Spring Cloud zuul网关配置api-gateway

﹏ヽ暗。殇╰゛Y 2022-04-10 12:41 227阅读 0赞

zuul网关，主要功能用于 限流，验证

zuul可以通过加载动态过滤机制，从而实现以下各项功能：

*  验证与安全保障: 识别面向各类资源的验证要求并拒绝那些与要求不符的请求。
 *  审查与监控: 在边缘位置追踪有意义数据及统计结果，从而为我们带来准确的生产状态结论。
 *  动态路由: 以动态方式根据需要将请求路由至不同后端集群处。
 *  压力测试: 逐渐增加指向集群的负载流量，从而计算性能水平。
 *  负载分配: 为每一种负载类型分配对应容量，并弃用超出限定值的请求。
 *  静态响应处理: 在边缘位置直接建立部分响应，从而避免其流入内部集群。
 *  多区域弹性: 跨越AWS区域进行请求路由，旨在实现ELB使用多样化并保证边缘位置与使用者尽可能接近。

除此之外，Netflix公司还利用Zuul的功能通过金丝雀版本实现精确路由与压力测试。

本文中提供 基础验证demo， 限流demo

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以下为源代码：

<?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>cn.wcuu</groupId>
        <artifactId>api-gateway</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>api-gateway</name>
        <description>Demo project for Spring Boot</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.4.RELEASE</version>
            <relativePath/> 
        </parent>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
            <spring-cloud.version>Finchley.SR1</spring-cloud.version>
    
            <docker.image.prefix>xdclass</docker.image.prefix>
    
        </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-test</artifactId>
                <scope>test</scope>
            </dependency>
    
    
    
    
    
    
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-config-client</artifactId>
            </dependency>
    
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-bus-amqp</artifactId>
            </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>
            <finalName>api-gateway</finalName>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
    
                <plugin>
                    <groupId>com.spotify</groupId>
                    <artifactId>dockerfile-maven-plugin</artifactId>
                    <version>1.3.6</version>
                    <configuration>
                        <repository>${docker.image.prefix}/${project.artifactId}</repository>
                        <buildArgs>
                            <JAR_FILE>target/${project.build.finalName}.jar</JAR_FILE>
                        </buildArgs>
                    </configuration>
                </plugin>
    
            </plugins>
        </build>
    
    
    </project>

#指定注册中心地址
    eureka:
      client:
        serviceUrl:
          # 172.19.186.233 http://192.168.4.172:8762/eureka/
          defaultZone: http://192.168.4.172:8762/eureka/
      instance:
        instance-id: ${spring.cloud.client.ip-address}:${server.port}
        prefer-ip-address: true
    
    
    #服务的名称
    spring:
      application:
        name: api-gateway
      #指定从哪个配置中心读取
      cloud:
        config:
          discovery:
            service-id: CONFIG-SERVER
            enabled: true
          profile: test
          label: dev

package cn.wcuu.apigateway.filter;
    
    
    import com.netflix.zuul.ZuulFilter;
    import com.netflix.zuul.context.RequestContext;
    import com.netflix.zuul.exception.ZuulException;
    import org.apache.commons.lang.StringUtils;
    import org.springframework.http.HttpStatus;
    import org.springframework.stereotype.Component;
    
    import javax.servlet.http.HttpServletRequest;
    
    import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;
    
    /**
     * 登录过滤器
     */
    @Component
    public class LoginFilter  extends ZuulFilter {
    
        /**
         * 过滤器类型，前置过滤器
         * @return
         */
        @Override
        public String filterType() {
            return PRE_TYPE;
        }
    
        /**
         * 过滤器顺序，越小越先执行
         * @return
         */
        @Override
        public int filterOrder() {
    
            return 4;
        }
    
    
        /**
         * 过滤器是否生效
         * @return
         */
        @Override
        public boolean shouldFilter() {
    
            RequestContext requestContext = RequestContext.getCurrentContext();
            HttpServletRequest  request = requestContext.getRequest();
    
            //ACL
    
            if ("/apigateway/order/api/v1/order/save".equalsIgnoreCase(request.getRequestURI())){
                return true;
            }
            return false;
        }
    
        /**
         * 业务逻辑
         * @return
         * @throws ZuulException
         */
        @Override
        public Object run() throws ZuulException {
    
            //JWT
            RequestContext requestContext =  RequestContext.getCurrentContext();
            HttpServletRequest  request = requestContext.getRequest();
    
            //token对象
            String token = request.getHeader("token");
    
            if(StringUtils.isBlank((token))){
                token  = request.getParameter("token");
            }
    
    
            //登录校验 JWT
            if (StringUtils.isBlank(token)) {
                    requestContext.setSendZuulResponse(false);
                    requestContext.setResponseStatusCode(HttpStatus.UNAUTHORIZED.value());
            }
    
            return null;
        }
    
    
    
    }

package cn.wcuu.apigateway.filter;
    
    import com.google.common.util.concurrent.RateLimiter;
    import com.netflix.zuul.ZuulFilter;
    import com.netflix.zuul.context.RequestContext;
    import com.netflix.zuul.exception.ZuulException;
    import org.springframework.http.HttpStatus;
    import org.springframework.stereotype.Component;
    
    import javax.servlet.http.HttpServletRequest;
    
    import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;
    
    /**
     * 限流
     */
    @Component
    public class OrderRateLimiterFilter extends ZuulFilter {
    
    
        //每秒产生20个令牌
        private static final RateLimiter RATE_LIMITER = RateLimiter.create(20);
    
        @Override
        public String filterType() {
            return PRE_TYPE;
        }
    
        @Override
        public int filterOrder() {
            return -4;
        }
    
    
    
        @Override
        public boolean shouldFilter() {
    
    
            RequestContext requestContext = RequestContext.getCurrentContext();
            HttpServletRequest request = requestContext.getRequest();
    
            //接口限流
            if ("/apigateway/provider/api/v1/list".equalsIgnoreCase(request.getRequestURI())){
                return true;
            }
    
            return false;
        }
    
        @Override
        public Object run() throws ZuulException {
            RequestContext requestContext = RequestContext.getCurrentContext();
            if(!RATE_LIMITER.tryAcquire()){
                requestContext.setSendZuulResponse(false);
                requestContext.setResponseStatusCode(HttpStatus.TOO_MANY_REQUESTS.value());
            }
            return null;
        }
    
    
    
    }

package cn.wcuu.apigateway;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
    
    @SpringBootApplication
    @EnableZuulProxy
    public class ApiGatewayApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(ApiGatewayApplication.class, args);
        }
    }

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