func main() { var proxy *goproxy.ProxyHttpServer app.Main(func(a app.App) { var sz size.Event for e := range a.Events() { switch e := app.Filter(e).(type) { case lifecycle.Event: if e.Crosses(lifecycle.StageAlive) == lifecycle.CrossOn && proxy == nil { proxy = goproxy.NewProxyHttpServer() //proxy.Verbose = true re := regexp.MustCompile(`.*`) proxy.OnResponse(goproxy.UrlMatches(re)).DoFunc( func(res *http.Response, ctx *goproxy.ProxyCtx) *http.Response { if label != nil { label.Text = fmt.Sprintf("%s\n%s\n", ctx.Req.URL, label.Text) log.Println(ctx.Req.URL) } return res }) go func() { log.Fatal(http.ListenAndServe(":8888", proxy)) }() } case paint.Event: onPaint(sz) a.EndPaint(e) case size.Event: sz = e } } }) }