Problems with Vaadin 18

[olijaun]

Hi

I'm completely new to Vaadin. This projects seems to be a good starting point for me because I will need oauth authentication for my project. It runs fine on my machine.

However if I try to change this to Vaadin 18 it doesn't work anymore. I'm using the vaadin generator to create a pom.xml for vaadin 18 and then I basically add the spring-boot-starter-oauth2-client dependency. I also had to change ServletHelper to HandlerHelper in SeucrityConfiguration. It compiles and it starts. However when I click on "Login with Google" there appears a page saying "Could not navigate to 'oauth2/authorization/google'". If I enter the url /oauth2/authorization/google into the browser manually and I hit enter (so basically performing a GET) it works and I'm logged in.

The reason for this seems to be that it tries to POST to the given URL. WIth vaadin 14 it does a GET.

So being new to Vaadin I don't know really what to do... It would be great if you could give me a hint or maybe even create a vaadin 18 version of this project.

Thanks a lot! Regards
Oliver

[rubenqba]

Same behavior happens on Vaadin 21.

[Charismara]

This can be fixed my adding gplusLoginButton.getElement().setAttribute("router-ignore", true); in the LoginScreen.class above add(gplusLoginButton);

[Avec112]

I posted a link to this issue on OpenStack and the solution @Charismara gave is confirmed to work.
https://stackoverflow.com/questions/70082575/vaadin-21-flow-spring-security-oauth2-couldnt-find-route-for-oauth2-authori/70131144#70131144