标签：xtend extend 标识 inf 系统 order should extends figure
Zuul API路由网关服务简介
请看上图，这里的API 路由网关服务 由Zuul实现，主要就是对外提供服务接口的时候，起到了请求的路由和过滤作用，也因此能够隐藏内部服务的接口细节，从来有利于保护系统的安全性；
Zuul 路由配置
我们新建一个module microservice-zuul-3001
这里我们的zuul也注册到eureka服务里，端口3001；
我们修改下Hosts，专门为zuul搞个本地域名映射
hosts文件 加下：
127.0.0.1 zuul.jt.com
然后pom
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>com.jt</groupId> <artifactId>microservice</artifactId> <version>1.0-SNAPSHOT</version> </parent> <artifactId>modulemicroservice-zuul-3001</artifactId> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <!--zuul网关--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zuul</artifactId> </dependency> <!-- actuator监控 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <!-- hystrix容错 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-hystrix</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
搞一个 application.yml
server: port: 3001 context-path: / spring: application: name: microservice-zuul eureka: instance: instance-id: microservice-zuul:3001 prefer-ip-address: true client: service-url: defaultZone: http://eureka2001.jt.com:2001/eureka/,http://eureka2002.jt.com:2002/eureka/,http://eureka2003.jt.com:2003/eureka/ info: groupId: com.jt.testSpringcloud artifactId: microservice-zuul-3001 version: 1.0-SNAPSHOT userName: http://jt.com phone: 123456
建一个主启动类：ZuulApplication_3001
加下@EnableZuulProxy注解
package com.jt.modulemicroservicezuul3001; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration; import org.springframework.cloud.netflix.zuul.EnableZuulProxy; @SpringBootApplication(exclude={DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class}) @EnableZuulProxy public class ModulemicroserviceZuul3001Application { public static void main(String[] args) { SpringApplication.run(ModulemicroserviceZuul3001Application.class, args); } }
再加入一个ZuulFallBack
package com.jt.modulemicroservicezuul3001.fallback; import org.springframework.cloud.netflix.zuul.filters.route.ZuulFallbackProvider; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import org.springframework.http.MediaType; import org.springframework.http.client.ClientHttpResponse; import org.springframework.stereotype.Component; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; @Component public class ZuulFallBack implements ZuulFallbackProvider { @Override public String getRoute() { return "*"; } /** * 在给zuul整合回退功能时，只要类实现ZuulFallbackProvider接口，并且注册bean即可。 * * 不过需要注意的时，这个回退只有服务掉线或者超时的情况下才会触发（Camden.SR4版本测试是这样）， * 如果服务程序出现异常，此回退程序是不能处理的，异常会直接返回给调用者，比如页面。 * * @return */ @Override public ClientHttpResponse fallbackResponse() { return new ClientHttpResponse() { @Override public HttpHeaders getHeaders() { HttpHeaders headers = new HttpHeaders(); headers.setContentType(MediaType.APPLICATION_JSON_UTF8);//application/json;charset=UTF-8 return headers; } @Override public InputStream getBody() throws IOException { String msg = "服务繁忙，请稍后....."; //new ByteArrayInputStream("{\"code\":-1,\"msg\":\"服务暂不可用\"}".getBytes(StandardCharsets.UTF_8)) return new ByteArrayInputStream(msg.getBytes()); } @Override public String getStatusText() throws IOException { return HttpStatus.BAD_REQUEST.getReasonPhrase();//400 } @Override public HttpStatus getStatusCode() throws IOException { return HttpStatus.BAD_REQUEST; } @Override public int getRawStatusCode() throws IOException { return HttpStatus.BAD_REQUEST.value();//"Bad Request" } @Override public void close() { } }; } }
上面是zuul的简单使用，从接口地址很轻易的就暴露了服务提供者的唯一标识名microservice-student；有安全风险，我们需要将其隐藏；
ignored-services的作用是将原来的服务提供者唯一标识名禁用；
Prefix的作用是给服务加前缀
yml文件中添加以下配置：
zuul: routes: studentServer.serviceId: microservice-student studentServer.path: /studentServer/** ignored-services: "*" prefix: /jt
比如我们登录某个系统 需要身份验证，用户名密码啥的；
我们请求服务，也可以来设置身份验证，也就是过滤非法请求；Zuul通过ZuulFilter过滤器实现；
一般具体实现的话 每次经过Zuul服务网关 我们都对带来的token进行有效性验证；
我们先定义一个 AccessFilter类：
package com.jt.modulemicroservicezuul3001.filter; import com.netflix.zuul.ZuulFilter; import com.netflix.zuul.context.RequestContext; import com.netflix.zuul.exception.ZuulException; import org.apache.log4j.Logger; import javax.servlet.http.HttpServletRequest; public class AccessFilter extends ZuulFilter { Logger logger=Logger.getLogger(AccessFilter.class); /** * 判断该过滤器是否要被执行 */ @Override public boolean shouldFilter() { return true; } /** * 过滤器的具体执行逻辑 */ @Override public Object run() throws ZuulException { RequestContext ctx = RequestContext.getCurrentContext(); HttpServletRequest request = ctx.getRequest(); String parameter = request.getParameter("accessToken"); logger.info(request.getRequestURL().toString()+" 请求访问"); if(parameter==null){ logger.error("accessToken为空！"); ctx.setSendZuulResponse(false); ctx.setResponseStatusCode(401); ctx.setResponseBody("{\"result\":\"accessToken is empty!\"}"); return null; } // token判断逻辑 logger.info(request.getRequestURL().toString()+" 请求成功"); return null; } /** * 过滤器的类型 这里用pre，代表会再请求被路由之前执行 */ @Override public String filterType() { return "pre"; } /** * 过滤器的执行顺序 */ @Override public int filterOrder() { return 0; } }
然后再开启下 Filter配置：
package com.jt.modulemicroservicezuul3001.config; import com.jt.modulemicroservicezuul3001.filter.AccessFilter; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class ZuulConfig { @Bean public AccessFilter accessFilter(){ return new AccessFilter(); } }
标签：xtend extend 标识 inf 系统 order should extends figure
原文地址：https://www.cnblogs.com/ztbk/p/12024903.html
