springcloud实战之12 路由网关拦截器

我会带着你远行 2022-06-03 06:57 178阅读 0赞

为了能够在api网关中实现对客户端请求的校验，我们将继续介绍spring cloud zuul的另外一个核心功能：请求过滤。zuul允许开发这在api-gateway网关上通过定义过滤器来实现对请求的核心拦截与过滤，实现的方法非常简单。

## 重构工程（springcloud-server-api-gateway） ##

### 新建过滤类 ###

public class AccessFilter extends ZuulFilter { 
        private final Logger _logger = LoggerFactory.getLogger(this.getClass()) ;
        @Override
        public String filterType() {
            return "pre";
        }
    
        @Override
        public int filterOrder() {
            return 0;
        }
    
        @Override
        public boolean shouldFilter() {
            return true;
        }
    
        @Override
        public Object run() {
            RequestContext ctx = RequestContext.getCurrentContext() ;
            HttpServletRequest request = ctx.getRequest() ;
    
            _logger.info("send {} to {}",request.getMethod(),request.getRequestURL().toString());
    
            Object token = request.getParameter("token") ;
            if(null == token){
                _logger.error("token is null ...");
                ctx.setSendZuulResponse(false);
                ctx.setResponseStatusCode(401);
            }else{
                _logger.info("access token is ok!!!");
            }
            return null;
        }
    }

### 注册过滤器 ###

@Configuration
    public class ApiGatewayConfig { 
    
        @Bean
        public AccessFilter accessFilter(){
            return new AccessFilter();
        }
    }

## 调用效果图 ##

调用原来的接口，

调用地址：[http://localhost:8004/api-b/api/rest/getMessage][http_localhost_8004_api-b_api_rest_getMessage]

![这里写图片描述][SouthEast]

调用地址：[http://localhost:8004/api-b/api/rest/getMessage?token=sss][http_localhost_8004_api-b_api_rest_getMessage_token_sss]

![这里写图片描述][SouthEast 1]

## 源码 ##

[springcloud-server-eureka][]

[springcloud-producer-rest][]

[springcloud-consumer-feign][]

[springcloud-consumer-ribbon][]

[springcloud-server-api-gateway][]

## 历史文章 ##

[springcloud实战之1 技术选型：dubbo还是springcloud][springcloud_1 _dubbo_springcloud]

[springcloud实战之2 服务注册与发现（eureka实现）][springcloud_2 _eureka]

[springcloud实战之3 高可用服务注册中心（eureka集群）][springcloud_3 _eureka]

[springcloud实战之5 服务消费者（ribbon）][springcloud_5 _ribbon]

[springcloud实战之6 服务消费者（Feign）][springcloud_6 _Feign]

[springcloud实战之7 断路器（Hystrix）][springcloud_7 _Hystrix]

[springcloud实战之8 断路器-仪表盘-单例监控（Hystrix）][springcloud_8 _-_-_Hystrix]

[springcloud实战之9断路器-集群监控（turbine）][springcloud_9_-_turbine]

[springcloud实战之10 分布式配置中心（config）][springcloud_10 _config]

[springcloud实战之11路由网关（zuul）][springcloud_11_zuul]

[http_localhost_8004_api-b_api_rest_getMessage]: http://localhost:8004/api-b/api/rest/getMessage
[SouthEast]: /images/20220603/87b687843d30425c8384d9b434bdcb3c.png
[http_localhost_8004_api-b_api_rest_getMessage_token_sss]: http://localhost:8004/api-b/api/rest/getMessage?token=sss
[SouthEast 1]: /images/20220603/e1c1d093a06246fc910669c495505a81.png
[springcloud-server-eureka]: https://github.com/shiyuan2he/springcloud/tree/master/springcloud-server-eureka
[springcloud-producer-rest]: https://github.com/shiyuan2he/springcloud/tree/master/springcloud-producer-rest
[springcloud-consumer-feign]: https://github.com/shiyuan2he/springcloud/tree/master/springcloud-consumer-feign
[springcloud-consumer-ribbon]: https://github.com/shiyuan2he/springcloud/tree/master/springcloud-consumer-ribbon
[springcloud-server-api-gateway]: https://github.com/shiyuan2he/springcloud/tree/master/springcloud-server-api-gateway
[springcloud_1 _dubbo_springcloud]: http://blog.csdn.net/u012806787/article/details/78789312
[springcloud_2 _eureka]: http://blog.csdn.net/u012806787/article/details/78790958
[springcloud_3 _eureka]: http://blog.csdn.net/u012806787/article/details/78793639
[springcloud_5 _ribbon]: http://blog.csdn.net/u012806787/article/details/78796605
[springcloud_6 _Feign]: http://blog.csdn.net/u012806787/article/details/78798951
[springcloud_7 _Hystrix]: http://blog.csdn.net/u012806787/article/details/78801119
[springcloud_8 _-_-_Hystrix]: http://blog.csdn.net/u012806787
[springcloud_9_-_turbine]: http://blog.csdn.net/u012806787/article/details/78862637
[springcloud_10 _config]: http://blog.csdn.net/u012806787/article/details/78803198
[springcloud_11_zuul]: http://blog.csdn.net/u012806787/article/details/78863867