Close() // Close old connection
})
}
p.Debug("close old conn", zap.Any("oldConn", oldConn))
}
} else if devceLevel == wkproto.DeviceLevelSlave { // 如果设备是slave级别,则把相同的deviceID踢掉
for _, oldConn := range oldConns {
if oldConn.DeviceID() == connectPacket.DeviceID {
p.s.connManager.RemoveConnWithID(oldConn.ID())
p.s.timingWheel.AfterFunc(time.Second*5, func() {
oldConn.Close()
})
}
}
}
}
// -------------------- set conn info --------------------
timeDiff := time.Now().UnixNano()/1000/1000 - connectPacket.ClientTimestamp
// connCtx := p.connContextPool.Get().(*connContext)
connCtx := newConnContext(p.s)
connCtx.init()
connCtx.conn = conn
conn.SetContext(connCtx)
conn.SetProtoVersion(int(connectPacket.Version))
conn.SetAuthed(true)
conn.SetDeviceFlag(connectPacket.DeviceFlag.ToUint8())
conn.SetDeviceID(connectPacket.DeviceID)
conn.SetUID(connectPacket.UID)
conn.SetValue(constAesKeyKey, aesKey)
conn.SetValue(constAesIVKey, aesIV)
conn.SetDeviceLevel(devceLevelI)
conn.SetMaxIdle(p.s.opts.ConnIdleTime)
p.s.connManager.AddConn(conn)
// -------------------- response connack --------------------
lastVersion := connectPacket.Version
hasServerVersion := false
if connectPacket.Version > wkproto.LatestVersion {
lastVersion = wkproto.LatestVersion
}
if connectPacket.Version > 3 {
hasServerVersion = true
}
p.s.Debug("Auth Success", zap.Any("conn", conn), zap.Uint8("protoVersion", connectPacket.Version), zap.Bool("hasServerVersion", hasServerVersion))
connack := &wkproto.ConnackPacket{
Salt: aesIV,
ServerKey: dhServerPublicKeyEnc,
ReasonCode: wkproto.ReasonSuccess,
TimeDiff: timeDiff,
ServerVersion: lastVersion,
}
connack.HasServerVersion = hasServerVersion
p.response(conn, connack)
// -------------------- user online --------------------
// 在线webhook
onlineCount, totalOnlineCount := p.s.connManager.GetConnCountWith(uid, connectPacket.DeviceFlag)
p.s.webhook.Online(uid, connectPacket.DeviceFlag, conn.ID(), onlineCount, totalOnlineCount)
}
// #################### ping ####################
func (p *Processor) processPing(conn wknet.Conn, pingPacket *wkproto.PingPacket) {
p.Debug("ping", zap.Any("conn", conn))
p.response(conn, &wkproto.PongPacket{})
}
// #################### messages ####################
func (p *Processor) processMsgs(conn wknet.Conn, sendPackets []*wkproto.SendPacket) {
var (
sendackPackets = make([]wkproto.Frame, 0, len(sendPackets)) // response sendack packets
channelSendPacketMap = make(map[string][]*wkproto.SendPacket, 0) // split sendPacket by channel
// recvPackets = make([]wkproto.RecvPacket, 0, len(sendpPackets)) // recv packets
)
// ########## split sendPacket by channel ##########
for _, sendPacket := range sendPackets {
channelKey := fmt.Sprintf("%s-%d", sendPacket.ChannelID, sendPacket.ChannelType)
channelSendpackets := channelSendPacketMap[channelKey]
if channelSendpackets == nil {
channelSendpackets = make([]*wkproto.SendPacket, 0, len(sendackPackets))
}
channelSendpackets = append(channelSendpackets, sendPacket)
channelSendPacketMap[channelKey] = channelSendpackets
}
// ########## process message for channel ##########
for _, sendPackets := range channelSendPacketMap {
firstSendPacket := sendPackets[0]
channelSendackPackets, err := p.prcocessChannelMessages(conn, firstSendPacket.ChannelID, firstSendPacket.ChannelType, sendPackets)
if err != nil {
p.Error("process channel messages err", zap.Error(err))
}
if len(channelSendackPackets) > 0 {
sendackPackets = append(sendackPackets, channelSendackPackets...)
}
}
p.response(conn, sendackPackets...)
}
func (p *Processor) prcocessChannelMessages(conn wknet.Conn, channelID string, channelType uint8, sendPackets []*wkproto.SendPacket) ([]wkproto.Frame, error) {
var (
sendackPackets = make([]wkproto.Frame, 0, len(sendPackets)) // response sendack packets
messages = make([]*Message, 0, len(sendPackets)) // recv packets
err error
respSendackPacketsFnc = func(sendPackets []*wkproto.SendPacket, reasonCode wkproto.ReasonCode) []wkproto.Frame {
for _, sendPacket := range sendPackets {
sendackPackets = append(sendackPackets, p.getSendackPacketWithSendPacket(sendPacket, reasonCode))
}
return sendackPackets
}
respSendackPacketsWithRecvFnc = func(messages []*Message, reasonCode wkproto.ReasonCode) []wkproto.Frame {
for _, m := range messages {
sendackPackets = append(sendackPackets, p.getSendackPacket(m, reasonCode))
}
return sendackPackets
}
)
//########## get channel and assert permission ##########
fakeChannelID := channelID
if channelType == wkproto.ChannelTypePerson {
fakeChannelID = GetFakeChannelIDWith(conn.UID(), channelID)
}
channel, err := p.s.channelManager.GetChannel(fakeChannelID, channelType)
if err != nil {
p.Error("getChannel is error", zap.Error(err), zap.String("fakeChannelID", fakeChannelID), zap.Uint8("channelType", channelType))
return respSendackPacketsFnc(sendPackets, wkproto.ReasonSystemError), nil
}
if channel == nil {
p.Error("the channel does not exist or has been disbanded", zap.String("channel_id", fakeChannelID), zap.Uint8("channel_type", channelType))
return respSendackPacketsFnc(sendPackets, wkproto.ReasonChannelNotExist), nil
}
if channelType == wkproto.ChannelTypePerson { // 如果是个人频道,需要验证接受者是否愿意接受消息
to := channelID
if !p.s.systemUIDManager.SystemUID(to) && !p.s.systemUIDManager.SystemUID(conn.UID()) { // 如果是系统频道,不需要验证
toChannel, err := p.s.channelManager.GetChannel(to, channelType)
if err != nil {
p.Error("getChannel is error", zap.Error(err), zap.String("to", to))
return respSendackPacketsFnc(sendPackets, wkproto.ReasonSystemError), nil
}
if toChannel == nil {
p.Error("the channel not exist", zap.String("to", to))
return respSendackPacketsFnc(sendPackets, wkproto.ReasonChannelNotExist), nil
}
allow, reason := toChannel.Allow(conn.UID()) // 验证是否允许接受消息
if !allow {
p.Error("not allow send message", zap.String("fromUID", conn.UID()), zap.String("to", to), zap.String("reason", reason.String()))
return respSendackPacketsFnc(sendPackets, reason), nil
}
}
} else {
hasPerm, reasonCode := p.hasPermission(channel, conn.UID())
if !hasPerm {
return respSendackPacketsFnc(sendPackets, reasonCode), nil
}
}
// ########## message decrypt and message store ##########
for _, sendPacket := range sendPackets {
var messageID = p.genMessageID() // generate messageID
if sendPacket.SyncOnce { // client not support send syncOnce message
sendackPackets = append(sendackPackets, &wkproto.SendackPacket{
Framer: sendPacket.Framer,
ClientSeq: sendPacket.ClientSeq,
ClientMsgNo: sendPacket.ClientMsgNo,
MessageID: messageID,
ReasonCode: wkproto.ReasonNotSupportHeader,
})
continue
}
decodePayload, err := p.checkAndDecodePayload(messageID, sendPacket, conn)
if err != nil {
p.Error("decode payload err", zap.Error(err))
p.response(conn, &wkproto.SendackPacket{
Framer: sendPacket.Framer,
ClientSeq: sendPacket.ClientSeq,
ClientMsgNo: sendPacket.ClientMsgNo,
MessageID: messageID,
ReasonCode: wkproto.ReasonPayloadDecodeError,
})
continue
}
messages = append(messages, &Message{
RecvPacket: &wkproto.RecvPacket{
Framer: wkproto.Framer{
RedDot: sendPacket.GetRedDot(),
SyncOnce: sendPacket.GetsyncOnce(),
NoPersist: sendPacket.GetNoPersist(),
},
Setting: sendPacket.Setting,
MessageID: messageID,
ClientMsgNo: sendPacket.ClientMsgNo,
StreamNo: sendPacket.StreamNo,
StreamFlag: wkproto.StreamFlagIng,
FromUID: conn.UID(),
Expire: sendPacket.Expire,
ChannelID: sendPacket.ChannelID,
ChannelType: sendPacket.ChannelType,
Topic: sendPacket.Topic,
Timestamp: int32(time.Now().Unix()),
Payload: decodePayload,
// ---------- 以下不参与编码 ------------
ClientSeq: sendPacket.ClientSeq,
},
fromDeviceFlag: wkproto.DeviceFlag(conn.DeviceFlag()),
fromDeviceID: conn.DeviceID(),
large: channel.Large,
})
}
if len(messages) == 0 {
return sendackPackets, nil
}
err = p.storeChannelMessagesIfNeed(conn.UID(), messages) // only have messageSeq after message save
if err != nil {
p.Error("store channel messages err", zap.Error(err))
return respSendackPacketsWithRecvFnc(messages, wkproto.ReasonSystemError), err
}
//########## message store to queue ##########
if p.s.opts.WebhookOn() {
err = p.storeChannelMessagesToNotifyQueue(messages)
if err != nil {
p.Error("store channel messages to notify queue err", zap.Error(err))
return respSendackPacketsWithRecvFnc(messages, wkproto.ReasonSystemError), err
}
}
//########## message put to channel ##########
err = channel.Put(messages, nil, conn.UID(), wkproto.DeviceFlag(conn.DeviceFlag()), conn.DeviceID())
if err != nil {
p.Error("put message to channel err", zap.Error(err))
return respSendackPacketsWithRecvFnc(messages, wkproto.ReasonSystemError), err
}
//########## respose ##########
if len(messages) > 0 {
for _, message := range messages {
sendackPackets = append(sendackPackets, p.getSendackPacket(message, wkproto.ReasonSuccess))
}
}
return sendackPackets, nil
}
// if has permission for sender
func (p *Processor) hasPermission(channel *Channel, fromUID string) (bool, wkproto.ReasonCode) {
if channel.ChannelType == wkproto.ChannelTypeCustomerService { // customer service channel
return true, wkproto.ReasonSuccess
}
allow, reason := channel.Allow(fromUID)
if !allow {
p.Error("The user is not in the white list or in the black list", zap.String("fromUID", fromUID), zap.String("reason", reason.String()))
return false, reason
}
if channel.ChannelType != wkproto.ChannelTypePerson && channel.ChannelType != wkproto.ChannelTypeInfo {
if !channel.IsSubscriber(fromUID) && !channel.IsTmpSubscriber(fromUID) {
p.Error("The user is not in the channel and cannot send messages to the channel", zap.String("fromUID", fromUID), zap.String("channel_id", channel.ChannelID), zap.Uint8("channel_type", channel.ChannelType))
return false, wkproto.ReasonSubscriberNotExist
}
}
return true, wkproto.ReasonSuccess
}
func (p *Processor) getSendackPacket(msg *Message, reasonCode wkproto.ReasonCode) *wkproto.SendackPacket {
return &wkproto.SendackPacket{
Framer: msg.Framer,
ClientMsgNo: msg.ClientMsgNo,
ClientSeq: msg.ClientSeq,
MessageID: msg.MessageID,
MessageSeq: msg.MessageSeq,
ReasonCode: reasonCode,
}
}
func (p *Processor) getSendackPacketWithSendPacket(sendPacket *wkproto.SendPacket, reasonCode wkproto.ReasonCode) *wkproto.SendackPacket {
return &wkproto.SendackPacket{
Framer: sendPacket.Framer,
ClientMsgNo: sendPacket.ClientMsgNo,
ClientSeq: sendPacket.ClientSeq,
ReasonCode: reasonCode,
}
}
// store channel messages
func (p *Processor) storeChannelMessagesIfNeed(fromUID string, messages []*Message) error {
if len(messages) == 0 {
return nil
}
storeMessages := make([]wkstore.Message, 0, len(messages))
for _, m := range messages {
if m.NoPersist || m.SyncOnce {
continue
}
if m.StreamIng() { // 流消息单独存储
_, err := p.s.store.AppendStreamItem(GetFakeChannelIDWith(fromUID, m.ChannelID), m.ChannelType, m.StreamNo, &wkstore.StreamItem{
ClientMsgNo: m.ClientMsgNo,
Blob: m.Payload,
})
if err != nil {
p.Error("store stream item err", zap.Error(err))
return err
}
continue
}
storeMessages = append(storeMessages, m)
}
if len(storeMessages) == 0 {
return nil
}
firstMessage := storeMessages[0].(*Message)
fakeChannelID := firstMessage.ChannelID
if firstMessage.ChannelType == wkproto.ChannelTypePerson {
fakeChannelID = GetFakeChannelIDWith(fromUID, firstMessage.ChannelID)
}
_, err := p.s.store.AppendMessages(fakeChannelID, firstMessage.ChannelType, storeMessages)
if err != nil {
p.Error("store message err", zap.Error(err))
return err
}
return nil
}
func (p *Processor) storeChannelMessagesToNotifyQueue(messages []*Message) error {
if len(messages) == 0 {
return nil
}
storeMessages := make([]wkstore.Message, 0, len(messages))
for _, m := range messages {
if m.StreamIng() || (m.NoPersist && m.SyncOnce) { // 流消息不做通知(只通知开始和结束),不存储的消息也不通知
continue
}
storeMessages = append(storeMessages, m)
}
return p.s.store.AppendMessageOfNotifyQueue(storeMessages)
}
// decode payload
func (p *Processor) checkAndDecodePayload(messageID int64, sendPacket *wkproto.SendPacket, c wknet.Conn) ([]byte, error) {
aesKey, aesIV := getAesKeyFromConn(c)
vail, err := p.sendPacketIsVail(sendPacket, c)
if err != nil {
return nil, err
}
if !vail {
return nil, errors.New("sendPacket is illegal!")
}
// decode payload
decodePayload, err := wkutil.AesDecryptPkcs7Base64(sendPacket.Payload, []byte(aesKey), []byte(aesIV))
if err != nil {
p.Error("Failed to decode payload!", zap.Error(err))
return nil, err
}
return decodePayload, nil
}
// send packet is vail
func (p *Processor) sendPacketIsVail(sendPacket *wkproto.SendPacket, c wknet.Conn) (bool, error) {
aesKey, aesIV := getAesKeyFromConn(c)
signStr := sendPacket.VerityString()
actMsgKey, err := wkutil.AesEncryptPkcs7Base64([]byte(signStr), []byte(aesKey), []byte(aesIV))
if err != nil {
p.Error("msgKey is illegal!", zap.Error(err), zap.String("sign", signStr), zap.String("aesKey", aesKey), zap.String("aesIV", aesIV), zap.Any("conn", c))
return false, err
}
actMsgKeyStr := sendPacket.MsgKey
exceptMsgKey := wkutil.MD5(string(actMsgKey))
if actMsgKeyStr != exceptMsgKey {
p.Error("msgKey is illegal!", zap.String("except", exceptMsgKey), zap.String("act", actMsgKeyStr), zap.String("sign", signStr), zap.String("aesKey", aesKey), zap.String("aesIV", aesIV), zap.Any("conn", c))
return false, errors.New("msgKey is illegal!")
}
return true, nil
}
// #################### subscribe ####################
func (p *Processor) processSubs(conn wknet.Conn, subPackets []*wkproto.SubPacket) {
for _, subPacket := range subPackets {
p.processSub(conn, subPacket)
}
}
func (p *Processor) processSub(conn wknet.Conn, subPacket *wkproto.SubPacket) {
channelIDUrl, err := url.Parse(subPacket.ChannelID)
if err != nil {
p.Warn("订阅的频道ID不合法!", zap.Error(err), zap.String("channelID", subPacket.ChannelID))
return
}
channelID := channelIDUrl.Path
if strings.TrimSpace(channelID) == "" {
p.Warn("订阅的频道ID不能为空!", zap.String("channelID", subPacket.ChannelID))
return
}
paramMap := map[string]interface{}{}
values := channelIDUrl.Query()
for key, value := range values {
if len(value) > 0 {
paramMap[key] = value[0]
}
}
if subPacket.ChannelType != wkproto.ChannelTypeData {
p.Warn("订阅的频道类型不正确!", zap.Uint8("channelType", subPacket.ChannelType))
p.response(conn, p.getSuback(subPacket, channelID, wkproto.ReasonNotSupportChannelType))
return
}
channel, err := p.s.channelManager.GetChannel(channelID, subPacket.ChannelType)
if err != nil {
p.Warn("获取频道失败!", zap.Error(err))
p.response(conn, p.getSuback(subPacket, channelID, wkproto.ReasonSystemError))
return
}
if channel == nil {
p.Warn("频道不存在!", zap.String("channelID", channelID), zap.Uint8("channelType", subPacket.ChannelType))
p.response(conn, p.getSuback(subPacket, channelID, wkproto.ReasonChannelNotExist))
return
}
connCtx := conn.Context().(*connContext)
if subPacket.Action == wkproto.Subscribe {
if strings.TrimSpace(subPacket.Param) != "" {
paramM, _ := wkutil.JSONToMap(subPacket.Param)
if len(paramM) > 0 {
for k, v := range paramM {
paramMap[k] = v
}
}
}
channel.AddSubscriber(conn.UID())
connCtx.subscribeChannel(channelID, subPacket.ChannelType, paramMap)
} else {
if !p.s.connManager.ExistConnsWithUID(conn.UID()) {
channel.RemoveSubscriber(conn.UID())
}
if subPacket.ChannelType == wkproto.ChannelTypeData && len(channel.GetAllSubscribers()) == 0 {
p.s.channelManager.RemoveDataChannel(channelID, subPacket.ChannelType)
}
connCtx.unscribeChannel(channelID, subPacket.ChannelType)
}
p.response(conn, p.getSuback(subPacket, channelID, wkproto.ReasonSuccess))
}
func (p *Processor) getSuback(subPacket *wkproto.SubPacket, channelID string, reasonCode wkproto.ReasonCode) *wkproto.SubackPacket {
return &wkproto.SubackPacket{
SubNo: subPacket.SubNo,
ChannelID: channelID,
ChannelType: subPacket.ChannelType,
Action: subPacket.Action,
ReasonCode: reasonCode,
}
}
// #################### recv ack ####################
func (p *Processor) processRecvacks(conn wknet.Conn, acks []*wkproto.RecvackPacket) {
if len(acks) == 0 {
return
}
for _, ack := range acks {
persist := !ack.NoPersist
if persist {
// 完成消息(移除重试队列里的消息)
// p.Debug("移除重试队列里的消息!", zap.Uint32("messageSeq", ack.MessageSeq), zap.String("uid", conn.UID()), zap.Int64("clientID", conn.ID()), zap.Uint8("deviceFlag", conn.DeviceFlag()), zap.Uint8("deviceLevel", conn.DeviceLevel()), zap.String("deviceID", conn.DeviceID()), zap.Bool("syncOnce", ack.SyncOnce), zap.Bool("noPersist", ack.NoPersist), zap.Int64("messageID", ack.MessageID))
err := p.s.retryQueue.finishMessage(conn.UID(), conn.DeviceID(), ack.MessageID)
if err != nil {
p.Warn("移除重试队列里的消息失败!", zap.Error(err), zap.Uint32("messageSeq", ack.MessageSeq), zap.String("uid", conn.UID()), zap.Int64("clientID", conn.ID()), zap.Uint8("deviceFlag", conn.DeviceFlag()), zap.String("deviceID", conn.DeviceID()), zap.Int64("messageID", ack.MessageID))
}
}
if ack.SyncOnce && persist && wkproto.DeviceLevel(conn.DeviceLevel()) == wkproto.DeviceLevelMaster { // 写扩散和存储并且是master等级的设备才会更新游标
p.Debug("更新游标", zap.String("uid", conn.UID()), zap.Uint32("messageSeq", ack.MessageSeq))
err := p.s.store.UpdateMessageOfUserCursorIfNeed(conn.UID(), ack.MessageSeq)
if err != nil {
p.Warn("更新游标失败!", zap.Error(err), zap.String("uid", conn.UID()), zap.Uint32("messageSeq", ack.MessageSeq))
}
}
}
}
// #################### process conn close ####################
func (p *Processor) processClose(conn wknet.Conn) {
p.Debug("conn is close", zap.Any("conn", conn))
if conn.Context() != nil {
p.s.connManager.RemoveConn(conn)
connCtx := conn.Context().(*connContext)
connCtx.release()
p.connContextPool.Put(connCtx)
onlineCount, totalOnlineCount := p.s.connManager.GetConnCountWith(conn.UID(), wkproto.DeviceFlag(conn.DeviceFlag())) // 指定的uid和设备下没有新的客户端才算真真的下线(TODO: 有时候离线要比在线晚触发导致不正确)
p.s.webhook.Offline(conn.UID(), wkproto.DeviceFlag(conn.DeviceFlag()), conn.ID(), onlineCount, totalOnlineCount) // 触发离线webhook
}
}
// #################### others ####################
func (p *Processor) response(conn wknet.Conn, frames ...wkproto.Frame) {
p.s.dispatch.dataOut(conn, frames...)
}
func (p *Processor) responseConnackAuthFail(c wknet.Conn) {
p.responseConnack(c, 0, wkproto.ReasonAuthFail)
}
func (p *Processor) responseConnack(c wknet.Conn, timeDiff int64, code wkproto.ReasonCode) {
p.response(c, &wkproto.ConnackPacket{
ReasonCode: code,
TimeDiff: timeDiff,
})
}
// 获取客户端的aesKey和aesIV
// dhServerPrivKey 服务端私钥
func (p *Processor) getClientAesKeyAndIV(clientKey string, dhServerPrivKey [32]byte) (string, string, error) {
clientKeyBytes, err := base64.StdEncoding.DecodeString(clientKey)
if err != nil {
return "", "", err
}
var dhClientPubKeyArray [32]byte
copy(dhClientPubKeyArray[:], clientKeyBytes[:32])
// 获得DH的共享key
shareKey := wkutil.GetCurve25519Key(dhServerPrivKey, dhClientPubKeyArray) // 共享key
aesIV := wkutil.GetRandomString(16)
aesKey := wkutil.MD5(base64.StdEncoding.EncodeToString(shareKey[:]))[:16]
return aesKey, aesIV, nil
}
// 生成消息ID
func (p *Processor) genMessageID() int64 {
return p.messageIDGen.Generate().Int64()
}
func (p *Processor) process(conn wknet.Conn) {
connCtx := conn.Context().(*connContext)
frames := connCtx.popFrames()
p.processFrames(conn, frames)
}
// 处理相同的frame
func (p *Processor) processFrames(conn wknet.Conn, frames []wkproto.Frame) {
p.sameFrames(frames, func(s, e int, frs []wkproto.Frame) {
p.frameWorkPool.Submit(func() { // 开启协程处理相同的frame
p.processSameFrame(conn, frs[0].GetFrameType(), frs, s, e)
})
})
}
// 将frames按照frameType分组,然后处理
func (p *Processor) sameFrames(frames []wkproto.Frame, callback func(s, e int, fs []wkproto.Frame)) {
for i := 0; i < len(frames); {
frame := frames[i]
start := i
end := i + 1
for end < len(frames) {
nextFrame := frames[end]
if nextFrame.GetFrameType() == frame.GetFrameType() {
end++
} else {
break
}
}
callback(start, end, frames[start:end])
i = end
}
}