java B2B2C Springboot电子商城系统-路由网关(zuul)
一、Zuul简介 Zuul的主要功能是路由转发和过滤器。路由功能是微服务的一部分,比如/api/user转发到到user服务,/api/shop转发到到shop服务。zuul默认和Ribbon结合实现了负载均衡的功能。 zuul有以下功能: Authentication Insights Stress Testing Canary Testing Dynamic Routing Service Migration Load Shedding Security Static Response handling Active/Active traffic management 二、创建service-zuul工程 pom.xml文件如下 <?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> <groupId>com.forezp</groupId> <artifactId>service-zuul</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>service-zuul</name> <description>Demo project for Spring Boot</description> <parent> <groupId>com.forezp</groupId> <artifactId>sc-f-chapter5</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-zuul</artifactId> </dependency> </dependencies> </project> 在其入口applicaton类加上注解@EnableZuulProxy,开启zuul的功能: @SpringBootApplication @EnableZuulProxy @EnableEurekaClient @EnableDiscoveryClient public class ServiceZuulApplication { public static void main(String[] args) { SpringApplication.run( ServiceZuulApplication.class, args ); } } 加上配置文件application.yml加上以下的配置代码: eureka: client: serviceUrl: defaultZone: http://localhost:8761/eureka/ server: port: 8769 spring: application: name: service-zuul zuul: routes: api-a: path: /api-a/** serviceId: service-ribbon api-b: path: /api-b/** serviceId: service-feign 首先指定服务注册中心的地址为http://localhost:8761/eureka/,服务的端口为8769,服务名为service-zuul;以/api-a/ 开头的请求都转发给service-ribbon服务;以/api-b/开头的请求都转发给service-feign服务; 依次运行这五个工程;打开浏览器访问:http://localhost:8769/api-a/hi?name=forezp ;浏览器显示: hi forezp,i am from port:8762 打开浏览器访问:http://localhost:8769/api-b/hi?name=forezp ;浏览器显示: hi forezp,i am from port:8762 这说明zuul起到了路由的作用 三、服务过滤 zuul不仅只是路由,并且还能过滤,做一些安全验证。继续改造工程; @Component public class MyFilter extends ZuulFilter { private static Logger log = LoggerFactory.getLogger(MyFilter.class); @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(); log.info(String.format("%s >>> %s", request.getMethod(), request.getRequestURL().toString())); Object accessToken = request.getParameter("token"); if(accessToken == null) { log.warn("token is empty"); ctx.setSendZuulResponse(false); ctx.setResponseStatusCode(401); try { ctx.getResponse().getWriter().write("token is empty"); }catch (Exception e){} return null; } log.info("ok"); return null; } } filterType:返回一个字符串代表过滤器的类型,在zuul中定义了四种不同生命周期的过滤器类型,具体如下: pre:路由之前 routing:路由之时 post: 路由之后 error:发送错误调用 filterOrder:过滤的顺序 shouldFilter:这里可以写逻辑判断,是否要过滤,本文true,永远过滤。 run:过滤器的具体逻辑。可用很复杂,包括查sql,nosql去判断该请求到底有没有权限访问。 这时访问:http://localhost:8769/api-a/hi?name=forezp ;网页显示: token is empty //需要JAVA Spring Cloud大型企业分布式微服务云构建的B2B2C电子商务平台源码 一零三八七七四六二六 访问 http://localhost:8769/api-a/hi?name=forezp&token=22 ; 网页显示: hi forezp,i am from port:8762 java B2B2C springmvc mybatis电子商务平台源码