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446 lines
14 KiB
446 lines
14 KiB
// Copyright © 2023 OpenIM. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package msggateway
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import (
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"context"
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"fmt"
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"github.com/openimsdk/open-im-server/v3/pkg/common/webhook"
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pbAuth "github.com/openimsdk/protocol/auth"
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"github.com/openimsdk/tools/mcontext"
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"net/http"
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"sync"
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"sync/atomic"
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"time"
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"github.com/go-playground/validator/v10"
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"github.com/openimsdk/open-im-server/v3/pkg/common/prommetrics"
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"github.com/openimsdk/open-im-server/v3/pkg/common/servererrs"
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"github.com/openimsdk/open-im-server/v3/pkg/rpcclient"
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"github.com/openimsdk/protocol/constant"
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"github.com/openimsdk/protocol/msggateway"
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"github.com/openimsdk/tools/discovery"
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"github.com/openimsdk/tools/errs"
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"github.com/openimsdk/tools/log"
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"github.com/openimsdk/tools/utils/stringutil"
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"golang.org/x/sync/errgroup"
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)
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type LongConnServer interface {
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Run(done chan error) error
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wsHandler(w http.ResponseWriter, r *http.Request)
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GetUserAllCons(userID string) ([]*Client, bool)
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GetUserPlatformCons(userID string, platform int) ([]*Client, bool, bool)
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Validate(s any) error
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SetDiscoveryRegistry(client discovery.SvcDiscoveryRegistry, config *Config)
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KickUserConn(client *Client) error
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UnRegister(c *Client)
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SetKickHandlerInfo(i *kickHandler)
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Compressor
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Encoder
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MessageHandler
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}
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type WsServer struct {
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msgGatewayConfig *Config
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port int
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wsMaxConnNum int64
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registerChan chan *Client
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unregisterChan chan *Client
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kickHandlerChan chan *kickHandler
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clients *UserMap
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clientPool sync.Pool
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onlineUserNum atomic.Int64
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onlineUserConnNum atomic.Int64
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handshakeTimeout time.Duration
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writeBufferSize int
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validate *validator.Validate
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userClient *rpcclient.UserRpcClient
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authClient *rpcclient.Auth
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disCov discovery.SvcDiscoveryRegistry
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Compressor
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Encoder
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MessageHandler
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webhookClient *webhook.Client
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}
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type kickHandler struct {
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clientOK bool
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oldClients []*Client
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newClient *Client
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}
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func (ws *WsServer) SetDiscoveryRegistry(disCov discovery.SvcDiscoveryRegistry, config *Config) {
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ws.MessageHandler = NewGrpcHandler(ws.validate, disCov, &config.Share.RpcRegisterName)
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u := rpcclient.NewUserRpcClient(disCov, config.Share.RpcRegisterName.User, config.Share.IMAdminUserID)
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ws.authClient = rpcclient.NewAuth(disCov, config.Share.RpcRegisterName.Auth)
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ws.userClient = &u
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ws.disCov = disCov
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}
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func (ws *WsServer) SetUserOnlineStatus(ctx context.Context, client *Client, status int32) {
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err := ws.userClient.SetUserStatus(ctx, client.UserID, status, client.PlatformID)
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if err != nil {
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log.ZWarn(ctx, "SetUserStatus err", err)
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}
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switch status {
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case constant.Online:
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ws.webhookAfterUserOnline(ctx, &ws.msgGatewayConfig.WebhooksConfig.AfterUserOnline, client.UserID, client.PlatformID, client.IsBackground, client.ctx.GetConnID())
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case constant.Offline:
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ws.webhookAfterUserOffline(ctx, &ws.msgGatewayConfig.WebhooksConfig.AfterUserOffline, client.UserID, client.PlatformID, client.ctx.GetConnID())
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}
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}
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func (ws *WsServer) UnRegister(c *Client) {
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ws.unregisterChan <- c
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}
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func (ws *WsServer) Validate(_ any) error {
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return nil
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}
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func (ws *WsServer) GetUserAllCons(userID string) ([]*Client, bool) {
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return ws.clients.GetAll(userID)
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}
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func (ws *WsServer) GetUserPlatformCons(userID string, platform int) ([]*Client, bool, bool) {
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return ws.clients.Get(userID, platform)
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}
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func NewWsServer(msgGatewayConfig *Config, opts ...Option) (*WsServer, error) {
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var config configs
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for _, o := range opts {
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o(&config)
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}
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v := validator.New()
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return &WsServer{
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msgGatewayConfig: msgGatewayConfig,
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port: config.port,
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wsMaxConnNum: config.maxConnNum,
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writeBufferSize: config.writeBufferSize,
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handshakeTimeout: config.handshakeTimeout,
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clientPool: sync.Pool{
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New: func() any {
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return new(Client)
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},
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},
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registerChan: make(chan *Client, 1000),
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unregisterChan: make(chan *Client, 1000),
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kickHandlerChan: make(chan *kickHandler, 1000),
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validate: v,
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clients: newUserMap(),
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Compressor: NewGzipCompressor(),
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Encoder: NewGobEncoder(),
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webhookClient: webhook.NewWebhookClient(msgGatewayConfig.WebhooksConfig.URL),
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}, nil
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}
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func (ws *WsServer) Run(done chan error) error {
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var (
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client *Client
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netErr error
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shutdownDone = make(chan struct{}, 1)
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)
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server := http.Server{Addr: ":" + stringutil.IntToString(ws.port), Handler: nil}
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go func() {
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for {
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select {
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case <-shutdownDone:
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return
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case client = <-ws.registerChan:
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ws.registerClient(client)
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case client = <-ws.unregisterChan:
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ws.unregisterClient(client)
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case onlineInfo := <-ws.kickHandlerChan:
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ws.multiTerminalLoginChecker(onlineInfo.clientOK, onlineInfo.oldClients, onlineInfo.newClient)
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}
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}
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}()
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netDone := make(chan struct{}, 1)
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go func() {
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http.HandleFunc("/", ws.wsHandler)
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err := server.ListenAndServe()
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defer close(netDone)
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if err != nil && err != http.ErrServerClosed {
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netErr = errs.WrapMsg(err, "ws start err", server.Addr)
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}
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}()
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ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
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defer cancel()
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var err error
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select {
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case err = <-done:
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sErr := server.Shutdown(ctx)
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if sErr != nil {
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return errs.WrapMsg(sErr, "shutdown err")
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}
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close(shutdownDone)
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if err != nil {
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return err
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}
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case <-netDone:
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}
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return netErr
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}
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var concurrentRequest = 3
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func (ws *WsServer) sendUserOnlineInfoToOtherNode(ctx context.Context, client *Client) error {
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conns, err := ws.disCov.GetConns(ctx, ws.msgGatewayConfig.Share.RpcRegisterName.MessageGateway)
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if err != nil {
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return err
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}
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wg := errgroup.Group{}
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wg.SetLimit(concurrentRequest)
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// Online push user online message to other node
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for _, v := range conns {
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v := v
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log.ZDebug(ctx, " sendUserOnlineInfoToOtherNode conn ", "target", v.Target())
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if v.Target() == ws.disCov.GetSelfConnTarget() {
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log.ZDebug(ctx, "Filter out this node", "node", v.Target())
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continue
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}
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wg.Go(func() error {
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msgClient := msggateway.NewMsgGatewayClient(v)
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_, err := msgClient.MultiTerminalLoginCheck(ctx, &msggateway.MultiTerminalLoginCheckReq{
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UserID: client.UserID,
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PlatformID: int32(client.PlatformID), Token: client.token,
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})
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if err != nil {
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log.ZWarn(ctx, "MultiTerminalLoginCheck err", err, "node", v.Target())
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}
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return nil
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})
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}
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_ = wg.Wait()
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return nil
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}
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func (ws *WsServer) SetKickHandlerInfo(i *kickHandler) {
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ws.kickHandlerChan <- i
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}
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func (ws *WsServer) registerClient(client *Client) {
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var (
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userOK bool
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clientOK bool
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oldClients []*Client
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)
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oldClients, userOK, clientOK = ws.clients.Get(client.UserID, client.PlatformID)
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if !userOK {
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ws.clients.Set(client.UserID, client)
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log.ZDebug(client.ctx, "user not exist", "userID", client.UserID, "platformID", client.PlatformID)
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prommetrics.OnlineUserGauge.Add(1)
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ws.onlineUserNum.Add(1)
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ws.onlineUserConnNum.Add(1)
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} else {
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ws.multiTerminalLoginChecker(clientOK, oldClients, client)
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log.ZDebug(client.ctx, "user exist", "userID", client.UserID, "platformID", client.PlatformID)
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if clientOK {
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ws.clients.Set(client.UserID, client)
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// There is already a connection to the platform
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log.ZInfo(client.ctx, "repeat login", "userID", client.UserID, "platformID",
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client.PlatformID, "old remote addr", getRemoteAdders(oldClients))
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ws.onlineUserConnNum.Add(1)
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} else {
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ws.clients.Set(client.UserID, client)
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ws.onlineUserConnNum.Add(1)
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}
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}
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wg := sync.WaitGroup{}
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log.ZDebug(client.ctx, "ws.msgGatewayConfig.Discovery.Enable", ws.msgGatewayConfig.Discovery.Enable)
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if ws.msgGatewayConfig.Discovery.Enable != "k8s" {
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wg.Add(1)
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go func() {
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defer wg.Done()
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_ = ws.sendUserOnlineInfoToOtherNode(client.ctx, client)
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}()
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}
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wg.Add(1)
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go func() {
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defer wg.Done()
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ws.SetUserOnlineStatus(client.ctx, client, constant.Online)
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}()
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wg.Wait()
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log.ZInfo(
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client.ctx,
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"user online",
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"online user Num",
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ws.onlineUserNum.Load(),
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"online user conn Num",
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ws.onlineUserConnNum.Load(),
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)
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}
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func getRemoteAdders(client []*Client) string {
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var ret string
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for i, c := range client {
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if i == 0 {
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ret = c.ctx.GetRemoteAddr()
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} else {
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ret += "@" + c.ctx.GetRemoteAddr()
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}
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}
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return ret
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}
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func (ws *WsServer) KickUserConn(client *Client) error {
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ws.clients.deleteClients(client.UserID, []*Client{client})
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return client.KickOnlineMessage()
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}
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func (ws *WsServer) multiTerminalLoginChecker(clientOK bool, oldClients []*Client, newClient *Client) {
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switch ws.msgGatewayConfig.MsgGateway.MultiLoginPolicy {
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case constant.DefalutNotKick:
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case constant.PCAndOther:
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if constant.PlatformIDToClass(newClient.PlatformID) == constant.TerminalPC {
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return
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}
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fallthrough
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case constant.AllLoginButSameTermKick:
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if !clientOK {
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return
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}
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ws.clients.deleteClients(newClient.UserID, oldClients)
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for _, c := range oldClients {
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err := c.KickOnlineMessage()
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if err != nil {
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log.ZWarn(c.ctx, "KickOnlineMessage", err)
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}
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}
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ctx := mcontext.WithMustInfoCtx(
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[]string{newClient.ctx.GetOperationID(), newClient.ctx.GetUserID(),
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constant.PlatformIDToName(newClient.PlatformID), newClient.ctx.GetConnID()},
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)
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if _, err := ws.authClient.InvalidateToken(ctx, newClient.token, newClient.UserID, newClient.PlatformID); err != nil {
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log.ZWarn(newClient.ctx, "InvalidateToken err", err, "userID", newClient.UserID,
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"platformID", newClient.PlatformID)
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}
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}
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}
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func (ws *WsServer) unregisterClient(client *Client) {
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defer ws.clientPool.Put(client)
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isDeleteUser := ws.clients.delete(client.UserID, client.ctx.GetRemoteAddr())
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if isDeleteUser {
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ws.onlineUserNum.Add(-1)
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prommetrics.OnlineUserGauge.Dec()
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}
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ws.onlineUserConnNum.Add(-1)
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ws.SetUserOnlineStatus(client.ctx, client, constant.Offline)
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log.ZInfo(client.ctx, "user offline", "close reason", client.closedErr, "online user Num",
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ws.onlineUserNum.Load(), "online user conn Num",
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ws.onlineUserConnNum.Load(),
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)
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}
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// validateRespWithRequest checks if the response matches the expected userID and platformID.
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func (ws *WsServer) validateRespWithRequest(ctx *UserConnContext, resp *pbAuth.ParseTokenResp) error {
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userID := ctx.GetUserID()
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platformID := stringutil.StringToInt32(ctx.GetPlatformID())
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if resp.UserID != userID {
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return servererrs.ErrTokenInvalid.WrapMsg(fmt.Sprintf("token uid %s != userID %s", resp.UserID, userID))
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}
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if resp.PlatformID != platformID {
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return servererrs.ErrTokenInvalid.WrapMsg(fmt.Sprintf("token platform %d != platformID %d", resp.PlatformID, platformID))
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}
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return nil
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}
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func (ws *WsServer) wsHandler(w http.ResponseWriter, r *http.Request) {
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// Create a new connection context
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connContext := newContext(w, r)
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// Check if the current number of online user connections exceeds the maximum limit
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if ws.onlineUserConnNum.Load() >= ws.wsMaxConnNum {
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// If it exceeds the maximum connection number, return an error via HTTP and stop processing
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httpError(connContext, servererrs.ErrConnOverMaxNumLimit.WrapMsg("over max conn num limit"))
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return
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}
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// Parse essential arguments (e.g., user ID, Token)
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err := connContext.ParseEssentialArgs()
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if err != nil {
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// If there's an error during parsing, return an error via HTTP and stop processing
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httpError(connContext, err)
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return
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}
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// Call the authentication client to parse the Token obtained from the context
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resp, err := ws.authClient.ParseToken(connContext, connContext.GetToken())
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if err != nil {
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// If there's an error parsing the Token, decide whether to send the error message via WebSocket based on the context flag
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shouldSendError := connContext.ShouldSendResp()
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if shouldSendError {
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// Create a WebSocket connection object and attempt to send the error message via WebSocket
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wsLongConn := newGWebSocket(WebSocket, ws.handshakeTimeout, ws.writeBufferSize)
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if err := wsLongConn.RespondWithError(err, w, r); err == nil {
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// If the error message is successfully sent via WebSocket, stop processing
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return
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}
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}
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// If sending via WebSocket is not required or fails, return the error via HTTP and stop processing
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httpError(connContext, err)
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return
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}
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// Validate the authentication response matches the request (e.g., user ID and platform ID)
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err = ws.validateRespWithRequest(connContext, resp)
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if err != nil {
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// If validation fails, return an error via HTTP and stop processing
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httpError(connContext, err)
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return
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}
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// Create a WebSocket long connection object
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wsLongConn := newGWebSocket(WebSocket, ws.handshakeTimeout, ws.writeBufferSize)
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if err := wsLongConn.GenerateLongConn(w, r); err != nil {
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//If the creation of the long connection fails, the error is handled internally during the handshake process.
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log.ZWarn(connContext, "long connection fails", err)
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return
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} else {
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// Check if a normal response should be sent via WebSocket
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shouldSendSuccessResp := connContext.ShouldSendResp()
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if shouldSendSuccessResp {
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// Attempt to send a success message through WebSocket
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if err := wsLongConn.RespondWithSuccess(); err != nil {
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// If the success message is successfully sent, end further processing
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return
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}
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}
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}
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// Retrieve a client object from the client pool, reset its state, and associate it with the current WebSocket long connection
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client := ws.clientPool.Get().(*Client)
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client.ResetClient(connContext, wsLongConn, ws)
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// Register the client with the server and start message processing
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ws.registerChan <- client
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go client.readMessage()
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}
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