[Java] 详解spring cloud ouath2中的资源服务器

@Configuration
@EnableResourceServer // 标识为资源服务器，请求服务中的资源，就要带着token过来，找不到token或token是无效访问不了资源
@EnableGlobalMethodSecurity(prePostEnabled = true) // 开启方法级别权限控制
public class ResourceServerConfig extends ResourceServerConfigurerAdapter implements CommandLineRunner {
 
 private final static Logger logger = LoggerFactory.getLogger(ResourceServerConfig.class);
 
 public static final String RESOURCE_ID = "user";
 
 /**
 * 权限不足返回给前端json
 */
 @Autowired
 private CustomAccessDeniedHandlerConfig customAccessDeniedHandlerConfig;
 
 @Autowired
 private TokenStore tokenStore;
 
 /**
 * token无效返回前段json
 */
 @Autowired
 private AuthExceptionEntryPointConfig authExceptionEntryPointConfig;
 
 @Override
 public void configure(ResourceServerSecurityConfigurer resources) throws Exception {
 // 当前资源服务器的资源id，认证服务会认证客户端有没有访问这个资源id的权限，有则可以访问当前服务
 resources.tokenStore(tokenStore).resourceId(RESOURCE_ID)
  // token无效异常的处理
  .authenticationEntryPoint(authExceptionEntryPointConfig)
  // 权限不足异常处理类
  .accessDeniedHandler(customAccessDeniedHandlerConfig)
  // 会话机制stateless开启
  .stateless(true);
 }
 
 @Override
 public void configure(HttpSecurity http) throws Exception {
 http.sessionManagement()
  // SpringSecurity不会使用也不会创建HttpSession实例 因为整个oauth2后使用token
  .sessionCreationPolicy(SessionCreationPolicy.STATELESS).and().authorizeRequests()
  // 开放swagger请求
  .antMatchers("/swagger-ui.html", "/webjars/**", "/swagger-resources/**","/v2/**").permitAll()
  // 所有请求，都需要有all范围（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, "权限不足");
  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, "认证失败,无效或过期token");
  response.getWriter().write(new ObjectMapper().writeValueAsString(result));
  } else {
  result = new Result(401, "认证失败,没有携带token");
  response.sendRedirect(redirectUrl);
  }
 
 } catch (IOException e) {
  e.printStackTrace();
 }
 }
}

@Configuration
public class TokenConfig{
 
 /**
 * 使用redis存储
 */
 @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