Golang如何使用websocket
package main import ("fmt"
"golang.org/x/net/websocket"
"html/template" //支持模板html
"log"
"net/http"
)
func Echo(ws *websocket.Conn) {
var err error
for {
var reply string
//websocket接受信息
if err = websocket.Message.Receive(ws, &reply); err != nil {
fmt.Println("receive failed:", err)
break
}
fmt.Println("reveived from client: " + reply)
msg := "received:" + reply
fmt.Println("send to client:" + msg)
//这里是发送消息
if err = websocket.Message.Send(ws, msg); err != nil {
fmt.Println("send failed:", err)
break
}
}
}
func web(w http.ResponseWriter, r *http.Request) {
//打印请求的方法
fmt.Println("method", r.Method)
if r.Method == "GET" { //如果请求方法为get显示login.html,并相应给前端
t, _ := template.ParseFiles("websocket.html")
t.Execute(w, nil)
} else {
//否则走打印输出post接受的参数username和password
fmt.Println(r.PostFormValue("username"))
fmt.Println(r.PostFormValue("password"))
}
}
func main() {
//接受websocket的路由地址
http.Handle("/websocket", websocket.Handler(Echo))
//html页面
http.HandleFunc("/web", web)
if err := http.ListenAndServe(":1234", nil); err != nil {
log.Fatal("ListenAndServe:", err)
}
}
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