springcloud第五步：使用Zuul搭建服务接口网关
路由网关(zuul)
什么是网关
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， 类似于nginx转发。
搭建SpringCloud网关
创建工程service-zuul
Maven依赖
创建工程service-zuul
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<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.2.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent>
<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties>
<dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-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>Dalston.RC1</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>
<repositories> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> |
application.yml配置
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eureka: client: serviceUrl: defaultZone: http://localhost:8888/eureka/ server: port: 8769 spring: application: name: service-zuul zuul: routes: api-a: path: /api-member/** service-id: service-member api-b: path: /api-order/** service-id: service-order |
发送请求http://127.0.0.1:8769/api-member/getMemberAll
转发到http://127.0.0.1:8762/getMemberAll
开启网关 @EnableZuulProxy
服务过滤
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@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; }
public boolean shouldFilter() { return true; }
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) { return 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;
} } |
如果请求参数中没有传入token参数 直接返回报错信息
传入token参数可以正常访问请求
