使用gateway转发请求到nacos上对应的服务

场景

业务需要用到在nacos注册的第三方服务，页面直接调用服务，所以采用gateway转发请求的方式

过程

• 创建一个空的springboot项目

• pom文件依赖，主要注意springboot和springcloud版本对应关系

点击查看代码

<?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 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>2.3.12.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.demo</groupId>
    <artifactId>client-gateway</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR8</spring-cloud.version>
        <maven.deploy.skip>true</maven.deploy.skip>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-loadbalancer</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Hoxton.SR12</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.7.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <jvmArguments>-Dfile.encoding=UTF-8</jvmArguments>
                    <includeSystemScope>true</includeSystemScope>
                </configuration>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
        </resources>
    </build>
</project>

• 配置application文件

点击查看代码

server.port=8080
spring.application.name=nacos-gateway
spring.cloud.nacos.discovery.server-addr=ip:port
spring.cloud.nacos.discovery.username=nacos
spring.cloud.nacos.discovery.password=nacos
spring.cloud.nacos.discovery.namespace=myName
# 开启注册
spring.cloud.nacos.discovery.enabled=true
# gateway开启根据服务中心路由转发
spring.cloud.gateway.discovery.locator.enabled=true

spring.cloud.gateway.routes[0].id=third-api
spring.cloud.gateway.routes[0].uri=lb://third-service-name
spring.cloud.gateway.routes[0].predicates[0]=Path=/third-api/**
# 1的意思是转发的时候会吧path中的serviceName ，也就是第一个去掉
spring.cloud.gateway.routes[0].filters[0]=StripPrefix=1

• 启动类添加注解

点击查看代码

@SpringBootApplication
@EnableDiscoveryClient
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

启动测试

在nacos上能看到注册的gateway服务
通过http://localhost:8080/third-api/test可以获取第三方服务的测试数据