spring-boot-oauth2 | Spring Boot Oauth2 with H2 database | OAuth library

I am following https://spring.io/guides/tutorials/spring-boot-oauth2/ and reference to source code is https://github.com/spring-guides/tut-spring-boot-oauth2/tree/main/click. But you don't need to understand the full code. I have one basic question.

Basically whenever I am loading the page the callback method in $.get("/user", function(data) { is not always hitting.

What does the $.get("/user") - refers to. Isn't it mean hitting the /user endpoint provided by the Spring-boot-app. And the breakpoint in java (end-point user) and javascript (callback) method [which is making the authenticated class div to be visible and hide unauthenticated] are not always hitting - they only hit once the authentication is successful.

Question

Why the breakpoints in Java and Javascript are not always hitting? it's only hitting when the app is successfully authenticated with github. But I'm thinking its something to do with the basics of - jquery, html and javascript rather than related to oauth2 flow here.

Can you please let me know the details? Do let me know if you have any questions in case the question is not clear.

I don't understand exactly what is the way of working with maven projects in Eclipse. The problems I have are often with projects I download from github. If I set the project myself it usually work, so I think I'm doing something different from the majority of people.

I'll try to detail a specific case:

1. I clone a repo, let's say: https://github.com/spring-guides/tut-spring-boot-oauth2
2. In Eclipse I import "existing maven project"
3. The project has a "Maven nature" as indicated by M on the folder icon
4. I try to run java class with main from Eclipse. First strange thins is that the "Run As" menu doesn't have "Run as a Java application"
5. I have to configure the configuration manually. Now it runs, but strange things happens, like I can't edit the file as the "content assist" throw errors instead of giving the normal assists.
6. I notice that the project has no "source folder". So my first instinct is to add a Java nature or select src as source folder
7. So I add Java nature to the project. This is a disaster. It can compile anymore as it can find packages. All classes have errors. I try to play around setting source folders on /src or /src/main/java. Sometimes I fix the errors but I can't run (and now I have run as Java application) but when I run it can't load the class

So in the end, I'm a bit confused and I don't know if I explained clearly what I'm doing. I think I would like to know in a simple way how people are doing it, rather than trying to correct my steps as I'm probably creating a mess myself.

Any help or suggestion welcome. I'm using the last version of eclipse. I don't know which other tool's versions are relevant.

P.S. I also refresh,restart,clean rebuild the project often after touching things...but it doesn't get better

I have followed a Spring Boot tutorial Spring Boot and OAuth2 that has had the curl command to start the project:

But this curl command doesn't work. When I changed the command adding -o file_name parameter, it downloaded an empty file. I also create a listing of curl verbose mode. How to make curl work? Here are the commands in the terminal:

So I cant seem to wrap my head around this...

What could possibly the reason for this?

My settings:

Im using Spring Boot 2.3.3 in Combination with Vaadin 17.0.3. For oauth i use Spring-Boot-Oauth2. (Pretty much this tutorial: "https://vaadin.com/learn/tutorials/google-login")

It worked on Vaadin 14 but i guess after switching to Vaadin 16 something broke... Im trying to test some things, but a rollback isnt that easy for me rn.

My JDK is Java 14.

When Im trying to click on one of my OAuth Links, e.g. "/oauth/authorization/google" , my applicationr returns a 404. But when I enter the same link in the browser it works.

I dont know where to start, but I suspect it has to do something with Vaadins RouterLayout.

Any ideas what might cause this? I cant post code, since I dont know where the error could be...

If you need more information feel free to ask.

I have existing Spring Boot application with Spring Security 5 and OAuth2 client, I've successfully configured authentication with external OAuth2 provider (GitLab, in my case).

Now I have problem with configuring authorization. I'd like to have some method that would let me write code to resolve roles for given user (either by making a call to the database or just checking hard-coded username).

I've found out that it could be achieved by using PrincipalExtractor and AuthoritiesExtractor, described in a nice article. However, those classes are no longer present in recent Spring Security. What is an alternative way to achieve that, compatible with Spring Security 5?

I want to authenticate users with an external OAuth provider in my reactive spring boot application.

Following the official tutorial, I successfully implemented the flow with the pre-configured providers (Google, Github, etc.). Changing the configuration to not-pre-configured providers can be done using these properties, e.g.:

I'm trying to include a 'third-party' url in a vaadin 14 + spring boot application, namely the redirect url of spring-security for a single-sign on '/oauth2/authorization/github'. However the vaadin servlet seems to intercept this url and shows an error message that the route is unknown.

Could not navigate to 'oauth2/authorization/github'

Reason: Couldn't find route for 'oauth2/authorization/github'

How can this be prevented so the oauth2 url can be reached? I checked the vaadin documentation but found no information on how to exclude particular paths from the regular router navigation mechanism. The spring-boot oauth2 tutorial is from the official spring site https://spring.io/guides/tutorials/spring-boot-oauth2/ and the following dependencies were added: