@Service
public class TokenService {
@Value("${api.security.token.secret}")
private String secret;
public String gerarToken(Usuario usuario){
try {
var algoritmo = Algorithm.HMAC256(secret);
return JWT.create()
.withIssuer("API Voll.med")
.withSubject(usuario.getLogin())
.withExpiresAt(dataExpiracao())
.sign(algoritmo);
} catch (JWTCreationException exception){
throw new RuntimeException("erro ao gerar token jwt", exception);
}
}
public String getSubject(String tokenJWT){
try {
var algoritmo = Algorithm.HMAC256(secret);
return JWT.require(algoritmo)
.withIssuer("API Voll.med")
.build()
.verify(tokenJWT)
.getSubject();
} catch (JWTVerificationException exception){
exception.printStackTrace();
throw new RuntimeException("Token JWT inválido ou expirado!");
}
}
private Instant dataExpiracao() {
return LocalDateTime.now().plusHours(2).toInstant(ZoneOffset.of("-03:00"));
}
}
# 1.
@Component
public class SecurityFilter extends OncePerRequestFilter {
@Autowired
private TokenService tokenService;
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
var tokenJWT = recuperarToken(request);
var subject = tokenService.getSubject(tokenJWT);
System.out.println(subject);
filterChain.doFilter(request, response);
}
private String recuperarToken(HttpServletRequest request) {
var authorizationHeader = request.getHeader("Authorization");
if (authorizationHeader == null){
throw new RuntimeException("Token JWT não enviado no cabeçalho Authorization!");
}
return authorizationHeader.replace("Bearer", "");
}
}
@RestController
@RequestMapping("/login")
public class AutenticacaoController {
@Autowired
private AuthenticationManager manager;
@Autowired
private TokenService tokenService;
@PostMapping
public ResponseEntity efetuarLogin(@RequestBody @Valid DadosAutenticacao dados){
var autenticationtoken = new UsernamePasswordAuthenticationToken(dados.login(), dados.senha());
var authentication = manager.authenticate(autenticationtoken);
var tokenJWT = tokenService.gerarToken((Usuario) authentication.getPrincipal());
return ResponseEntity.ok(new DadosTokenJWT(tokenJWT));
}
}
