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

2024-11-16 技术教程

一、创建springBoot项目springcloud-zuul-server项目

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@EnableZuulProxypublic 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=6030spring.application.name=zuul-gatewayeureka.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服务提供者服务消费，全部启动
1、服务如下图：

2、访问结果如下

没有token的请求：

有token的请求：