Java Community | Help. Code. Learn.•5mo ago

Spring Boot Security / Request = 500

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).

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();

 .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 ) ?

61 Replies

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dan1st•5mo ago

Can you show the stack trace?

SungOP•5mo ago

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

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

Basically an exception 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}" />

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

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dan1st•5mo ago

Can you show the full stack trace instead of a part of it? Also for the security configuration, did you show the complete security configuration or is there more to it?

Peter Rader•5mo ago

Solution: Use curly bracets instead of round bracets.

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SungOP•5mo ago

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

dan1st•5mo ago

yeah I saw that ;) maybe I should increase my font size lol

SungOP•5mo ago

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

dan1st•5mo ago

which function exactly?

SungOP•5mo ago

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

dan1st•5mo ago

it isn't a static file it's a template

SungOP•5mo ago

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")
                );
            }

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

dan1st•5mo ago

static file means it's served without any modifications to it You have thymeleaf which processes/transforms it before sending it to the client Well, how are you reading the error in thymeleaf? You should be able to use CSS or similar things on it

SungOP•5mo ago

Oh I thought static files meant no dynamic code actually 🫣

dan1st•5mo ago

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

SungOP•5mo ago

Yes but I mean the terminology of static files let me check how I read the error in th

dan1st•5mo ago

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

SungOP•5mo ago

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

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SungOP•5mo ago

new FieldError("registerDto", "confirmPassword"
                    , "Password and confirm password do not match")
                );

new FieldError("registerDto", "confirmPassword"
                    , "Password and confirm password do not match")
                );

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

dan1st•5mo ago

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

SungOP•5mo ago

Yes but I think I find it 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

dan1st•5mo ago

Yeah Spring has many things to it I think in isolation, most are pretty understandable but doing many at once are complicated On the other hand, that's the big advantage - Spring provides all of these things to developers

SungOP•5mo ago

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

dan1st•5mo ago

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

SungOP•5mo ago

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

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

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

dan1st•5mo ago

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

SungOP•5mo ago

I've changed this class in a Tailwind class

th:errorclass="text-red-700 "

th:errorclass="text-red-700 "

dan1st•5mo ago

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

SungOP•5mo ago

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 It does at least for the color because I was able to change the color with a Tailwind utility class but I don't know if it's fully compatible between Thymeleaf and Tailwind tbh

dan1st•5mo ago

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

SungOP•5mo ago

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

dan1st•5mo ago

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SungOP•5mo ago

The utility class doesnt work anymore

dan1st•5mo ago

Which utility class?

SungOP•5mo ago

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

dan1st•5mo ago

Did you try with class= as well instead of just th:errorclass=? Does adding a custom style= work?

SungOP•5mo ago

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

dan1st•5mo ago

what error are you getting?

SungOP•5mo ago

It could work but this means I omit Tailwind

dan1st•5mo ago

and what's the code? it would be good to know whether it works for debugging

SungOP•5mo ago

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

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SungOP•5mo ago

@dan1st | Daniel 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"

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

dan1st•5mo ago

You still didn't specify whether it works with class instead of th:errorclass and also not whether non-Tailwind stuff works

SungOP•5mo ago

no it didn't as I said before

dan1st•5mo ago

ah then I overlooked that Does it work with non-Tailwind stuff?

SungOP•5mo ago

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

dan1st•5mo ago

because knowing that would help finding what causes the issue I don't really think that's the case Does the ont-semibold have any effect? Also can you check the HTML sent to the client in the devtools with th:errorclass="text-red-700 font-semibold"?

SungOP•5mo ago

it basically change your element in bold I don't understand what you're saying, you mean checking it in the network devtool ?

dan1st•5mo ago

almost in the inspector

SungOP•5mo ago

ok let me check after compile time

dan1st•5mo ago

though the network tab should work as well

SungOP•5mo ago

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

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

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

dan1st•5mo ago

ok yeah then you can probably not use th:errorclass there but that wouldn't explain class= not working (without a th:)

SungOP•5mo ago

I think it's because I'm using a thymeleaf element that has a thymeleaf object as a parent but it's ok I think, it's not a big deal

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Spring Boot Security / Request = 500