Example of streaming JSON objects in a HTTP response

handler.go

func (app *application) exampleHandler(w http.ResponseWriter, r *http.Request) {
    enc := jsontext.NewEncoder(w)
    rc := http.NewResponseController(w)

    w.Header().Set("Content-Type", "application/x-ndjson")

    for i := range 5 {
        data := map[string]int{
            "count": i,
        }

        err := json.MarshalEncode(enc, data, json.Deterministic(true))
        if err != nil {
            if i == 0 {
                http.Error(w, "The server encountered a problem and could not process your request", http.StatusInternalServerError)
            }
            app.logger.Error(err.Error())
            return
        }

        err = rc.Flush()
        if err != nil {
            app.logger.Error(err.Error())
            return
        }

        time.Sleep(time.Second)
    }
}