Suggestion:Example for how to do a POST manually

[mackaybe]

func getJWT(samlUrl string, samlResp string) (jwt JWT, err error) {
	err = playwright.Install()
	if err != nil {
		log.Fatalf("Could not install playwright deps: %v", err)
	}
	pw, err := playwright.Run()
	if err != nil {
		log.Fatal(err)
	}
	defer pw.Stop()
	browser, err := pw.Chromium.Launch()
	if err != nil {
		log.Fatalf("Could not launch browser: %v\n", err)
	}
	page, err := browser.NewPage()
	if err != nil {
		log.Fatalf("Could not create page: %v\n", err)
	}
	defer browser.Close()
	headers := make(map[string]string)
	headers["origin"] = "https://portal.example.com"
	headers["referer"] = "https://portal.example.com/"
	headers["Content-Type"] = "application/x-www-form-urlencoded"
	formData := url.Values{}
	formData.Add("RelayState", "/portal")
	formData.Add("SAMLResponse", samlResp)
	handler := func(route playwright.Route, request playwright.Request) {
		if request.Method() == "GET" {
			postMethod := "POST"
			route.Continue(playwright.RouteContinueOptions{
				Headers:  headers,
				Method:   &postMethod,
				PostData: []byte(formData.Encode()),
			})
		} else {
			// If the request is not a POST request, abort it
			if err := route.Abort(); err != nil {
				log.Fatalf("Failed to abort the request: %v", err)
			}
		}
	}
	err = page.Route(samlUrl, handler)
	if _, err = page.Goto(samlUrl); err != nil {
		log.Fatalf("Could not goto callback URL: %v\n", err)
	}
	parsedUrl, err := url.Parse(samlUrl)
	if err != nil {
		log.Fatalf("Could not parse saml url: %v\n", err)
	}
	appOrigin := parsedUrl.Scheme + "://" + parsedUrl.Host
	storage, err := page.Context().StorageState()
	if err != nil {
		log.Fatalf("Could not retrieve localStorage from browser: %v\n", err)
	}
	var tokenString string
	for _, aurigin := range storage.Origins {
		if aurigin.Origin == appOrigin {
			for _, entry := range aurigin.LocalStorage {
				if entry.Name == "access_token" {
					tokenString = entry.Value
				}
			}
		}
	}
	json.Unmarshal([]byte(tokenString), &jwt)
	return jwt, nil
}