关于Gateway网关中配置跨域的三种方案

@CrossOrigin

@Configuration
public class CorsConfig {

    
    // 该配置适用于reactive响应式环境
    @Bean
    public CorsWebFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        config.addAllowedOrigin("*");
        config.addAllowedHeader("*");
        // springboot升级成2.4.0以上时对AllowedOrigin设置发生了改变，不能有”*“,可以替换成AllowedOriginPattern
        config.addAllowedOriginPattern("*");
        config.setAllowCredentials(true);

        // 必须是reactive包下的UrlBasedCorsConfigurationSource 
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
        source.registerCorsConfiguration("/**", config);

        return new CorsWebFilter(source);


    // 该配置适用于servlet环境
    @Bean
    public CorsFilter corsFilter() {
        //1. 添加 CORS配置信息
        CorsConfiguration config = new CorsConfiguration();
        //放行哪些请求方式
        config.addAllowedMethod("*");
        //放行哪些原始请求头部信息
        config.addAllowedHeader("*");
        //放行哪些原始域
        config.addAllowedOriginPattern("*");
        //是否发送 Cookie
        config.setAllowCredentials(true);
        //2. 添加映射路径
        UrlBasedCorsConfigurationSource corsConfigurationSource = new UrlBasedCorsConfigurationSource();
        corsConfigurationSource.registerCorsConfiguration("/**",config);
        //3. 返回新的CorsFilter
        return new CorsFilter(corsConfigurationSource);
    }

@Configuration
public class CorsConfig implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedMethods("*")
                .allowedHeaders("*")
                .allowedOriginPatterns("*")
                .allowCredentials(true);
    }
}

spring:
  cloud:
    gateway:
      globalcors:
        cors-configurations:
          '[/**]':
            allowedMethods: "*"
            allowedHeaders: "*"
            allowedOriginPatterns: "*"
            allowCredentials: true