socket.io 相关：Example: A simple chat server（官方 实例）

package main
import (
    "http"
    "log"
    "socketio"
)
func main() {
    sio := socketio.NewSocketIO(nil)
    sio.OnConnect(func(c *socketio.Conn) {
        sio.Broadcast(struct{ announcement string }{"connected: " + c.String()})
    })
    sio.OnDisconnect(func(c *socketio.Conn) {
        sio.BroadcastExcept(c,
            struct{ announcement string }{"disconnected: " + c.String()})
    })
    sio.OnMessage(func(c *socketio.Conn, msg socketio.Message) {
        sio.BroadcastExcept(c,
            struct{ message []string }{[]string{c.String(), msg.Data()}})
    })
    mux := sio.ServeMux()
    mux.Handle("/", http.FileServer("www/", "/"))
    if err := http.ListenAndServe(":8080", mux); err != nil {
        log.Fatal("ListenAndServe:", err)
    }
}