springcloud全家桶個人博客系統（八）使用gateway代替zull

一、前言

由於zull不在維護更新，springcloud官方推薦使用gateway代替zull。所以我們就代替一下子。

二、添加blog_gateway模塊

（1）引入pom文件

<dependencies>
        <!-- gateway路由網關 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>0.9.0.RELEASE</version>
        </dependency>
        <!-- actuator監控 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>

注意：這裏有個大坑，使用gateway，千萬不要引入boot-web以及jetty座標，否則會引起jar包衝突 。

（2）添加main

@SpringBootApplication
@EnableDiscoveryClient
public class Gateway {
        public static void main(String[] args) {
            SpringApplication.run(Gateway.class, args);
        }
}

(3)添加application.properties

server.port=9527

spring.application.name=blog_gateway


spring.cloud.nacos.discovery.server-addr=localhost:8848

spring.cloud.gateway.discovery.locator.enabled=true
spring.cloud.gateway.routes[0].id=blog-consumer-feign
spring.cloud.gateway.routes[0].uri=lb://blog-consumer-feign
spring.cloud.gateway.routes[0].predicates[0]= Path=/**

info.app.name=blog_gateway
info.company.name=www.sustly.cn
info.build.artifactId=${project.artifactId}
info.build.version=${project.version}

 這裏注意，uri和他對應的path要符合規則，否則訪問不到的

id隨便取

spring.cloud.gateway.routes[0].uri 這個是要路由的微服務

spring.cloud.gateway.routes[0].predicates[0] 路由斷言，和路由一起匹配訪問的路徑

（4）自定義filter攔截日誌

@Configuration
@Slf4j
public class LogsFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        log.info("path: " + request.getPath());
        log.info("address: " + request.getRemoteAddress());
        log.info("method: " + request.getMethodValue());
        log.info("URI: " + request.getURI());
        log.info("Headers: " + request.getHeaders());
        Object requestBody = exchange.getAttribute("cachedRequestBodyObject");
        log.info("body: "+ requestBody);
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return Ordered.HIGHEST_PRECEDENCE;
    }


}