✨ add comment message push

api/websocket_api/gws_api.go

@@ -1,10 +1,13 @@
 package websocket_api
 
 import (
+	"context"
 	"fmt"
 	"github.com/gin-gonic/gin"
 	"github.com/lxzan/gws"
 	"net/http"
+	"schisandra-cloud-album/common/constant"
+	"schisandra-cloud-album/common/redis"
 	"schisandra-cloud-album/global"
 	"time"
 )
@@ -14,6 +17,11 @@ const (
 	HeartbeatWaitTimeout = 10 * time.Second // 心跳等待超时时间
 )
 
+type WebSocket struct {
+	gws.BuiltinEventHandler
+	sessions *gws.ConcurrentMap[string, *gws.Conn] // 使用内置的ConcurrentMap存储连接, 可以减少锁冲突
+}
+
 var Handler = NewWebSocket()
 
 // NewGWSServer 创建websocket服务
@@ -33,6 +41,10 @@ func (WebsocketAPI) NewGWSServer(c *gin.Context) {
 			Enabled: true, // 开启压缩
 		},
 		Authorize: func(r *http.Request, session gws.SessionStorage) bool {
+			origin := r.Header.Get("Origin")
+			if origin != global.CONFIG.System.WebURL() {
+				return false
+			}
 			var clientId = r.URL.Query().Get("client_id")
 			if clientId == "" {
 				return false
@@ -49,6 +61,8 @@ func (WebsocketAPI) NewGWSServer(c *gin.Context) {
 		socket.ReadLoop() // 此处阻塞会使请求上下文不能顺利被GC
 	}()
 }
+
+// MustLoad 从session中加载数据
 func MustLoad[T any](session gws.SessionStorage, key string) (v T) {
 	if value, exist := session.Load(key); exist {
 		v = value.(T)
@@ -56,26 +70,23 @@ func MustLoad[T any](session gws.SessionStorage, key string) (v T) {
 	return
 }
 
+// NewWebSocket 创建WebSocket实例
 func NewWebSocket() *WebSocket {
 	return &WebSocket{
 		sessions: gws.NewConcurrentMap[string, *gws.Conn](64, 128),
 	}
 }
 
-type WebSocket struct {
-	gws.BuiltinEventHandler
-	sessions *gws.ConcurrentMap[string, *gws.Conn] // 使用内置的ConcurrentMap存储连接, 可以减少锁冲突
-}
-
+// OnOpen 连接建立
 func (c *WebSocket) OnOpen(socket *gws.Conn) {
-	name := MustLoad[string](socket.Session(), "client_id")
-	if conn, ok := c.sessions.Load(name); ok {
-		conn.WriteClose(1000, []byte("connection is replaced"))
-	}
-	c.sessions.Store(name, socket)
-	global.LOG.Printf("%s connected\n", name)
+	clientId := MustLoad[string](socket.Session(), "client_id")
+	c.sessions.Store(clientId, socket)
+	// 订阅该用户的频道
+	go c.subscribeUserChannel(clientId)
+	fmt.Printf("websocket client %s connected\n", clientId)
 }
 
+// OnClose 关闭连接
 func (c *WebSocket) OnClose(socket *gws.Conn, err error) {
 	name := MustLoad[string](socket.Session(), "client_id")
 	sharding := c.sessions.GetSharding(name)
@@ -86,17 +97,20 @@ func (c *WebSocket) OnClose(socket *gws.Conn, err error) {
 	global.LOG.Printf("onerror, name=%s, msg=%s\n", name, err.Error())
 }
 
+// OnPing 处理客户端的Ping消息
 func (c *WebSocket) OnPing(socket *gws.Conn, payload []byte) {
 	_ = socket.SetDeadline(time.Now().Add(PingInterval + HeartbeatWaitTimeout))
 	_ = socket.WritePong(payload)
 }
 
+// OnPong 处理客户端的Pong消息
 func (c *WebSocket) OnPong(_ *gws.Conn, _ []byte) {}
 
+// OnMessage 接受消息
 func (c *WebSocket) OnMessage(socket *gws.Conn, message *gws.Message) {
 	defer message.Close()
-	name := MustLoad[string](socket.Session(), "client_id")
-	if conn, ok := c.sessions.Load(name); ok {
+	clientId := MustLoad[string](socket.Session(), "client_id")
+	if conn, ok := c.sessions.Load(clientId); ok {
 		_ = conn.WriteMessage(gws.OpcodeText, message.Bytes())
 	}
 }
@@ -109,3 +123,60 @@ func (c *WebSocket) SendMessageToClient(clientId string, message []byte) error {
 	}
 	return fmt.Errorf("client %s not found", clientId)
 }
+
+// SendMessageToUser 发送消息到指定用户的 Redis 频道
+func (c *WebSocket) SendMessageToUser(clientId string, message []byte) error {
+	if _, ok := c.sessions.Load(clientId); ok {
+		return redis.Publish(clientId, message).Err()
+	} else {
+		return redis.LPush(constant.CommentOfflineMessageRedisKey+clientId, message).Err()
+	}
+}
+
+// 订阅用户频道
+func (c *WebSocket) subscribeUserChannel(clientId string) {
+	conn, ok := c.sessions.Load(clientId)
+	if !ok {
+		return
+	}
+
+	// 获取离线消息
+	messages, err := redis.LRange(constant.CommentOfflineMessageRedisKey+clientId, 0, -1).Result()
+	if err != nil {
+		global.LOG.Printf("Error loading offline messages for user %s: %v\n", clientId, err)
+		return
+	}
+
+	// 逐条发送离线消息
+	for _, msg := range messages {
+		if writeErr := conn.WriteMessage(gws.OpcodeText, []byte(msg)); writeErr != nil {
+			global.LOG.Printf("Error writing offline message to user %s: %v\n", clientId, writeErr)
+			return
+		}
+	}
+
+	// 清空离线消息列表
+	if delErr := redis.Del(constant.CommentOfflineMessageRedisKey + clientId); delErr.Err() != nil {
+		global.LOG.Printf("Error clearing offline messages for user %s: %v\n", clientId, delErr.Err())
+	}
+
+	pubsub := redis.Subscribe(clientId)
+	defer func() {
+		if closeErr := pubsub.Close(); closeErr != nil {
+			global.LOG.Printf("Error closing pubsub for user %s: %v\n", clientId, closeErr)
+		}
+	}()
+
+	for {
+		msg, waitErr := pubsub.ReceiveMessage(context.Background())
+		if waitErr != nil {
+			global.LOG.Printf("Error receiving message for user %s: %v\n", clientId, err)
+			return
+		}
+
+		if writeErr := conn.WriteMessage(gws.OpcodeText, []byte(msg.Payload)); writeErr != nil {
+			global.LOG.Printf("Error writing message to user %s: %v\n", clientId, writeErr)
+			return
+		}
+	}
+}