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286 lines
9.2 KiB
286 lines
9.2 KiB
2 years ago
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package gate
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import (
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"Open_IM/pkg/common/config"
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"Open_IM/pkg/common/constant"
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"Open_IM/pkg/common/db"
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"Open_IM/pkg/common/log"
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"Open_IM/pkg/common/token_verify"
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"Open_IM/pkg/utils"
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"bytes"
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"encoding/gob"
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"github.com/garyburd/redigo/redis"
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"net/http"
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"sync"
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"time"
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"github.com/gorilla/websocket"
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)
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type UserConn struct {
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*websocket.Conn
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w *sync.Mutex
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}
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type WServer struct {
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wsAddr string
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wsMaxConnNum int
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wsUpGrader *websocket.Upgrader
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wsConnToUser map[*UserConn]map[string]string
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wsUserToConn map[string]map[string]*UserConn
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}
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func (ws *WServer) onInit(wsPort int) {
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ws.wsAddr = ":" + utils.IntToString(wsPort)
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ws.wsMaxConnNum = config.Config.LongConnSvr.WebsocketMaxConnNum
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ws.wsConnToUser = make(map[*UserConn]map[string]string)
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ws.wsUserToConn = make(map[string]map[string]*UserConn)
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ws.wsUpGrader = &websocket.Upgrader{
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HandshakeTimeout: time.Duration(config.Config.LongConnSvr.WebsocketTimeOut) * time.Second,
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ReadBufferSize: config.Config.LongConnSvr.WebsocketMaxMsgLen,
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CheckOrigin: func(r *http.Request) bool { return true },
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}
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}
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func (ws *WServer) run() {
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http.HandleFunc("/", ws.wsHandler) //Get request from client to handle by wsHandler
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err := http.ListenAndServe(ws.wsAddr, nil) //Start listening
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if err != nil {
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log.ErrorByKv("Ws listening err", "", "err", err.Error())
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}
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}
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func (ws *WServer) wsHandler(w http.ResponseWriter, r *http.Request) {
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if ws.headerCheck(w, r) {
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query := r.URL.Query()
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conn, err := ws.wsUpGrader.Upgrade(w, r, nil) //Conn is obtained through the upgraded escalator
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if err != nil {
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log.ErrorByKv("upgrade http conn err", "", "err", err)
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return
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} else {
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//Connection mapping relationship,
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//userID+" "+platformID->conn
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//Initialize a lock for each user
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newConn := &UserConn{conn, new(sync.Mutex)}
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ws.addUserConn(query["sendID"][0], int32(utils.StringToInt64(query["platformID"][0])), newConn, query["token"][0])
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go ws.readMsg(newConn)
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}
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}
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}
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func (ws *WServer) readMsg(conn *UserConn) {
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for {
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messageType, msg, err := conn.ReadMessage()
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if messageType == websocket.PingMessage {
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log.NewInfo("", "this is a pingMessage")
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}
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if err != nil {
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uid, platform := ws.getUserUid(conn)
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log.ErrorByKv("WS ReadMsg error", "", "userIP", conn.RemoteAddr().String(), "userUid", uid, "platform", platform, "error", err.Error())
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ws.delUserConn(conn)
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return
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} else {
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//log.ErrorByKv("test", "", "msgType", msgType, "userIP", conn.RemoteAddr().String(), "userUid", ws.getUserUid(conn))
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}
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ws.msgParse(conn, msg)
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//ws.writeMsg(conn, 1, chat)
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}
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}
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func (ws *WServer) writeMsg(conn *UserConn, a int, msg []byte) error {
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conn.w.Lock()
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defer conn.w.Unlock()
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return conn.WriteMessage(a, msg)
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}
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func (ws *WServer) MultiTerminalLoginChecker(uid string, platformID int32, newConn *UserConn, token string, operationID string) {
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switch config.Config.MultiLoginPolicy {
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case constant.AllLoginButSameTermKick:
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if oldConnMap, ok := ws.wsUserToConn[uid]; ok { // user->map[platform->conn]
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if oldConn, ok := oldConnMap[constant.PlatformIDToName(platformID)]; ok {
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log.NewDebug(operationID, uid, platformID, "kick old conn")
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ws.sendKickMsg(oldConn, newConn)
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m, err := db.DB.GetTokenMapByUidPid(uid, constant.PlatformIDToName(platformID))
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if err != nil && err != redis.ErrNil {
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log.NewError(operationID, "get token from redis err", err.Error())
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return
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}
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if m == nil {
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log.NewError(operationID, "get token from redis err", "m is nil")
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return
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}
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for k, _ := range m {
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if k != token {
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m[k] = constant.KickedToken
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}
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}
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log.NewDebug(operationID, "get map is ", m)
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err = db.DB.SetTokenMapByUidPid(uid, platformID, m)
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if err != nil {
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log.NewError(operationID, "SetTokenMapByUidPid err", err.Error())
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return
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}
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err = oldConn.Close()
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delete(oldConnMap, constant.PlatformIDToName(platformID))
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ws.wsUserToConn[uid] = oldConnMap
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if len(oldConnMap) == 0 {
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delete(ws.wsUserToConn, uid)
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}
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delete(ws.wsConnToUser, oldConn)
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if err != nil {
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log.NewError(operationID, "conn close err", err.Error(), uid, platformID)
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}
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} else {
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log.NewWarn(operationID, "abnormal uid-conn ", uid, platformID, oldConnMap[constant.PlatformIDToName(platformID)])
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}
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} else {
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log.NewDebug(operationID, "no other conn", ws.wsUserToConn, uid, platformID)
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}
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case constant.SingleTerminalLogin:
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case constant.WebAndOther:
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}
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}
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func (ws *WServer) sendKickMsg(oldConn, newConn *UserConn) {
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mReply := Resp{
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ReqIdentifier: constant.WSKickOnlineMsg,
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ErrCode: constant.ErrTokenInvalid.ErrCode,
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ErrMsg: constant.ErrTokenInvalid.ErrMsg,
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}
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var b bytes.Buffer
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enc := gob.NewEncoder(&b)
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err := enc.Encode(mReply)
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if err != nil {
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log.NewError(mReply.OperationID, mReply.ReqIdentifier, mReply.ErrCode, mReply.ErrMsg, "Encode Msg error", oldConn.RemoteAddr().String(), newConn.RemoteAddr().String(), err.Error())
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return
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}
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err = ws.writeMsg(oldConn, websocket.BinaryMessage, b.Bytes())
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if err != nil {
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log.NewError(mReply.OperationID, mReply.ReqIdentifier, mReply.ErrCode, mReply.ErrMsg, "WS WriteMsg error", oldConn.RemoteAddr().String(), newConn.RemoteAddr().String(), err.Error())
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}
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}
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func (ws *WServer) addUserConn(uid string, platformID int32, conn *UserConn, token string) {
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rwLock.Lock()
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defer rwLock.Unlock()
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operationID := utils.OperationIDGenerator()
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ws.MultiTerminalLoginChecker(uid, platformID, conn, token, operationID)
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if oldConnMap, ok := ws.wsUserToConn[uid]; ok {
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oldConnMap[constant.PlatformIDToName(platformID)] = conn
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ws.wsUserToConn[uid] = oldConnMap
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log.Debug(operationID, "user not first come in, add conn ", uid, platformID, conn, oldConnMap)
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} else {
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i := make(map[string]*UserConn)
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i[constant.PlatformIDToName(platformID)] = conn
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ws.wsUserToConn[uid] = i
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log.Debug(operationID, "user first come in, new user, conn", uid, platformID, conn, ws.wsUserToConn[uid])
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}
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if oldStringMap, ok := ws.wsConnToUser[conn]; ok {
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oldStringMap[constant.PlatformIDToName(platformID)] = uid
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ws.wsConnToUser[conn] = oldStringMap
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} else {
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i := make(map[string]string)
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i[constant.PlatformIDToName(platformID)] = uid
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ws.wsConnToUser[conn] = i
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}
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count := 0
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for _, v := range ws.wsUserToConn {
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count = count + len(v)
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}
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log.Debug(operationID, "WS Add operation", "", "wsUser added", ws.wsUserToConn, "connection_uid", uid, "connection_platform", constant.PlatformIDToName(platformID), "online_user_num", len(ws.wsUserToConn), "online_conn_num", count)
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userCount = uint64(len(ws.wsUserToConn))
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}
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func (ws *WServer) delUserConn(conn *UserConn) {
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rwLock.Lock()
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defer rwLock.Unlock()
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var platform, uid string
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if oldStringMap, ok := ws.wsConnToUser[conn]; ok {
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for k, v := range oldStringMap {
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platform = k
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uid = v
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}
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if oldConnMap, ok := ws.wsUserToConn[uid]; ok {
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delete(oldConnMap, platform)
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ws.wsUserToConn[uid] = oldConnMap
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if len(oldConnMap) == 0 {
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delete(ws.wsUserToConn, uid)
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}
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count := 0
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for _, v := range ws.wsUserToConn {
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count = count + len(v)
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}
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log.WarnByKv("WS delete operation", "", "wsUser deleted", ws.wsUserToConn, "disconnection_uid", uid, "disconnection_platform", platform, "online_user_num", len(ws.wsUserToConn), "online_conn_num", count)
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} else {
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log.WarnByKv("WS delete operation", "", "wsUser deleted", ws.wsUserToConn, "disconnection_uid", uid, "disconnection_platform", platform, "online_user_num", len(ws.wsUserToConn))
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}
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userCount = uint64(len(ws.wsUserToConn))
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delete(ws.wsConnToUser, conn)
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}
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err := conn.Close()
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if err != nil {
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log.ErrorByKv("close err", "", "uid", uid, "platform", platform)
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}
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}
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func (ws *WServer) getUserConn(uid string, platform string) *UserConn {
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rwLock.RLock()
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defer rwLock.RUnlock()
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if connMap, ok := ws.wsUserToConn[uid]; ok {
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if conn, flag := connMap[platform]; flag {
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return conn
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}
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}
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return nil
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}
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func (ws *WServer) getSingleUserAllConn(uid string) map[string]*UserConn {
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rwLock.RLock()
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defer rwLock.RUnlock()
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if connMap, ok := ws.wsUserToConn[uid]; ok {
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return connMap
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}
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return nil
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}
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func (ws *WServer) getUserUid(conn *UserConn) (uid, platform string) {
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rwLock.RLock()
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defer rwLock.RUnlock()
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if stringMap, ok := ws.wsConnToUser[conn]; ok {
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for k, v := range stringMap {
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platform = k
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uid = v
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}
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return uid, platform
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}
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return "", ""
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}
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func (ws *WServer) headerCheck(w http.ResponseWriter, r *http.Request) bool {
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status := http.StatusUnauthorized
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query := r.URL.Query()
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if len(query["token"]) != 0 && len(query["sendID"]) != 0 && len(query["platformID"]) != 0 {
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if ok, err, msg := token_verify.WsVerifyToken(query["token"][0], query["sendID"][0], query["platformID"][0]); !ok {
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e := err.(*constant.ErrInfo)
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log.ErrorByKv("Token verify failed", "", "query", query, msg)
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w.Header().Set("Sec-Websocket-Version", "13")
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http.Error(w, e.ErrMsg, int(e.ErrCode))
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return false
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} else {
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log.InfoByKv("Connection Authentication Success", "", "token", query["token"][0], "userID", query["sendID"][0])
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return true
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}
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} else {
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log.ErrorByKv("Args err", "", "query", query)
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w.Header().Set("Sec-Websocket-Version", "13")
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http.Error(w, http.StatusText(status), status)
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return false
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}
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}
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func genMapKey(uid string, platformID int32) string {
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return uid + " " + constant.PlatformIDToName(platformID)
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}
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