服務網關是微服務架構中一個不可或缺的部分。通過服務網關統一向外系統提供REST API的過程中，除了具備服務路由、均衡負載功能之外，它還具備了權限控制等功能。Spring Cloud Netflix中的Zuul就擔任了這樣的一個角色，為微服務架構提供了前門保護的作用，同時將權限控制這些較重的非業務邏輯內容遷移到服務路由層面，使得服務集群主體能夠具備更高的可復用性和可測試性。

pom.xml

<?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.packtpub</groupId><artifactId>Zuul</artifactId><version>1.0.0</version><packaging>jar</packaging><name>Zuul</name><description>com.packtpub.Zuul</description><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.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-zuul</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-eureka</artifactId></dependency></dependencies><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>Camden.SR6</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>

application.properties

spring.application.name=api-gateway server.port=5555zuul.routes.api-b.path=/compute-service/** zuul.routes.api-b.serviceId=compute-service eureka.client.serviceUrl.defaultZone=http://localhost:1111/eureka/

AccessFilter.java

package com.packtpub.Zuul;import javax.servlet.http.HttpServletRequest;import org.apache.log4j.Logger; import org.apache.log4j.spi.LoggerFactory;import com.netflix.zuul.ZuulFilter; import com.netflix.zuul.context.RequestContext;public class AccessFilter extends ZuulFilter {@Overridepublic String filterType() {return "pre";}@Overridepublic int filterOrder() {return 0;}@Overridepublic boolean shouldFilter() {return true;}@Overridepublic Object run() {RequestContext ctx = RequestContext.getCurrentContext();HttpServletRequest request = ctx.getRequest();Object accessToken = request.getParameter("accessToken");if(accessToken == null) {ctx.setSendZuulResponse(false);ctx.setResponseStatusCode(401);return null;}return null;}}

?

ZuulApplication.java

package com.packtpub.Zuul;import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.SpringCloudApplication; import org.springframework.cloud.netflix.zuul.EnableZuulProxy; import org.springframework.context.annotation.Bean;@EnableZuulProxy @SpringCloudApplication public class ZuulApplication {public static void main(String[] args) {SpringApplication.run(ZuulApplication.class, args);}@Beanpublic AccessFilter accessFilter() {return new AccessFilter();} }

轉載于:https://www.cnblogs.com/aguncn/p/6686720.html

總結

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