API网关

一、网关相关配置

1、在pom.xml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">
    <parent>
        <artifactId>infrastructure</artifactId>
        <groupId>com.javaclimb</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>api_gateway</artifactId>
    <dependencies>
        <!-- 网关 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
        <!--服务注册-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <dependency>
            <groupId>com.javaclimb</groupId>
            <artifactId>common_util</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <!-- 排除 spring-boot-starter-web, 否则和 gateway 中的 webflux 冲突  -->
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-web</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!--将随着spring-boot-starter-web排除的servlet-api添加回来 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>

        <!--gson-->
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

</project>

2、application.yml

server:
  port: 8090

spring:
  profiles:
    active: dev
  application:
    name: infrastructure-apigateway

  cloud:
    # nacos 服务
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
    gateway:
      discovery:
        locator:
          # gateway 可以发现 nacos 中的微服务
          enabled: true
      routes:
        - id: service-edu # 随便起
          # uri: http://localhost:9110 # 目标路由
          # 目标路由,必须和 nacos 中微服务名称一样, lb -> 以负载均衡的方式访问
          uri: lb://service-edu
          predicates:
            # 路径断言,只要这个条件成立,就转发到上面的地址
            - Path=/user/**, /*/edu/**
        - id: service-cms
          uri: lb://service-cms
          predicates:
            - Path=/*/cms/**
          # 过滤器
          filters:
            - SetStatus=250 # 修改响应状态码为 250
        - id: service-oss
          uri: lb://service-oss
          predicates:
            - Path=/*/oss/**
        - id: service-trade
          uri: lb://service-trade
          predicates:
            - Path=/*/trade/**
        - id: service-ucenter
          uri: lb://service-ucenter
          predicates:
            - Path=/*/ucenter/**
        - id: service-vod
          uri: lb://service-vod
          predicates:
            - Path=/*/vod/**
        - id: service-statistics
          uri: lb://service-statistics
          predicates:
            - Path=/*/statistics/**
        - id: service-acl
          uri: lb://service-acl
          predicates:
            - Path=/*/acl/**

3、编写启动类

package com.stu.infrastructure;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

/******************************
 * 用途说明:
 * 作者姓名: Administrator
 * 创建时间: 2022-07-27 22:56
 ******************************/

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

4、网关解决跨域问题

package com.stu.infrastructure.confing;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.reactive.CorsWebFilter;
import org.springframework.web.util.pattern.PathPatternParser;

/******************************
 * 用途说明:
 * 作者姓名: Administrator
 * 创建时间: 2022-07-27 23:16
 ******************************/
@Configuration
public class CorsConfig {
    @Bean
    public CorsWebFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        // #允许向该服务器提交请求的URI，*表示全部允许，在SpringMVC中，如果设成*，会自动转成当前请求头中的Origin
        config.addAllowedOrigin("*");
        // #允许访问的头信息,*表示全部
        config.addAllowedHeader("*");
        // 允许提交请求的方法类型，*表示全部允许
        config.addAllowedMethod("*");

        org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource source =
                new org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource(new PathPatternParser());
        source.registerCorsConfiguration("/**", config);
        return new CorsWebFilter(source);
    }

}

5、全局Filter，统一处理会员登录与外部不允许访问的服务

package com.stu.infrastructure.filter;

/******************************
 * 用途说明:
 * 作者姓名: Administrator
 * 创建时间: 2022-07-27 23:35
 ******************************/

import com.stu.service.base.utils.JwtUtils;
import com.google.gson.JsonObject;
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.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.nio.charset.StandardCharsets;
import java.util.List;

@Component
public class AuthGlobalFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {

        // 获取请求对象
        ServerHttpRequest request = exchange.getRequest();
        String path = request.getURI().getPath();

        // 匹配路由
        AntPathMatcher antPathMatcher = new AntPathMatcher();
        // 判断路径中如果含有 /api/**/auth/**,则需要鉴权
        if (antPathMatcher.match("/api/**/auth/**", path)) {
            // 获取 token
            List<String> tokenList = request.getHeaders().get("token");
            // 没有 token
            if (tokenList == null) {
                ServerHttpResponse response = exchange.getResponse();
                // 鉴权失败
                return this.out(response);
            }

            // token 检验失败
            boolean isCheck = JwtUtils.checkJwtToken(tokenList.get(0));
            if (!isCheck) {
                ServerHttpResponse response = exchange.getResponse();
                // 鉴权失败
                return this.out(response);
            }
        }
        // 放行: 使用过滤器链,将请求继续向下传递
        return chain.filter(exchange);
    }


    /**
     * 定义当前过滤器的优先级
     *  - 值越小, 优先级越高
     */
    @Override
    public int getOrder() {
        return 0;
    }

    /**
     * 使用 webflux 输入请求信息
     */
    private Mono<Void> out(ServerHttpResponse response) {

        JsonObject message = new JsonObject();
        message.addProperty("success", false);
        message.addProperty("code", 28004);
        message.addProperty("data", "");
        message.addProperty("message", "鉴权失败");
        byte[] bytes = message.toString().getBytes(StandardCharsets.UTF_8);
        DataBuffer buffer = response.bufferFactory().wrap(bytes);
        //指定编码，否则在浏览器中会中文乱码
        response.getHeaders().add("Content-Type", "application/json;charset=UTF-8");
        //输出http响应
        return response.writeWith(Mono.just(buffer));
    }

}

六、前端俩项目修改连接地址

把前端请求地址的端口修改位网关的接口

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>
    <modules>
        <module>service</module>
        <module>common</module>
        <module>infrastructure</module>
    </modules>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.stu</groupId>
    <artifactId>edu_parent</artifactId>
    <packaging>pom</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>edu_parent</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <mybatis-plus.version>3.4.0</mybatis-plus.version>
        <velocity.version>2.0</velocity.version>
        <swagger.version>2.9.2</swagger.version>
        <aliyun.oss.version>3.1.0</aliyun.oss.version>
        <jodatime.version>2.10.6</jodatime.version>
        <commons-fileupload.version>1.3.1</commons-fileupload.version>
        <commons-io.version>2.6</commons-io.version>
        <commons-lang.version>3.9</commons-lang.version>
        <httpclient.version>4.5.1</httpclient.version>
        <jwt.version>0.9.1</jwt.version>
        <aliyun-java-sdk-core.version>4.3.3</aliyun-java-sdk-core.version>
        <aliyun-java-sdk-kms.version>2.10.1</aliyun-java-sdk-kms.version>
        <aliyun-java-sdk-vod.version>2.15.10</aliyun-java-sdk-vod.version>
        <aliyun-sdk-vod-upload.version>1.4.11</aliyun-sdk-vod-upload.version>
        <fastjson.version>1.2.28</fastjson.version>
        <gson.version>2.8.2</gson.version>
        <json.version>20170516</json.version>
        <commons-dbutils.version>1.6</commons-dbutils.version>
        <canal.client.version>1.1.4</canal.client.version>
        <docker.image.prefix>zx</docker.image.prefix>
        <alibaba.easyexcel.version>2.2.6</alibaba.easyexcel.version>
        <apache.xmlbeans.version>3.1.0</apache.xmlbeans.version>
        <cloud-alibaba.version>2.2.1.RELEASE</cloud-alibaba.version>
        <spring-cloud-starter-gateway>2.2.0.RELEASE</spring-cloud-starter-gateway>
    </properties>

    <dependencyManagement>
        <dependencies>
            <!--Spring Cloud-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Hoxton.SR8</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-alibaba-dependencies -->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!--mybatis-plus 持久层-->
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>${mybatis-plus.version}</version>
            </dependency>

            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-generator</artifactId>
                <version>${mybatis-plus.version}</version>
            </dependency>

            <!-- velocity 模板引擎, Mybatis Plus 代码生成器需要 -->
            <dependency>
                <groupId>org.apache.velocity</groupId>
                <artifactId>velocity-engine-core</artifactId>
                <version>${velocity.version}</version>
            </dependency>

            <!--swagger-->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>${swagger.version}</version>
            </dependency>

            <!--swagger ui-->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger-ui</artifactId>
                <version>${swagger.version}</version>
            </dependency>

            <!--aliyunOSS-->
            <dependency>
                <groupId>com.aliyun.oss</groupId>
                <artifactId>aliyun-sdk-oss</artifactId>
                <version>${aliyun.oss.version}</version>
            </dependency>

            <!--日期时间工具-->
            <dependency>
                <groupId>joda-time</groupId>
                <artifactId>joda-time</artifactId>
                <version>${jodatime.version}</version>
            </dependency>

            <!--文件上传-->
            <dependency>
                <groupId>commons-fileupload</groupId>
                <artifactId>commons-fileupload</artifactId>
                <version>${commons-fileupload.version}</version>
            </dependency>

            <!--commons-io-->
            <dependency>
                <groupId>commons-io</groupId>
                <artifactId>commons-io</artifactId>
                <version>${commons-io.version}</version>
            </dependency>

            <!--commons-lang3-->
            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-lang3</artifactId>
                <version>${commons-lang.version}</version>
            </dependency>

            <!--httpclient-->
            <dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpclient</artifactId>
                <version>${httpclient.version}</version>
            </dependency>

            <!-- JWT -->
            <dependency>
                <groupId>io.jsonwebtoken</groupId>
                <artifactId>jjwt</artifactId>
                <version>${jwt.version}</version>
            </dependency>

            <!--aliyun-->
            <dependency>
                <groupId>com.aliyun</groupId>
                <artifactId>aliyun-java-sdk-core</artifactId>
                <version>${aliyun-java-sdk-core.version}</version>
            </dependency>
            <dependency>
                <groupId>com.aliyun</groupId>
                <artifactId>aliyun-java-sdk-kms</artifactId>
                <version>${aliyun-java-sdk-kms.version}</version>
            </dependency>
            <dependency>
                <groupId>com.aliyun</groupId>
                <artifactId>aliyun-java-sdk-vod</artifactId>
                <version>${aliyun-java-sdk-vod.version}</version>
            </dependency>

            <dependency>
                <groupId>com.aliyun</groupId>
                <artifactId>aliyun-sdk-vod-upload</artifactId>
                <version>${aliyun-sdk-vod-upload.version}</version>
            </dependency>

            <!--            json-->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>${fastjson.version}</version>
            </dependency>

            <dependency>
                <groupId>org.json</groupId>
                <artifactId>json</artifactId>
                <version>${json.version}</version>
            </dependency>

            <dependency>
                <groupId>com.google.code.gson</groupId>
                <artifactId>gson</artifactId>
                <version>${gson.version}</version>
            </dependency>

            <dependency>
                <groupId>commons-dbutils</groupId>
                <artifactId>commons-dbutils</artifactId>
                <version>${commons-dbutils.version}</version>
            </dependency>

            <dependency>
                <groupId>com.alibaba.otter</groupId>
                <artifactId>canal.client</artifactId>
                <version>${canal.client.version}</version>
            </dependency>

            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>easyexcel</artifactId>
                <version>${alibaba.easyexcel.version}</version>
            </dependency>

            <dependency>
                <groupId>org.apache.xmlbeans</groupId>
                <artifactId>xmlbeans</artifactId>
                <version>${apache.xmlbeans.version}</version>
            </dependency>

        </dependencies>
    </dependencyManagement>

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

</project>