Spring Boot Security / Request = 500 | Java Community | Help. Code. Learn. | Page 1

pseudo verge Jul 20, 2024, 9:32 PM

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Hello guys, I'm a beginner here who's trying Spring Boot security.

I'm trying to sign in with the httpSecurity but when I do my sign-in request, SPring boot redirects me to the famous ```Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.
Sat Jul 20 23:12:55 CEST 2024
There was an unexpected error (type=Internal Server Error, status=500).``` issue.

The thing is in my security configuration I understand I have to modify this line :

.formLogin(form -> form

               // Redirect the user if successfull authentication
                           .defaultSuccessUrl("/",true)
                           
               )
               .logout(config-> config.logoutSuccessUrl("/"))
               // Redirect the user if log the fuck out
               .build();```

But my home URL is `http://localhost:8080/` do you know how to modify the url to at least redirect it to the homepage ( I built my environment with Maven ) ?

plain sageBOT Jul 20, 2024, 9:32 PM

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mellow olive Jul 20, 2024, 9:47 PM

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Can you show the stack trace?

pseudo verge Jul 20, 2024, 9:56 PM

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org.thymeleaf.exceptions.TemplateProcessingException: Could not parse as expression: "$(_csrf.parameterName)" (template: "index" - line 39, col 42)```

Basically an exception

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and this is my code at line 39 in my index.html :

<form action="/logout" method="post" sec:authorize="isAuthenticated()">
                    <input type="hidden" th:name="$(_csrf.parameterName)" 
                           th:value="${_csrf.token}" />

plain sageBOT Jul 21, 2024, 3:00 AM

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mellow olive Jul 21, 2024, 5:43 AM

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Can you show the full stack trace instead of a part of it?

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Also for the security configuration, did you show the complete security configuration or is there more to it?

warped plover Jul 21, 2024, 7:00 AM

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pseudo verge and this is my code at line 39 in my `index.html ` : ```html <form action="/log...

Solution: Use curly bracets instead of round bracets.

plain sageBOT Jul 21, 2024, 12:10 PM

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pseudo verge Jul 21, 2024, 12:39 PM

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mellow olive Can you show the full stack trace instead of a part of it?

Sorry for that.
@warped plover found the solution, I did a stupid syntax error as he said

mellow olive Jul 21, 2024, 12:39 PM

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yeah I saw that ;)

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maybe I should increase my font size lol

pseudo verge Jul 21, 2024, 12:40 PM

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Do you know if there's a way to personalize the errorMessage function ?

mellow olive Jul 21, 2024, 12:40 PM

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which function exactly?

pseudo verge Jul 21, 2024, 12:41 PM

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I think I should do that too, because I wasn't even aware of the slack track, I was pretty sure I had to configure my security config and not my static file lol

mellow olive Jul 21, 2024, 12:43 PM

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it isn't a static file

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it's a template

pseudo verge Jul 21, 2024, 12:45 PM

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Here in my Account controller :


    @PostMapping("/register")
    public String register(
        Model model, 
        @Valid @ModelAttribute RegisterDto registerDto,
        BindingResult result
        ){
            // Handling authentification errors if its equals to the Password field and Confirm password are different 
            if(!registerDto.getPassword().equals(registerDto.getConfirmPassword())){
                result.addError(
                    new FieldError("registerDto", "confirmPassword"
                    , "Password and confirm password do not match")
                );
            }

            AppUser appUser = repo.findByEmail(registerDto.getEmail());
            if(appUser != null){
                result.addError(
                    new FieldError("registerDto","email"
                    ,"Email adress is already used")
                );
            }

I call the addError but the thing is on the client side, it appears in black and I would like to change the color or the font-size and I've done research to personnalize it but can't find any

pseudo verge Jul 21, 2024, 12:45 PM

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mellow olive it's a template

Oh wait it's basically a static file because it's a template or because I'm using thymeleaf ?

mellow olive Jul 21, 2024, 12:46 PM

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pseudo verge Oh wait it's basically a static file because it's a template or because I'm usin...

static file means it's served without any modifications to it

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You have thymeleaf which processes/transforms it before sending it to the client

mellow olive Jul 21, 2024, 12:47 PM

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pseudo verge Here in my Account controller : ```java @PostMapping("/register") pub...

Well, how are you reading the error in thymeleaf?

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You should be able to use CSS or similar things on it

pseudo verge Jul 21, 2024, 12:47 PM

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mellow olive static file means it's served without any modifications to it

Oh I thought static files meant no dynamic code actually 🫣

mellow olive Jul 21, 2024, 12:47 PM

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pseudo verge Oh I thought static files meant no dynamic code actually 🫣

?

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idk how exactly thymeleaf does it but with JSP, you are essentially generating Java code dynamically IIRC

pseudo verge Jul 21, 2024, 12:48 PM

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Yes but I mean the terminology of static files

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let me check how I read the error in th

mellow olive Jul 21, 2024, 12:49 PM

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Essentially with Thymeleaf, you define a template and thymeleaf renders the template (idk whether it uses some intermediate representation or other internals though)

pseudo verge Jul 21, 2024, 12:50 PM

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Ok thanks for the explanation, I'm still a bit confused about the whole Spring Boot environement

plain sageBOT Jul 21, 2024, 12:50 PM

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pseudo verge Ok thanks for the explanation, I'm still a bit confused about the whole Spring B...

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pseudo verge Jul 21, 2024, 12:50 PM

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                    , "Password and confirm password do not match")
                );```

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( sorry for the indentation ) I'm generating the message with the FieldError function

mellow olive Jul 21, 2024, 12:59 PM

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So you are still talking about the errors displayed in a way you don't want, right?

pseudo verge Jul 21, 2024, 1:02 PM

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Yes but I think I find it

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I think instead of writing codes I don't understand, I need to learn the entire Spring Boot architecture from the Controller to the DTO

mellow olive Jul 21, 2024, 1:04 PM

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Yeah Spring has many things to it

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I think in isolation, most are pretty understandable

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but doing many at once are complicated

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On the other hand, that's the big advantage - Spring provides all of these things to developers

pseudo verge Jul 21, 2024, 1:27 PM

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Yes I totally agree with you, I just find the solution to my problem but I can't really modify everything ( I've figured out how to change my error messages color, but the the style etc )
I'm still confused about the DTO and the entities to me it does the same thing

mellow olive Jul 21, 2024, 1:37 PM

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Which problem? Is it the errors being displayed in a way you don't want or is it something different?

pseudo verge Jul 21, 2024, 2:38 PM

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I mean I would to put other font style in the same attribute but this gives me an error ( it's the same thymeleaf attribute where I changed the color ) I tried to put an italic style but this rendered me an error

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<p th:if="${#fields.hasErrors('phone')}" th:errorclass="text-red-700 " th:errors="${registerDto.phone}"></p>```

mellow olive Jul 21, 2024, 2:47 PM

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What exactly did you change and what's the exact error it resulted in?

pseudo verge Jul 21, 2024, 2:58 PM

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I've changed this class in a Tailwind class th:errorclass="text-red-700 "

mellow olive Jul 21, 2024, 3:00 PM

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I don't think tailwind knows about Thymeleaf so adding a th:something in Tailwind probably isn't useful

pseudo verge Jul 21, 2024, 3:00 PM

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and I've discovered that if you set the annotation with no message in the DTO, it render a default message in my native language ( whch is weird because I set the html tag in english

pseudo verge Jul 21, 2024, 3:01 PM

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mellow olive I don't think tailwind knows about Thymeleaf so adding a `th:something` in Tailw...

It does at least for the color because I was able to change the color

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with a Tailwind utility class

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but I don't know if it's fully compatible between Thymeleaf and Tailwind tbh

mellow olive Jul 21, 2024, 3:02 PM

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Instead of th:errorclass="text-red-700 ", can you try class="text-red-700"?

pseudo verge Jul 21, 2024, 3:06 PM

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It doesn't render me in red anymore so I have to leave it that way

mellow olive Jul 21, 2024, 3:18 PM

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?

plain sageBOT Jul 21, 2024, 8:20 PM

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pseudo verge Jul 21, 2024, 8:37 PM

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mellow olive ?

The utility class doesnt work anymore

mellow olive Jul 21, 2024, 8:39 PM

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Which utility class?

pseudo verge Jul 21, 2024, 9:15 PM

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The text-red-700, it's a Tailwind class

mellow olive Jul 21, 2024, 9:20 PM

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Did you try with class= as well instead of just th:errorclass=?

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Does adding a custom style= work?

pseudo verge Jul 21, 2024, 9:24 PM

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mellow olive Did you try with `class=` as well instead of just `th:errorclass=`?

Yes but I want to add another class and it doesn't work, for example I'd like to add font-bold or font-italic behind the text-red but at run time it gives me an error

mellow olive Jul 21, 2024, 9:24 PM

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what error are you getting?

pseudo verge Jul 21, 2024, 9:25 PM

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mellow olive Does adding a custom `style=` work?

It could work but this means I omit Tailwind

mellow olive Jul 21, 2024, 9:25 PM

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mellow olive what error are you getting?

and what's the code?

mellow olive Jul 21, 2024, 9:25 PM

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pseudo verge It could work but this means I omit Tailwind

it would be good to know whether it works for debugging

pseudo verge Jul 21, 2024, 9:26 PM

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Let me do this tomorrow because I'm not at home rn, I will ping you with the code you want

plain sageBOT Jul 22, 2024, 2:30 AM

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pseudo verge Jul 22, 2024, 2:32 PM

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@mellow olive
in this code, as I said yesterday, I tried to add another Tailwind class to modify my element

th:errorclass="text-red-700 font-semibold"

The font-semibold is the other class I wanted to add or font-italic, in both cases and based on the Tailwind documentation it should work but as you said maybe Thymeleaf is only compatible with only one class

mellow olive Jul 22, 2024, 3:30 PM

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You still didn't specify whether it works with class instead of th:errorclass

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and also not whether non-Tailwind stuff works

pseudo verge Jul 22, 2024, 5:40 PM

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mellow olive You still didn't specify whether it works with class instead of th:errorclass

no it didn't as I said before

mellow olive Jul 22, 2024, 5:40 PM

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ah then I overlooked that

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Does it work with non-Tailwind stuff?

pseudo verge Jul 22, 2024, 5:41 PM

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no problem, I think thymeleaf doen't allow me to have more than one utlity class

mellow olive Jul 22, 2024, 5:41 PM

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because knowing that would help finding what causes the issue

mellow olive Jul 22, 2024, 5:41 PM

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pseudo verge no problem, I think thymeleaf doen't allow me to have more than one utlity class

I don't really think that's the case

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Does the ont-semibold have any effect?

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Also can you check the HTML sent to the client in the devtools with th:errorclass="text-red-700 font-semibold"?

pseudo verge Jul 22, 2024, 5:42 PM

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it basically change your element in bold

pseudo verge Jul 22, 2024, 5:42 PM

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mellow olive Also can you check the HTML sent to the client in the devtools with `th:errorcla...

I don't understand what you're saying, you mean checking it in the network devtool ?

mellow olive Jul 22, 2024, 5:43 PM

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almost

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in the inspector

pseudo verge Jul 22, 2024, 5:43 PM

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ok let me check after compile time

mellow olive Jul 22, 2024, 5:43 PM

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though the network tab should work as well

pseudo verge Jul 22, 2024, 5:49 PM

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Ok so at run time I have this exception which is directly in correlation with my tailwind classes

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org.thymeleaf.exceptions.TemplateProcessingException: Could not parse as expression: "text-red-700 font-semibold" (template: "register" - line 56, col 70)

mellow olive Jul 22, 2024, 6:07 PM

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ok yeah then you can probably not use th:errorclass there

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but that wouldn't explain class= not working (without a th:)

pseudo verge Jul 22, 2024, 6:11 PM

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I think it's because I'm using a thymeleaf element that has a thymeleaf object as a parent

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but it's ok I think, it's not a big deal

plain sageBOT Jul 22, 2024, 11:20 PM

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#Spring Boot Security / Request = 500