springboot+eureka+gateway实现网关模型

springboot+eureka+gateway实现网关模型

模型代码地址：https://gitlab.com/huangqitai/web-project

1、开发工具选择idea，创建一个项目，我名为web-root

项目依赖如下：

<?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>2.2.5.RELEASE</version>
    </parent>
    <groupId>com.hqt.web</groupId>
    <artifactId>web-root</artifactId>
    <version>1.0</version>
    <name>web-root</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <packaging>pom</packaging>
    <modules>
        <module>springboot-eurekaservice</module>
        <module>springboot-eurekaclient</module>
        <module>springboot-gateway</module>
    </modules>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2、注册中心服务端搭建

1、创建模块，名为springboot-eurekaservice

2、引入注册中心依赖

<?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>
        <artifactId>web-root</artifactId>
        <groupId>com.hqt.web</groupId>
        <version>1.0</version>
    </parent>
    <groupId>com.hqt.eureka</groupId>
    <artifactId>springboot-eurekaservice</artifactId>
    <version>1.0</version>
    <name>springboot-eurekaservice</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <!--引入新的-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

eureka服务端依赖：spring-cloud-starter-netflix-eureka-server

3、配置文件 application.yml

server:
  port: 8083
  servlet:
    context-path: /
# spring 相关配置
spring:
  main:
    allow-bean-definition-overriding:
      true
  application:
    name: springboot-eureka-service
  servlet:
    multipart:
      max-file-size: 100MB
      max-request-size: 100MB
eureka:
  client:
    #false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
    fetch-registry: false 
    #表示是否向eureka注册服务，即在自己的eureka中注册自己，默认为true，此处应该设置为false，本身就是服务端，不向自己注册自己
    register-with-eureka: false
    service-url:
      #注册中心地址
      defaultZone:  http://localhost:8083/
  instance:
    appname: springboot-eureka-service
  server:
    enable-self-preservation: false
    eviction-interval-timer-in-ms: 10000
# 模块配置
gisquest-service:

logging:
  level:
    com.gisquest: info
    com.springboot.test.mapper: debug
  file: log/MineEureka.log

4、启动服务，如下表示服务端搭建成功

3、服务提供者，eureka客户端搭建

1、创建模块，名为：springboot-eurekaclient

2、客户端依赖引入

<?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>
        <artifactId>web-root</artifactId>
        <groupId>com.hqt.web</groupId>
        <version>1.0</version>
    </parent>
    <groupId>com.hqt.eurekaclient</groupId>
    <artifactId>springboot-eurekaclient</artifactId>
    <version>1.0</version>
    <name>springboot-eurekaclient</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

客户端依赖：spring-cloud-starter-netflix-eureka-client

3、配置文件 application.yml

server:
  port: 8084
  servlet:
    context-path: /
#spring 相关配置
spring:
  main:
    allow-bean-definition-overriding:
      true
  servlet:
    multipart:
      max-file-size: 100MB
      max-request-size: 100MB
  application:
    name: springboot-eureka-client
eureka:
  instance:
    appname: springboot-eureka-client
    prefer-ip-address: true
  client:
    register-with-eureka: true
    enabled: true
    fetch-registry: true
    service-url:
      defaultZone: http://localhost:8083/eureka/

#模块配置
gisquest-client:

logging:
  level:
    com.gisquest: info
    com.springboot.test.mapper: debug
  file: log/MineEurekaClient.log

4、编写一个接口作为示例

5、启动客户端，如下表示注册成功

4、gateway搭建

1、创建模块，名为 springboot-gateway

2、引入依赖

<?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>2.2.5.RELEASE</version>
    </parent>
    <groupId>com.hqt.module.gateway</groupId>
    <artifactId>springboot-gateway</artifactId>
    <version>1.0</version>
    <name>springboot-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-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>
        <!--在springboot的pom文件中，该依赖已经集成了springMVC等web启动器，不需要再添加spring-boot-starter-web 依赖了-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

网关依赖：spring-cloud-starter-gateway

3、配置文件application.yml

server:
  port: 8082
  servlet:
    context-path: /
# spring 相关配置
spring:
  main:
    allow-bean-definition-overriding:
      true
  application:
    name: springboot-gateway
  cloud:
    gateway:
      discovery:
        locator:
          enabled: true   #开启Eureka服务发现
          lower-case-service-id: true
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8083/eureka/ #Eureka Server地址
  instance:
    appname: springboot-gateway
    prefer-ip-address: true
# 模块配置
gisquest-gateway:

logging:
  level:
    com.gisquest: info
    com.springboot.test.mapper: debug
  file: log/MineGateway.log

4、启动模块

5、测试接口，通过网关访问服务提供接口

成功通过服务注册应用名，由网关访问提供的接口

6、添加网关拦截校验（模拟登录校验）

1、创建拦截器

package com.hqt.module.gateway.config;

import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.MediaType;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

import java.util.HashMap;
import java.util.Map;

@Component
public class LoginFilter  implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();

        String accessToken = request.getHeaders().getFirst("token");
        if ("xxx".equals(accessToken)){
            chain.filter(exchange);
            return chain.filter(exchange);
        }else {
            return loginResponse(exchange);
        }
    }

    @Override
    public int getOrder() {
        return 0;
    }
    public static Mono<Void> loginResponse(ServerWebExchange exchange) {
        Map<String,Object> resultJson = new HashMap<>();
        resultJson.put("code", 401);
        resultJson.put("message", "请重新登陆授权");
        resultJson.put("status", 401);
        ServerHttpResponse response = exchange.getResponse();
        byte[] bytes = resultJson.toString().getBytes();
        response.getHeaders().add("Content-Type", MediaType.APPLICATION_JSON_VALUE);
        DataBuffer buffer = response.bufferFactory().wrap(bytes);
        return response.writeWith(Flux.just(buffer));
    }
}

2、访问示例：

添加请求头访问：