func TestEngine(t *testing.T) {
    engine, err := NewEngine()
    if err != nil {
       panic(err)
    }
    resp, err := http.Get("http://127.0.0.1:8080/")
    if err != nil {
       return
    }
    content := httputils.ReadRaw(resp)
    frames, err := engine.DetectContent(content)
    if err != nil {
        return
    }
    fmt.Println(frames.String())
}