JwtAuthenticationFilter.java

package com.licensis.notaire.config;

import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

import java.io.IOException;
import java.util.List;

@Component
public class JwtAuthenticationFilter extends OncePerRequestFilter {

    private final JwtTokenService jwtTokenService;

    public JwtAuthenticationFilter(JwtTokenService jwtTokenService) {
        this.jwtTokenService = jwtTokenService;
    }

    @Override
    protected void doFilterInternal(HttpServletRequest request,
                                    HttpServletResponse response,
                                    FilterChain filterChain) throws ServletException, IOException {
        String authHeader = request.getHeader("Authorization");
        if (authHeader != null && authHeader.startsWith("Bearer ")) {
            String token = authHeader.substring(7);
            if (jwtTokenService.isValid(token)) {
                String username = jwtTokenService.extractUsername(token);
                var auth = new UsernamePasswordAuthenticationToken(username, null, List.of());
                SecurityContextHolder.getContext().setAuthentication(auth);
            }
        }
        filterChain.doFilter(request, response);
    }
}