96 lines
2.4 KiB
Go
96 lines
2.4 KiB
Go
// Package websocket 提供WebSocket HTTP升级处理器
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package websocket
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import (
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"log"
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"net/http"
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"github.com/gin-gonic/gin"
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"github.com/gorilla/websocket"
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)
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// upgrader 用于将HTTP连接升级为WebSocket连接
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var upgrader = websocket.Upgrader{
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ReadBufferSize: 1024, // 读缓冲区大小
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WriteBufferSize: 1024, // 写缓冲区大小
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// 允许所有来源的连接（开发环境）
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CheckOrigin: func(r *http.Request) bool {
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return true
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},
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}
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// HandleWebSocket 处理WebSocket连接升级请求（Gin版本）
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// 客户端通过此接口建立WebSocket连接，加入Hub进行消息通信
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// 路径: GET /api/ws
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func HandleWebSocket(hub *Hub) gin.HandlerFunc {
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return func(c *gin.Context) {
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handleWS(hub, c.Writer, c.Request)
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}
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}
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// HandleWebSocketHTTP 处理WebSocket连接升级请求（标准net/http版本）
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// 用于独立的WebSocket服务（端口16703）
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func HandleWebSocketHTTP(hub *Hub) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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handleWS(hub, w, r)
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}
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}
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// handleWS WebSocket连接处理的核心逻辑
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func handleWS(hub *Hub, w http.ResponseWriter, r *http.Request) {
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// 将HTTP连接升级为WebSocket连接
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conn, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Printf("WebSocket升级失败: %v", err)
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return
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}
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// 创建客户端实例并注册到Hub
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client := &Client{
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hub: hub,
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conn: conn,
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send: make(chan []byte, 256),
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}
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hub.register <- client
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// 启动读写goroutine
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go client.writePump()
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go client.readPump()
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}
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// readPump 从WebSocket连接读取消息
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// 持续监听客户端发送的消息，遇到错误或关闭时断开连接
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func (c *Client) readPump() {
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defer func() {
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c.hub.unregister <- c
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c.conn.Close()
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}()
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for {
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// 读取消息（目前仅用于检测连接状态，后续可扩展协作协议）
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_, message, err := c.conn.ReadMessage()
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if err != nil {
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if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseNormalClosure) {
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log.Printf("WebSocket读取错误: %v", err)
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}
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break
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}
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// 收到客户端消息后广播给其他客户端（协作基础）
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c.hub.BroadcastMessage(message)
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}
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}
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// writePump 向WebSocket连接写入消息
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// 从send通道读取消息并发送给客户端
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func (c *Client) writePump() {
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defer c.conn.Close()
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for message := range c.send {
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err := c.conn.WriteMessage(websocket.TextMessage, message)
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if err != nil {
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log.Printf("WebSocket写入错误: %v", err)
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break
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}
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}
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}
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