@Configuration
@EnableResourceServer // 標識為資源服務器，請求服務中的資源，就要帶著token過來，找不到token或token是無效訪問不了資源
@EnableGlobalMethodSecurity(prePostEnabled = true) // 開啟方法級別權限控制
public class ResourceServerConfig extends ResourceServerConfigurerAdapter implements CommandLineRunner {
 
 private final static Logger logger = LoggerFactory.getLogger(ResourceServerConfig.class);
 
 public static final String RESOURCE_ID = "user";
 
 /**
 * 權限不足返回給前端json
 */
 @Autowired
 private CustomAccessDeniedHandlerConfig customAccessDeniedHandlerConfig;
 
 @Autowired
 private TokenStore tokenStore;
 
 /**
 * token無效返回前段json
 */
 @Autowired
 private AuthExceptionEntryPointConfig authExceptionEntryPointConfig;
 
 @Override
 public void configure(ResourceServerSecurityConfigurer resources) throws Exception {
 // 當前資源服務器的資源id，認證服務會認證客戶端有沒有訪問這個資源id的權限，有則可以訪問當前服務
 resources.tokenStore(tokenStore).resourceId(RESOURCE_ID)
  // token無效異常的處理
  .authenticationEntryPoint(authExceptionEntryPointConfig)
  // 權限不足異常處理類
  .accessDeniedHandler(customAccessDeniedHandlerConfig)
  // 會話機制stateless開啟
  .stateless(true);
 }
 
 @Override
 public void configure(HttpSecurity http) throws Exception {
 http.sessionManagement()
  // SpringSecurity不會使用也不會創(chuàng)建HttpSession實例 因為整個oauth2后使用token
  .sessionCreationPolicy(SessionCreationPolicy.STATELESS).and().authorizeRequests()
  // 開放swagger請求
  .antMatchers("/swagger-ui.html", "/webjars/**", "/swagger-resources/**","/v2/**").permitAll()
  // 所有請求，都需要有all范圍（scope）
  .antMatchers("/**").access("#oauth2.hasScope('user')").
  anyRequest().authenticated().and().csrf()
  .disable();
 }
 
 @Bean
 public PasswordEncoder passwordEncoder() {
 return new BCryptPasswordEncoder();
 }
}

@Component
public class CustomAccessDeniedHandlerConfig implements AccessDeniedHandler {
 
 @Override
 public void handle(HttpServletRequest request, HttpServletResponse response,
 AccessDeniedException accessDeniedException) throws IOException, ServletException {
 response.setStatus(HttpStatus.OK.value());
 response.setHeader("Content-Type", "application/json;charset=UTF-8");
 try {
  Result result = new Result(403, "權限不足");
  response.getWriter().write(new ObjectMapper().writeValueAsString(result));
 } catch (IOException e) {
  e.printStackTrace();
 }
 }
}

@Component
public class AuthExceptionEntryPointConfig implements AuthenticationEntryPoint{
 
 private final static Logger logger = LoggerFactory.getLogger(AuthExceptionEntryPointConfig.class);
 
 @Value("${security.redirect-url}")
 private String redirectUrl;
 
 @Override
 public void commence(HttpServletRequest request, HttpServletResponse response,
 AuthenticationException authException) {
 Throwable cause = authException.getCause();
 response.setStatus(HttpStatus.OK.value());
 response.setHeader("Content-Type", "application/json;charset=UTF-8");
 Result result;
 try {
  if (cause instanceof InvalidTokenException) {
  result = new Result(402, "認證失敗,無效或過期token");
  response.getWriter().write(new ObjectMapper().writeValueAsString(result));
  } else {
  result = new Result(401, "認證失敗,沒有攜帶token");
  response.sendRedirect(redirectUrl);
  }
 
 } catch (IOException e) {
  e.printStackTrace();
 }
 }
}

@Configuration
public class TokenConfig{
 
 /**
 * 使用redis存儲
 */
 @Autowired
 private RedisConnectionFactory redisConnectionFactory;
 
 @Bean
 public TokenStore tokenStore() {
 return new RedisTokenStore(redisConnectionFactory);
 }
 
}

security:
 oauth2:
 client:
 client-id: user-vue
 client-secret: 1234
 resource:
 token-info-uri: http://localhost:8001/oauth/check_token