Zuul实现微服务的API网关（三）

management:
  endpoints:
    web:
      exposure:
        include: routes

spring:
  application:
    name: zuul-gateway

@EnableZuulProxy
@EnableCaching
@SpringBootApplication
public class ZuulApplication {

    public static void main(String[] args) {
        SpringApplication.run(ZuulApplication.class, args);
    }

    @Autowired
    private RouteLocator routeLocator;

    @Autowired
    private CacheManager cacheManager;

    @Bean
    public ZuulFilter myFilter() {
        return new ZuulFilter() {
            @Override
            public String filterType() {
                return "pre";
            }

            @Override
            public int filterOrder() {
                return 0;
            }

            @Override
            public boolean shouldFilter() {
                return true;
            }

            @Override
            public Object run() throws ZuulException {
                RequestContext context = RequestContext.getCurrentContext();
                HttpServletRequest request = context.getRequest();
                HttpServletResponse response = context.getResponse();
                // 对请求或响应进行处理
                return null;
            }
        };
    }

    @RequestMapping("/users/{id}")
    @Cacheable(value = "users", key = "#id")
    public User getUserById(@PathVariable Long id) {
        // 从数据库中获取用户信息
        return userRepository.findById(id);
    }

    @GetMapping("/actuator/routes")
    public Map<String, Object> getRoutes() {
        List<Route> routes = routeLocator.getRoutes();
        Map<String, Object> result = new HashMap<>();
        result.put("routes", routes);
        return result;
    }
}