在Go语言中实现WebSocket的双向通信通常需要使用第三方库，其中 gorilla/websocket 是一个非常流行和广泛使用的库。
1、安装
go get github.com/gorilla/websocket2、编写WebSocket服务器代码
package mainimport ("fmt""github.com/gorilla/websocket""log""net/http"
)var upgrader = websocket.Upgrader{ReadBufferSize: 1024,WriteBufferSize: 1024,CheckOrigin: func(r *http.Request) bool {// 允许所有来源的WebSocket连接return true},
}func handleConnection(w http.ResponseWriter, r *http.Request) {// 升级HTTP连接为WebSocket连接conn, err := upgrader.Upgrade(w, r, nil)if err != nil {log.Println("升级到WebSocket连接时出错:", err)return}defer conn.Close()log.Println("客户端已连接")// 读取客户端发来消息for {messageType, p, err := conn.ReadMessage()if err != nil {log.Println("从客户端读取时出错:", err)return}// 处理消息log.Printf("这是客户端发来的信息:%s-------------消息类型%v", string(p), messageType)// 发送消息给客户端err = conn.WriteMessage(messageType, []byte("你好！我是server端。。。"))if err != nil {fmt.Println(err)return}}
}func main() {//创建一个HTTP服务器，当有请求过来时交给handleConnection处理http.HandleFunc("/ws", handleConnection)// 启动WebSocket服务器log.Println("WebSocket服务器正在侦听：8080")err := http.ListenAndServe(":8080", nil)if err != nil {log.Println("WebSocket服务器正在侦听出错", err)}
}3、编写WebSocket客户端代码
package mainimport ("github.com/gorilla/websocket""log""os""os/signal""time"
)func main() {interrupt := make(chan os.Signal, 1)signal.Notify(interrupt, os.Interrupt) //使用signal.Notify监听os.Interrupt信号（通常是Ctrl+C产生的中断信号）u := "ws://localhost:8080/ws"log.Printf("连接到服务器 %s", u)c, _, err := websocket.DefaultDialer.Dial(u, nil) //试连接到WebSocket服务器if err != nil {log.Fatal("失败:", err)}defer c.Close()done := make(chan struct{})go func() {defer close(done)//无限循环读取从WebSocket服务器发送的消息for {messageType, message, err := c.ReadMessage()if err != nil {log.Println("读取失败:", err)return}log.Printf("这是服务器端发来的信息: %s--------------消息类型:%v", message, messageType)}}()ticker := time.NewTicker(2 * time.Second) //创建一个定时器，每2秒触发一次defer ticker.Stop()for {select {case <-done:returncase <-ticker.C: //定时候定时触发//向WebSocket服务端发送消息//websocket.TextMessage指定消息类型为文本消息//t.String()将定时器的当前值转换为字符串，然后通过[]byte(t.String())转换为字节切片，作为消息的内容发送。err := c.WriteMessage(websocket.TextMessage, []byte("你好！我是client端。。。"))if err != nil {log.Println("向WebSocket服务端发送消息出错:", err)return}case <-interrupt:log.Println("接收到中断信号")// 关闭连接err := c.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""))if err != nil {log.Println("关闭输入:", err)return}select {case <-done:case <-time.After(time.Second):}return}}
} 
