How to use SSE Response with go-zero?

[JiehangXie]

My application requires SSE Response(text/event-stream), but I cannot find the documentation related to SSE. How should I use SSE to return with go-zero?Thanks.

[qianjiangchao1992]

me too

[kevwan]

Respond with HTTP header Content-Type: text/event-stream.

[JiehangXie]

Respond with HTTP header Content-Type: text/event-stream.

I have achieved it in handler function like:

    return func(w http.ResponseWriter, r *http.Request) {
        _, ok := w.(http.Flusher)
        w.Header().Set(`Content-Type`, `text/event-stream;charset=utf-8`)

and return streaming data with channel in golang.
But I think it is not the best way to achieve it.
Can go-zero provide other implementation methods making it simpler and more elegant?
Thanks a lot! @kevwan

[JiehangXie]

For example, Django in Python, it provides some response objects such as StreamingHttpResponse. It makes much elegant to achieve SSE. I hope go-zero can refer to similar programming.

[sdaduanbilei]

me too

[sdaduanbilei]

func LoginQrCodeHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		var req types.LoginQrCodeReq
		w.Header().Set(`Content-Type`, `text/event-stream;charset=utf-8`)
		if err := httpx.Parse(r, &req); err != nil {
			httpx.ErrorCtx(r.Context(), w, err)
			return
		}

		l := user.NewLoginQrCodeLogic(r.Context(), svcCtx, w)
		_, err := l.LoginQrCode(&req, w)
		if err != nil {
			xhttp.JsonBaseResponseCtx(r.Context(), w, err)
		} else {
			httpx.Ok(w)
		}
	

func (l *LoginQrCodeLogic) LoginQrCode(req *types.LoginQrCodeReq, w http.ResponseWriter) (resp string, err error) {
	// todo: add your logic here and delete this line
	fmt.Fprintf(w, "data: %s\n\n", fmt.Sprintf("Event %s", "3333"))
	w.(http.Flusher).Flush()
	return
}

The above code implements sse, but I need another interface. When sending data, I don't know how to call it

[JiehangXie]

这是自动回复邮件。   您好，您的邮件已到达我的邮箱，我将尽快查阅并回复，谢谢。Hello, I have reveived your email. But due to the time differences and my busy work, perhaps I will reply to you in 24 to 48 hours.