通過拆分多幀的方式WebSocket發送圖片

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package mainimport ("fmt""golang.org/x/net/websocket""log""net/http""os""time")var (dirPath stringtest    bytelenFile int)func check(e error) {if e != nil {    panic(e)}}func ChatServer(ws *websocket.Conn) {   defer ws.Close()var test []bytevar payload []bytefor {    err := websocket.Message.Receive(ws, &payload)    if err != nil {        log.Println(err)    }    fmt.Println("Payload: ", len(payload))    test = append(test, payload...)    fmt.Println("Test: ", len(test))    fo, err := os.Create(fmt.Sprintf("./%d.png", time.Now().UnixNano()))    check(err)    _, err = fo.Write(test)    check(err)    fo.Close()} log.Print("DONE")}func main() {if len(os.Args) < 2 {    log.Fatal("Usage: chatExample <dir>")}dirPath = os.Args[1]fmt.Println("Starting... ")http.Handle("/", http.FileServer(http.Dir(dirPath)))http.Handle("/ws", websocket.Handler(ChatServer))err := http.ListenAndServe(":3000", nil)if err != nil {    log.Fatal("ListenAndServe ", err)}}