分布式组件之网关Gateway_分布式gateway的实现

网关作为流量的入口，常用功能包括路由转发，权限校验，限流控制等。而springcloud Gateway作为SpringCloud官方推出的第二代网关框架，取代了Zuul网关。

Spring Cloud Gateway

主要有三大部分

工作流程如下

 

Example  application.yml

spring:
  cloud:
    gateway:
      routes:
      - id: after_route
        uri: https://example.org
        predicates:
        - After=2017-01-20T17:42:47.789-07:00[America/Denver]

上面的例子就是设置了一个网关断言规则

现在自己创建并测试一下Api网关

首先创建一个网关模块

 pom中添加common模块依赖

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.8.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example.gulimall</groupId>
    <artifactId>gulimall-gateway</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gulimall-gateway</name>
    <description>gulimall-gateway</description>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR3</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>com.example.gulimall</groupId>
            <artifactId>gulimall-common</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</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>${spring-cloud.version}</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>

在nacos中添加配置文件

 

然后在启动类上加上服务注册发现注解@EnableDiscoveryClient

application.properties

spring.cloud.nacos.discovery.server-addr=192.168.159.135:8848
spring.application.name=gulimall-gateway
server.port=88

bootstrap.properties

spring.application.name=gulimall-gateway
 
spring.cloud.nacos.config.server-addr=192.168.159.135:8848
 
spring.cloud.nacos.config.namespace=72bcbd7a-be8c-48cf-8584-2eeee5d14664
 
spring.cloud.nacos.config.group=dev

最后再创建

application.yml

spring:
  cloud:
    gateway:
      routes:
        - id: test_route
          uri: https://www.baidu.com
          predicates:
            - Query=url,baidu
        - id: qq_route
          uri: https://www.qq.com
          predicates:
            - Query=url,qq

 表示如果地址带有url头并且为baidu时，跳转至https://www.baidu.com，qq也一样

测试http://localhost:88/?url=qq