如何在Go语言中使用WebSocket进行远程控制
简介:
WebSocket是一种在Web应用程序中实现实时双向通信的技术。在Go语言中,我们可以使用标准库中的net/http
和github.com/gorilla/websocket
包来实现WebSocket通信。本文将介绍如何使用WebSocket在Go语言中进行远程控制,并提供具体的代码示例。
步骤:
go get github.com/gorilla/websocket
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package main
import (
"log"
"net/http"
"github.com/gorilla/websocket"
)
var upgrader = websocket.Upgrader{}
func wsHandler(w http.ResponseWriter, r *http.Request) {
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
log.Fatal(err)
}
defer conn.Close()
for {
// 读取客户端消息
messageType, p, err := conn.ReadMessage()
if err != nil {
log.Println(err)
return
}
// 处理客户端消息
// doSomething(p)
// 响应客户端消息
err = conn.WriteMessage(messageType, p)
if err != nil {
log.Println(err)
return
}
}
}
func main() {
http.HandleFunc("/ws", wsHandler)
log.Fatal(http.ListenAndServe(":8080", nil))
}
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package main
import (
"log"
"net/url"
"os"
"os/signal"
"time"
"github.com/gorilla/websocket"
)
func main() {
interrupt := make(chan os.Signal, 1)
signal.Notify(interrupt, os.Interrupt)
u := url.URL{Scheme: "ws", Host: "localhost:8080", Path: "/ws"}
log.Printf("connecting to %s", u.String())
c, _, err := websocket.DefaultDialer.Dial(u.String(), nil)
if err != nil {
log.Fatal("dial:", err)
}
defer c.Close()
done := make(chan struct{})
// 启动读取协程
go func() {
defer c.Close()
defer close(done)
for {
_, message, err := c.ReadMessage()
if err != nil {
log.Println("read:", err)
return
}
// 处理服务器消息
// doSomething(message)
}
}()
// 启动写入协程
go func() {
defer c.Close()
defer close(done)
for {
// 写入消息到服务器
err := c.WriteMessage(websocket.TextMessage, []byte("Hello, Server!"))
if err != nil {
log.Println("write:", err)
return
}
time.Sleep(time.Second)
}
}()
// 等待中断信号,优雅地关闭连接
for {
select {
case