Google accounts authentication in a Vaadin app running in GAE

General
1

Hi,

I wrote a simple demonstration how to do Google accounts authentication in a
Vaadin application running in the Google App Engine
.

In Application.init() we do nothing except add a TransactionListener that will initialize the UI if needed and check the authentication status using the GAE-provided API. We defer the UI initialization to the request listener because the required HTTPServletRequest object is not yet available at Application.init().


Sources


Demo

Hopefully someone finds this useful.

2

Hi,
is there an updated code, e.g. for Vaadin 7?
since almost all the methods seem to be outdated… and as a newbie on Vaadin this is the only clean example I could actually find.

e.g. how do i get the request URI from the VaadinRequest context, to give it to Google UserService.createLoginURL() ?
the GAE example code from https://vaadin.com/book/vaadin7/-/page/intro.walkthrough.html is:

public class HelloWorld extends UI {
@Override
protected void init(VaadinRequest request) {

thanks a lot in advance.

3

Hi,

I don’t know if it’s the correct way but this line works for me in vaadin 7.

userService.createLoginURL(Page.getCurrent().toString());

I would like to see an updated tutorial about this subject.

Thanks in advance