2019-04-18 17:19
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Is it possible to write a Websocket client in wasm over go? I have tried using gorilla/websocket, but no success:

func main() {
    ws := func(this js.Value, inputs []js.Value) interface{} {
        go func() {
            wsDial, r, err := websocket.DefaultDialer.Dial("ws://localhost:3000/ws", nil)
            fmt.Println(wsDial, r, err)
        return nil

    js.Global().Set("ws", js.FuncOf(ws))

    select {}

I get the following error when calling ws():

dial tcp: Protocol not available

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是否可以在wasm over上编写Websocket客户端? 我尝试使用 gorilla / websocket ,但没有成功:

  func main(){
 ws:= func(this js.Value, 输入[] js.Value)接口{} {
 go func(){
 wsDial,r,err:= websocket.DefaultDialer.Dial(“ ws:// localhost:3000 / ws”,nil)
 fmt  .Println(wsDial,r,err)
 js.Global()。Set(“ ws”,js.FuncOf(ws))
选择{  } 

调用 ws()时收到以下错误:

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2条回答 默认 最新

  • duanbushi1867 2019-04-22 09:34

    I have solved it by retrieving the WebSocket object from the global JavaScript object, which in my case is window because I am running this in a browser. I have used only the "syscall/js" library. It looks like this:

    ws := js.Global().Get("WebSocket").New("ws://localhost:8080/ws")
    ws.Call("addEventListener", "open", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
        ws.Call("send", js.TypedArrayOf([]byte{123}))
        return nil
    解决 无用
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