Maxence Posts - Answer Overflow

Maxence

•Created by Maxence on 4/8/2025 in #java-help

Do not receive Headers from Front-end with JWT

Hi, I work on a website and I send a token with axios with the front-end

export default {
  data() {
    return {
      produits: [] // Tableau pour stocker les produits
    };
  },
  created() {
    // Appel à l'API pour récupérer les produits
    axios
        .get("http://localhost:8080/api/produits", {
          headers: {
            "Authorization": `Bearer ${localStorage.getItem("token")}`
          }
        }) // URL du back-end
        .then((response) => {
          this.produits = response.data; // On stocke les produits dans la variable produits
          console.log("Produits après assignation : ", this.produits);
        })
        .catch((error) => {
          console.error("Il y a une erreur lors de la récupération des produits : ", error);
        });
  }
};

export default {
  data() {
    return {
      produits: [] // Tableau pour stocker les produits
    };
  },
  created() {
    // Appel à l'API pour récupérer les produits
    axios
        .get("http://localhost:8080/api/produits", {
          headers: {
            "Authorization": `Bearer ${localStorage.getItem("token")}`
          }
        }) // URL du back-end
        .then((response) => {
          this.produits = response.data; // On stocke les produits dans la variable produits
          console.log("Produits après assignation : ", this.produits);
        })
        .catch((error) => {
          console.error("Il y a une erreur lors de la récupération des produits : ", error);
        });
  }
};

but my jwt filter don't see the headers Authorization, it's always null I don"t know why. The filter is used with SecurityConfig with addFilterBefore(...)

public class JwtFilter extends OncePerRequestFilter {

    private final UserService userService;
    private final JwtUtils jwtUtils;

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        System.out.println("Executing JWT Filter");
        System.out.println("request: " + request);

        // Permet de récupérer le token via le header
        final String authorizationHeader = request.getHeader("Authorization");
        System.out.println("Authorization header: " + authorizationHeader);

        String email = null;
        String jwt = null;

    //-----

}

public class JwtFilter extends OncePerRequestFilter {

    private final UserService userService;
    private final JwtUtils jwtUtils;

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        System.out.println("Executing JWT Filter");
        System.out.println("request: " + request);

        // Permet de récupérer le token via le header
        final String authorizationHeader = request.getHeader("Authorization");
        System.out.println("Authorization header: " + authorizationHeader);

        String email = null;
        String jwt = null;

    //-----

}

5 replies

JCHJava Community | Help. Code. Learn.

•Created by Maxence on 3/27/2025 in #java-help

JWT & Spring Boot

Hello, I develop a website and I have some questions for the connexion with users. For the back-end, I use Spring Boot and I have this function :

 @PostMapping("/login")
    public ResponseEntity<?> loginUser(@RequestBody User user) {
        User userFound = userRepository.findByEmail(user.getEmail());
        if(userFound == null) {
            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body("Email non trouvé");
        }

        if(!passwordEncoder.matches(user.getPassword(), userFound.getPassword())) {
            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body("Mot de passe incorrect");
        }

        return ResponseEntity.ok("Login effectué");
    }

 @PostMapping("/login")
    public ResponseEntity<?> loginUser(@RequestBody User user) {
        User userFound = userRepository.findByEmail(user.getEmail());
        if(userFound == null) {
            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body("Email non trouvé");
        }

        if(!passwordEncoder.matches(user.getPassword(), userFound.getPassword())) {
            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body("Mot de passe incorrect");
        }

        return ResponseEntity.ok("Login effectué");
    }

I return this because I don't really know what to return. I would like use a JWT token and I search on the web and I don't understand what I have to do. Actually I would like a token and all the informations I need about the user (email, name etc...) , so what can I return and how to convert these datas in VueJS (I use Axios to recover the datas) ?

14 replies

JCHJava Community | Help. Code. Learn.

•Created by Maxence on 3/25/2025 in #java-help

Spring boot

Hi, I am a beginner at Spring Boot and I tried to configure my API espcially for user connexion. I have a database which is connected and it works. But I try to create a SecurityConfig and I have this error : java: variable userService not initialized in the default constructor In the code (after this message), I use @RequiredArgsConstructor so it should work... I have a problem with the model User for the database because it says it doesnt find getters but I use @Data with Loombook and it works on another model. Can someone please try to explain me ?

39 replies

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