func (s *server) init() {
s.dirty_words = make(map[string]bool)
dict_path, dirty_words_path := s.data_path()
// 载入字典
log.Trace("Loading Dictionary...")
s.segmenter.LoadDictionary(dict_path)
log.Trace("Dictionary Loaded")
// 读取脏词库
log.Trace(SERVICE, "Loading Dirty Words...")
f, err := os.Open(dirty_words_path)
if err != nil {
log.Critical(err)
os.Exit(-1)
}
defer f.Close()
// 逐行扫描
scanner := bufio.NewScanner(f)
scanner.Split(bufio.ScanLines)
for scanner.Scan() {
word := strings.ToUpper(strings.TrimSpace(scanner.Text())) // 均处理为大写
if word != "" {
s.dirty_words[word] = true
}
}
log.Trace("Dirty Words Loaded")
}
func (s *server) init() {
// 载入IP表
log.Trace("Loading GEOIP City...")
reader, err := maxminddb.Open(s.data_path())
if err != nil {
log.Critical(err)
os.Exit(-1)
}
s.mmdb = reader
log.Trace("GEOIP City Load Complete.")
}
//---------------------------------------------------------- 读取GridFS文件
func LoadFile(filename string) (ok bool, content []byte) {
ms := _global_ms.Copy()
defer ms.Close()
buf := &bytes.Buffer{}
file, err := ms.DB("").GridFS("fs").Open(filename)
if err != nil {
log.Warning("gridfs", filename, err)
return false, nil
}
n, err := io.Copy(buf, file)
if err != nil {
log.Error("gridfs", filename, n, err)
return false, nil
}
err = file.Close()
if err != nil {
log.Error("gridfs", filename, err)
return false, nil
}
log.Trace("gridfs", filename, "load from GridFS!!")
return true, buf.Bytes()
}
func (arch *Archiver) init() {
arch.pending = make(chan []byte)
arch.stop = make(chan bool)
cfg := nsq.NewConfig()
consumer, err := nsq.NewConsumer(TOPIC, CHANNEL, cfg)
if err != nil {
log.Critical(err)
os.Exit(-1)
}
// message process
consumer.AddHandler(nsq.HandlerFunc(func(msg *nsq.Message) error {
arch.pending <- msg.Body
return nil
}))
// read environtment variable
addresses := []string{DEFAULT_NSQLOOKUPD}
if env := os.Getenv(ENV_NSQLOOKUPD); env != "" {
addresses = strings.Split(env, ";")
}
// connect to nsqlookupd
log.Trace("connect to nsqlookupds ip:", addresses)
if err := consumer.ConnectToNSQLookupds(addresses); err != nil {
log.Critical(err)
return
}
log.Info("nsqlookupd connected")
go arch.archive_task()
}
// 玩家登陆过程
func P_user_login_req(sess *Session, reader *packet.Packet) []byte {
// TODO: 登陆鉴权
sess.UserId = 1
// TODO: 选择登陆服务器
sess.GSID = DEFAULT_GSID
// 选服
cli, err := sp.GetServiceWithId(sp.SERVICE_GAME, sess.GSID)
if err != nil {
log.Critical(err)
return nil
}
// type assertion
game_cli, ok := cli.(spp.GameServiceClient)
if !ok {
log.Critical("cannot do type assertion on: %v", sess.GSID)
return nil
}
// 开启到游戏服的流
// TODO: 处理context，设定超时
stream, err := game_cli.Stream(context.Background())
if err != nil {
log.Critical(err)
return nil
}
sess.Stream = stream
// 在game注册
// TODO: 新用户的创建由game处理
sess.Stream.Send(&spp.Game_Frame{Type: spp.Game_Register, UserId: sess.UserId})
// 读取GAME返回消息
fetcher_task := func(sess *Session) {
for {
in, err := sess.Stream.Recv()
if err == io.EOF { // 流关闭
log.Trace(err)
return
}
if err != nil {
log.Error(err)
return
}
sess.MQ <- *in
}
}
go fetcher_task(sess)
return packet.Pack(Code["user_login_ack"], user_snapshot{F_uid: sess.UserId}, nil)
}
// 玩家登陆过程
func P_user_login_req(sess *Session, reader *packet.Packet) []byte {
// TODO: 登陆鉴权
sess.UserId = 1
// TODO: 选择登陆服务器
sess.GSID = DEFAULT_GSID
// 选服
conn := sp.GetServiceWithId(sp.DEFAULT_SERVICE_PATH+"/game", sess.GSID)
if conn == nil {
log.Critical("cannot get game service:", sess.GSID)
return nil
}
cli := pb.NewGameServiceClient(conn)
// 开启到游戏服的流
// TODO: 处理context，设定超时
stream, err := cli.Stream(context.Background())
if err != nil {
log.Critical(err)
return nil
}
sess.Stream = stream
// 在game注册
// TODO: 新用户的创建由game处理
sess.Stream.Send(&pb.Game_Frame{Type: pb.Game_Register, UserId: sess.UserId})
// 读取GAME返回消息
fetcher_task := func(sess *Session) {
for {
in, err := sess.Stream.Recv()
if err == io.EOF { // 流关闭
log.Trace(err)
return
}
if err != nil {
log.Error(err)
return
}
select {
case sess.MQ <- *in:
case <-sess.Die:
}
}
}
go fetcher_task(sess)
return packet.Pack(Code["user_login_succeed_ack"], S_user_snapshot{F_uid: sess.UserId}, nil)
}
//---------------------------------------------------------- 删除GridFS文件
func RemoveFile(filename string) bool {
ms := _global_ms.Copy()
defer ms.Close()
gridfs := ms.DB("").GridFS("fs")
// 删除同名文件
err := gridfs.Remove(filename)
if err != nil {
log.Warning("gridfs", filename, err)
return false
}
log.Trace("gridfs", filename, "removed from GridFS!!")
return true
}
// 玩家登陆过程
func P_user_login_req(sess *Session, reader *packet.Packet) []byte {
// TODO: 登陆鉴权
// 简单鉴权可以在agent直接完成，通常公司都存在一个用户中心服务器用于鉴权
sess.UserId = 1
// TODO: 选择GAME服务器
// 选服策略依据业务进行，比如小服可以固定选取某台，大服可以采用HASH或一致性HASH
sess.GSID = DEFAULT_GSID
// 连接到已选定GAME服务器
conn := sp.GetServiceWithId(sp.DEFAULT_SERVICE_PATH+"/game", sess.GSID)
if conn == nil {
log.Critical("cannot get game service:", sess.GSID)
return nil
}
cli := pb.NewGameServiceClient(conn)
// 开启到游戏服的流
ctx := metadata.NewContext(context.Background(), metadata.New(map[string]string{"userid": fmt.Sprint(sess.UserId)}))
stream, err := cli.Stream(ctx)
if err != nil {
log.Critical(err)
return nil
}
sess.Stream = stream
// 读取GAME返回消息的goroutine
fetcher_task := func(sess *Session) {
for {
in, err := sess.Stream.Recv()
if err == io.EOF { // 流关闭
log.Trace(err)
return
}
if err != nil {
log.Error(err)
return
}
select {
case sess.MQ <- *in:
case <-sess.Die:
}
}
}
go fetcher_task(sess)
return packet.Pack(Code["user_login_succeed_ack"], S_user_snapshot{F_uid: sess.UserId}, nil)
}
// stream server
func (s *server) Stream(stream GameService_StreamServer) error {
var sess Session
ch_agent := s.recv(stream)
ch_ipc := make(chan *Game_Frame, DEFAULT_CH_IPC_SIZE)
defer func() {
if sess.Flag&SESS_REGISTERED != 0 {
// TODO: destroy session
sess.Flag &^= SESS_REGISTERED
registry.Unregister(sess.UserId)
}
log.Trace("stream end:", sess.UserId)
}()
// >> main message loop <<
for {
select {
case frame, ok := <-ch_agent: // frames from agent
if !ok { // EOF
return nil
}
switch frame.Type {
case Game_Message:
// validation
if sess.Flag&SESS_REGISTERED == 0 {
log.Critical("user not registered")
return ERROR_USER_NOT_REGISTERED
}
// locate handler by proto number
reader := packet.Reader(frame.Message)
c, err := reader.ReadS16()
if err != nil {
log.Critical(err)
return err
}
handle := client_handler.Handlers[c]
if handle == nil {
log.Criticalf("service not bind: %v", c)
return ERROR_SERVICE_NOT_BIND
}
// serialized processing, no future locks needed.
// multiple agents can connect simutaneously to games
var ret []byte
wrap := func() { ret = handle(&sess, reader) }
s.latch(wrap)
// construct frame & return message from logic
if ret != nil {
if err := stream.Send(&Game_Frame{Type: Game_Message, Message: ret}); err != nil {
log.Critical(err)
return err
}
}
// session control by logic
if sess.Flag&SESS_KICKED_OUT != 0 { // logic kick out
if err := stream.Send(&Game_Frame{Type: Game_Kick}); err != nil {
log.Critical(err)
return err
}
return nil
}
case Game_Register:
if sess.Flag&SESS_REGISTERED == 0 {
// TODO: create session
sess.Flag |= SESS_REGISTERED
sess.UserId = frame.UserId
registry.Register(frame.UserId, ch_ipc)
log.Trace("user registered")
} else {
log.Critical("user already registered")
}
case Game_Unregister:
if sess.Flag&SESS_REGISTERED != 0 {
// TODO: destroy session
sess.Flag &^= SESS_REGISTERED
registry.Unregister(sess.UserId)
log.Trace("user unregistered")
} else {
log.Critical("user not registered")
}
case Game_Ping:
if err := stream.Send(&Game_Frame{Type: Game_Ping, Message: frame.Message}); err != nil {
log.Critical(err)
return err
}
log.Trace("pinged")
default:
log.Criticalf("incorrect frame type: %v", frame.Type)
return ERROR_INCORRECT_FRAME_TYPE
}
case frame := <-ch_ipc: // forward async messages from interprocess(goroutines) communication
if err := stream.Send(frame); err != nil {
log.Critical(err)
return err
}
}
}
}
// client protocol handle proxy
func proxy_user_request(sess *Session, p []byte) []byte {
start := time.Now()
defer utils.PrintPanicStack(sess, p)
// 解密
if sess.Flag&SESS_ENCRYPT != 0 {
sess.Decoder.XORKeyStream(p, p)
}
// 封装为reader
reader := packet.Reader(p)
// 读客户端数据包序列号(1,2,3...)
// 可避免重放攻击-REPLAY-ATTACK
seq_id, err := reader.ReadU32()
if err != nil {
log.Error("read client timestamp failed:", err)
sess.Flag |= SESS_KICKED_OUT
return nil
}
// 数据包序列号验证
if seq_id != sess.PacketCount {
log.Errorf("illegal packet sequence id:%v should be:%v size:%v", seq_id, sess.PacketCount, len(p)-6)
sess.Flag |= SESS_KICKED_OUT
return nil
}
// 读协议号
b, err := reader.ReadS16()
if err != nil {
log.Error("read protocol number failed.")
sess.Flag |= SESS_KICKED_OUT
return nil
}
// 根据协议号断做服务划分
var ret []byte
if b > MAX_PROTO_NUM {
if err := forward(sess, p[4:]); err != nil {
log.Errorf("service id:%v execute failed, error:%v", b, err)
sess.Flag |= SESS_KICKED_OUT
return nil
}
} else {
if h := client_handler.Handlers[b]; h != nil {
ret = h(sess, reader)
} else {
log.Errorf("service id:%v not bind", b)
sess.Flag |= SESS_KICKED_OUT
return nil
}
}
// 统计处理时间
elasped := time.Now().Sub(start)
if b != 0 { // 排除心跳包日志
log.Trace("[REQ]", client_handler.RCode[b])
_statter.Timing(1.0, fmt.Sprintf("%v%v", STATSD_PREFIX, client_handler.RCode[b]), elasped)
}
return ret
}
// PIPELINE #2 stream processing
// the center of game logic
func (s *server) Stream(stream GameService_StreamServer) error {
defer PrintPanicStack()
// session init
var sess Session
sess_die := make(chan struct{})
ch_agent := s.recv(stream, sess_die)
ch_ipc := make(chan *Game_Frame, DEFAULT_CH_IPC_SIZE)
defer func() {
registry.Unregister(sess.UserId)
close(sess_die)
log.Trace("stream end:", sess.UserId)
}()
// read metadata from context
md, ok := metadata.FromContext(stream.Context())
if !ok {
log.Critical("cannot read metadata from context")
return ERROR_INCORRECT_FRAME_TYPE
}
// read key
if len(md["userid"]) == 0 {
log.Critical("cannot read key:userid from metadata")
return ERROR_INCORRECT_FRAME_TYPE
}
// parse userid
userid, err := strconv.Atoi(md["userid"][0])
if err != nil {
log.Critical(err)
return ERROR_INCORRECT_FRAME_TYPE
}
// register user
sess.UserId = int32(userid)
registry.Register(sess.UserId, ch_ipc)
log.Finef("userid %v logged in", sess.UserId)
// >> main message loop <<
for {
select {
case frame, ok := <-ch_agent: // frames from agent
if !ok { // EOF
return nil
}
switch frame.Type {
case Game_Message: // the passthrough message from client->agent->game
// locate handler by proto number
reader := packet.Reader(frame.Message)
c, err := reader.ReadS16()
if err != nil {
log.Critical(err)
return err
}
handle := client_handler.Handlers[c]
if handle == nil {
log.Criticalf("service not bind: %v", c)
return ERROR_SERVICE_NOT_BIND
}
// handle request
ret := handle(&sess, reader)
// construct frame & return message from logic
if ret != nil {
if err := stream.Send(&Game_Frame{Type: Game_Message, Message: ret}); err != nil {
log.Critical(err)
return err
}
}
// session control by logic
if sess.Flag&SESS_KICKED_OUT != 0 { // logic kick out
if err := stream.Send(&Game_Frame{Type: Game_Kick}); err != nil {
log.Critical(err)
return err
}
return nil
}
case Game_Ping:
if err := stream.Send(&Game_Frame{Type: Game_Ping, Message: frame.Message}); err != nil {
log.Critical(err)
return err
}
log.Trace("pinged")
default:
log.Criticalf("incorrect frame type: %v", frame.Type)
return ERROR_INCORRECT_FRAME_TYPE
}
case frame := <-ch_ipc: // forward async messages from interprocess(goroutines) communication
if err := stream.Send(frame); err != nil {
log.Critical(err)
return err
}
}
}
}
