Spring Cloud Zuul 获取当前请求的路由信息

川长思鸟来 2022-01-14 03:29 360阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

# 基本思路 #

参考spring-cloud-zuul-ratelimit开源项目，在过滤器中根据当前的请求路径，判断当前的路由信息，当取得路由信息后，可以对服务的调用次数做统计等操作。

# 具体实现 #

## 创建一个AbstractRouteFilter ##

public abstract class AbstractRouteFilter extends ZuulFilter {
    
        private final RouteLocator routeLocator;
        private final UrlPathHelper urlPathHelper;
    
        AbstractRouteFilter(RouteLocator routeLocator,UrlPathHelper urlPathHelper){
            this.routeLocator = routeLocator;
            this.urlPathHelper = urlPathHelper;
        }
    	//核心逻辑，获取请求路径，利用RouteLocator返回路由信息
        protected Route route(HttpServletRequest request){
            String requestURI = urlPathHelper.getPathWithinApplication(request);
            return routeLocator.getMatchingRoute(requestURI);
        }
    
    }

使用时，继承AbstractRouteFilter即可，下面演示一个服务调用次数的过滤器示例

## 示例 ##

public class RouteTimesFilter extends AbstractRouteFilter {
    
        public RouteTimesFilter(RouteLocator routeLocator, UrlPathHelper urlPathHelper) {
            super(routeLocator,urlPathHelper);
        }
    
        @Override
        public String filterType() {
    		//可以根据业务要求，修改过滤器类型
            return "post";
        }
    
        @Override
        public int filterOrder() {
    		//过滤器顺序
            return 0;
        }
    
        @Override
        public boolean shouldFilter() {
    		//可以根据业务要求，过滤相关路由
            return true;
        }
    
        @Override
        public Object run() {
            RequestContext ctx = RequestContext.getCurrentContext();
            Route route = route(ctx.getRequest());
    		//获取到路由信息，就可以做想要做的事了
            System.out.println(route);
            return null;
        }
    }

## 配置过滤器 ##

@Component
    public class ZuulFilterConfig {
    
        @Bean
        public ZuulFilter routeTimesFilter(RouteLocator routeLocator){
            return new RouteTimesFilter(routeLocator,new UrlPathHelper());
        }
    
    }

转载于:https://my.oschina.net/u/3226414/blog/1929936

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220113/376e0fc147d34d5c970c16c3f652935b.png