SpringBoot交友APP项目实战（详细介绍+案例源码） - 10.网关配置

系列文章目录

1. 项目介绍及环境配置
2. 短信验证码登录
3. 用户信息
4. MongoDB
5. 推荐好友列表/MongoDB集群/动态发布与查看
6. 圈子动态/圈子互动
7. 即时通讯（基于第三方API）
8. 附近的人(百度地图APi)
9. 小视频
10.网关配置
11.后台管理

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一、 问题分析

针对客户端API层，需要配置集群保证高可用，使用API网关解决以下问题：

• 客户端直接访问应用集群
• 访问集群需要兼顾负载均衡和容错
• 多WEB层进行路由转发，统一的拦截过滤处理

API网关 有很多实现方式，我们通过SpringCloud Gateway实现，使用Nacos作为配置中心

二、 搭建网关工程

1. 创建工程

根目录新建 tanhua-gateway 文件：

2. 导入依赖

新建 tanhua-gateway/pom.xml 文件：

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>tanhuaartifactId>
        <groupId>com.itheimagroupId>
        <version>1.0-SNAPSHOTversion>
    parent>
    <modelVersion>4.0.0modelVersion>

    <artifactId>tanhua-gatewayartifactId>

    <properties>
        <maven.compiler.source>8maven.compiler.source>
        <maven.compiler.target>8maven.compiler.target>
    properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-starter-gatewayartifactId>
        dependency>

        <dependency>
            <groupId>com.alibaba.cloudgroupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discoveryartifactId>
        dependency>

        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-actuatorartifactId>
        dependency>

        
        <dependency>
            <groupId>com.alibaba.cloudgroupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-configartifactId>
        dependency>

        <dependency>
            <groupId>com.itheimagroupId>
            <artifactId>tanhua-commonsartifactId>
            <version>1.0-SNAPSHOTversion>
        dependency>
    dependencies>
project>

3. 配置引导类

新建 tanhua-gateway/src/main/java/com/tanhua/gateway/GatewayApplication.java 文件：

@SpringBootApplication
public class GatewayApplication {

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

4. 添加配置文件

新建 tanhua-gateway/src/main/resources/application.yml 文件：

server:
  port: 8888
spring:
  profiles:
    active: prod
  application:
    name: tanhua-gateway
  cloud:
    # 配置注册中心
    nacos:
      discovery:
        server-addr: 192.168.136.160:8848
    gateway:
      globalcors:
        add-to-simple-url-handler-mapping: true
        corsConfigurations:
          '[/**]':
            allowedHeaders: "*"
            allowedOrigins: "*"
            allowedMethods:
              - GET
              - POST
              - DELETE
              - PUT
              - OPTION
      # 配置路由
      routes:
        # 探花系统
        - id: tanhua-app-server
          uri: lb://tanhua-app-server
          predicates:
            - Path=/app/**
          filters:
            - StripPrefix= 1
        # 后台系统
        - id: tanhua-admin
          uri: lb://tanhua-admin
          predicates:
            - Path=/admin/**
          filters:
            - StripPrefix= 1

5. 跨域支持

新建 tanhua-gateway/src/main/java/com/tanhua/gateway/config/CorsConfig.java 文件：

/**
 * 跨域支持
 */
@Configuration
public class CorsConfig {

    @Bean
    public CorsWebFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        config.addAllowedMethod("*");
        config.addAllowedOrigin("*");
        config.addAllowedHeader("*");
        UrlBasedCorsConfigurationSource source =
                new UrlBasedCorsConfigurationSource(new PathPatternParser());
        source.registerCorsConfiguration("/**", config);
        return new CorsWebFilter(source);
    }
}

6. 测试

三、 统一鉴权

1. 添加配置文件

编辑 tanhua-gateway/src/main/resources/application.yml 文件：

server:
  port: 8888
spring:
  profiles:
    active: prod
  application:
    name: tanhua-gateway
  cloud:
    # 配置注册中心
    nacos:
      discovery:
        server-addr: 192.168.136.160:8848
    gateway:
      globalcors:
        add-to-simple-url-handler-mapping: true
        corsConfigurations:
          '[/**]':
            allowedHeaders: "*"
            allowedOrigins: "*"
            allowedMethods:
              - GET
              - POST
              - DELETE
              - PUT
              - OPTION
      # 配置路由
      routes:
        # 探花系统
        - id: tanhua-app-server
          uri: lb://tanhua-app-server
          predicates:
            - Path=/app/**
          filters:
            - StripPrefix= 1
        # 后台系统
        - id: tanhua-admin
          uri: lb://tanhua-admin
          predicates:
            - Path=/admin/**
          filters:
            - StripPrefix= 1
gateway:
  excludedUrls: /user/login,/user/loginVerification,/system/users/verification,/system/users/login

2. 自定义过滤器

新建 tanhua-gateway/src/main/java/com/tanhua/gateway/filters/AuthFilter.java 文件：

@Component
public class AuthFilter implements GlobalFilter, Ordered {

    @Value("${gateway.excludedUrls}")
    private List<String> excludedUrls; //需要配置不校验的连接

    //过滤器核心业务代码
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1、排除不需要权限检验的连接
        String path = exchange.getRequest().getURI().getPath(); //当前请求连接
        if(excludedUrls.contains(path)) {
            return chain.filter(exchange);
        }
        //2、获取token并校验 (xxxxxx , Bearer xxxxx)
        String token = exchange.getRequest().getHeaders().getFirst("Authorization");
        if(!StringUtils.isEmpty(token)) {
            token = token.replaceAll("Bearer ","");
        }
        boolean verifyToken = JwtUtils.verifyToken(token);
        //3、如果检验失败，相应错误状态：401
        if(!verifyToken) {
            Map<String, Object> responseData = new HashMap<>();
            responseData.put("errCode", 401);
            responseData.put("errMessage", "用户未登录");
            return responseError(exchange.getResponse(),responseData);
        }
        return chain.filter(exchange);
    }

    //响应错误数据
    private Mono<Void> responseError(ServerHttpResponse response, Map<String, Object> responseData){
        // 将信息转换为 JSON
        ObjectMapper objectMapper = new ObjectMapper();
        byte[] data = new byte[0];
        try {
            data = objectMapper.writeValueAsBytes(responseData);
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
        // 输出错误信息到页面
        DataBuffer buffer = response.bufferFactory().wrap(data);
        response.setStatusCode(HttpStatus.UNAUTHORIZED);
        response.getHeaders().add("Content-Type", "application/json;charset=UTF-8");
        return response.writeWith(Mono.just(buffer));
    }

    //配置执行顺序
    public int getOrder() {
        return Ordered.LOWEST_PRECEDENCE;
    }
}

3. Postman

四. 配置中心

Nacos提供了注册中心和配置管理的能力，使用Nacos可以快速实现服务发现、服务配置管理等需求

1. 添加bootstrap.yml配置

!!! 删除 application.yml 文件
新建 tanhua-gateway/src/main/resources/bootstrap.yml 文件：

spring:
  profiles:
    # active: prod
    active: dev
  application:
    name: tanhua-gateway
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.136.160:8848
      config:
        server-addr: 192.168.136.160:8848
        file-extension: yml

2. 所有 bootstrap 配置

Gitee仓库地址（所有 bootstrap 配置）： https://gitee.com/yuan0_0/tanhua_bootstrap.git