SpringCloudAlibaba+zuul

pom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>2.1.6.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.dubbo.gateway</groupId>
	<artifactId>dubbo-gateway</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>dubbo-gateway</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<java.version>1.8</java.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-cloud-starter-actuator</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-zuul</artifactId>
		</dependency>

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

	<dependencyManagement>
		<dependencies>
			<!--整合spring cloud-->
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Greenwich.RELEASE</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
			<!--整合spring cloud alibaba-->
			<dependency>
				<groupId>com.alibaba.cloud</groupId>
				<artifactId>spring-cloud-alibaba-dependencies</artifactId>
				<version>2.1.1.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>
			</plugin>
		</plugins>
	</build>

</project>

application.properties

server.port=7082
spring.application.name=dubbo-demo-gateway
spring.cloud.nacos.discovery.server-addr=localhost:8848

spring.main.allow-bean-definition-overriding=true
management.endpoints.web.exposure.exclude='*'

启动类

@EnableDiscoveryClient
@EnableZuulProxy

跨域配置

@Configuration
public class CrosConfig {

    @Bean
    public FilterRegistrationBean crosFilter(){
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        CorsConfiguration crosConfiguration = new CorsConfiguration();
        crosConfiguration.setAllowCredentials(true);
        crosConfiguration.addAllowedOrigin("*");
        crosConfiguration.addAllowedMethod("*");
        crosConfiguration.addAllowedHeader("*");
        source.registerCorsConfiguration("/**",crosConfiguration);
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setOrder(0);
        return  bean;
    }
}

filter配置

package com.dubbo.gateway.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;

import javax.servlet.http.HttpServletRequest;

/**
 * @Author yanyan
 * @Date 2021/4/16 16:02
 * @Version 1.0
 */
public class filter extends ZuulFilter{
    /**
     * 过滤器的类型，它决定过滤器在请求的哪个生命周期中执行。 这里定义为pre，代表会在请求被路由之前执行。
     *
     * @return
     */
    @Override
    public String filterType() {
        return "pre";
    }

    /**
     * filter执行顺序，通过数字指定。 数字越大，优先级越低。
     *
     * @return
     */
    @Override
    public int filterOrder() {
        return 0;
    }

    /**
     * 判断该过滤器是否需要被执行。这里我们直接返回了true，因此该过滤器对所有请求都会生效。 实际运用中我们可以利用该函数来指定过滤器的有效范围。
     *
     * @return
     */
    @Override
    public boolean shouldFilter() {
        return true;
    }

    /**
     * 过滤器的具体逻辑
     *
     * @return
     */
    @Override
    public Object run() {
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();

        String token = request.getParameter("token");
        if (token == null || token.isEmpty()) {
            ctx.setSendZuulResponse(false);
            ctx.setResponseStatusCode(401);
            ctx.setResponseBody("token is empty");
        }
        return null;
    }
}