网关配置快速入门

前端请求统一发送到网关：

window.SITE_CONFIG['baseUrl'] = 'http://localhost:8088/api';

网关服务中配置路由转发：

server:
  port: 8088
  
spring:
  application:
    name: gulimall-gateway   #服务名称
    
  config:
    import: nacos:bootstrap.yaml  #引入bootstrap.yaml依赖
    
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848   #nacos地址
    gateway:
      routes:
        - id: product_route
          uri: lb://gulimall-product
          predicates:
            - Path=/api/product/**
          filters:
            - RewritePath=/api/(?<segment>.*), /$\{segment}
        # 后台管理前端请求
        - id: admin_route
          uri: lb://renren-fast
          predicates:
            - Path=/api/**
          # 前端项目发的请求都带上前缀，/api，以后网关遇到/api开头的请求都先发给renren-fast处理
          # 上面这种写法会导致请求验证码的路径变为：http://localhost:8088/api/captcha.jpg
          # 正确的请求地址应该是：http://localhost:8088/renren-fast/captcha.jpg
          filters:
            - RewritePath=/api/(?<segment>.*), /renren-fast/$\{segment}
          # 利用RewritePath，将前缀/api替换成/renren-fast
          # 所以前端发出的请求为：http://localhost:8088/api/...
          # 网管收到并处理后，转发到后台的请求为：http://localhost:8088/renren-fast/...

网关服务中新建配置类GulimallCorsConfiguration处理跨域问题：

package com.atguigu.gulimall.gateway.config;

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.cors.reactive.UrlBasedCorsConfigurationSource;

/**
 * @title: GulimallCorsConfiguration
 * @Author DengMj
 * @Date: 2024/1/21 15:36
 * @Version 1.0
 */
@Configuration
public class GulimallCorsConfiguration {
    @Bean
    public CorsWebFilter corsWebFilter(){
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();

        CorsConfiguration corsConfiguration = new CorsConfiguration();
        //1. 配置跨域
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        corsConfiguration.addAllowedOriginPattern("*");
        corsConfiguration.setAllowCredentials(true);

        source.registerCorsConfiguration("/**", corsConfiguration);
        return new CorsWebFilter(source);
    }
}