Idea下SpringCloud2实验（四、Zuul网关实现路由转发和过滤）

短命女 2022-01-16 14:01 94阅读 0赞

一、创建springBoot项目springcloud-zuul-server项目  
![Idea下SpringCloud2实验（四、Zuul网关实现路由转发和过滤）][Idea_SpringCloud2_Zuul]

二、配置文件

1、pom.xml文件

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.1.4.RELEASE</version>
            <relativePath/> 
        </parent>
        <groupId>com.jane</groupId>
        <artifactId>springcloud-zuul-server</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>springcloud-zuul-server</name>
        <description>Demo project for Spring Boot</description>
    
        <properties>
            <java.version>1.8</java.version>
            <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    </project>

2、启动文件

package com.jane.springcloudzuulserver;
    
    import com.jane.springcloudzuulserver.filter.TokenFilter;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.ComponentScan;
    
    @SpringBootApplication
    @EnableDiscoveryClient
    @EnableZuulProxy
    public class SpringcloudZuulServerApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(SpringcloudZuulServerApplication.class, args);
        }
    
        //将过滤器在spring生成
        @Bean
        public TokenFilter tokenFilter() {
            return new TokenFilter();
        }
    
    }

3、application.properties

server.port=6030
    spring.application.name=zuul-gateway
    eureka.client.serviceUrl.defaultZone=http://127.0.0.1:6001/eureka/
    zuul.routes.springcloud-eureka-customer.path=/springcloud-eureka-customer/**

4、过滤器TokenFilter

package com.jane.springcloudzuulserver.filter;
    
    import com.netflix.zuul.ZuulFilter;
    import com.netflix.zuul.context.RequestContext;
    import com.netflix.zuul.exception.ZuulException;
    
    import javax.servlet.http.HttpServletRequest;
    
    public class TokenFilter extends ZuulFilter {
    
        //pre：主要用在路由映射的阶段是寻找路由映射表的
        //routing:具体的路由转发过滤器是在routing路由器，具体的请求转发的时候会调用
        //error:一旦前面的过滤器出错了，会调用error过滤器。
        //post:当routing，error运行完后才会调用该过滤器，是在最后阶段的
        @Override
        public String filterType() {
            return "pre";
        }
    
        //自定义过滤器执行的顺序，数值越大越靠后执行，越小就越先执行
        @Override
        public int filterOrder() {
            return 0;
        }
    
        //控制过滤器生效不生效，可以在里面写一串逻辑来控制,true是生效
        @Override
        public boolean shouldFilter() {
            return true;
        }
    
        //执行过滤逻辑
        @Override
        public Object run() throws ZuulException {
            RequestContext context = RequestContext.getCurrentContext();
            HttpServletRequest request = context.getRequest();
            //如果有授权服务器，这里可以做统一登陆授权校验
            String token = request.getParameter("token");
            if(token == null) {
                context.setSendZuulResponse(false);
                context.setResponseStatusCode(401);
                context.setResponseBody("no token , Auth deny");
            }
            return null;
        }
    }

三、启动文件，结合之前的文章 [注册中心][Link 1] [服务提供者][Link 2] [服务消费][Link 3]，全部启动  
1、服务如下图：  
![Idea下SpringCloud2实验（四、Zuul网关实现路由转发和过滤）][Idea_SpringCloud2_Zuul 1]

2、访问结果如下

没有token的请求：

![Idea下SpringCloud2实验（四、Zuul网关实现路由转发和过滤）][Idea_SpringCloud2_Zuul 2]

有token的请求：

![Idea下SpringCloud2实验（四、Zuul网关实现路由转发和过滤）][Idea_SpringCloud2_Zuul 3]

转载于:https://blog.51cto.com/janephp/2394514

[Idea_SpringCloud2_Zuul]: https://s1.51cto.com/images/blog/201905/14/e7a7488fafdbe32d6ee1b28ed821673e.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=
[Link 1]: https://blog.51cto.com/janephp/2391427
[Link 2]: https://blog.51cto.com/janephp/2391453
[Link 3]: https://blog.51cto.com/janephp/2391474
[Idea_SpringCloud2_Zuul 1]: https://s1.51cto.com/images/blog/201905/14/0f76c645b6e79bc1e41df123ec863039.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=
[Idea_SpringCloud2_Zuul 2]: https://s1.51cto.com/images/blog/201905/14/6bc35e30bde9599e13fe6635260cd5ab.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=
[Idea_SpringCloud2_Zuul 3]: https://s1.51cto.com/images/blog/201905/14/9e8b1afc6a0ddc77181556fa8aec1cd1.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=