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// Package notify is a package which provide common tcp/udp/unix socket service
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package notify
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import (
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"context"
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"errors"
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"fmt"
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"math/rand"
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"net"
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"strings"
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"sync"
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"time"
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"b612.me/starcrypto"
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"b612.me/starnet"
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)
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var aesKey = []byte{0x19, 0x96, 0x11, 0x27, 228, 187, 187, 231, 142, 137, 230, 179, 189, 229, 184, 133}
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func encodeFunc(data []byte) []byte {
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return starcrypto.AesEncryptCFB(data, aesKey)
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}
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func decodeFunc(data []byte) []byte {
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return starcrypto.AesDecryptCFB(data, aesKey)
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}
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// StarNotifyS 为Server端
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type StarNotifyS struct {
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// Queue 是用来处理收发信息的简单消息队列
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Queue *starnet.StarQueue
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// FuncLists 记录了被通知项所记录的函数
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aesKey []byte
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FuncLists map[string]func(SMsg) string
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funcMu sync.Mutex
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defaultFunc func(SMsg) string
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Connected func(SMsg)
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nickName map[string]string
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stopSign context.Context
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cancel context.CancelFunc
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connPool sync.Map
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connMu sync.Mutex
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lockPool map[string]SMsg
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lockMu sync.Mutex
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udpPool map[string]*net.UDPAddr
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listener net.Listener
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isUDP bool
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Sync bool
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// UDPConn UDP监听
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UDPConn *net.UDPConn
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// Online 当前链接是否处于活跃状态
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Online bool
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// ReadDeadline tcp/unix中读超时设置,udp请直接调用UDPConn
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ReadDeadline time.Time
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// WriteDeadline tcp/unix中写超时设置,udp请直接调用UDPConn
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WriteDeadline time.Time
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// Deadline tcp/unix中超时设置,udp请直接调用UDPConn
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Deadline time.Time
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}
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// SMsg 指明当前服务端被通知的关键字
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type SMsg struct {
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Conn net.Conn
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Key string
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Value string
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UDP *net.UDPAddr
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Uconn *net.UDPConn
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mode string
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wait chan int
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nickName func(string, string) error
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getName func(string) string
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queue *starnet.StarQueue
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}
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func (star *StarNotifyS) SetAesKey(key []byte) {
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star.aesKey = key
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star.Queue.EncodeFunc = func(data []byte) []byte {
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return starcrypto.AesEncryptCFB(data, key)
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}
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star.Queue.DecodeFunc = func(data []byte) []byte {
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return starcrypto.AesDecryptCFB(data, key)
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}
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}
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func (star *StarNotifyS) GetAesKey() []byte {
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if len(star.aesKey) == 0 {
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return aesKey
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}
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return star.aesKey
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}
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func (star *StarNotifyS) getName(conn string) string {
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for k, v := range star.nickName {
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if v == conn {
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return k
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}
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}
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return ""
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}
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func (star *StarNotifyS) Stoped() <-chan struct{} {
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return star.stopSign.Done()
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}
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// GetConnPool 获取所有Client端信息
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func (star *StarNotifyS) GetConnPool() []SMsg {
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var result []SMsg
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star.connPool.Range(func(k, val interface{}) bool {
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v := val.(net.Conn)
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result = append(result, SMsg{Conn: v, mode: "pa", nickName: star.setNickName, getName: star.getName, queue: star.Queue})
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return true
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})
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for _, v := range star.udpPool {
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result = append(result, SMsg{UDP: v, Uconn: star.UDPConn, mode: "pa0", nickName: star.setNickName, getName: star.getName, queue: star.Queue})
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}
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return result
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}
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// GetClient 获取所有Client端信息
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func (star *StarNotifyS) GetClient(name string) (SMsg, error) {
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if str, ok := star.nickName[name]; ok {
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if tmp, ok := star.connPool.Load(str); ok {
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conn := tmp.(net.Conn)
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return SMsg{Conn: conn, mode: "pa", nickName: star.setNickName, getName: star.getName, queue: star.Queue}, nil
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}
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if conn, ok := star.udpPool[str]; ok {
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return SMsg{UDP: conn, Uconn: star.UDPConn, mode: "pa0", nickName: star.setNickName, getName: star.getName, queue: star.Queue}, nil
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}
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}
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return SMsg{}, errors.New("Not Found")
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}
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func (nmsg *SMsg) GetName() string {
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if nmsg.Uconn != nil {
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return nmsg.getName(nmsg.UDP.String())
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}
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return nmsg.getName(fmt.Sprint(nmsg.Conn))
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}
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func (nmsg *SMsg) SetName(name string) error {
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if nmsg.Uconn != nil {
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return nmsg.nickName(name, nmsg.UDP.String())
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}
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return nmsg.nickName(name, fmt.Sprint(nmsg.Conn))
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}
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func (nmsg *SMsg) addSlash(name string) string {
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var key []byte
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for _, v := range []byte(name) {
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if v == byte(124) || v == byte(92) {
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key = append(key, byte(92))
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}
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key = append(key, v)
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}
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return string(key)
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}
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func (nmsg *SMsg) ReplyRaw(msg interface{}) error {
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encodeData, err := encode(msg)
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if err != nil {
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return err
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}
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return nmsg.Reply(string(encodeData))
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}
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// Reply 用于向client端回复数据
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func (nmsg *SMsg) Reply(msg string) error {
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var err error
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if nmsg.Uconn == nil {
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_, err = nmsg.Conn.Write(nmsg.queue.BuildMessage([]byte(nmsg.mode + "||" + nmsg.addSlash(nmsg.Key) + "||" + msg)))
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} else {
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err = WriteToUDP(nmsg.Uconn, nmsg.UDP, nmsg.queue.BuildMessage([]byte(nmsg.mode+"||"+nmsg.addSlash(nmsg.Key)+"||"+msg)))
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}
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return err
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}
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// Send 用于向client端发送key-value数据
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func (nmsg *SMsg) Send(key, value string) error {
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var err error
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if nmsg.Uconn == nil {
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_, err = nmsg.Conn.Write(nmsg.queue.BuildMessage([]byte("pa||" + nmsg.addSlash(key) + "||" + value)))
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} else {
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err = WriteToUDP(nmsg.Uconn, nmsg.UDP, nmsg.queue.BuildMessage([]byte("pa||"+nmsg.addSlash(key)+"||"+value)))
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}
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return err
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}
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func (nmsg *SMsg) SendRaw(key string, msg interface{}) error {
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encodeData, err := encode(msg)
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if err != nil {
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return err
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}
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return nmsg.Send(key, string(encodeData))
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}
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func (star *StarNotifyS) SendWaitRaw(source SMsg, key string, msg interface{}, tmout time.Duration) (SMsg, error) {
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encodeData, err := encode(msg)
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if err != nil {
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return SMsg{}, err
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}
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return star.SendWait(source, key, string(encodeData), tmout)
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}
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// SendWait 用于向client端发送key-value数据，并等待
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func (star *StarNotifyS) SendWait(source SMsg, key, value string, tmout time.Duration) (SMsg, error) {
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var err error
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var tmceed <-chan time.Time
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rand.Seed(time.Now().UnixNano())
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mode := "sr" + fmt.Sprintf("%d%06d", time.Now().UnixNano(), rand.Intn(999999))
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if source.Uconn == nil {
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_, err = source.Conn.Write(star.Queue.BuildMessage([]byte(mode + "||" + source.addSlash(key) + "||" + value)))
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} else {
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err = WriteToUDP(source.Uconn, source.UDP, star.Queue.BuildMessage([]byte(mode+"||"+source.addSlash(key)+"||"+value)))
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}
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if err != nil {
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return SMsg{}, err
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}
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if int64(tmout) > 0 {
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tmceed = time.After(tmout)
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}
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source.wait = make(chan int, 2)
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star.lockMu.Lock()
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star.lockPool[mode] = source
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star.lockMu.Unlock()
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select {
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case <-source.wait:
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star.lockMu.Lock()
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res := star.lockPool[mode]
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delete(star.lockPool, mode)
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star.lockMu.Unlock()
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return res, nil
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case <-tmceed:
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return SMsg{}, errors.New("Time Exceed")
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}
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}
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func (star *StarNotifyS) starinits() {
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builder := starnet.NewQueue()
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builder.EncodeFunc = encodeFunc
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builder.DecodeFunc = decodeFunc
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builder.Encode = true
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star.stopSign, star.cancel = context.WithCancel(context.Background())
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star.Queue = builder
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star.udpPool = make(map[string]*net.UDPAddr)
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star.FuncLists = make(map[string]func(SMsg) string)
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star.nickName = make(map[string]string)
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star.lockPool = make(map[string]SMsg)
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star.Online = false
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star.Queue.RestoreDuration(time.Millisecond * 50)
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}
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// NewNotifyS 开启一个新的Server端通知
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func NewNotifyS(netype, value string) (*StarNotifyS, error) {
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if netype[0:3] != "udp" {
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return notudps(netype, value)
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}
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return doudps(netype, value)
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}
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func doudps(netype, value string) (*StarNotifyS, error) {
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var star StarNotifyS
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star.starinits()
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star.isUDP = true
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udpaddr, err := net.ResolveUDPAddr(netype, value)
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if err != nil {
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return nil, err
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}
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star.UDPConn, err = net.ListenUDP(netype, udpaddr)
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if err != nil {
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return nil, err
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}
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go star.notify()
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go func() {
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<-star.stopSign.Done()
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for k, v := range star.udpPool {
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WriteToUDP(star.UDPConn, v, star.Queue.BuildMessage([]byte("b612ryzstop")))
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star.connMu.Lock()
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delete(star.udpPool, k)
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star.connMu.Unlock()
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for k2, v2 := range star.nickName {
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if v2 == k {
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delete(star.nickName, k2)
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}
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}
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}
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star.UDPConn.Close()
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star.Online = false
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return
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}()
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go func() {
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for {
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buf := make([]byte, 81920)
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n, addr, err := star.UDPConn.ReadFromUDP(buf)
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if n != 0 {
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star.Queue.ParseMessage(buf[0:n], addr)
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if _, ok := star.udpPool[addr.String()]; !ok {
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if star.Connected != nil {
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go star.Connected(SMsg{UDP: addr, Uconn: star.UDPConn, nickName: star.setNickName, getName: star.getName, queue: star.Queue})
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}
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}
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star.connMu.Lock()
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star.udpPool[addr.String()] = addr
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star.connMu.Unlock()
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}
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if err != nil {
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continue
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}
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}
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}()
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star.Online = true
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return &star, nil
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}
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func notudps(netype, value string) (*StarNotifyS, error) {
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var err error
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var star StarNotifyS
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star.starinits()
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star.isUDP = false
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star.listener, err = net.Listen(netype, value)
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if err != nil {
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return nil, err
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}
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go star.notify()
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go func() {
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<-star.stopSign.Done()
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star.connPool.Range(func(a, b interface{}) bool {
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k := a.(string)
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v := b.(net.Conn)
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v.Close()
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star.connPool.Delete(a)
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for k2, v2 := range star.nickName {
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if v2 == k {
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star.funcMu.Lock()
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delete(star.nickName, k2)
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star.funcMu.Unlock()
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}
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}
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return true
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})
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star.listener.Close()
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star.Online = false
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return
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}()
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go func() {
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for {
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conn, err := star.listener.Accept()
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if err != nil {
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select {
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case <-star.stopSign.Done():
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star.listener.Close()
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return
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default:
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continue
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}
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}
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if !star.ReadDeadline.IsZero() {
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conn.SetReadDeadline(star.ReadDeadline)
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}
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if !star.WriteDeadline.IsZero() {
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conn.SetWriteDeadline(star.WriteDeadline)
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}
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if !star.Deadline.IsZero() {
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conn.SetDeadline(star.Deadline)
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}
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go func(conn net.Conn) {
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for {
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buf := make([]byte, 8192)
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n, err := conn.Read(buf)
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if n != 0 {
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star.Queue.ParseMessage(buf[0:n], conn)
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}
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if err != nil {
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conn.Close()
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star.connPool.Delete(fmt.Sprint(conn))
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for k, v := range star.nickName {
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if v == fmt.Sprint(conn) {
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delete(star.nickName, k)
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}
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}
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break
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}
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}
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}(conn)
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star.connPool.Store(fmt.Sprint(conn), conn)
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if star.Connected != nil {
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go star.Connected(SMsg{Conn: conn, nickName: star.setNickName, getName: star.getName, queue: star.Queue})
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}
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}
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}()
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star.Online = true
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return &star, nil
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}
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func (star *StarNotifyS) GetListenerInfo() net.Listener {
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return star.listener
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}
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// SetNotify 用于设置通知关键词的调用函数
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func (star *StarNotifyS) setNickName(name string, conn string) error {
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if _, ok := star.connPool.Load(conn); !ok {
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if _, ok := star.udpPool[conn]; !ok {
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return errors.New("Conn Not Found")
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}
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}
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for k, v := range star.nickName {
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if v == conn {
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delete(star.nickName, k)
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}
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}
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star.funcMu.Lock()
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star.nickName[name] = conn
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star.funcMu.Unlock()
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return nil
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}
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// SetNotify 用于设置通知关键词的调用函数
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func (star *StarNotifyS) SetNotify(name string, data func(SMsg) string) {
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star.funcMu.Lock()
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defer star.funcMu.Unlock()
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if data == nil {
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if _, ok := star.FuncLists[name]; ok {
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delete(star.FuncLists, name)
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}
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return
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}
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star.FuncLists[name] = data
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}
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// SetDefaultNotify 用于设置默认关键词的调用函数
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|
|
func (star *StarNotifyS) SetDefaultNotify(data func(SMsg) string) {
|
|
|
star.defaultFunc = data
|
|
|
}
|
|
|
|
|
|
func (star *StarNotifyS) trim(name string) string {
|
|
|
var slash bool = false
|
|
|
var key []byte
|
|
|
for _, v := range []byte(name) {
|
|
|
if v == byte(92) && !slash {
|
|
|
slash = true
|
|
|
continue
|
|
|
}
|
|
|
slash = false
|
|
|
key = append(key, v)
|
|
|
}
|
|
|
return string(key)
|
|
|
}
|
|
|
|
|
|
func (star *StarNotifyS) notify() {
|
|
|
for {
|
|
|
select {
|
|
|
case <-star.stopSign.Done():
|
|
|
return
|
|
|
default:
|
|
|
}
|
|
|
data, err := star.Queue.RestoreOne()
|
|
|
if err != nil {
|
|
|
time.Sleep(time.Millisecond * 500)
|
|
|
continue
|
|
|
}
|
|
|
mode, key, value := star.analyseData(string(data.Msg))
|
|
|
if mode == key && mode == value && mode == "" {
|
|
|
continue
|
|
|
}
|
|
|
var rmsg SMsg
|
|
|
if !star.isUDP {
|
|
|
rmsg = SMsg{data.Conn.(net.Conn), key, value, nil, nil, mode, nil, star.setNickName, star.getName, star.Queue}
|
|
|
} else {
|
|
|
rmsg = SMsg{nil, key, value, data.Conn.(*net.UDPAddr), star.UDPConn, mode, nil, star.setNickName, star.getName, star.Queue}
|
|
|
if key == "b612ryzstop" {
|
|
|
star.connMu.Lock()
|
|
|
delete(star.udpPool, rmsg.UDP.String())
|
|
|
star.connMu.Unlock()
|
|
|
for k, v := range star.nickName {
|
|
|
if v == rmsg.UDP.String() {
|
|
|
delete(star.nickName, k)
|
|
|
}
|
|
|
}
|
|
|
continue
|
|
|
}
|
|
|
}
|
|
|
replyFunc := func(key string, rmsg SMsg) {
|
|
|
if msg, ok := star.FuncLists[key]; ok {
|
|
|
sdata := msg(rmsg)
|
|
|
if sdata == "" {
|
|
|
return
|
|
|
}
|
|
|
rmsg.Reply(sdata)
|
|
|
} else {
|
|
|
if star.defaultFunc != nil {
|
|
|
sdata := star.defaultFunc(rmsg)
|
|
|
if sdata == "" {
|
|
|
return
|
|
|
}
|
|
|
rmsg.Reply(sdata)
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
if mode[0:2] != "sr" {
|
|
|
if !star.Sync {
|
|
|
go replyFunc(key, rmsg)
|
|
|
} else {
|
|
|
replyFunc(key, rmsg)
|
|
|
}
|
|
|
} else {
|
|
|
if sa, ok := star.lockPool[mode]; ok {
|
|
|
rmsg.wait = sa.wait
|
|
|
star.lockMu.Lock()
|
|
|
star.lockPool[mode] = rmsg
|
|
|
star.lockPool[mode].wait <- 1
|
|
|
star.lockMu.Unlock()
|
|
|
} else {
|
|
|
if !star.Sync {
|
|
|
go replyFunc(key, rmsg)
|
|
|
} else {
|
|
|
replyFunc(key, rmsg)
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
func (star *StarNotifyS) analyseData(msg string) (mode, key, value string) {
|
|
|
slice := strings.SplitN(msg, "||", 3)
|
|
|
if len(slice) < 3 {
|
|
|
return "", "", ""
|
|
|
}
|
|
|
return slice[0], star.trim(slice[1]), slice[2]
|
|
|
}
|
|
|
|
|
|
// ServerStop 用于终止Server端运行
|
|
|
func (star *StarNotifyS) ServerStop() {
|
|
|
star.cancel()
|
|
|
}
|