103天
行百里者半九十,想要在一个行业里成为顶尖人才,一定满足一万小时定律,要想学好JAVA,需要持之以恒不断地努力,每天都要勤思考+善于询问+解决问题!
知识温故而知新>>>>>>
SpringCloud微服务的流程分析和各组件的作用
image.png今天学到的知识>>>>>>
网关解决了什么问题?
imageURL指定路由是什么规则?
URL 匹配关键字,如果包含关键字就跳转到指定的 URL 中
image3.6修改配置文件配置URL路由规则。
采用服务名称指定路由方式
使用服务名称指定路由的规则是什么?
image
路由的排除方法
修改配置文件,将路由规则修改为添加前缀法。
image过滤器类型讲解
ZuulFilter的作用是什么?
image
习题的情况总结>>>>>>
采用网关过滤器实现权限验证
需求:在网关过滤器中通过 Token 判断用户是否登录
4.2修改 pom 文件添 zuul 坐标
<?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.bjsxt</groupId>
<artifactId>zuul-gateway-example</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springcloud-eureka-consumer</name>
<description>Demo project for Spring Boot</description> <parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId> <version>1.5.13.RELEASE</version>
<relativePath /> <!-- lookup parent from repository --> </parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEn coding>
<project.reporting.outputEncoding>UTF-8</project.reporting. outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Dalston.SR5</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId> </dependency>
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>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
4.3修改配置文件
spring.application.name=zuul-gateway-example
server.port=9020
#设置服务注册中心地址,指向另一个注册中心
eureka.client.serviceUrl.defaultZone=http://user:123456@eur eka1:8761/eureka/,http://user:123456@eureka2:8761/eureka/
4.4创建 AccessFilter
/**
* 登录权限验证
* @author Administrator
*
*/
@Component
public class AccessFilter extends ZuulFilter {
private static final Logger logger =
LoggerFactory.getLogger(AccessFilter.class);
/**
* 过滤内容:在 run 方法编写过滤逻辑
*/
@Override
public Object run() {
//获取请求上下文
RequestContext rc =
RequestContext.getCurrentContext();
HttpServletRequest request = rc.getRequest();
logger.info("------------------------pre1------------------ -----------");
//获取表单中的 token
String token = request.getParameter("token");
//对 token 做判断
if(token == null){
logger.warn("token is null............");
rc.setSendZuulResponse(false);//代表请求结束。不在继
续向下请求
rc.setResponseStatusCode(401);//添加一个响应的状态码 rc.setResponseBody("{\"result\":\"token is
null\"}");//响应内容
rc.getResponse().setContentType("text/html;charset=utf-8"); //响应类型
}else{
//访问 redis 服务 进行验证
logger.info("token is OK");
}
return null;
}
/**
* 是否开启过滤器:默认为 false 不开启
*/
@Override
public boolean shouldFilter() {
// TODO Auto-generated method stub
return true;
}
/**
* 过滤器的执行顺序:通过整数表示顺序,数值越小,优先级越高 */
@Override
public int filterOrder() {
// TODO Auto-generated method stub
return 0;
}
/**
* 过滤器类型:通过过滤器类型决定了过滤器执行的时间 */
@Override
public String filterType() {
return "pre";
}
}
zuul 性能调优:网关的 2 层超时调优
修改 pom 文件添加 zuul 依赖
<?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.bjsxt</groupId>
<artifactId>zuul-gateway-timeout</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springcloud-eureka-consumer</name>
<description>Demo project for Spring Boot</description> <parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId> <version>1.5.13.RELEASE</version>
<relativePath /> <!-- lookup parent from repository --> </parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEn coding>
<project.reporting.outputEncoding>UTF-8</project.reporting. outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Dalston.SR5</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId> </dependency>
<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>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
修改配置文件
spring.application.name=zuul-gateway-timeout
server.port=9020
#设置服务注册中心地址,指向另一个注册中心
eureka.client.serviceUrl.defaultZone=http://user:123456@eur eka1:8761/eureka/,http://user:123456@eureka2:8761/eureka/
#第一层 hystrix 超时时间设置
#默认情况下是线程池隔离,超时时间 1000ms
hystrix.command.default.execution.isolation.thread.timeoutI nMilliseconds=8000
#第二层 ribbon超时时间设置:设置比第一层小
# 请求连接的超时时间: 默认 5s
ribbon.ConnectTimeout=5000
# 请求处理的超时时间: 默认 5s
ribbon.ReadTimeout=5000
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