commit e73d1df1810a6157b0dfc3ef070a096213f139b9 Author: lq Date: Wed Jul 2 17:06:24 2025 +0800 初始化 diff --git a/.env b/.env new file mode 100644 index 0000000..23a439e --- /dev/null +++ b/.env @@ -0,0 +1,5 @@ +[Redis] +REDIS_ADDR=127.0.0.1:6379 + +[App] +PORT=12080 \ No newline at end of file diff --git a/.idea/.gitignore b/.idea/.gitignore new file mode 100644 index 0000000..35410ca --- /dev/null +++ b/.idea/.gitignore @@ -0,0 +1,8 @@ +# 默认忽略的文件 +/shelf/ +/workspace.xml +# 基于编辑器的 HTTP 客户端请求 +/httpRequests/ +# Datasource local storage ignored files +/dataSources/ +/dataSources.local.xml diff --git a/.idea/modules.xml b/.idea/modules.xml new file mode 100644 index 0000000..011ef23 --- /dev/null +++ b/.idea/modules.xml @@ -0,0 +1,8 @@ + + + + + + + + \ No newline at end of file diff --git a/.idea/websocket.iml b/.idea/websocket.iml new file mode 100644 index 0000000..5e764c4 --- /dev/null +++ b/.idea/websocket.iml @@ -0,0 +1,9 @@ + + + + + + + + + \ No newline at end of file diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..46d15ba --- /dev/null +++ b/go.mod @@ -0,0 +1,41 @@ +module xk-websocket + +go 1.24.4 + +require ( + github.com/gin-gonic/gin v1.10.1 + github.com/go-redis/redis/v8 v8.11.5 + github.com/google/uuid v1.6.0 + github.com/gorilla/websocket v1.5.3 +) + +require ( + github.com/bytedance/sonic v1.11.6 // indirect + github.com/bytedance/sonic/loader v0.1.1 // indirect + github.com/cespare/xxhash/v2 v2.1.2 // indirect + github.com/cloudwego/base64x v0.1.4 // indirect + github.com/cloudwego/iasm v0.2.0 // indirect + github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect + github.com/gabriel-vasile/mimetype v1.4.3 // indirect + github.com/gin-contrib/sse v0.1.0 // indirect + github.com/go-playground/locales v0.14.1 // indirect + github.com/go-playground/universal-translator v0.18.1 // indirect + github.com/go-playground/validator/v10 v10.20.0 // indirect + github.com/goccy/go-json v0.10.2 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/klauspost/cpuid/v2 v2.2.7 // indirect + github.com/leodido/go-urn v1.4.0 // indirect + github.com/mattn/go-isatty v0.0.20 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/pelletier/go-toml/v2 v2.2.2 // indirect + github.com/twitchyliquid64/golang-asm v0.15.1 // indirect + github.com/ugorji/go/codec v1.2.12 // indirect + golang.org/x/arch v0.8.0 // indirect + golang.org/x/crypto v0.23.0 // indirect + golang.org/x/net v0.25.0 // indirect + golang.org/x/sys v0.20.0 // indirect + golang.org/x/text v0.15.0 // indirect + google.golang.org/protobuf v1.34.1 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..0dc3728 --- /dev/null +++ b/go.sum @@ -0,0 +1,111 @@ +github.com/bytedance/sonic v1.11.6 h1:oUp34TzMlL+OY1OUWxHqsdkgC/Zfc85zGqw9siXjrc0= +github.com/bytedance/sonic v1.11.6/go.mod h1:LysEHSvpvDySVdC2f87zGWf6CIKJcAvqab1ZaiQtds4= +github.com/bytedance/sonic/loader v0.1.1 h1:c+e5Pt1k/cy5wMveRDyk2X4B9hF4g7an8N3zCYjJFNM= +github.com/bytedance/sonic/loader v0.1.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU= +github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cbYE= +github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= +github.com/cloudwego/base64x v0.1.4 h1:jwCgWpFanWmN8xoIUHa2rtzmkd5J2plF/dnLS6Xd/0Y= +github.com/cloudwego/base64x v0.1.4/go.mod h1:0zlkT4Wn5C6NdauXdJRhSKRlJvmclQ1hhJgA0rcu/8w= +github.com/cloudwego/iasm v0.2.0 h1:1KNIy1I1H9hNNFEEH3DVnI4UujN+1zjpuk6gwHLTssg= +github.com/cloudwego/iasm v0.2.0/go.mod h1:8rXZaNYT2n95jn+zTI1sDr+IgcD2GVs0nlbbQPiEFhY= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78= +github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc= +github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4= +github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ= +github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0= +github.com/gabriel-vasile/mimetype v1.4.3/go.mod h1:d8uq/6HKRL6CGdk+aubisF/M5GcPfT7nKyLpA0lbSSk= +github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE= +github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI= +github.com/gin-gonic/gin v1.10.1 h1:T0ujvqyCSqRopADpgPgiTT63DUQVSfojyME59Ei63pQ= +github.com/gin-gonic/gin v1.10.1/go.mod h1:4PMNQiOhvDRa013RKVbsiNwoyezlm2rm0uX/T7kzp5Y= +github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s= +github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4= +github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA= +github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY= +github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY= +github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY= +github.com/go-playground/validator/v10 v10.20.0 h1:K9ISHbSaI0lyB2eWMPJo+kOS/FBExVwjEviJTixqxL8= +github.com/go-playground/validator/v10 v10.20.0/go.mod h1:dbuPbCMFw/DrkbEynArYaCwl3amGuJotoKCe95atGMM= +github.com/go-redis/redis/v8 v8.11.5 h1:AcZZR7igkdvfVmQTPnu9WE37LRrO/YrBH5zWyjDC0oI= +github.com/go-redis/redis/v8 v8.11.5/go.mod 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h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50= +rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4= diff --git a/main.go b/main.go new file mode 100644 index 0000000..787b8ce --- /dev/null +++ b/main.go @@ -0,0 +1,677 @@ +package main + +import ( + "context" + "encoding/json" + "fmt" + "log" + "net/http" + "os" + "sync" + "time" + + "github.com/gin-gonic/gin" + "github.com/go-redis/redis/v8" + "github.com/google/uuid" + "github.com/gorilla/websocket" +) + +// WebSocket 升级器配置 +var upgrader = websocket.Upgrader{ + ReadBufferSize: 1024, + WriteBufferSize: 1024, + CheckOrigin: func(r *http.Request) bool { + return true // 允许跨域 + }, +} + +// 统一消息结构（发送方使用） +type SendMessagePayload struct { + RequestType string `json:"request_type"` // 消息类型 + TargetClientID string `json:"target_client_id"` // 目标客户端ID + SenderUserID string `json:"sender_user_id"` // 发送者用户ID + ReceiverUserID string `json:"receiver_user_id"` // 接收者用户ID + MessageType int `json:"message_type"` // 消息类型（0-6） + MessageContent string `json:"message_content"` // 消息内容 +} + +// 通过用户ID发送消息的结构 +type SendToUserPayload struct { + SenderUserID string `json:"sender_user_id"` // 发送者用户ID + ReceiverUserID string `json:"receiver_user_id"` // 接收者用户ID + MessageType int `json:"message_type"` // 消息类型（0-6） + MessageContent string `json:"message_content"` // 消息内容 +} + +// 客户端接收消息结构（最终格式） +type ClientReceivedMessage struct { + SenderID string `json:"sender_id"` // 发送者连接ID + ReceiverID string `json:"receiver_id"` // 接收者连接ID + SenderUserID string `json:"sender_user_id"` // 发送者用户ID + ReceiverUserID string `json:"receiver_user_id"` // 接收者用户ID + MessageType int `json:"message_type"` // 消息类型（0-6） + Content string `json:"content"` // 消息内容 + SendTime string `json:"send_time"` // 发送时间 +} + +// Redis 消息结构 +type RedisMessage struct { + SenderNodeID string `json:"sender_node_id"` // 发送节点ID + ClientID string `json:"client_id"` // 目标客户端ID + Message string `json:"message"` // 消息内容 +} + +// 用户绑定请求结构 +type BindRequest struct { + UserID string `json:"user_id"` // 用户ID + ClientID string `json:"client_id"` // 客户端ID +} + +// 全局变量 +var ( + clients = make(map[string]*websocket.Conn) // 客户端连接映射 + clientsMux sync.RWMutex // 连接映射的读写锁 + redisCtx = context.Background() // Redis 上下文 + nodeID string // 当前节点ID + redisCli *redis.Client // Redis 客户端 + port string // 服务端口 +) + +// Redis键常量 +const ( + ClientUserKey = "client_user_mapping" // clientid -> userid映射 + UserClientKey = "user_client_mapping" // userid -> clientid列表 +) + +func main() { + // 配置系统 + configureSystem() + + // 初始化Redis客户端 + initRedisClient() + + // 创建Gin路由器 + router := gin.Default() + router.Use(gin.Recovery()) // 添加恢复中间件 + + // 注册路由 + router.GET("/ws", handleWebSocket) // WebSocket连接端点 + router.POST("/send", sendMessageHandler) // 消息发送端点（通过客户端ID） + router.POST("/bind", bindHandler) // 用户绑定端点 + router.POST("/send-to-user", sendToUserHandler) // 新增：通过用户ID发送消息 + router.GET("/health", healthHandler) // 健康检查端点 + + // 输出启动信息 + printStartupInfo() + + // 启动Redis消息订阅 + go subscribeToRedis() + + // 启动HTTP服务 + runServer(router) +} + +// 配置系统环境 +func configureSystem() { + nodeID = getEnv("NODE_ID", "local") // 获取节点ID，默认"local" + port = getEnv("PORT", "12080") // 获取端口，默认12080 + log.SetPrefix(fmt.Sprintf("[Node:%s] ", nodeID)) // 设置日志前缀 + log.SetFlags(log.LstdFlags | log.Lmicroseconds) // 设置日志格式 +} + +// 初始化Redis客户端 +func initRedisClient() { + redisAddr := getEnv("REDIS_ADDR", "localhost:6379") + redisPassword := getEnv("REDIS_PASSWORD", "") // Redis密码 + redisCli = redis.NewClient(&redis.Options{ + Addr: redisAddr, // Redis地址 + Password: redisPassword, // Redis密码 + DB: 0, // 默认DB + }) + + // 测试Redis连接 + if err := checkRedisConnection(); err != nil { + log.Fatalf("❌ Redis连接失败: %v", err) + } +} + +// 检查Redis连接 +func checkRedisConnection() error { + _, err := redisCli.Ping(redisCtx).Result() + return err +} + +// 输出启动信息 +func printStartupInfo() { + hostname, _ := os.Hostname() + log.Printf("🚀 WebSocket服务启动: NodeID=%s", nodeID) + log.Printf("🌐 监听端口: %s", port) + log.Printf("📡 Redis地址: %s", getEnv("REDIS_ADDR", "localhost:6379")) + log.Printf("💻 主机: %s", hostname) + log.Printf("🕒 启动时间: %s", time.Now().Format("2006-01-02 15:04:05")) + log.Printf("🔔 支持消息类型: 0:文本 1:图片 2:音频 3:视频 4:处方 5:病例 6:视频通话") + log.Printf("🔑 用户绑定键: %s, %s", ClientUserKey, UserClientKey) + log.Printf("📬 新增接口: POST /send-to-user (直接通过用户ID发送消息)") + log.Println("🔗 等待客户端连接...") +} + +// 启动服务 +func runServer(router *gin.Engine) { + addr := "127.0.0.1:" + port + log.Printf("🔌 服务地址: http://%s", addr) + log.Printf("🔌 WebSocket连接地址: ws://%s/ws", addr) + + if err := router.Run(addr); err != nil { + log.Fatalf("❌ 服务启动失败: %v", err) + } +} + +// 健康检查处理 +func healthHandler(c *gin.Context) { + c.JSON(http.StatusOK, gin.H{ + "status": "ok", + "node": nodeID, + "time": time.Now().Format(time.RFC3339), + }) +} + +// WebSocket处理函数 +func handleWebSocket(c *gin.Context) { + start := time.Now() + clientIP := c.ClientIP() + + log.Printf("👤 客户端连接中: IP=%s", clientIP) + + // 升级为WebSocket连接 + conn, err := upgrader.Upgrade(c.Writer, c.Request, nil) + if err != nil { + log.Printf("⚠️ WebSocket升级失败: %v | ClientIP=%s", err, clientIP) + c.JSON(http.StatusBadRequest, gin.H{"error": "无法升级为WebSocket连接"}) + return + } + + defer conn.Close() + + // 生成客户端ID + clientID := generateClientID() + log.Printf("✅ 客户端已连接: ClientID=%s | IP=%s | Duration=%s", + clientID, clientIP, time.Since(start)) + + // 将连接添加到客户端映射 + addClient(clientID, conn) + defer removeClient(clientID) + + // 发送客户端ID + if err := conn.WriteJSON(gin.H{"clientId": clientID}); err != nil { + log.Printf("⚠️ 发送客户端ID失败: %v | ClientID=%s", err, clientID) + return + } + + // 设置心跳 + conn.SetPongHandler(func(string) error { + conn.SetReadDeadline(time.Now().Add(60 * time.Second)) + return nil + }) + + // 保持连接活跃 + for { + messageType, message, err := conn.ReadMessage() + if err != nil { + if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway) { + log.Printf("❌ 连接意外断开: %v | ClientID=%s", err, clientID) + } else { + log.Printf("⚠️ 连接正常关闭: ClientID=%s", clientID) + } + break + } + + // 只处理文本消息 + if messageType == websocket.TextMessage { + go handleClientMessage(clientID, message) + } + } +} + +// 处理客户端消息 +func handleClientMessage(senderID string, message []byte) { + log.Printf("📥 收到客户端消息: SenderID=%s | Size=%d bytes", senderID, len(message)) + + // 尝试解析为发送消息请求 + var payload SendMessagePayload + if err := json.Unmarshal(message, &payload); err == nil && payload.RequestType != "" { + log.Printf("📦 解析JSON消息成功: Type=%s", payload.RequestType) + + // 处理绑定请求 + if payload.RequestType == "bind" && payload.SenderUserID != "" { + log.Printf("🔗 处理绑定请求: ClientID=%s -> UserID=%s", senderID, payload.SenderUserID) + if err := bindClientToUser(senderID, payload.SenderUserID); err != nil { + log.Printf("❌ 绑定失败: %v", err) + } else { + log.Printf("✅ 绑定成功: ClientID=%s -> UserID=%s", senderID, payload.SenderUserID) + } + return + } + + // 处理发送消息请求 + if payload.RequestType == "send_message" { + // 如果指定了目标clientid，则直接发送 + if payload.TargetClientID != "" { + log.Printf("📨 处理客户端发起的发送请求: TargetID=%s | MsgType=%d", + payload.TargetClientID, payload.MessageType) + + // 构建客户端消息结构 + clientMsg := ClientReceivedMessage{ + SenderID: senderID, + ReceiverID: payload.TargetClientID, + SenderUserID: payload.SenderUserID, + ReceiverUserID: payload.ReceiverUserID, + MessageType: payload.MessageType, + Content: payload.MessageContent, + SendTime: time.Now().Format(time.RFC3339), + } + + // 发送消息 + sendMessageToClient(payload.TargetClientID, clientMsg) + return + } + + // 如果指定了接收用户ID，则通过用户ID发送 + if payload.ReceiverUserID != "" { + log.Printf("📨 处理客户端发起的用户发送请求: ReceiverUserID=%s | MsgType=%d", + payload.ReceiverUserID, payload.MessageType) + + // 构建客户端消息结构 + clientMsg := ClientReceivedMessage{ + SenderID: senderID, + ReceiverID: "", // 通过userID发送，留空 + SenderUserID: payload.SenderUserID, + ReceiverUserID: payload.ReceiverUserID, + MessageType: payload.MessageType, + Content: payload.MessageContent, + SendTime: time.Now().Format(time.RFC3339), + } + + // 通过用户ID发送消息 + sendMessageToUser(payload.ReceiverUserID, clientMsg) + return + } + } + } + + // 尝试解析为已封装的消息结构 + var clientMsg ClientReceivedMessage + if err := json.Unmarshal(message, &clientMsg); err == nil && clientMsg.ReceiverID != "" { + log.Printf("📨 处理客户端封装消息: TargetID=%s | MsgType=%d", + clientMsg.ReceiverID, clientMsg.MessageType) + + // 设置发送者ID（避免客户端冒充） + clientMsg.SenderID = senderID + + // 发送消息 + sendMessageToClient(clientMsg.ReceiverID, clientMsg) + return + } + + // 无法识别的消息格式 + log.Printf("⚠️ 无法识别的消息格式: Size=%d bytes | Message=%s", len(message), string(message)) +} + +// 消息发送处理（HTTP API）- 通过客户端ID发送 +func sendMessageHandler(c *gin.Context) { + start := time.Now() + + var payload SendMessagePayload + if err := c.ShouldBindJSON(&payload); err != nil { + log.Printf("⚠️ 无效的JSON请求格式: %v", err) + c.JSON(http.StatusBadRequest, gin.H{"error": "无效的JSON格式"}) + return + } + + if payload.RequestType == "" || (payload.TargetClientID == "" && payload.ReceiverUserID == "") || + payload.SenderUserID == "" || payload.ReceiverUserID == "" { + log.Printf("⚠️ 缺少必要参数: request_type=%s target_client_id=%s receiver_user_id=%s sender_user_id=%s receiver_user_id=%s", + payload.RequestType, payload.TargetClientID, payload.ReceiverUserID, payload.SenderUserID, payload.ReceiverUserID) + c.JSON(http.StatusBadRequest, gin.H{"error": "缺少必要参数"}) + return + } + + // 只处理发送消息请求 + if payload.RequestType == "send_message" { + log.Printf("📤 处理API发送请求: SenderUser=%s | MsgType=%d", + payload.SenderUserID, payload.MessageType) + + // 构建客户端消息结构 + clientMsg := ClientReceivedMessage{ + SenderID: "system", // API消息标记为系统发送 + ReceiverID: payload.TargetClientID, + SenderUserID: payload.SenderUserID, + ReceiverUserID: payload.ReceiverUserID, + MessageType: payload.MessageType, + Content: payload.MessageContent, + SendTime: time.Now().Format(time.RFC3339), + } + + var result string + var sendErr error + + // 根据目标类型发送 + if payload.TargetClientID != "" { + log.Printf("🎯 目标类型: ClientID | Target=%s", payload.TargetClientID) + sendErr = sendMessageToClient(payload.TargetClientID, clientMsg) + result = fmt.Sprintf("消息已发送到ClientID: %s", payload.TargetClientID) + } else if payload.ReceiverUserID != "" { + log.Printf("🎯 目标类型: UserID | ReceiverUser=%s", payload.ReceiverUserID) + sendErr = sendMessageToUser(payload.ReceiverUserID, clientMsg) + result = fmt.Sprintf("消息已发送到UserID: %s", payload.ReceiverUserID) + } else { + c.JSON(http.StatusBadRequest, gin.H{"error": "必须指定目标客户端ID或用户ID"}) + return + } + + if sendErr != nil { + c.JSON(http.StatusInternalServerError, gin.H{"error": sendErr.Error()}) + return + } + + c.JSON(http.StatusOK, gin.H{"status": "success", "message": result}) + log.Printf("✅ API请求完成: Duration=%s", time.Since(start)) + return + } + + c.JSON(http.StatusBadRequest, gin.H{"error": "不支持的request_type"}) +} + +// 用户绑定处理 +func bindHandler(c *gin.Context) { + start := time.Now() + + var req BindRequest + if err := c.ShouldBindJSON(&req); err != nil { + log.Printf("⚠️ 无效的绑定请求格式: %v", err) + c.JSON(http.StatusBadRequest, gin.H{"error": "无效的JSON格式"}) + return + } + + if req.UserID == "" || req.ClientID == "" { + log.Printf("⚠️ 缺少必要参数: user_id=%s client_id=%s", req.UserID, req.ClientID) + c.JSON(http.StatusBadRequest, gin.H{"error": "user_id和client_id不能为空"}) + return + } + + log.Printf("🔗 处理用户绑定请求: UserID=%s ClientID=%s", req.UserID, req.ClientID) + + // 执行绑定 + if err := bindClientToUser(req.ClientID, req.UserID); err != nil { + log.Printf("❌ 绑定失败: %v", err) + c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()}) + return + } + + c.JSON(http.StatusOK, gin.H{ + "status": "success", + "message": fmt.Sprintf("绑定成功: ClientID %s -> UserID %s", req.ClientID, req.UserID), + }) + + log.Printf("✅ 绑定请求完成: UserID=%s ClientID=%s | Duration=%s", + req.UserID, req.ClientID, time.Since(start)) +} + +// 通过用户ID发送消息处理（新增独立接口） +func sendToUserHandler(c *gin.Context) { + start := time.Now() + + var payload SendToUserPayload + if err := c.ShouldBindJSON(&payload); err != nil { + log.Printf("⚠️ 无效的JSON请求格式: %v", err) + c.JSON(http.StatusBadRequest, gin.H{"error": "无效的JSON格式"}) + return + } + + if payload.ReceiverUserID == "" || payload.SenderUserID == "" { + log.Printf("⚠️ 缺少必要参数: receiver_user_id=%s sender_user_id=%s", + payload.ReceiverUserID, payload.SenderUserID) + c.JSON(http.StatusBadRequest, gin.H{"error": "缺少接收方或发送方用户ID"}) + return + } + + log.Printf("📤 处理API用户发送请求: SenderUser=%s → ReceiverUser=%s | MsgType=%d", + payload.SenderUserID, payload.ReceiverUserID, payload.MessageType) + + // 构建客户端消息结构 + clientMsg := ClientReceivedMessage{ + SenderID: "system", // 标记为系统发送 + ReceiverID: "", // 留空，通过用户ID发送 + SenderUserID: payload.SenderUserID, + ReceiverUserID: payload.ReceiverUserID, + MessageType: payload.MessageType, + Content: payload.MessageContent, + SendTime: time.Now().Format(time.RFC3339), + } + + if err := sendMessageToUser(payload.ReceiverUserID, clientMsg); err != nil { + c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()}) + return + } + + c.JSON(http.StatusOK, gin.H{ + "code": 0, + "status": "success", + "message": fmt.Sprintf("消息已发送至用户 %s", payload.ReceiverUserID), + }) + + log.Printf("✅ API请求完成: Duration=%s", time.Since(start)) +} + +// 绑定客户端与用户 +func bindClientToUser(clientID, userID string) error { + // 存储 clientid -> userid 映射 + if err := redisCli.HSet(redisCtx, ClientUserKey, clientID, userID).Err(); err != nil { + return fmt.Errorf("保存client-user映射失败: %w", err) + } + + // 存储 userid -> clientid 映射（使用集合存储用户所有在线的clientID） + userClientKey := fmt.Sprintf("%s:%s", UserClientKey, userID) + if err := redisCli.SAdd(redisCtx, userClientKey, clientID).Err(); err != nil { + return fmt.Errorf("保存user-client映射失败: %w", err) + } + + // 设置过期时间（防止无效数据堆积） + expiration := 24 * time.Hour + if err := redisCli.Expire(redisCtx, userClientKey, expiration).Err(); err != nil { + log.Printf("⚠️ 设置过期时间失败: %v", err) + } + + log.Printf("🔗 用户绑定成功: ClientID=%s → UserID=%s", clientID, userID) + return nil +} + +// 通过用户ID发送消息 +func sendMessageToUser(userID string, msg ClientReceivedMessage) error { + start := time.Now() + log.Printf("👤 通过用户ID发送消息: UserID=%s", userID) + + // 获取用户关联的所有clientID + userClientKey := fmt.Sprintf("%s:%s", UserClientKey, userID) + clientIDs, err := redisCli.SMembers(redisCtx, userClientKey).Result() + if err != nil { + return fmt.Errorf("获取用户clientID失败: %w", err) + } + + if len(clientIDs) == 0 { + return fmt.Errorf("用户未绑定任何客户端") + } + + log.Printf("📡 找到 %d 个关联的客户端: UserID=%s", len(clientIDs), userID) + + var successCount, failCount int + var lastError error + + for _, clientID := range clientIDs { + // 创建消息副本并设置目标clientID + targetMsg := msg + targetMsg.ReceiverID = clientID + + if err := sendMessageToClient(clientID, targetMsg); err != nil { + log.Printf("❌ 发送消息到客户端失败: ClientID=%s | %v", clientID, err) + failCount++ + lastError = err + } else { + successCount++ + } + } + + log.Printf("📬 消息发送完成: 成功 %d, 失败 %d | UserID=%s | Duration=%s", + successCount, failCount, userID, time.Since(start)) + + if failCount > 0 { + return fmt.Errorf("部分消息发送失败，最后错误: %w", lastError) + } + return nil +} + +// 发送消息给客户端（核心函数） +func sendMessageToClient(clientID string, msg ClientReceivedMessage) error { + start := time.Now() + + // 序列化客户端消息 + msgJSON, err := json.Marshal(msg) + if err != nil { + log.Printf("❌ 消息序列化失败: %v", err) + return fmt.Errorf("内部错误") + } + + // 检查目标客户端是否在当前节点 + if conn := getClient(clientID); conn != nil { + log.Printf("📤 向本地客户端发送消息: ClientID=%s | MsgType=%d | Size=%d bytes", + clientID, msg.MessageType, len(msgJSON)) + + if err := conn.WriteMessage(websocket.TextMessage, msgJSON); err != nil { + log.Printf("❌ 发送消息失败: %v | ClientID=%s", err, clientID) + removeClient(clientID) // 移除失效连接 + return fmt.Errorf("发送消息失败") + } + + log.Printf("✅ 消息成功发送到本地客户端: ClientID=%s | Duration=%s", + clientID, time.Since(start)) + return nil + } + + // 如果目标客户端不在当前节点，则通过Redis转发 + log.Printf("🌐 向远程节点转发消息: ClientID=%s", clientID) + + redisMsg := RedisMessage{ + SenderNodeID: nodeID, + ClientID: clientID, + Message: string(msgJSON), // 原始JSON字符串 + } + + redisMsgJSON, err := json.Marshal(redisMsg) + if err != nil { + log.Printf("❌ Redis消息序列化失败: %v", err) + return fmt.Errorf("内部错误") + } + + // 发布到Redis的ws_messages频道 + if err := redisCli.Publish(redisCtx, "ws_messages", redisMsgJSON).Err(); err != nil { + log.Printf("❌ 发布消息到Redis失败: %v", err) + return fmt.Errorf("无法转发消息") + } + + log.Printf("📡 消息已转发到Redis: ClientID=%s | Size=%d bytes | Duration=%s", + clientID, len(redisMsgJSON), time.Since(start)) + return nil +} + +// 订阅Redis消息 +func subscribeToRedis() { + pubsub := redisCli.Subscribe(redisCtx, "ws_messages") + defer pubsub.Close() + + ch := pubsub.Channel() + + log.Println("🔔 开始监听Redis消息...") + + for msg := range ch { + start := time.Now() + var redisMsg RedisMessage + + // 解析Redis消息 + if err := json.Unmarshal([]byte(msg.Payload), &redisMsg); err != nil { + log.Printf("❌ 解析Redis消息失败: %v", err) + continue + } + + log.Printf("📥 收到Redis消息: Sender=%s | ClientID=%s | Size=%d bytes", + redisMsg.SenderNodeID, redisMsg.ClientID, len(msg.Payload)) + + // 如果是本地节点发送的消息，忽略 + if redisMsg.SenderNodeID == nodeID { + log.Println("ℹ️ 忽略本节点转发的消息") + continue + } + + // 发送给本地客户端 + if conn := getClient(redisMsg.ClientID); conn != nil { + // 直接使用Redis中的原始消息字符串 + if err := conn.WriteMessage(websocket.TextMessage, []byte(redisMsg.Message)); err != nil { + log.Printf("❌ 处理Redis消息失败: %v | ClientID=%s", err, redisMsg.ClientID) + removeClient(redisMsg.ClientID) + continue + } + + log.Printf("✅ Redis消息已处理: ClientID=%s | Duration=%s", + redisMsg.ClientID, time.Since(start)) + } else { + log.Printf("⚠️ 目标客户端不在本节点: ClientID=%s", redisMsg.ClientID) + } + } +} + +// 生成客户端ID (格式: <节点ID>-) +func generateClientID() string { + return fmt.Sprintf("%s-%s", nodeID, uuid.New().String()) +} + +// 添加客户端到映射 +func addClient(clientID string, conn *websocket.Conn) { + clientsMux.Lock() + defer clientsMux.Unlock() + clients[clientID] = conn + log.Printf("📌 添加客户端到连接池: ClientID=%s | 当前连接数=%d", + clientID, len(clients)) +} + +// 从映射中移除客户端 +func removeClient(clientID string) { + clientsMux.Lock() + defer clientsMux.Unlock() + + if _, exists := clients[clientID]; !exists { + return + } + + delete(clients, clientID) + log.Printf("🗑️ 从连接池移除客户端: ClientID=%s | 当前连接数=%d", + clientID, len(clients)) + + // 从Redis中移除clientid的绑定信息 + // 注意：这里只移除clientid->userid映射，userid->clientid映射在过期时会自动清理 + if err := redisCli.HDel(redisCtx, ClientUserKey, clientID).Err(); err != nil { + log.Printf("⚠️ 删除client_user_mapping失败: %v", err) + } +} + +// 获取客户端连接 +func getClient(clientID string) *websocket.Conn { + clientsMux.RLock() + defer clientsMux.RUnlock() + return clients[clientID] +} + +// 获取环境变量值，如果不存在则使用默认值 +func getEnv(key, defaultValue string) string { + if value := os.Getenv(key); value != "" { + return value + } + return defaultValue +}